From ff820e3d53434889aacde2373314c3be8d00f765 Mon Sep 17 00:00:00 2001
From: Vratko Polak <vrpolak@cisco.com>
Date: Fri, 23 Aug 2019 17:00:29 +0200
Subject: [PATCH] Introduce reconfig suites, for dot1q+ip4+vxlan

Ticket: CSIT-1551

+ Config copied from other suites.
+ Layer keywords prepared for additional chains.
+ Renamed "create" argument to "vlan_per_chain".
+ TrafficGenerator result extraction improvements.
 + Also unified TG type and subtype checking.
+ Throughput estimated as PDR for zero PLR.
+ Actual Qemu start is skipped.
+ Parse xstats instead of stats in trex stop scipt.
 - Because stats are unconditionally cleared on each script connect.
+ Remember start values to get better ReceiveMeasurementResult at stop.
+ Expose loss count and time as appropriate test message.
+ Autogen support.
+ Multiple chain amounts and core densities.
 - Only 1 additional chain.
+ Proper TAGs. Documented.
 + Clarified min framesize tags are for TG-DUT.
  + Added a TODO concerning overhead values.
 + Added 118B tag.
+ Robot performance keywords improvements.
 + Added missing return value documentation.
 + Frame size as required test variable, not an explicit argument.
 + MLRsearch keyword to store result (not into test message).
  - TODO: De-duplicate: main keyword to measure, minor to set test message.
   - But implementation uses the fact default arguments are different.
 + Keywords for starting and stopping background traffic.
  - No checks whether start-stop pair is complete.
+ Multiple minor indentation and logging improvements.
- Missing / TODOs:
 - Support also vlan_per_chain=True?
 - Support dot1q without vxlan?
 - Support also deletion?
 - How to package config steps so -reconf can be generated from -ndrpdr?

Change-Id: If0270697f9ffa837c34ef802917220a53f156703
Signed-off-by: Vratko Polak <vrpolak@cisco.com>
---
 docs/tag_documentation.rst                         |  46 +++--
 resources/libraries/bash/entry/check/tc_naming.sh  |   4 +-
 resources/libraries/python/TrafficGenerator.py     | 195 +++++++++++++--------
 resources/libraries/python/autogen/Regenerator.py  |  44 ++++-
 .../libraries/robot/l2/l2_bridge_domain.robot      |   8 +-
 .../robot/performance/performance_limits.robot     |   5 +
 .../robot/performance/performance_utils.robot      | 143 +++++++++++++--
 resources/libraries/robot/shared/interfaces.robot  | 127 +++++++++-----
 resources/tools/trex/trex_stateless_stop.py        |  39 +++--
 ...l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...xlan-l2bd-10ch-20vh-10vm1t-testpmd-ndrpdr.robot |   4 +-
 ...xlan-l2bd-10ch-20vh-10vm2t-testpmd-ndrpdr.robot |   4 +-
 ...an-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...an-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...p4vxlan-l2bd-1ch-2vh-1vm1t-testpmd-ndrpdr.robot |   4 +-
 ...p4vxlan-l2bd-1ch-2vh-1vm2t-testpmd-ndrpdr.robot |   4 +-
 ...an-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...an-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...p4vxlan-l2bd-2ch-4vh-2vm1t-testpmd-ndrpdr.robot |   4 +-
 ...p4vxlan-l2bd-2ch-4vh-2vm2t-testpmd-ndrpdr.robot |   4 +-
 ...an-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...an-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...p4vxlan-l2bd-4ch-8vh-4vm1t-testpmd-ndrpdr.robot |   4 +-
 ...p4vxlan-l2bd-4ch-8vh-4vm2t-testpmd-ndrpdr.robot |   4 +-
 ...4vxlan-l2bd-6ch-12vh-6vm1t-testpmd-ndrpdr.robot |   4 +-
 ...4vxlan-l2bd-6ch-12vh-6vm2t-testpmd-ndrpdr.robot |   4 +-
 ...n-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...n-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...4vxlan-l2bd-8ch-16vh-8vm1t-testpmd-ndrpdr.robot |   4 +-
 ...4vxlan-l2bd-8ch-16vh-8vm2t-testpmd-ndrpdr.robot |   4 +-
 ...n-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf.robot | 160 +++++++++++++++++
 ...n-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf.robot | 160 +++++++++++++++++
 33 files changed, 2392 insertions(+), 187 deletions(-)
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf.robot
 create mode 100644 tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf.robot

diff --git a/docs/tag_documentation.rst b/docs/tag_documentation.rst
index b28fd89c6f..5c68858bfa 100644
--- a/docs/tag_documentation.rst
+++ b/docs/tag_documentation.rst
@@ -220,20 +220,33 @@ Performance Type Tags
 
     Performance tests using PLRsearch to find the critical load.
 
+.. topic:: RECONF
+
+    Performance tests aimed to measure lost packets (time) when performing
+    reconfiguration while full throughput offered load is applied.
+
 Ethernet Frame Size Tags
 ------------------------
 
+These are describing the traffic offered by Traffic Generator,
+"primary" traffic in case of asymmetric load.
+For traffic between DUTs, or for "secondary" traffic, see ${overhead} value.
+
 .. topic:: 64B
 
-    64B frames used for test.
+    64B frames used for test. Generic ethernet or IPv4.
 
 .. topic:: 78B
 
-    78B frames used for test.
+    78B frames used for test. Ipv6.
 
 .. topic:: 114B
 
-    114B frames used for test.
+    114B frames used for test. IPv4+vxlan.
+
+.. topic:: 118B
+
+    118B frames used for test. Dot1q+IPv4+vxlan.
 
 .. topic:: IMIX
 
@@ -337,35 +350,40 @@ NF Service Density Tags
 
 .. topic:: CHAIN
 
-   NF service density tests with VNF or CNF service chain topology(ies).
+    NF service density tests with VNF or CNF service chain topology(ies).
 
 .. topic:: PIPE
 
-   NF service density tests with CNF service pipeline topology(ies).
+    NF service density tests with CNF service pipeline topology(ies).
 
 .. topic:: NF_L3FWDIP4
 
-   NF service density tests with DPDK l3fwd IPv4 routing as NF workload.
+    NF service density tests with DPDK l3fwd IPv4 routing as NF workload.
 
 .. topic:: NF_VPPIP4
 
-   NF service density tests with VPP IPv4 routing as NF workload.
+    NF service density tests with VPP IPv4 routing as NF workload.
 
 .. topic:: {r}R{c}C
 
-   Service density matrix locator {r}R{c}C, {r}Row denoting number of
-   service instances, {c}Column denoting number of NFs per service
-   instance. {r}=(1,2,4,6,8,10), {c}=(1,2,4,6,8,10).
+    Service density matrix locator {r}R{c}C, {r}Row denoting number of
+    service instances, {c}Column denoting number of NFs per service
+    instance. {r}=(1,2,4,6,8,10), {c}=(1,2,4,6,8,10).
 
 .. topic:: {n}VM{t}T
 
-   Service density {n}VM{t}T, {n}Number of NF Qemu VMs, {t}Number of threads
-   per NF.
+    Service density {n}VM{t}T, {n}Number of NF Qemu VMs, {t}Number of threads
+    per NF.
 
 .. topic:: {n}DCRt}T
 
-   Service density {n}DCR{t}T, {n}Number of NF Docker containers, {t}Number of
-   threads per NF.
+    Service density {n}DCR{t}T, {n}Number of NF Docker containers, {t}Number of
+    threads per NF.
+
+.. topic:: {n}_ADDED_CHAINS
+
+    {n}Number of chains (or pipelines) added (and/or removed)
+    during RECONF test.
 
