Tolerate failures when setting MTU

[csit.git] / resources / libraries / python / InterfaceUtil.py

diff --git a/resources/libraries/python/InterfaceUtil.py b/resources/libraries/python/InterfaceUtil.py
index df45e39..7144e0a 100644 (file)
--- a/resources/libraries/python/InterfaceUtil.py
+++ b/resources/libraries/python/InterfaceUtil.py
@@ -13,30 +13,87 @@
 
 """Interface util library."""
 
 
 """Interface util library."""
 

-from time import time, sleep
+from socket import AF_INET, AF_INET6, inet_ntop
+from time import sleep

 
 

+from enum import IntEnum
+from ipaddress import ip_address

 from robot.api import logger
 
 from robot.api import logger
 

+from resources.libraries.python.Constants import Constants

 from resources.libraries.python.CpuUtils import CpuUtils
 from resources.libraries.python.DUTSetup import DUTSetup
 from resources.libraries.python.CpuUtils import CpuUtils
 from resources.libraries.python.DUTSetup import DUTSetup

+from resources.libraries.python.L2Util import L2Util

 from resources.libraries.python.PapiExecutor import PapiExecutor
 from resources.libraries.python.PapiExecutor import PapiExecutor

-from resources.libraries.python.IPUtil import convert_ipv4_netmask_prefix
-from resources.libraries.python.IPUtil import IPUtil

 from resources.libraries.python.parsers.JsonParser import JsonParser
 from resources.libraries.python.ssh import SSH, exec_cmd_no_error
 from resources.libraries.python.topology import NodeType, Topology
 from resources.libraries.python.parsers.JsonParser import JsonParser
 from resources.libraries.python.ssh import SSH, exec_cmd_no_error
 from resources.libraries.python.topology import NodeType, Topology

-from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
-from resources.libraries.python.VatJsonUtil import VatJsonUtil

 from resources.libraries.python.VPPUtil import VPPUtil
 
 
 from resources.libraries.python.VPPUtil import VPPUtil
 
 

+class LinkBondLoadBalance(IntEnum):
+    """Link bonding load balance."""
+    L2 = 0
+    L34 = 1
+    L23 = 2
+
+
+class LinkBondMode(IntEnum):
+    """Link bonding load balance."""
+    ROUND_ROBIN = 1
+    ACTIVE_BACKUP = 2
+    XOR = 3
+    BROADCAST = 4
+    LACP = 5
+
+

 class InterfaceUtil(object):
     """General utilities for managing interfaces"""
 
     __UDEV_IF_RULES_FILE = '/etc/udev/rules.d/10-network.rules'
 
     @staticmethod
 class InterfaceUtil(object):
     """General utilities for managing interfaces"""
 
     __UDEV_IF_RULES_FILE = '/etc/udev/rules.d/10-network.rules'
 
     @staticmethod

-    def set_interface_state(node, interface, state, if_type="key"):
+    def pci_to_int(pci_str):
+        """Convert PCI address from string format (0000:18:0a.0) to
+        integer representation (169345024).
+
+        :param pci_str: PCI address in string representation.
+        :type pci_str: str
+        :returns: Integer representation of PCI address.
+        :rtype: int
+        """
+        pci = list(pci_str.split(':')[0:2])
+        pci.extend(pci_str.split(':')[2].split('.'))
+
+        return (int(pci[0], 16) | int(pci[1], 16) << 16 |
+                int(pci[2], 16) << 24 | int(pci[3], 16) << 29)
+
+    @staticmethod
+    def get_interface_index(node, interface):
+        """Get interface sw_if_index from topology file.
+
+        :param node: Node where the interface is.
+        :param interface: Numeric index or name string of a specific interface.
+        :type node: dict
+        :type interface: str or int
+        :returns: SW interface index.
+        :rtype: int
+        """
+        try:
+            sw_if_index = int(interface)
+        except ValueError:
+            sw_if_index = Topology.get_interface_sw_index(node, interface)
+            if sw_if_index is None:
+                sw_if_index = \
+                    Topology.get_interface_sw_index_by_name(node, interface)
+        except TypeError as err:
+            raise TypeError('Wrong interface format {ifc}: {err}'.format(
+                ifc=interface, err=err.message))
+
+        return sw_if_index
+
+    @staticmethod
+    def set_interface_state(node, interface, state, if_type='key'):

         """Set interface state on a node.
 
         Function can be used for DUTs as well as for TGs.
         """Set interface state on a node.
 
         Function can be used for DUTs as well as for TGs.


@@ -54,32 +111,39 @@ class InterfaceUtil(object):
         :raises ValueError: If the state of interface is unexpected.
         :raises ValueError: If the node has an unknown node type.
         """
         :raises ValueError: If the state of interface is unexpected.
         :raises ValueError: If the node has an unknown node type.
         """

-
-        if if_type == "key":
+        if if_type == 'key':

             if isinstance(interface, basestring):
                 sw_if_index = Topology.get_interface_sw_index(node, interface)
                 iface_name = Topology.get_interface_name(node, interface)
             else:
                 sw_if_index = interface
             if isinstance(interface, basestring):
                 sw_if_index = Topology.get_interface_sw_index(node, interface)
                 iface_name = Topology.get_interface_name(node, interface)
             else:
                 sw_if_index = interface

-        elif if_type == "name":
+        elif if_type == 'name':

             iface_key = Topology.get_interface_by_name(node, interface)
             if iface_key is not None:
                 sw_if_index = Topology.get_interface_sw_index(node, iface_key)
             iface_name = interface
         else:
             iface_key = Topology.get_interface_by_name(node, interface)
             if iface_key is not None:
                 sw_if_index = Topology.get_interface_sw_index(node, iface_key)
             iface_name = interface
         else:

-            raise ValueError("if_type unknown: {}".format(if_type))
+            raise ValueError('Unknown if_type: {type}'.format(type=if_type))

 
         if node['type'] == NodeType.DUT:
             if state == 'up':
 
         if node['type'] == NodeType.DUT:
             if state == 'up':

-                state = 'admin-up link-up'
+                admin_up_down = 1

             elif state == 'down':
             elif state == 'down':

-                state = 'admin-down link-down'
+                admin_up_down = 0

             else:
             else:

-                raise ValueError('Unexpected interface state: {}'.format(state))
-            VatExecutor.cmd_from_template(node, 'set_if_state.vat',
-                                          sw_if_index=sw_if_index, state=state)
+                raise ValueError('Unexpected interface state: {state}'.format(
+                    state=state))
+            cmd = 'sw_interface_set_flags'
+            err_msg = 'Failed to set interface state on host {host}'.format(
+                host=node['host'])
+            args = dict(sw_if_index=sw_if_index,
+                        admin_up_down=admin_up_down)
+            with PapiExecutor(node) as papi_exec:
+                papi_exec.add(cmd, **args).get_replies(err_msg).\
+                    verify_reply(err_msg=err_msg)

         elif node['type'] == NodeType.TG or node['type'] == NodeType.VM:
         elif node['type'] == NodeType.TG or node['type'] == NodeType.VM:

-            cmd = 'ip link set {} {}'.format(iface_name, state)
+            cmd = 'ip link set {ifc} {state}'.format(
+                ifc=iface_name, state=state)

             exec_cmd_no_error(node, cmd, sudo=True)
         else:
             raise ValueError('Node {} has unknown NodeType: "{}"'
             exec_cmd_no_error(node, cmd, sudo=True)
         else:
             raise ValueError('Node {} has unknown NodeType: "{}"'


@@ -141,11 +205,19 @@ class InterfaceUtil(object):
         else:
             sw_if_index = interface
 
         else:
             sw_if_index = interface
 

-        if sw_if_index:
-            with VatTerminal(node, json_param=False) as vat:
-                vat.vat_terminal_exec_cmd_from_template(
-                    "hw_interface_set_mtu.vat", sw_if_index=sw_if_index,
-                    mtu=mtu)
+        cmd = 'hw_interface_set_mtu'
+        err_msg = 'Failed to set interface MTU on host {host}'.format(
+            host=node['host'])
+        args = dict(sw_if_index=sw_if_index,
+                    mtu=int(mtu))
+        try:
+            with PapiExecutor(node) as papi_exec:
+                papi_exec.add(cmd, **args).get_replies(err_msg).\
+                    verify_reply(err_msg=err_msg)
+        except AssertionError as err:
+            # TODO: Make failure tolerance optional.
+            logger.debug("Setting MTU failed. Expected?\n{err}".format(
+                err=err))

 
     @staticmethod
     def vpp_set_interfaces_mtu_on_node(node, mtu=9200):
 
     @staticmethod
     def vpp_set_interfaces_mtu_on_node(node, mtu=9200):


@@ -173,74 +245,57 @@ class InterfaceUtil(object):
                 InterfaceUtil.vpp_set_interfaces_mtu_on_node(node, mtu)
 
     @staticmethod
                 InterfaceUtil.vpp_set_interfaces_mtu_on_node(node, mtu)
 
     @staticmethod

-    def vpp_node_interfaces_ready_wait(node, timeout=30):
+    def vpp_node_interfaces_ready_wait(node, retries=15):

         """Wait until all interfaces with admin-up are in link-up state.
 
         :param node: Node to wait on.
         """Wait until all interfaces with admin-up are in link-up state.
 
         :param node: Node to wait on.

-        :param timeout: Waiting timeout in seconds (optional, default 10s).
+        :param retries: Number of retries to check interface status (optional,
+            default 15).

         :type node: dict
         :type node: dict

-        :type timeout: int
+        :type retries: int

         :returns: Nothing.
         :returns: Nothing.

-        :raises RuntimeError: If the timeout period value has elapsed.
+        :raises RuntimeError: If any interface is not in link-up state after
+            defined number of retries.

         """
         """

-        if_ready = False
-        not_ready = []
-        start = time()
-        while not if_ready:
+        for _ in xrange(0, retries):
+            not_ready = list()

             out = InterfaceUtil.vpp_get_interface_data(node)
             out = InterfaceUtil.vpp_get_interface_data(node)

-            if time() - start > timeout:
-                for interface in out:
-                    if interface.get('admin_up_down') == 1:
-                        if interface.get('link_up_down') != 1:
-                            logger.debug('{0} link-down'.format(
-                                interface.get('interface_name')))
-                raise RuntimeError('timeout, not up {0}'.format(not_ready))
-            not_ready = []

             for interface in out:
                 if interface.get('admin_up_down') == 1:
                     if interface.get('link_up_down') != 1:
                         not_ready.append(interface.get('interface_name'))
             if not not_ready:
             for interface in out:
                 if interface.get('admin_up_down') == 1:
                     if interface.get('link_up_down') != 1:
                         not_ready.append(interface.get('interface_name'))
             if not not_ready:

-                if_ready = True
+                break

             else:
             else:

-                logger.debug('Interfaces still in link-down state: {0}, '
-                             'waiting...'.format(not_ready))
+                logger.debug('Interfaces still in link-down state:\n{ifs} '
+                             '\nWaiting...'.format(ifs=not_ready))

                 sleep(1)
                 sleep(1)

+        else:
+            err = 'Timeout, interfaces not up:\n{ifs}'.format(ifs=not_ready) \
+                if 'not_ready' in locals() else 'No check executed!'
+            raise RuntimeError(err)

 
     @staticmethod
 
     @staticmethod

-    def vpp_nodes_interfaces_ready_wait(nodes, timeout=30):
-        """Wait until all interfaces with admin-up are in link-up state for
-        listed nodes.
-
-        :param nodes: List of nodes to wait on.
-        :param timeout: Seconds to wait per node for all interfaces to come up.
-        :type nodes: list
-        :type timeout: int
-        :returns: Nothing.
-        """
-        for node in nodes:
-            InterfaceUtil.vpp_node_interfaces_ready_wait(node, timeout)
-
-    @staticmethod
-    def all_vpp_interfaces_ready_wait(nodes, timeout=30):
+    def all_vpp_interfaces_ready_wait(nodes, retries=15):

         """Wait until all interfaces with admin-up are in link-up state for all
         nodes in the topology.
 