 Forwarding Mode Tags
 --------------------
diff --git a/resources/libraries/bash/entry/check/tc_naming.sh b/resources/libraries/bash/entry/check/tc_naming.sh
index b8a2775035..b193cfad5e 100644
--- a/resources/libraries/bash/entry/check/tc_naming.sh
+++ b/resources/libraries/bash/entry/check/tc_naming.sh
@@ -66,7 +66,7 @@ r_testc_rules=(
     #'(ipsec[[:digit:]]+tnlhw|ipsec[[:digit:]]+tnlsw|'
     #'srhip6|tcp|udp|lispip6|lispip4|vxlan){0,1}'
     #'(http){0,1}-'
-    '(.*)-(dev|ndrpdr|cps|rps)$'
+    '(.*)-(dev|ndrpdr|cps|rps|reconf)$'
     )
 s_suite_rules=(
     'number of SUT nodes'
@@ -85,7 +85,7 @@ r_suite_rules=(
     #'(ipsec[[:digit:]]+tnlhw|ipsec[[:digit:]]+tnlsw|'
     #'srhip6|tcp|udp|lispip6|lispip4|vxlan){0,1}'
     #'(http){0,1}-'
-    '(.*)-(dev|ndrpdr|cps|rps)$'
+    '(.*)-(dev|ndrpdr|cps|rps|reconf)$'
     )
 
 rm -f "tc_naming.log" || die
diff --git a/resources/libraries/python/TrafficGenerator.py b/resources/libraries/python/TrafficGenerator.py
index cc968f8e09..2e9b787321 100644
--- a/resources/libraries/python/TrafficGenerator.py
+++ b/resources/libraries/python/TrafficGenerator.py
@@ -13,6 +13,8 @@
 
 """Performance testing traffic generator library."""
 
+import time
+
 from robot.api import logger
 from robot.libraries.BuiltIn import BuiltIn
 
@@ -30,6 +32,31 @@ from .PLRsearch.PLRsearch import PLRsearch
 __all__ = ['TGDropRateSearchImpl', 'TrafficGenerator', 'OptimizedSearch']
 
 
+def check_subtype(node):
+    """Return supported subtype of given node, or raise an exception.
+
+    Currently only one subtype is supported,
+    but we want our code to be ready for other ones.
+
+    :param node: Topology node to check. Can be None.
+    :type node: dict or NoneType
+    :returns: Subtype detected.
+    :rtype: NodeSubTypeTG
+    :raises RuntimeError: If node is not supported, message explains how.
+    """
+    if node.get('type') is None:
+        raise RuntimeError('Node type is not defined')
+    elif node['type'] != NodeType.TG:
+        raise RuntimeError('Node type is {typ!r}, not a TG'.format(
+            typ=node['type']))
+    elif node.get('subtype') is None:
+        raise RuntimeError('TG subtype is not defined')
+    elif node['subtype'] == NodeSubTypeTG.TREX:
+        return NodeSubTypeTG.TREX
+    raise RuntimeError('TG subtype {sub!r} is not supported'.format(
+        sub=node['subtype']))
+
+
 class TGDropRateSearchImpl(DropRateSearch):
     """Drop Rate Search implementation."""
 
@@ -62,34 +89,23 @@ class TGDropRateSearchImpl(DropRateSearch):
         # to be able to use trex_stl-*()
         tg_instance = BuiltIn().get_library_instance(
             'resources.libraries.python.TrafficGenerator')
-
-        if tg_instance.node['subtype'] is None:
-            raise RuntimeError('TG subtype not defined')
-        elif tg_instance.node['subtype'] == NodeSubTypeTG.TREX:
+        subtype = check_subtype(tg_instance.node)
+        if subtype == NodeSubTypeTG.TREX:
             unit_rate = str(rate) + self.get_rate_type_str()
             if skip_warmup:
-                tg_instance.trex_stl_start_remote_exec(self.get_duration(),
-                                                       unit_rate, frame_size,
-                                                       traffic_profile,
-                                                       warmup_time=0.0)
+                tg_instance.trex_stl_start_remote_exec(
+                    self.get_duration(), unit_rate, frame_size, traffic_profile,
+                    warmup_time=0.0)
             else:
-                tg_instance.trex_stl_start_remote_exec(self.get_duration(),
-                                                       unit_rate, frame_size,
-                                                       traffic_profile)
+                tg_instance.trex_stl_start_remote_exec(
+                    self.get_duration(), unit_rate, frame_size, traffic_profile)
             loss = tg_instance.get_loss()
             sent = tg_instance.get_sent()
             if self.loss_acceptance_type_is_percentage():
                 loss = (float(loss) / float(sent)) * 100
-
-            logger.trace("comparing: {} < {} {}".format(loss,
-                                                        loss_acceptance,
-                                                        loss_acceptance_type))
-            if float(loss) > float(loss_acceptance):
-                return False
-            else:
-                return True
-        else:
-            raise NotImplementedError("TG subtype not supported")
+            logger.trace("comparing: {los} < {acc} {typ}".format(
+                los=loss, acc=loss_acceptance, typ=loss_acceptance_type))
+            return float(loss) <= float(loss_acceptance)
 
     def get_latency(self):
         """Returns min/avg/max latency.
@@ -114,15 +130,20 @@ class TrafficGenerator(AbstractMeasurer):
     ROBOT_LIBRARY_SCOPE = 'TEST SUITE'
 
     def __init__(self):
+        # TODO: Number of fields will be reduced with CSIT-1378.
+        self._node = None
+        # T-REX interface order mapping
+        self._ifaces_reordered = False
+        # Result holding fields, to be removed.
         self._result = None
         self._loss = None
         self._sent = None
         self._latency = None
         self._received = None
-        self._node = None
-        # T-REX interface order mapping
-        self._ifaces_reordered = False
-        # Parameters not given by measure().
+        # Measurement input fields, needed for async stop result.
+        self._start_time = None
+        self._rate = None
+        # Other input parameters, not knowable from measure() signature.
         self.frame_size = None
         self.traffic_profile = None
         self.warmup_time = None
@@ -199,11 +220,10 @@ class TrafficGenerator(AbstractMeasurer):
         :returns: nothing
         :raises RuntimeError: In case of issue during initialization.
         """
-        if tg_node['type'] != NodeType.TG:
-            raise RuntimeError('Node type is not a TG')
-        self._node = tg_node
+        subtype = check_subtype(tg_node)
+        if subtype == NodeSubTypeTG.TREX:
+            self._node = tg_node
 
-        if self._node['subtype'] == NodeSubTypeTG.TREX:
             ssh = SSH()
             ssh.connect(self._node)
 
@@ -293,9 +313,7 @@ class TrafficGenerator(AbstractMeasurer):
         :type osi_layer: str
         :raises RuntimeError: If node subtype is not a TREX or startup failed.
         """
-        if self._node['subtype'] != NodeSubTypeTG.TREX:
-            raise RuntimeError('Node subtype is not a TREX!')
-
+        # No need to check subtype, we know it is TREX.
         for _ in range(0, 3):
             # Kill TRex only if it is already running.
             cmd = "sh -c 'pgrep t-rex && pkill t-rex && sleep 3 || true'"
@@ -357,8 +375,7 @@ class TrafficGenerator(AbstractMeasurer):
         :rtype: bool
         :raises RuntimeError: If node type is not a TG.
         """
-        if node['type'] != NodeType.TG:
-            raise RuntimeError('Node type is not a TG')
+        # No need to check subtype, we know it is TREX.
 
         ssh = SSH()
         ssh.connect(node)
@@ -375,9 +392,8 @@ class TrafficGenerator(AbstractMeasurer):
         :raises RuntimeError: If node type is not a TG,
             or if TRex teardown fails.
         """
-        if node['type'] != NodeType.TG:
-            raise RuntimeError('Node type is not a TG')
-        if node['subtype'] == NodeSubTypeTG.TREX:
+        subtype = check_subtype(node)
+        if subtype == NodeSubTypeTG.TREX:
             ssh = SSH()
             ssh.connect(node)
             (ret, _, _) = ssh.exec_command(
@@ -385,25 +401,49 @@ class TrafficGenerator(AbstractMeasurer):
             if int(ret) != 0:
                 raise RuntimeError('pkill t-rex failed')
 
-    @staticmethod
-    def trex_stl_stop_remote_exec(node):
+    def _parse_traffic_results(self, stdout):
+        """Parse stdout of scripts into fieds of self.
+
+        Block of code to reuse, by sync start, or stop after async.
+        TODO: Is the output TG subtype dependent?
+
+        :param stdout: Text containing the standard output.
+        :type stdout: str
+        """
+        # last line from console output
+        line = stdout.splitlines()[-1]
+        self._result = line
+        logger.info('TrafficGen result: {0}'.format(self._result))
+        self._received = self._result.split(', ')[1].split('=')[1]
+        self._sent = self._result.split(', ')[2].split('=')[1]
+        self._loss = self._result.split(', ')[3].split('=')[1]
+        self._latency = []
+        self._latency.append(self._result.split(', ')[4].split('=')[1])
+        self._latency.append(self._result.split(', ')[5].split('=')[1])
+
+    def trex_stl_stop_remote_exec(self, node):
         """Execute script on remote node over ssh to stop running traffic.
 