         :param nodes: Nodes in the topology.
         """Wait until all interfaces with admin-up are in link-up state for all
         nodes in the topology.
 
         :param nodes: Nodes in the topology.

-        :param timeout: Seconds to wait per node for all interfaces to come up.
+        :param retries: Number of retries to check interface status (optional,
+            default 15).

         :type nodes: dict
         :type nodes: dict

-        :type timeout: int
+        :type retries: int

         :returns: Nothing.
         """
         for node in nodes.values():
             if node['type'] == NodeType.DUT:
         :returns: Nothing.
         """
         for node in nodes.values():
             if node['type'] == NodeType.DUT:

-                InterfaceUtil.vpp_node_interfaces_ready_wait(node, timeout)
+                InterfaceUtil.vpp_node_interfaces_ready_wait(node, retries)

 
     @staticmethod
     def vpp_get_interface_data(node, interface=None):
         """Get all interface data from a VPP node. If a name or
         sw_interface_index is provided, return only data for the matching
 
     @staticmethod
     def vpp_get_interface_data(node, interface=None):
         """Get all interface data from a VPP node. If a name or
         sw_interface_index is provided, return only data for the matching

-        interface.
+        interface(s).

 
         :param node: VPP node to get interface data from.
         :param interface: Numeric index or name string of a specific interface.
 
         :param node: VPP node to get interface data from.
         :param interface: Numeric index or name string of a specific interface.


@@ -252,23 +307,53 @@ class InterfaceUtil(object):
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """

-        with VatTerminal(node) as vat:
-            response = vat.vat_terminal_exec_cmd_from_template(
-                "interface_dump.vat")
-
-        data = response[0]
-

         if interface is not None:
             if isinstance(interface, basestring):
         if interface is not None:
             if isinstance(interface, basestring):

-                param = "interface_name"
+                param = 'interface_name'

             elif isinstance(interface, int):
             elif isinstance(interface, int):

-                param = "sw_if_index"
+                param = 'sw_if_index'

             else:
             else:

-                raise TypeError
-            for data_if in data:
-                if data_if[param] == interface:
-                    return data_if
-            return dict()
+                raise TypeError('Wrong interface format {ifc}'.format(
+                    ifc=interface))
+        else:
+            param = ''
+
+        cmd = 'sw_interface_dump'
+        cmd_reply = 'sw_interface_details'
+        args = dict(name_filter_valid=0,
+                    name_filter='')
+        err_msg = 'Failed to get interface dump on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_dump(err_msg)
+
+        papi_if_dump = papi_resp.reply[0]['api_reply']
+
+        def process_if_dump(if_dump):
+            """Process interface dump.
+
+            :param if_dump: Interface dump.
+            :type if_dump: dict
+            :returns: Processed interface dump.
+            :rtype: dict
+            """
+            if_dump['interface_name'] = if_dump['interface_name'].rstrip('\x00')
+            if_dump['tag'] = if_dump['tag'].rstrip('\x00')
+            if_dump['l2_address'] = L2Util.bin_to_mac(if_dump['l2_address'])
+            if_dump['b_dmac'] = L2Util.bin_to_mac(if_dump['b_dmac'])
+            if_dump['b_smac'] = L2Util.bin_to_mac(if_dump['b_smac'])
+            return if_dump
+
+        data = list() if interface is None else dict()
+        for item in papi_if_dump:
+            if interface is None:
+                data.append(process_if_dump(item[cmd_reply]))
+            elif str(item[cmd_reply].get(param)).rstrip('\x00') == \
+                    str(interface):
+                data = process_if_dump(item[cmd_reply])
+                break
+
+        logger.debug('Interface data:\n{if_data}'.format(if_data=data))

         return data
 
     @staticmethod
         return data
 
     @staticmethod


@@ -283,19 +368,31 @@ class InterfaceUtil(object):
         :returns: Name of the given interface.
         :rtype: str
         """
         :returns: Name of the given interface.
         :rtype: str
         """

-

         if_data = InterfaceUtil.vpp_get_interface_data(node, sw_if_index)
         if if_data['sup_sw_if_index'] != if_data['sw_if_index']:
             if_data = InterfaceUtil.vpp_get_interface_data(
                 node, if_data['sup_sw_if_index'])
         if_data = InterfaceUtil.vpp_get_interface_data(node, sw_if_index)
         if if_data['sup_sw_if_index'] != if_data['sw_if_index']:
             if_data = InterfaceUtil.vpp_get_interface_data(
                 node, if_data['sup_sw_if_index'])

-        try:
-            if_name = if_data["interface_name"]
-        except KeyError:
-            if_name = None
-        return if_name
+
+        return if_data.get('interface_name')

 
     @staticmethod
 
     @staticmethod

-    def vpp_get_interface_mac(node, interface=None):
+    def vpp_get_interface_sw_index(node, interface_name):
+        """Get interface name for the given SW interface index from actual
+        interface dump.
+
+        :param node: VPP node to get interface data from.
+        :param interface_name: Interface name.
+        :type node: dict
+        :type interface_name: str
+        :returns: Name of the given interface.
+        :rtype: str
+        """
+        if_data = InterfaceUtil.vpp_get_interface_data(node, interface_name)
+
+        return if_data.get('sw_if_index')
+
+    @staticmethod
+    def vpp_get_interface_mac(node, interface):

         """Get MAC address for the given interface from actual interface dump.
 
         :param node: VPP node to get interface data from.
         """Get MAC address for the given interface from actual interface dump.
 
         :param node: VPP node to get interface data from.


@@ -305,57 +402,12 @@ class InterfaceUtil(object):
         :returns: MAC address.
         :rtype: str
         """
         :returns: MAC address.
         :rtype: str
         """

-

         if_data = InterfaceUtil.vpp_get_interface_data(node, interface)
         if if_data['sup_sw_if_index'] != if_data['sw_if_index']:
             if_data = InterfaceUtil.vpp_get_interface_data(
                 node, if_data['sup_sw_if_index'])
         if_data = InterfaceUtil.vpp_get_interface_data(node, interface)
         if if_data['sup_sw_if_index'] != if_data['sw_if_index']:
             if_data = InterfaceUtil.vpp_get_interface_data(
                 node, if_data['sup_sw_if_index'])

-        mac_data = [str(hex(item))[2:] for item in if_data['l2_address'][:6]]
-        mac_data_nice = []
-        for item in mac_data:
-            if len(item) == 1:
-                item = '0' + item
-            mac_data_nice.append(item)
-        mac = ":".join(mac_data_nice)
-        return mac
-
-    @staticmethod
-    def vpp_get_interface_ip_addresses(node, interface, ip_version):
-        """Get list of IP addresses from an interface on a VPP node.
-
-         :param node: VPP node to get data from.
-         :param interface: Name of an interface on the VPP node.
-         :param ip_version: IP protocol version (ipv4 or ipv6).
-         :type node: dict
-         :type interface: str
-         :type ip_version: str
-         :returns: List of dictionaries, each containing IP address, subnet
-            prefix length and also the subnet mask for ipv4 addresses.
-            Note: A single interface may have multiple IP addresses assigned.
-         :rtype: list
-        """
-
-        try:
-            sw_if_index = Topology.convert_interface_reference(
-                node, interface, "sw_if_index")
-        except RuntimeError:
-            if isinstance(interface, basestring):
-                sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
-            else:
-                raise

 
 

-        with VatTerminal(node) as vat:
-            response = vat.vat_terminal_exec_cmd_from_template(
-                "ip_address_dump.vat", ip_version=ip_version,
-                sw_if_index=sw_if_index)
-
-        data = response[0]
-
-        if ip_version == "ipv4":
-            for item in data:
-                item["netmask"] = convert_ipv4_netmask_prefix(
-                    item["prefix_length"])
-        return data
+        return if_data.get('l2_address')

 
     @staticmethod
     def tg_set_interface_driver(node, pci_addr, driver):
 
     @staticmethod
     def tg_set_interface_driver(node, pci_addr, driver):


@@ -466,18 +518,30 @@ class InterfaceUtil(object):
 
         Updates interface names, software if index numbers and any other details
         generated specifically by vpp that are unknown before testcase run.
 
         Updates interface names, software if index numbers and any other details
         generated specifically by vpp that are unknown before testcase run.

-        It does this by dumping interface list to JSON output from all
-        devices using vpp_api_test, and pairing known information from topology
-        (mac address/pci address of interface) to state from VPP.
+        It does this by dumping interface list from all devices using python
+        api, and pairing known information from topology (mac address) to state
+        from VPP.

 
         :param node: Node selected from DICT__nodes.
         :type node: dict
         """
 
         :param node: Node selected from DICT__nodes.
         :type node: dict
         """

-        vat_executor = VatExecutor()
-        vat_executor.execute_script_json_out("dump_interfaces.vat", node)
-        interface_dump_json = vat_executor.get_script_stdout()
-        VatJsonUtil.update_vpp_interface_data_from_json(node,
-                                                        interface_dump_json)
+        interface_list = InterfaceUtil.vpp_get_interface_data(node)
+        interface_dict = dict()
+        for ifc in interface_list:
+            interface_dict[ifc['l2_address']] = ifc
+
+        for if_name, if_data in node['interfaces'].items():
+            ifc_dict = interface_dict.get(if_data['mac_address'])
+            if ifc_dict is not None:
+                if_data['name'] = ifc_dict['interface_name']
+                if_data['vpp_sw_index'] = ifc_dict['sw_if_index']
+                if_data['mtu'] = ifc_dict['mtu'][0]
+                logger.trace('Interface {ifc} found by MAC {mac}'.format(
+                    ifc=if_name, mac=if_data['mac_address']))
+            else:
+                logger.trace('Interface {ifc} not found by MAC {mac}'.format(
+                    ifc=if_name, mac=if_data['mac_address']))
+                if_data['vpp_sw_index'] = None

 
     @staticmethod
     def update_nic_interface_names(node):
 
     @staticmethod
     def update_nic_interface_names(node):


@@ -650,7 +714,7 @@ class InterfaceUtil(object):
 
     @staticmethod
     def create_vlan_subinterface(node, interface, vlan):
 
     @staticmethod
     def create_vlan_subinterface(node, interface, vlan):

-        """Create VLAN subinterface on node.
+        """Create VLAN sub-interface on node.

 
         :param node: Node to add VLAN subinterface on.
         :param interface: Interface name on which create VLAN subinterface.
 
         :param node: Node to add VLAN subinterface on.
         :param interface: Interface name on which create VLAN subinterface.