+        Internal state is updated with results.
+
         :param node: TRex generator node.
         :type node: dict
         :returns: Nothing
         :raises RuntimeError: If stop traffic script fails.
         """
+        # No need to check subtype, we know it is TREX.
         ssh = SSH()
         ssh.connect(node)
 
-        (ret, _, _) = ssh.exec_command(
+        (ret, stdout, _) = ssh.exec_command(
             "sh -c '{}/resources/tools/trex/"
             "trex_stateless_stop.py'".format(Constants.REMOTE_FW_DIR))
 
         if int(ret) != 0:
             raise RuntimeError('TRex stateless runtime error')
 
+        self._parse_traffic_results(stdout)
+
     def trex_stl_start_remote_exec(
             self, duration, rate, frame_size, traffic_profile, async_call=False,
             latency=True, warmup_time=5.0, unidirection=False, tx_port=0,
@@ -435,6 +475,7 @@ class TrafficGenerator(AbstractMeasurer):
         :type rx_port: int
         :raises RuntimeError: In case of TG driver issue.
         """
+        # No need to check subtype, we know it is TREX.
         ssh = SSH()
         ssh.connect(self._node)
         reorder = self._ifaces_reordered  # Just to make the next line fit.
@@ -471,21 +512,16 @@ class TrafficGenerator(AbstractMeasurer):
             raise RuntimeError('TRex stateless runtime error')
         elif async_call:
             #no result
+            self._start_time = time.time()
+            self._rate = float(rate[:-3]) if "pps" in rate else rate
             self._received = None
             self._sent = None
             self._loss = None
             self._latency = None
         else:
-            # last line from console output
-            line = stdout.splitlines()[-1]
-            self._result = line
-            logger.info('TrafficGen result: {0}'.format(self._result))
-            self._received = self._result.split(', ')[1].split('=')[1]
-            self._sent = self._result.split(', ')[2].split('=')[1]
-            self._loss = self._result.split(', ')[3].split('=')[1]
-            self._latency = []
-            self._latency.append(self._result.split(', ')[4].split('=')[1])
-            self._latency.append(self._result.split(', ')[5].split('=')[1])
+            self._parse_traffic_results(stdout)
+            self._start_time = None
+            self._rate = None
 
     def stop_traffic_on_tg(self):
         """Stop all traffic on TG.
@@ -493,9 +529,8 @@ class TrafficGenerator(AbstractMeasurer):
         :returns: Nothing
         :raises RuntimeError: If TG is not set.
         """
-        if self._node is None:
-            raise RuntimeError("TG is not set")
-        if self._node['subtype'] == NodeSubTypeTG.TREX:
+        subtype = check_subtype(self._node)
+        if subtype == NodeSubTypeTG.TREX:
             self.trex_stl_stop_remote_exec(self._node)
 
     def send_traffic_on_tg(
@@ -547,22 +582,11 @@ class TrafficGenerator(AbstractMeasurer):
             or if subtype is not specified.
         :raises NotImplementedError: If TG is not supported.
         """
-
-        node = self._node
-        if node is None:
-            raise RuntimeError("TG is not set")
-
-        if node['type'] != NodeType.TG:
-            raise RuntimeError('Node type is not a TG')
-
-        if node['subtype'] is None:
-            raise RuntimeError('TG subtype not defined')
-        elif node['subtype'] == NodeSubTypeTG.TREX:
+        subtype = check_subtype(self._node)
+        if subtype == NodeSubTypeTG.TREX:
             self.trex_stl_start_remote_exec(
                 duration, rate, frame_size, traffic_profile, async_call,
                 latency, warmup_time, unidirection, tx_port, rx_port)
-        else:
-            raise NotImplementedError("TG subtype not supported")
 
         return self._result
 
@@ -629,6 +653,36 @@ class TrafficGenerator(AbstractMeasurer):
         self.traffic_profile = str(traffic_profile)
         self.warmup_time = float(warmup_time)
 
+    def get_measurement_result(self, duration=None, transmit_rate=None):
+        """Return the result of last measurement as ReceiveRateMeasurement.
+
+        Separate function, as measurements can end either by time
+        or by explicit call, this is the common block at the end.
+
+        TODO: Fail on running or already reported measurement.
+
+        :param duration: Measurement duration [s] if known beforehand.
+            For explicitly stopped measurement it is estimated.
+        :param transmit_rate: Target aggregate transmit rate [pps].
+            If not given, computed assuming it was bidirectional.
+        :type duration: float or NoneType
+        :type transmit_rate: float or NoneType
+        :returns: Structure containing the result of the measurement.
+        :rtype: ReceiveRateMeasurement
+        """
+        if duration is None:
+            duration = time.time() - self._start_time
+            self._start_time = None
+        if transmit_rate is None:
+            # Assuming bi-directional traffic here.
+            transmit_rate = self._rate * 2.0
+        transmit_count = int(self.get_sent())
+        loss_count = int(self.get_loss())
+        measurement = ReceiveRateMeasurement(
+            duration, transmit_rate, transmit_count, loss_count)
+        measurement.latency = self.get_latency_int()
+        return measurement
+
     def measure(self, duration, transmit_rate):
         """Run bi-directional measurement, parse and return results.
 
@@ -644,17 +698,12 @@ class TrafficGenerator(AbstractMeasurer):
         """
         duration = float(duration)
         transmit_rate = float(transmit_rate)
-        # Trex needs target Tr per stream, but reports aggregate Tx and Dx.
+        # TG needs target Tr per stream, but reports aggregate Tx and Dx.
         unit_rate = str(transmit_rate / 2.0) + "pps"
         self.send_traffic_on_tg(
             duration, unit_rate, self.frame_size, self.traffic_profile,
             warmup_time=self.warmup_time, latency=True)
-        transmit_count = int(self.get_sent())
-        loss_count = int(self.get_loss())
-        measurement = ReceiveRateMeasurement(
-            duration, transmit_rate, transmit_count, loss_count)
-        measurement.latency = self.get_latency_int()
-        return measurement
+        return self.get_measurement_result(duration, transmit_rate)
 
 
 class OptimizedSearch(object):
diff --git a/resources/libraries/python/autogen/Regenerator.py b/resources/libraries/python/autogen/Regenerator.py
index a9f3ef433d..778ced76c9 100644
--- a/resources/libraries/python/autogen/Regenerator.py
+++ b/resources/libraries/python/autogen/Regenerator.py
@@ -207,8 +207,48 @@ def write_default_files(in_filename, in_prolog, kwargs_list):
                     testcase, iface, suite_id, file_out, kwargs_list)
 
 
+def write_reconf_files(in_filename, in_prolog, kwargs_list):
+    """Using given filename and prolog, write all generated reconf suites.
+
+    Use this for suite type reconf, as its local template
+    is incompatible with mrr/ndrpdr/soak local template,
+    while test cases are compatible.
+
+    :param in_filename: Template filename to derive real filenames from.
+    :param in_prolog: Template content to derive real content from.
+    :param kwargs_list: List of kwargs for add_testcase.
+    :type in_filename: str
+    :type in_prolog: str
+    :type kwargs_list: list of dict
+    """
+    _, suite_id = get_iface_and_suite_id(in_filename)
+    testcase = Testcase.default(suite_id)
+    for nic_name in Constants.NIC_NAME_TO_CODE:
+        out_filename = replace_defensively(
+            in_filename, "10ge2p1x710",
+            Constants.NIC_NAME_TO_CODE[nic_name], 1,
+            "File name should contain NIC code once.", in_filename)
+        out_prolog = replace_defensively(
+            in_prolog, "Intel-X710", nic_name, 2,
+            "NIC name should appear twice (tag and variable).",
+            in_filename)
+        if out_prolog.count("HW_") == 2:
+            # TODO CSIT-1481: Crypto HW should be read
+            # from topology file instead.
+            if nic_name in Constants.NIC_NAME_TO_CRYPTO_HW.keys():
+                out_prolog = replace_defensively(
+                    out_prolog, "HW_DH895xcc",
+                    Constants.NIC_NAME_TO_CRYPTO_HW[nic_name], 1,
+                    "HW crypto name should appear.", in_filename)
+        iface, suite_id = get_iface_and_suite_id(out_filename)
+        with open(out_filename, "w") as file_out:
+            file_out.write(out_prolog)
+            add_default_testcases(
+                testcase, iface, suite_id, file_out, kwargs_list)
+
+
 def write_tcp_files(in_filename, in_prolog, kwargs_list):
-    """Using given filename and prolog, write all generated suites.
+    """Using given filename and prolog, write all generated tcp suites.
 
     :param in_filename: Template filename to derive real filenames from.
     :param in_prolog: Template content to derive real content from.
@@ -293,6 +333,8 @@ class Regenerator(object):
                     file_in.read().partition("*** Test Cases ***")[:-1])
             if in_filename.endswith("-ndrpdr.robot"):
                 write_default_files(in_filename, in_prolog, default_kwargs_list)
+            elif in_filename.endswith("-reconf.robot"):
+                write_reconf_files(in_filename, in_prolog, default_kwargs_list)
             elif in_filename[-10:] in ("-cps.robot", "-rps.robot"):
                 write_tcp_files(in_filename, in_prolog, tcp_kwargs_list)
             else:
diff --git a/resources/libraries/robot/l2/l2_bridge_domain.robot b/resources/libraries/robot/l2/l2_bridge_domain.robot
index e15f8b4338..6c16ed447f 100644
--- a/resources/libraries/robot/l2/l2_bridge_domain.robot
+++ b/resources/libraries/robot/l2/l2_bridge_domain.robot
@@ -186,16 +186,18 @@
 | | ... | *Arguments:*
 | | ... | - nf_chains - Number of chains of NFs. Type: integer
 | | ... | - nf_nodes - Number of NFs nodes per chain. Type: integer
+| | ... | - start - Id of first chain, allows to add chains during test.
+| | ... |     Type: integer
 | | ...
 | | ... | *Example:*
 | | ...
 | | ... | \| Initialize L2 bridge domains for multiple chains with Vhost-User \
-| | ... | \| 1 \| 1 \|
+| | ... | \| 3 \| 1 \| 2 \|
 | | ...
-| | [Arguments] | ${nf_chains}=${1} | ${nf_nodes}=${1}
+| | [Arguments] | ${nf_chains}=${1} | ${nf_nodes}=${1} | ${start}=${1}
 | | ...
 | | Set interfaces in path up
-| | :FOR | ${nf_chain} | IN RANGE | 1 | ${nf_chains} + 1
+| | :FOR | ${nf_chain} | IN RANGE | ${start} | ${nf_chains} + 1
 | | | Initialize L2 bridge domains with Vhost-User
 | | | ... | nf_chain=${nf_chain} | nf_nodes=${nf_nodes}
 
diff --git a/resources/libraries/robot/performance/performance_limits.robot b/resources/libraries/robot/performance/performance_limits.robot
index 759ee5c28f..67ef3cf5b0 100644
--- a/resources/libraries/robot/performance/performance_limits.robot
+++ b/resources/libraries/robot/performance/performance_limits.robot
@@ -75,6 +75,11 @@
 | | ... | \| Set test Variable \| \${frame_size} \| IMIX_v4_1 \|
 | | ... | \| Set Max Rate And Jumbo \|
 | | ...
+| | # Negative overhead is possible, if DUT-DUT traffic is less encapsulated
+| | # than TG-DUT traffic.
+| | # TODO: Re-check overhead values in suites with both traffics encapsulated.
+| | # TODO: Improve layered setup to detect encap/decap and update overhead.
+| | ${overhead} = | Set Variable If | ${overhead} >= 0 | ${overhead} | ${0}
 | | ${pps_limit} = | Set Variable | ${18750000.0}
 | | ${bps_limit} = | Get From Dictionary | ${NIC_NAME_TO_LIMIT} | ${nic_name}
 | | ${avg_size} = | Get Average Frame Size | ${frame_size}
diff --git a/resources/libraries/robot/performance/performance_utils.robot b/resources/libraries/robot/performance/performance_utils.robot
index 54b20cba2d..d809376c0f 100644
--- a/resources/libraries/robot/performance/performance_utils.robot
+++ b/resources/libraries/robot/performance/performance_utils.robot
@@ -32,7 +32,7 @@
 | | [Documentation]
 | | ... | Find boundaries for RFC2544 compatible NDR and PDR values
 | | ... | using an optimized search algorithm.
-| | ... | Display results as formatted test message.
+| | ... | Display findings as a formatted test message.
 | | ... | Fail if a resulting lower bound has too high loss fraction.
 | | ... | Input rates are understood as uni-directional,
 | | ... | reported result contains bi-directional rates.
@@ -61,7 +61,7 @@
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Find NDR and PDR intervals using optimized search \| \${0.005}
+| | ... | \| Find NDR and PDR intervals using optimized search \| \${0.005} \
 | | ... | \| \${0.005} \| \${30.0} \| \${1.0} \| \${2} \| ${600.0} \| ${2} \|
 | | ...
 | | [Arguments] | ${packet_loss_ratio}=${0.005}
@@ -76,13 +76,83 @@
 | | ... | ${final_trial_duration} | ${initial_trial_duration}
 | | ... | ${number_of_intermediate_phases} | timeout=${timeout}
 | | ... | doublings=${doublings}
-| | Display result of NDRPDR search | ${result} | ${frame_size}
+| | Display result of NDRPDR search | ${result}
 | | Check NDRPDR interval validity | ${result.pdr_interval}
 | | ... | ${packet_loss_ratio}
 | | Check NDRPDR interval validity | ${result.ndr_interval}
 | | Perform additional measurements based on NDRPDR result
 | | ... | ${result} | ${frame_size} | ${traffic_profile}
 