@@ -666,34 +730,27 @@ class InterfaceUtil(object):
         iface_key = Topology.get_interface_by_name(node, interface)
         sw_if_index = Topology.get_interface_sw_index(node, iface_key)
 
         iface_key = Topology.get_interface_by_name(node, interface)
         sw_if_index = Topology.get_interface_sw_index(node, iface_key)
 

-        output = VatExecutor.cmd_from_template(node, "create_vlan_subif.vat",
-                                               sw_if_index=sw_if_index,
-                                               vlan=vlan)
-        if output[0]["retval"] == 0:
-            sw_vlan_idx = output[0]["sw_if_index"]
-            logger.trace('VLAN subinterface with sw_if_index {} and VLAN ID {} '
-                         'created on node {}'.format(sw_vlan_idx,
-                                                     vlan, node['host']))
-            if_key = Topology.add_new_port(node, "vlan_subif")
-            Topology.update_interface_sw_if_index(node, if_key, sw_vlan_idx)
-            ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_vlan_idx)
-            Topology.update_interface_name(node, if_key, ifc_name)
-        else:
-            raise RuntimeError('Unable to create VLAN subinterface on node {}'
-                               .format(node['host']))
+        cmd = 'create_vlan_subif'
+        args = dict(sw_if_index=sw_if_index,
+                    vlan_id=int(vlan))
+        err_msg = 'Failed to create VLAN sub-interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
 

-        with VatTerminal(node, False) as vat:
-            vat.vat_terminal_exec_cmd('exec show interfaces')
+        sw_if_idx = papi_resp['sw_if_index']
+        if_key = Topology.add_new_port(node, 'vlan_subif')
+        Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
+        Topology.update_interface_name(node, if_key, ifc_name)

 
 

-        return '{}.{}'.format(interface, vlan), sw_vlan_idx
+        return '{ifc}.{vlan}'.format(ifc=interface, vlan=vlan), sw_if_idx

 
     @staticmethod
     def create_vxlan_interface(node, vni, source_ip, destination_ip):
         """Create VXLAN interface and return sw if index of created interface.
 
 
     @staticmethod
     def create_vxlan_interface(node, vni, source_ip, destination_ip):
         """Create VXLAN interface and return sw if index of created interface.
 

-        Executes "vxlan_add_del_tunnel src {src} dst {dst} vni {vni}" VAT
-        command on the node.
-

         :param node: Node where to create VXLAN interface.
         :param vni: VXLAN Network Identifier.
         :param source_ip: Source IP of a VXLAN Tunnel End Point.
         :param node: Node where to create VXLAN interface.
         :param vni: VXLAN Network Identifier.
         :param source_ip: Source IP of a VXLAN Tunnel End Point.


@@ -707,22 +764,32 @@ class InterfaceUtil(object):
         :raises RuntimeError: if it is unable to create VxLAN interface on the
             node.
         """
         :raises RuntimeError: if it is unable to create VxLAN interface on the
             node.
         """

-        output = VatExecutor.cmd_from_template(node, "vxlan_create.vat",
-                                               src=source_ip,
-                                               dst=destination_ip,
-                                               vni=vni)
-        output = output[0]
-
-        if output["retval"] == 0:
-            sw_if_idx = output["sw_if_index"]
-            if_key = Topology.add_new_port(node, "vxlan_tunnel")
-            Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
-            ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
-            Topology.update_interface_name(node, if_key, ifc_name)
-            return sw_if_idx
-        else:
-            raise RuntimeError("Unable to create VXLAN interface on node {0}"
-                               .format(node))
+        src_address = ip_address(unicode(source_ip))
+        dst_address = ip_address(unicode(destination_ip))
+
+        cmd = 'vxlan_add_del_tunnel'
+        args = dict(is_add=1,
+                    is_ipv6=1 if src_address.version == 6 else 0,
+                    instance=Constants.BITWISE_NON_ZERO,
+                    src_address=src_address.packed,
+                    dst_address=dst_address.packed,
+                    mcast_sw_if_index=Constants.BITWISE_NON_ZERO,
+                    encap_vrf_id=0,
+                    decap_next_index=Constants.BITWISE_NON_ZERO,
+                    vni=int(vni))
+        err_msg = 'Failed to create VXLAN tunnel interface on host {host}'.\
+            format(host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+
+        sw_if_idx = papi_resp['sw_if_index']
+        if_key = Topology.add_new_port(node, 'vxlan_tunnel')
+        Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
+        Topology.update_interface_name(node, if_key, ifc_name)
+
+        return sw_if_idx

 
     @staticmethod
     def vxlan_dump(node, interface=None):
 
     @staticmethod
     def vxlan_dump(node, interface=None):


@@ -739,48 +806,100 @@ class InterfaceUtil(object):
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """

-        param = "sw_if_index"
-        if interface is None:
-            param = ''
-            sw_if_index = ''
-        elif isinstance(interface, basestring):
-            sw_if_index = Topology.get_interface_sw_index(node, interface)
-        elif isinstance(interface, int):
-            sw_if_index = interface
+        if interface is not None:
+            sw_if_index = InterfaceUtil.get_interface_index(node, interface)

         else:
         else:

-            raise TypeError("Wrong interface format {0}".format(interface))
+            sw_if_index = int(Constants.BITWISE_NON_ZERO)

 
 