+| Display Reconfig Test Message
+| | [Documentation]
+| | ... | Display the number of packets lost (bidirectionally)
+| | ... | due to reconfiguration under traffic.
+| | ...
+| | ... | *Arguments:*
+| | ... | - result - Result of bidirectional measurtement.
+| | ... |   Type: ReceiveRateMeasurement
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Display Reconfig Test Message \| \${result} \|
+| | ...
+| | [Arguments] | ${result}
+| | ...
+| | Set Test Message | Packets lost due to reconfig: ${result.loss_count}
+| | ${time_lost} = | Evaluate | ${result.loss_count} / ${result.target_tr}
+| | Set Test Message | ${\n}Implied time lost: ${time_lost} | append=yes
+
+| Find Throughput Using MLRsearch
+| | [Documentation]
+| | ... | Find and return lower bound PDR (zero PLR by default)
+| | ... | bi-directional throughput using MLRsearch algorithm.
+| | ... | Input rates are understood as uni-directional,
+| | ... | reported result contains bi-directional rates.
+| | ... | Currently, the min_rate value is hardcoded to match test teardowns.
+| | ...
+| | ... | TODO: Should the trial duration of the additional
+| | ... | measurements be configurable?
+| | ...
+| | ... | Some inputs are read from variables to streamline suites.
+| | ...
+| | ... | *Test (or broader scope) variables read:*
+| | ... | - traffic_profile - Name of module defining traffc for measurements.
+| | ... | Type: string
+| | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: int or str
+| | ... | - max_rate - Calculated unidirectional maximal transmit rate [pps].
+| | ... | Type: float
+| | ...
+| | ... | *Arguments:*
+| | ... | - packet_loss_ratio - Accepted loss during search. Type: float
+| | ... | - final_relative_width - Maximal width multiple of upper. Type: float
+| | ... | - final_trial_duration - Duration of final trials [s]. Type: float
+| | ... | - initial_trial_duration - Duration of initial trials [s]. Type: float
+| | ... | - intermediate phases - Number of intermediate phases [1]. Type: int
+| | ... | - timeout - Fail if search duration is longer [s]. Type: float
+| | ... | - doublings - How many doublings to do when expanding [1]. Type: int
+| | ...
+| | ... | *Returns:*
+| | ... | - Lower bound for bi-directional throughput at given PLR. Type: float
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| \${throughpt}= \| Find Throughput Using MLRsearch \| \${0} \
+| | ... | \| \${0.001} \| \${10.0}\| \${1.0} \| \${1} \| ${720.0} \| ${2} \|
+| | ...
+| | [Arguments] | ${packet_loss_ratio}=${0.0}
+| | ... | ${final_relative_width}=${0.001} | ${final_trial_duration}=${10.0}
+| | ... | ${initial_trial_duration}=${1.0}
+| | ... | ${number_of_intermediate_phases}=${1} | ${timeout}=${720.0}
+| | ... | ${doublings}=${2}
+| | ...
+| | ${result} = | Perform optimized ndrpdr search | ${frame_size}
+| | ... | ${traffic_profile} | ${20000} | ${max_rate*2}
+| | ... | ${packet_loss_ratio} | ${final_relative_width}
+| | ... | ${final_trial_duration} | ${initial_trial_duration}
+| | ... | ${number_of_intermediate_phases} | timeout=${timeout}
+| | ... | doublings=${doublings}
+| | Return From Keyword | ${result.pdr_interval.measured_low.transmit_rate}
+
 | Find critical load using PLRsearch
 | | [Documentation]
 | | ... | Find boundaries for troughput (of given target loss ratio)
@@ -116,7 +186,7 @@
 | | ... | ${traffic_profile} | ${min_rate} | ${max_rate*2}
 | | ... | ${packet_loss_ratio} | timeout=${timeout}
 | | ${lower} | ${upper} = | Display result of soak search
-| | ... | ${average} | ${stdev} | ${frame_size}
+| | ... | ${average} | ${stdev}
 | | Should Not Be True | ${lower} < ${min_rate}
 | | ... | Lower bound ${lower} is below bidirectional minimum ${min_rate}.
 
@@ -162,15 +232,16 @@
 | | ... | (Throughput * (L2 Frame Size + IPG) * 8) / Max bitrate of NIC
 | | ... | The given result should contain latency data as well.
 | | ...
+| | ... | *Test (or broader scope) variables read:*
+| | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: int or str
 | | ... | *Arguments:*
 | | ... | - result - Measured result data per stream [pps]. Type: NdrPdrResult
-| | ... | - frame_size - L2 Frame Size [B]. Type: integer
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Display result of NDRPDR search \| \${result} \| \${64} \|
+| | ... | \| Display result of NDRPDR search \| \${result} \|
 | | ...
-| | [Arguments] | ${result} | ${frame_size}
+| | [Arguments] | ${result}
 | | ...
 | | ${frame_size} = | Get Average Frame Size | ${frame_size}
 | | Display single bound | NDR_LOWER
@@ -196,19 +267,20 @@
 | | ... | TODO: Do we want to report some latency data,
 | | ... | even if not measured at the reported bounds?.
 | | ...
+| | ... | *Test (or broader scope) variables read:*
+| | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: int or str
 | | ... | *Arguments:*
 | | ... | - avg - Estimated average critical load [pps]. Type: float
 | | ... | - stdev - Standard deviation of critical load [pps]. Type: float
-| | ... | - frame_size - L2 Frame Size [B]. Type: integer
 | | ...
 | | ... | *Returns:*
 | | ... | - Lower and upper bound of critical load [pps]. Type: 2-tuple of float
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Display result of soak search \| \${100000} \| \${100} \| \${64} \|
+| | ... | \| Display result of soak search \| \${100000} \| \${100} \|
 | | ...
-| | [Arguments] | ${avg} | ${stdev} | ${frame_size}
+| | [Arguments] | ${avg} | ${stdev}
 | | ...
 | | ${frame_size} = | Get Average Frame Size | ${frame_size}
 | | ${avg} = | Convert To Number | ${avg}
@@ -321,7 +393,7 @@
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Traffic should pass with maximum rate \| ${1} \| ${10.0} \|
+| | ... | \| Traffic should pass with maximum rate \| ${1} \| ${10.0} \
 | | ... | \| ${False} \| ${False} \| ${0} \| ${1} \|
 | | ...
 | | [Arguments] | ${trial_duration}=${perf_trial_duration}
@@ -399,7 +471,7 @@
 | | ...
 | | ... | *Arguments:*
 | | ... | - duration - Duration of traffic run [s]. Type: integer
-| | ... | - rate - Rate for sending packets. Type: string
+| | ... | - rate - Unidirectional rate for sending packets. Type: string
 | | ... | - frame_size - L2 Frame Size [B] or IMIX_v4_1. Type: integer/string
 | | ... | - traffic_profile - Name of module defining traffc for measurements.
 | | ... | Type: string
@@ -425,3 +497,50 @@
 | | Run Keyword If | ${dut_stats}==${True}
 | | ... | Show runtime counters on all DUTs | ${nodes}
 | | Stop traffic on tg
+
+| Start Traffic on Background
+| | [Documentation]
+| | ... | Start traffic at specified rate then return control to Robot.
+| | ... | Useful if the test needs to do something while traffic is running.
+| | ... | Just a wrapper around L1 keyword.
+| | ... |
+| | ... | TODO: How to make sure the traffic is stopped on any failure?
+| | ...
+| | ... | *Test (or broader scope) variables read:*
+| | ... | - traffic_profile - Name of module defining traffc for measurements.
+| | ... | Type: string
+| | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: int or str
+| | ... | *Arguments:*
+| | ... | - rate - Unidirectional rate for sending packets. Type: string
+| | ... | - unidirection - False if traffic is bidirectional. Type: boolean
+| | ... | - tx_port - TX port of TG, default 0. Type: integer
+| | ... | - rx_port - RX port of TG, default 1. Type: integer
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Start Traffic on Background \| 4.0mpps \| ${False} \| ${0} \
+| | ... | \| ${1} \|
+| | ...
+| | [Arguments] | ${rate} | ${unidirection}=${False} | ${tx_port}=${0}
+| | ... | ${rx_port}=${1}
+| | ...
+| | # Duration of -1 means we will stop traffic manually.
+| | Send traffic on tg | ${-1} | ${rate} | ${frame_size} | ${traffic_profile}
+| | ... | warmup_time=${0} | async_call=${True} | latency=${False}
+| | ... | unidirection=${unidirection} | tx_port=${tx_port} | rx_port=${rx_port}
+
+| Stop Running Traffic
+| | [Documentation]
+| | ... | Stop the running traffic, return measurement result.
+| | ... | For bidirectional traffic, the reported values are bi-directional.
+| | ... | Just a wrapper around L1 keyword.
+| | ... |
+| | ... | TODO: Tolerate if traffic was not started.
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \${result}= \| Stop Running Traffic \|
+| | ...
+| | Stop traffic on tg
+| | ${result}= | Get Measurement Result
+| | Return From Keyword | ${result}
diff --git a/resources/libraries/robot/shared/interfaces.robot b/resources/libraries/robot/shared/interfaces.robot
index 55d0a3d844..f3fb3decd5 100644
--- a/resources/libraries/robot/shared/interfaces.robot
+++ b/resources/libraries/robot/shared/interfaces.robot
@@ -233,53 +233,82 @@
 | | | ... | count=${count}
 | | Set Test Variable | ${prev_layer} | bond
 