-        with VatTerminal(node) as vat:
-            response = vat.vat_terminal_exec_cmd_from_template(
-                "vxlan_dump.vat", param=param, sw_if_index=sw_if_index)
+        cmd = 'vxlan_tunnel_dump'
+        cmd_reply = 'vxlan_tunnel_details'
+        args = dict(sw_if_index=sw_if_index)
+        err_msg = 'Failed to get VXLAN dump on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_dump(err_msg)
+
+        papi_vxlan_dump = papi_resp.reply[0]['api_reply']
+
+        def process_vxlan_dump(vxlan_dump):
+            """Process vxlan dump.
+
+            :param vxlan_dump: Vxlan interface dump.
+            :type vxlan_dump: dict
+            :returns: Processed vxlan interface dump.
+            :rtype: dict
+            """
+            if vxlan_dump['is_ipv6']:
+                vxlan_dump['src_address'] = \
+                    inet_ntop(AF_INET6, vxlan_dump['src_address'])
+                vxlan_dump['dst_address'] = \
+                    inet_ntop(AF_INET6, vxlan_dump['dst_address'])
+            else:
+                vxlan_dump['src_address'] = \
+                    inet_ntop(AF_INET, vxlan_dump['src_address'][0:4])
+                vxlan_dump['dst_address'] = \
+                    inet_ntop(AF_INET, vxlan_dump['dst_address'][0:4])
+            return vxlan_dump
+
+        data = list() if interface is None else dict()
+        for item in papi_vxlan_dump:
+            if interface is None:
+                data.append(process_vxlan_dump(item[cmd_reply]))
+            elif item[cmd_reply]['sw_if_index'] == sw_if_index:
+                data = process_vxlan_dump(item[cmd_reply])
+                break

 
 

-        if sw_if_index:
-            for vxlan in response[0]:
-                if vxlan["sw_if_index"] == sw_if_index:
-                    return vxlan
-            return {}
-        return response[0]
+        logger.debug('VXLAN data:\n{vxlan_data}'.format(vxlan_data=data))
+        return data

 
     @staticmethod
     def vhost_user_dump(node):
         """Get vhost-user data for the given node.
 
 
     @staticmethod
     def vhost_user_dump(node):
         """Get vhost-user data for the given node.
 

+        TODO: Move to VhostUser.py
+

         :param node: VPP node to get interface data from.
         :type node: dict
         :returns: List of dictionaries with all vhost-user interfaces.
         :rtype: list
         """
         :param node: VPP node to get interface data from.
         :type node: dict
         :returns: List of dictionaries with all vhost-user interfaces.
         :rtype: list
         """

-        with VatTerminal(node) as vat:
-            response = vat.vat_terminal_exec_cmd_from_template(
-                "vhost_user_dump.vat")
+        cmd = 'sw_interface_vhost_user_dump'
+        cmd_reply = 'sw_interface_vhost_user_details'
+        err_msg = 'Failed to get vhost-user dump on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd).get_dump(err_msg)
+
+        papi_vxlan_dump = papi_resp.reply[0]['api_reply']
+
+        def process_vhost_dump(vhost_dump):
+            """Process vhost dump.

 
 

-        return response[0]
+            :param vhost_dump: Vhost interface dump.
+            :type vhost_dump: dict
+            :returns: Processed vhost interface dump.
+            :rtype: dict
+            """
+            vhost_dump['interface_name'] = \
+                vhost_dump['interface_name'].rstrip('\x00')
+            vhost_dump['sock_filename'] = \
+                vhost_dump['sock_filename'].rstrip('\x00')
+            return vhost_dump
+
+        data = list()
+        for item in papi_vxlan_dump:
+            data.append(process_vhost_dump(item[cmd_reply]))
+
+        logger.debug('Vhost-user data:\n{vhost_data}'.format(vhost_data=data))
+        return data

 
     @staticmethod
     def tap_dump(node, name=None):
         """Get all TAP interface data from the given node, or data about
         a specific TAP interface.
 
 
     @staticmethod
     def tap_dump(node, name=None):
         """Get all TAP interface data from the given node, or data about
         a specific TAP interface.
 

+        TODO: Move to Tap.py
+

         :param node: VPP node to get data from.
         :param name: Optional name of a specific TAP interface.
         :type node: dict
         :param node: VPP node to get data from.
         :param name: Optional name of a specific TAP interface.
         :type node: dict


@@ -789,15 +908,45 @@ class InterfaceUtil(object):
             a List of dictionaries containing all TAP data for the given node.
         :rtype: dict or list
         """
             a List of dictionaries containing all TAP data for the given node.
         :rtype: dict or list
         """

-        with VatTerminal(node) as vat:
-            response = vat.vat_terminal_exec_cmd_from_template(
-                "tap_dump.vat")
-        if name is None:
-            return response[0]
-        for item in response[0]:
-            if name == item['dev_name']:
-                return item
-        return {}
+        cmd = 'sw_interface_tap_v2_dump'
+        cmd_reply = 'sw_interface_tap_v2_details'
+        err_msg = 'Failed to get TAP dump on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd).get_dump(err_msg)
+
+        papi_tap_dump = papi_resp.reply[0]['api_reply']
+
+        def process_tap_dump(tap_dump):
+            """Process tap dump.
+
+            :param tap_dump: Tap interface dump.
+            :type tap_dump: dict
+            :returns: Processed tap interface dump.
+            :rtype: dict
+            """
+            tap_dump['dev_name'] = tap_dump['dev_name'].rstrip('\x00')
+            tap_dump['host_if_name'] = tap_dump['host_if_name'].rstrip('\x00')
+            tap_dump['host_namespace'] = \
+                tap_dump['host_namespace'].rstrip('\x00')
+            tap_dump['host_mac_addr'] = \
+                L2Util.bin_to_mac(tap_dump['host_mac_addr'])
+            tap_dump['host_ip4_addr'] = \
+                inet_ntop(AF_INET, tap_dump['host_ip4_addr'])
+            tap_dump['host_ip6_addr'] = \
+                inet_ntop(AF_INET6, tap_dump['host_ip6_addr'])
+            return tap_dump
+
+        data = list() if name is None else dict()
+        for item in papi_tap_dump:
+            if name is None:
+                data.append(process_tap_dump(item[cmd_reply]))
+            elif item[cmd_reply].get('dev_name').rstrip('\x00') == name:
+                data = process_tap_dump(item[cmd_reply])
+                break
+
+        logger.debug('TAP data:\n{tap_data}'.format(tap_data=data))
+        return data