+| Initialize layer dot1q on node for chain
+| | [Documentation]
+| | ... | Optionally create tag popping subinterface per chain.
+| | ... | Return interface indices for dot1q layer interfaces,
+| | ... | or Nones if subinterfaces are not created.
+| | ...
+| | ... | *Arguments:*
+| | ... | - dut - DUT node. Type: string
+| | ... | - id - Positive index of the chain. Type: integer
+| | ... | - vlan_per_chain - Whether to create vlan subinterface for each chain.
+| | ... |     Type: boolean
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Initialize layer dot1q on node for chain \| DUT1 \| 1 \| True \|
+| | ...
+| | [Arguments] | ${dut} | ${id} | ${vlan_per_chain}=${True}
+| | ...
+| | ${dut_str}= | Convert To Lowercase | ${dut}
+| | Return From Keyword If | ${id} != ${1} and not ${vlan_per_chain}
+| | ... | ${NONE} | ${NONE}
+| | # TODO: Is it worth creating Get Variable Value If Not None keyword?
+| | ${default}= | Evaluate | ${100} + ${id} - ${1}
+| | ${if1_vlan}= | Get Variable Value | \${${dut_str}_vlan1}
+| | ${if1_vlan}= | Set Variable If | '${if1_vlan}' != '${NONE}'
+| | ... | ${if1_vlan} | ${default}
+| | ${default}= | Evaluate | ${200} + ${id} - ${1}
+| | ${if2_vlan}= | Get Variable Value | \${${dut_str}_vlan2}
+| | ${if2_vlan}= | Set Variable If | '${if2_vlan}' != '${NONE}'
+| | ... | ${if2_vlan} | ${default}
+| | ${if1_name} | ${if1_index}= | Create Vlan Subinterface
+| | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${id}_1}
+| | ... | ${if1_vlan}
+| | ${if2_name} | ${if2_index}= | Create Vlan Subinterface
+| | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${id}_2}
+| | ... | ${if2_vlan}
+| | Set Interface State | ${nodes['${dut}']} | ${if1_index} | up
+| | Set Interface State | ${nodes['${dut}']} | ${if2_index} | up
+| | Configure L2 tag rewrite method on interfaces
+| | ... | ${nodes['${dut}']} | ${if1_index} | TAG_REWRITE_METHOD=pop-1
+| | Configure L2 tag rewrite method on interfaces
+| | ... | ${nodes['${dut}']} | ${if2_index} | TAG_REWRITE_METHOD=pop-1
+| | Return From Keyword | ${if1_index} | ${if2_index}
+
 | Initialize layer dot1q on node
 | | [Documentation]
 | | ... | Dot1q interfaces and variables to be created on all DUT's node
 | | ... | interfaces.
 | | ...
+| | ... | TODO: Unify names for number of chains/pipelines/instances/interfaces.
+| | ... | Chose names and descriptions that makes sense for both
+| | ... | nf_density and older tests.
+| | ... | Note that with vlan_per_chain=False it is not a number of interfaces.
+| | ... | At least not number of real interfaces, just number of aliases.
+| | ... | This TODO applies also to all keywords with nf_chains argument.
+| | ...
 | | ... | *Arguments:*
 | | ... | - dut - DUT node. Type: string
-| | ... | - count - Number of tagged interfaces. Type: integer
-| | ... | - create - Whether to create vlan subinterface for each chain.
+| | ... | - count - Number of chains. Type: integer
+| | ... | - vlan_per_chain - Whether to create vlan subinterface for each chain.
 | | ... |     Type: boolean
+| | ... | - start - Id of first chain, allows adding chains during test.
+| | ... |     Type: integer
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Initialize layer dot1q on node \| DUT1 \| 1 \| True \|
+| | ... | \| Initialize layer dot1q on node \| DUT1 \| 3 \| True \| 2 \|
 | | ...
-| | [Arguments] | ${dut} | ${count}=${1} | ${create}=${True}
+| | [Arguments] | ${dut} | ${count}=${1} | ${vlan_per_chain}=${True}
+| | ... | ${start}=${1}
 | | ...
 | | ${dut_str}= | Convert To Lowercase | ${dut}
-| | :FOR | ${id} | IN RANGE | 1 | ${count} + 1
-| | | ${if1_vlan}= | Get Variable Value | \${${dut_str}_vlan1}
-| | | ${default}= | Evaluate | ${100} + ${id} - ${1}
-| | | ${if1_vlan}= | Set Variable If | '${if1_vlan}' == '${NONE}'
-| | | ... | ${default} | ${if1_vlan}
-| | | ${if2_vlan}= | Get Variable Value | \${${dut_str}_vlan2}
-| | | ${default}= | Evaluate | ${200} + ${id} - ${1}
-| | | ${if2_vlan}= | Set Variable If | '${if2_vlan}' == '${NONE}'
-| | | ... | ${default} | ${if2_vlan}
-| | | ${if1_name} | ${if1_index}= | Run Keyword If
-| | | ... | ${create} or ${id} == ${1}
-| | | ... | Create Vlan Subinterface
-| | | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${id}_1}
-| | | ... | ${if1_vlan}
-| | | ${if2_name} | ${if2_index}= | Run Keyword If
-| | | ... | ${create} or ${id} == ${1}
-| | | ... | Create Vlan Subinterface
-| | | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_${id}_2}
-| | | ... | ${if2_vlan}
-| | | Run Keyword If | ${create} or ${id} == ${1}
-| | | ... | Set Interface State | ${nodes['${dut}']} | ${if1_index} | up
-| | | Run Keyword If | ${create} or ${id} == ${1}
-| | | ... | Set Interface State | ${nodes['${dut}']} | ${if2_index} | up
-| | | Run Keyword If | ${create} or ${id} == ${1}
-| | | ... | Configure L2 tag rewrite method on interfaces
-| | | ... | ${nodes['${dut}']} | ${if1_index} | TAG_REWRITE_METHOD=pop-1
-| | | Run Keyword If | ${create} or ${id} == ${1}
-| | | ... | Configure L2 tag rewrite method on interfaces
-| | | ... | ${nodes['${dut}']} | ${if2_index} | TAG_REWRITE_METHOD=pop-1
+| | :FOR | ${id} | IN RANGE | ${start} | ${count} + 1
+| | | ${if1_index} | ${if2_index}= | Initialize layer dot1q on node for chain
+| | | ... | dut=${dut} | id=${id} | vlan_per_chain=${vlan_per_chain}
+| | | # First id results in non-None indices, after that _1_ are defined.
 | | | ${if1_index}= | Set Variable If | '${if1_index}' == '${NONE}'
 | | | ... | ${${dut_str}_dot1q_1_1} | ${if1_index}
 | | | ${if2_index}= | Set Variable If | '${if2_index}' == '${NONE}'
@@ -292,16 +321,19 @@
 | | ... | Dot1q interfaces and variables to be created on all DUT's interfaces.
 | | ...
 | | ... | *Arguments:*
-| | ... | - count - Number of tagged interfaces. Type: integer
-| | ... | - create - Whether to create vlan for each chain. Type: boolean
+| | ... | - count - Number of chains. Type: integer
+| | ... | - vlan_per_chain - Whether to create vlan subinterface for each chain.
+| | ... |     Type: boolean
+| | ... | - start - Id of first chain, allows adding chains during test.
+| | ... |     Type: integer
 | | ...
-| | ... | \| Initialize layer dot1q \| 1 \| True \|
+| | ... | \| Initialize layer dot1q \| 3 \| True \| 2 \|
 | | ...
-| | [Arguments] | ${count}=${1} | ${create}=${True}
+| | [Arguments] | ${count}=${1} | ${vlan_per_chain}=${True} | ${start}=${1}
 | | ...
 | | :FOR | ${dut} | IN | @{duts}
 | | | Initialize layer dot1q on node | ${dut} | count=${count}
-| | | ... | create=${create}
+| | | ... | vlan_per_chain=${vlan_per_chain} | start=${start}
 | | Set Test Variable | ${prev_layer} | dot1q
 