 
     @staticmethod
     def create_subinterface(node, interface, sub_id, outer_vlan_id=None,
 
     @staticmethod
     def create_subinterface(node, interface, sub_id, outer_vlan_id=None,


@@ -823,46 +972,35 @@ class InterfaceUtil(object):
         :rtype: tuple
         :raises RuntimeError: If it is not possible to create sub-interface.
         """
         :rtype: tuple
         :raises RuntimeError: If it is not possible to create sub-interface.
         """

+        subif_types = type_subif.split()
+
+        cmd = 'create_subif'
+        args = dict(
+            sw_if_index=InterfaceUtil.get_interface_index(node, interface),
+            sub_id=int(sub_id),
+            no_tags=1 if 'no_tags' in subif_types else 0,
+            one_tag=1 if 'one_tag' in subif_types else 0,
+            two_tags=1 if 'two_tags' in subif_types else 0,
+            dot1ad=1 if 'dot1ad' in subif_types else 0,
+            exact_match=1 if 'exact_match' in subif_types else 0,
+            default_sub=1 if 'default_sub' in subif_types else 0,
+            outer_vlan_id_any=1 if type_subif == 'default_sub' else 0,
+            inner_vlan_id_any=1 if type_subif == 'default_sub' else 0,
+            outer_vlan_id=int(outer_vlan_id) if outer_vlan_id else 0,
+            inner_vlan_id=int(inner_vlan_id) if inner_vlan_id else 0)
+        err_msg = 'Failed to create sub-interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
 

-        outer_vlan_id = 'outer_vlan_id {0}'.format(outer_vlan_id)\
-            if outer_vlan_id else ''
-
-        inner_vlan_id = 'inner_vlan_id {0}'.format(inner_vlan_id)\
-            if inner_vlan_id else ''
-
-        if type_subif is None:
-            type_subif = ''
-
-        if isinstance(interface, basestring):
-            iface_key = Topology.get_interface_by_name(node, interface)
-            sw_if_index = Topology.get_interface_sw_index(node, iface_key)
-        else:
-            sw_if_index = interface
-
-        output = VatExecutor.cmd_from_template(node, "create_sub_interface.vat",
-                                               sw_if_index=sw_if_index,
-                                               sub_id=sub_id,
-                                               outer_vlan_id=outer_vlan_id,
-                                               inner_vlan_id=inner_vlan_id,
-                                               type_subif=type_subif)
-
-        if output[0]["retval"] == 0:
-            sw_vlan_idx = output[0]["sw_if_index"]
-            logger.trace('Created subinterface with index {}'
-                         .format(sw_vlan_idx))
-            if_key = Topology.add_new_port(node, "subinterface")
-            Topology.update_interface_sw_if_index(node, if_key, sw_vlan_idx)
-            ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_vlan_idx)
-            Topology.update_interface_name(node, if_key, ifc_name)
-        else:
-            raise RuntimeError('Unable to create sub-interface on node {}'
-                               .format(node['host']))
-
-        with VatTerminal(node, json_param=False) as vat:
-            vat.vat_terminal_exec_cmd('exec show interfaces')
+        sw_subif_idx = papi_resp['sw_if_index']
+        if_key = Topology.add_new_port(node, 'subinterface')
+        Topology.update_interface_sw_if_index(node, if_key, sw_subif_idx)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_subif_idx)
+        Topology.update_interface_name(node, if_key, ifc_name)

 
 

-        name = '{}.{}'.format(interface, sub_id)
-        return name, sw_vlan_idx
+        return '{ifc}.{s_id}'.format(ifc=interface, s_id=sub_id), sw_subif_idx

 
     @staticmethod
     def create_gre_tunnel_interface(node, source_ip, destination_ip):
 
     @staticmethod
     def create_gre_tunnel_interface(node, source_ip, destination_ip):


@@ -878,28 +1016,28 @@ class InterfaceUtil(object):
         :rtype: tuple
         :raises RuntimeError: If unable to create GRE tunnel interface.
         """
         :rtype: tuple
         :raises RuntimeError: If unable to create GRE tunnel interface.
         """

-        output = VatExecutor.cmd_from_template(node, "create_gre.vat",
-                                               src=source_ip,
-                                               dst=destination_ip)
-        output = output[0]
-
-        if output["retval"] == 0:
-            sw_if_idx = output["sw_if_index"]
-
-            vat_executor = VatExecutor()
-            vat_executor.execute_script_json_out("dump_interfaces.vat", node)
-            interface_dump_json = vat_executor.get_script_stdout()
-            name = VatJsonUtil.get_interface_name_from_json(
-                interface_dump_json, sw_if_idx)
+        cmd = 'gre_tunnel_add_del'
+        tunnel = dict(type=0,
+                      instance=Constants.BITWISE_NON_ZERO,
+                      src=str(source_ip),
+                      dst=str(destination_ip),
+                      outer_fib_id=0,
+                      session_id=0)
+        args = dict(is_add=1,
+                    tunnel=tunnel)
+        err_msg = 'Failed to create GRE tunnel interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
 

-            if_key = Topology.add_new_port(node, "gre_tunnel")
-            Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
-            Topology.update_interface_name(node, if_key, name)
+        sw_if_idx = papi_resp['sw_if_index']
+        if_key = Topology.add_new_port(node, 'gre_tunnel')
+        Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
+        Topology.update_interface_name(node, if_key, ifc_name)

 
 

-            return name, sw_if_idx
-        else:
-            raise RuntimeError('Unable to create GRE tunnel on node {}.'
-                               .format(node))
+        return ifc_name, sw_if_idx

 
     @staticmethod
     def vpp_create_loopback(node):
 
     @staticmethod
     def vpp_create_loopback(node):