 | Initialize layer ip4vxlan on node
@@ -314,21 +346,23 @@
 | | ... | *Arguments:*
 | | ... | - dut - DUT node. Type: string
 | | ... | - count - Number of vxlan interfaces. Type: integer
+| | ... | - start - Id of first chain, allows adding chains during test.
+| | ... |     Type: integer
 | | ...
 | | ... | *Example:*
 | | ...
-| | ... | \| Initialize layer ip4vxlan on node \| DUT1 \| 1 \|
+| | ... | \| Initialize layer ip4vxlan on node \| DUT1 \| 3 \| 2 \|
 | | ...
-| | [Arguments] | ${dut} | ${count}=${1}
+| | [Arguments] | ${dut} | ${count}=${1} | ${start}=${1}
 | | ...
 | | ${dut_str}= | Convert To Lowercase | ${dut}
-| | VPP Interface Set IP Address
+| | Run Keyword If | "${start}" == "1" | VPP Interface Set IP Address
 | | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_1_1}
 | | ... | 172.16.0.1 | 24
-| | VPP Interface Set IP Address
+| | Run Keyword If | "${start}" == "1" | VPP Interface Set IP Address
 | | ... | ${nodes['${dut}']} | ${${dut_str}_${prev_layer}_1_2}
 | | ... | 172.26.0.1 | 24
-| | :FOR | ${id} | IN RANGE | 1 | ${count} + 1
+| | :FOR | ${id} | IN RANGE | ${start} | ${count} + 1
 | | | ${subnet}= | Evaluate | ${id} - 1
 | | | ${vni}= | Evaluate | ${id} - 1
 | | | ${ip4vxlan_1}= | Create VXLAN interface
@@ -368,13 +402,16 @@
 | | ...
 | | ... | *Arguments:*
 | | ... | - count - Number of vxlan interfaces. Type: integer
+| | ... | - start - Id of first chain, allows adding chains during test.
+| | ... |     Type: integer
 | | ...
-| | ... | \| Initialize layer ip4vxlan \| 1 \|
+| | ... | \| Initialize layer ip4vxlan \| 3 \| 2 \|
 | | ...
-| | [Arguments] | ${count}=${1}
+| | [Arguments] | ${count}=${1} | ${start}=${1}
 | | ...
 | | :FOR | ${dut} | IN | @{duts}
 | | | Initialize layer ip4vxlan on node | ${dut} | count=${count}
+| | ... | start=${start}
 | | Set Test Variable | ${prev_layer} | ip4vxlan
 
 | Configure vhost interfaces
diff --git a/resources/tools/trex/trex_stateless_stop.py b/resources/tools/trex/trex_stateless_stop.py
index 9ded59a041..9421356bc1 100755
--- a/resources/tools/trex/trex_stateless_stop.py
+++ b/resources/tools/trex/trex_stateless_stop.py
@@ -34,31 +34,44 @@ from trex.stl.api import *
 
 
 def main():
-    """Stop traffic if any is running."""
+    """Stop traffic if any is running. Report xstats."""
     client = STLClient()
     try:
         # connect to server
         client.connect()
 
         client.acquire(force=True)
+        # TODO: Support unidirection.
         client.stop(ports=[0, 1])
 
         # read the stats after the test
-        stats = client.get_stats()
+        xstats0 = client.get_xstats(0)
+        xstats1 = client.get_xstats(1)
 
-        print("#####statistics (approx.)#####")
-        print(json.dumps(stats, indent=4, separators=(',', ': ')))
-
-        lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
-        lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
-
-        print("\npackets lost from 0 --> 1:   {0} pkts".format(lost_a))
-        print("packets lost from 1 --> 0:   {0} pkts".format(lost_b))
-    except STLError as ex_error:
-        print(ex_error, file=sys.stderr)
-        sys.exit(1)
+    # If STLError happens, let the script fail with stack trace.
     finally:
         client.disconnect()
 
+    print("##### statistics port 0 #####")
+    print(json.dumps(xstats0, indent=4, separators=(',', ': ')))
+    print("##### statistics port 1 #####")
+    print(json.dumps(xstats1, indent=4, separators=(',', ': ')))
+
+    tx_0, rx_0 = xstats0["tx_good_packets"], xstats0["rx_good_packets"]
+    tx_1, rx_1 = xstats1["tx_good_packets"], xstats1["rx_good_packets"]
+    lost_a, lost_b = tx_0 - rx_1, tx_1 - rx_0
+
+    print("\npackets lost from 0 --> 1:   {0} pkts".format(lost_a))
+    print("packets lost from 1 --> 0:   {0} pkts".format(lost_b))
+
+    total_rcvd, total_sent = rx_0 + rx_1, tx_0 + tx_1
+    total_lost = total_sent - total_rcvd
+    # TODO: Add latency.
+    print(
+        "rate='unknown', totalReceived={rec}, totalSent={sen}, frameLoss={los},"
+        " latencyStream0(usec)=-1/-1/-1, latencyStream1(usec)=-1/-1/-1,"
+        " targetDuration='manual'".format(
+            rec=total_rcvd, sen=total_sent, los=total_lost))
+
 if __name__ == "__main__":
     main()
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..d08e086e9e
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 10R1C | 1_ADDED_CHAIN | 10VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${10}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..932f135fa0
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 10R1C | 1_ADDED_CHAIN | 10VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${10}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-10ch-1ach-20vh-10vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm1t-testpmd-ndrpdr.robot
index beea4025a4..6646264738 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 20 vhosts 10 chains 10 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm2t-testpmd-ndrpdr.robot
index 290a7f31c3..b65ee0e661 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-10ch-20vh-10vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 20 vhosts 10 chains 10 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..e7404b9894
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 1R1C | 1_ADDED_CHAIN | 1VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${1}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..ff1c6184fc
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 1R1C | 1_ADDED_CHAIN | 1VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${1}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-1ch-1ach-2vh-1vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm1t-testpmd-ndrpdr.robot
index 408ee665a2..bf53dab305 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 2 vhosts 1 chain 1 VM*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm2t-testpmd-ndrpdr.robot
index b6873823b2..23c880a937 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-1ch-2vh-1vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 2 vhosts 1 chain 1 VM*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..117afb7ebe
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 2R1C | 1_ADDED_CHAIN | 2VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${2}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..6e4a3aa461
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 2R1C | 1_ADDED_CHAIN | 2VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${2}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-2ch-1ach-4vh-2vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm1t-testpmd-ndrpdr.robot
index 54ad6d8ef4..924ef0b1ab 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 4 vhosts 2 chains 2 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm2t-testpmd-ndrpdr.robot
index 0b4e69f3b9..5d5ea5744c 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-2ch-4vh-2vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 4 vhost 2 chains 2 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..5651bf1fe3
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 4R1C | 1_ADDED_CHAIN | 4VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${4}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..153f3ab4b6
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 4R1C | 1_ADDED_CHAIN | 4VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${4}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-4ch-1ach-8vh-4vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm1t-testpmd-ndrpdr.robot
index df9f217046..e6f04156a1 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 8 vhosts 4 chains 4 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm2t-testpmd-ndrpdr.robot
index 469de8fde0..2ae04825da 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-4ch-8vh-4vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 8 vhosts 4 chains 4 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm1t-testpmd-ndrpdr.robot
index 318e0bbe55..1fd804a039 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 12 vhosts 6 chains 6 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm2t-testpmd-ndrpdr.robot
index e7b9800662..8e02d5d2e8 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-12vh-6vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 12 vhosts 6 chains 6 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..4d2d601c08
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 6R1C | 1_ADDED_CHAIN | 6VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${6}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..b02e4aa787
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 6R1C | 1_ADDED_CHAIN | 6VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${6}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-6ch-1ach-12vh-6vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm1t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm1t-testpmd-ndrpdr.robot
index 88f3f8cf90..3995fda452 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm1t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm1t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 16 vhost 8 chains 8 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm2t-testpmd-ndrpdr.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm2t-testpmd-ndrpdr.robot
index 3c5764ddcc..ab67c244df 100644
--- a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm2t-testpmd-ndrpdr.robot
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-16vh-8vm2t-testpmd-ndrpdr.robot
@@ -27,7 +27,7 @@
 | Test Template | Local Template
 | ...
 | Documentation | *RFC2544: Packet throughput L2BD test cases with Dot1Q and
-| ... | VXLANoIPv4 and 16 vhosts 8 chains 8 VMs*
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
 | ...
 | ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
 | ... | with single links between nodes.
@@ -88,7 +88,7 @@
 | | When Initialize layer interface
 | | ... | count=${nf_chains}
 | | And Initialize layer dot1q
-| | ... | count=${nf_chains} | create=${False}
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
 | | And Initialize layer ip4vxlan
 | | ... | count=${nf_chains}
 | | And Initialize L2 bridge domains for multiple chains with Vhost-User
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf.robot
new file mode 100644
index 0000000000..e8846ac9fe
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 8R1C | 1_ADDED_CHAIN | 8VM1T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${2}
+| ${nf_dtc}= | ${0.5}
+| ${nf_chains}= | ${8}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm1t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
diff --git a/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf.robot b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf.robot
new file mode 100644
index 0000000000..cdd79aba3a
--- /dev/null
+++ b/tests/vpp/perf/nfv_density/vm_vhost/chain_dot1qip4vxlan/2n-10ge2p1x710-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf.robot
@@ -0,0 +1,160 @@
+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Resource | resources/libraries/robot/shared/default.robot
+| ...
+| Force Tags | 2_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF
+| ... | NIC_Intel-X710 | L2BDMACLRN | ENCAP | VXLAN | L2OVRLAY | IP4UNRLAY
+| ... | VHOST | VM | VHOST_1024 | VXLAN | DOT1Q | NF_DENSITY | NF_TESTPMD
+| ... | CHAIN | 8R1C | 1_ADDED_CHAIN | 8VM2T
+| ...
+| Suite Setup | Setup suite single link | performance
+| Suite Teardown | Tear down suite | performance
+| Test Setup | Setup test
+| Test Teardown | Tear down test | performance | vhost
+| ...
+| Test Template | Local Template
+| ...
+| Documentation | *RFC2544: Packet loss L2BD test cases with Dot1Q and
+| ... | VXLANoIPv4 with ${nf_chains} instances, ${nf_nodes} VMs per instance.*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-TG 2-node circular topology\
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 for L2\
+| ... | switching of IPv4. Dot1q-IPv4-UDP-VXLAN-Eth-IPv4 is applied on link\
+| ... | between DUT1 and TG.
+| ... | *[Cfg] DUT configuration:* DUT1 is configured with L2 bridge-\
+| ... | domain and MAC learning enabled. Qemu VNFs are connected\
+| ... | to VPP via vhost-user interfaces. Guest is running testpmd l2xc\
+| ... | interconnecting vhost-user interfaces, rxd/txd=1024. DUT1 is\
+| ... | tested with ${nic_name}.
+| ... | *[Ver] TG verification:* TG finds and throughput NDR (Non Drop\
+| ... | Rate) with zero packet loss tolerance, then measured loss at this load\
+| ... | while additional chain is configured.\
+| ... | Test packets are generated by TG on links to DUTs. TG traffic profile\
+| ... | contains two L3 flow-groups (flow-group per direction, 256 flows per\
+| ... | flow-group) with all packets containing Ethernet header with .1Q, IPv4\
+| ... | header, UPD header, VXLAN header and static payload. MAC addresses are\
+| ... | matching MAC addresses of the TG node interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544, RFC7348.
+
+*** Variables ***
+| @{plugins_to_enable}= | dpdk_plugin.so
+| ${osi_layer}= | L3
+| ${nic_name}= | Intel-X710
+| ${overhead}= | ${54}
+| ${nf_dtcr}= | ${1}
+| ${nf_dtc}= | ${1}
+| ${nf_chains}= | ${8}
+| ${nf_added_chains}= | ${1}
+| ${nf_nodes}= | ${1}
+# Traffic profile:
+| ${traffic_profile}=
+| ... | trex-sl-dot1qip4vxlan-ip4src${nf_chains}udpsrcrnd
+
+*** Keywords ***
+| Local Template
+| | [Documentation]
+| | ... | [Cfg] DUT runs Dot1Q-IP4-Vxlan L2BD switching config.\
+| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
+| | ... | [Ver] Measure packet loss during reconfig at NDR load.\
+| | ...
+| | ... | *Arguments:*
+| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
+| | ... | Type: integer, string
+| | ... | - phy_cores - Number of worker threads to be used. Type: integer
+| | ... | - rxq - Number of Rx queues to be used. Type: integer
+| | ...
+| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
+| | ...
+| | Set Test Variable | \${frame_size}
+| | ...
+| | ${nf_total_chains}= | Evaluate | ${nf_chains} + ${nf_added_chains}
+| | Given Add worker threads and rxqueues to all DUTs | ${phy_cores} | ${rxq}
+| | And Add PCI devices to all DUTs
+| | And Set Max Rate And Jumbo And Handle Multi Seg
+| | And Apply startup configuration on all VPP DUTs
+| | When Initialize layer interface
+| | ... | count=${nf_total_chains}
+| | And Initialize layer dot1q
+| | ... | count=${nf_chains} | vlan_per_chain=${False}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_chains}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes}
+| | And Configure chains of NFs connected via vhost-user
+| | ... | nf_chains=${nf_chains} | nf_nodes=${nf_nodes} | jumbo=${jumbo}
+| | ... | use_tuned_cfs=${False} | auto_scale=${False} | vnf=testpmd_io
+| | ${bidirectional_throughput}= | Find Throughput Using MLRsearch
+| | ${unidirectional_throughput}= | Evaluate | ${bidirectional_throughput} / 2.0
+| | Start Traffic on Background | ${unidirectional_throughput}pps
+| | And Initialize layer dot1q
+| | ... | count=${nf_total_chains} | vlan_per_chain=${False}
+| | ... | start=${nf_chains+1}
+| | And Initialize layer ip4vxlan
+| | ... | count=${nf_total_chains} | start=${nf_chains+1}
+| | And Initialize L2 bridge domains for multiple chains with Vhost-User
+| | ... | nf_chains=${nf_total_chains} | nf_nodes=${nf_nodes}
+| | ... | start=${nf_chains+1}
+| | ${result}= | Stop Running Traffic
+| | Display Reconfig Test Message | ${result}
+
+*** Test Cases ***
+| tc01-118B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 118B | 1C
+| | frame_size=${118} | phy_cores=${1}
+
+| tc02-118B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 118B | 2C
+| | frame_size=${118} | phy_cores=${2}
+
+| tc03-118B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 118B | 4C
+| | frame_size=${118} | phy_cores=${4}
+
+| tc04-1518B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 1518B | 1C
+| | frame_size=${1518} | phy_cores=${1}
+
+| tc05-1518B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 1518B | 2C
+| | frame_size=${1518} | phy_cores=${2}
+
+| tc06-1518B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 1518B | 4C
+| | frame_size=${1518} | phy_cores=${4}
+
+| tc07-9000B-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 9000B | 1C
+| | frame_size=${9000} | phy_cores=${1}
+
+| tc08-9000B-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 9000B | 2C
+| | frame_size=${9000} | phy_cores=${2}
+
+| tc09-9000B-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | 9000B | 4C
+| | frame_size=${9000} | phy_cores=${4}
+
+| tc10-IMIX-1c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | IMIX | 1C
+| | frame_size=IMIX_v4_1 | phy_cores=${1}
+
+| tc11-IMIX-2c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | IMIX | 2C
+| | frame_size=IMIX_v4_1 | phy_cores=${2}
+
+| tc12-IMIX-4c-dot1qip4vxlan-l2bd-8ch-1ach-16vh-8vm2t-testpmd-reconf
+| | [Tags] | IMIX | 4C
+| | frame_size=IMIX_v4_1 | phy_cores=${4}
-- 
2.16.6