@@ -912,17 +1050,21 @@ class InterfaceUtil(object):
         :raises RuntimeError: If it is not possible to create loopback on the
             node.
         """
         :raises RuntimeError: If it is not possible to create loopback on the
             node.
         """

-        out = VatExecutor.cmd_from_template(node, "create_loopback.vat")
-        if out[0].get('retval') == 0:
-            sw_if_idx = out[0].get('sw_if_index')
-            if_key = Topology.add_new_port(node, "loopback")
-            Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
-            ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
-            Topology.update_interface_name(node, if_key, ifc_name)
-            return sw_if_idx
-        else:
-            raise RuntimeError('Create loopback failed on node "{}"'
-                               .format(node['host']))
+        cmd = 'create_loopback'
+        args = dict(mac_address=0)
+        err_msg = 'Failed to create loopback interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+
+        sw_if_idx = papi_resp['sw_if_index']
+        if_key = Topology.add_new_port(node, 'loopback')
+        Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
+        Topology.update_interface_name(node, if_key, ifc_name)
+
+        return sw_if_idx

 
     @staticmethod
     def vpp_create_bond_interface(node, mode, load_balance=None, mac=None):
 
     @staticmethod
     def vpp_create_bond_interface(node, mode, load_balance=None, mac=None):


@@ -942,22 +1084,27 @@ class InterfaceUtil(object):
         :raises RuntimeError: If it is not possible to create bond interface on
             the node.
         """
         :raises RuntimeError: If it is not possible to create bond interface on
             the node.
         """

-        hw_addr = '' if mac is None else 'hw-addr {mac}'.format(mac=mac)
-        ldb = '' if load_balance is None \
-            else 'lb {ldb}'.format(ldb=load_balance)
-
-        output = VatExecutor.cmd_from_template(
-            node, 'create_bond_interface.vat', mode=mode, lb=ldb, mac=hw_addr)
-
-        if output[0].get('retval') == 0:
-            sw_if_idx = output[0].get('sw_if_index')
-            InterfaceUtil.add_eth_interface(node, sw_if_idx=sw_if_idx,
-                                            ifc_pfx='eth_bond')
-            if_key = Topology.get_interface_by_sw_index(node, sw_if_idx)
-            return if_key
-        else:
-            raise RuntimeError('Create bond interface failed on "{host}"'.
-                               format(host=node['host']))
+        cmd = 'bond_create'
+        args = dict(id=int(Constants.BITWISE_NON_ZERO),
+                    use_custom_mac=0 if mac is None else 1,
+                    mac_address=0 if mac is None else L2Util.mac_to_bin(mac),
+                    mode=getattr(LinkBondMode, '{md}'.format(
+                        md=mode.replace('-', '_').upper())).value,
+                    lb=0 if load_balance is None else getattr(
+                        LinkBondLoadBalance, '{lb}'.format(
+                            lb=load_balance.upper())).value)
+        err_msg = 'Failed to create bond interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+
+        sw_if_idx = papi_resp['sw_if_index']
+        InterfaceUtil.add_eth_interface(node, sw_if_idx=sw_if_idx,
+                                        ifc_pfx='eth_bond')
+        if_key = Topology.get_interface_by_sw_index(node, sw_if_idx)
+
+        return if_key

 
     @staticmethod
     def add_eth_interface(node, ifc_name=None, sw_if_idx=None, ifc_pfx=None):
 
     @staticmethod
     def add_eth_interface(node, ifc_name=None, sw_if_idx=None, ifc_pfx=None):


@@ -974,19 +1121,13 @@ class InterfaceUtil(object):
         """
         if_key = Topology.add_new_port(node, ifc_pfx)
 
         """
         if_key = Topology.add_new_port(node, ifc_pfx)
 

-        vat_executor = VatExecutor()
-        vat_executor.execute_script_json_out("dump_interfaces.vat", node)
-        interface_dump_json = vat_executor.get_script_stdout()
-

         if ifc_name and sw_if_idx is None:
         if ifc_name and sw_if_idx is None:

-            sw_if_idx = VatJsonUtil.get_interface_sw_index_from_json(
-                interface_dump_json, ifc_name)
+            sw_if_idx = InterfaceUtil.vpp_get_interface_sw_index(node, ifc_name)

         Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
         if sw_if_idx and ifc_name is None:
             ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
         Topology.update_interface_name(node, if_key, ifc_name)
         Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
         if sw_if_idx and ifc_name is None:
             ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
         Topology.update_interface_name(node, if_key, ifc_name)

-        ifc_mac = VatJsonUtil.get_interface_mac_from_json(
-            interface_dump_json, sw_if_idx)
+        ifc_mac = InterfaceUtil.vpp_get_interface_mac(node, sw_if_idx)

         Topology.update_interface_mac_address(node, if_key, ifc_mac)
 
     @staticmethod
         Topology.update_interface_mac_address(node, if_key, ifc_mac)
 
     @staticmethod


@@ -1004,50 +1145,51 @@ class InterfaceUtil(object):
         :raises RuntimeError: If it is not possible to create AVF interface on
             the node.
         """
         :raises RuntimeError: If it is not possible to create AVF interface on
             the node.
         """

-        num_rx_queues = 'num-rx-queues {num_rx_queues}'\
-            .format(num_rx_queues=num_rx_queues) if num_rx_queues else ''
-
-        with VatTerminal(node, json_param=False) as vat:
-            vat.vat_terminal_exec_cmd_from_template('create_avf_interface.vat',
-                                                    vf_pci_addr=vf_pci_addr,
-                                                    num_rx_queues=num_rx_queues)
-            output = vat.vat_stdout
-
-        if output is not None:
-            sw_if_idx = int(output.split()[4])
-            InterfaceUtil.add_eth_interface(node, sw_if_idx=sw_if_idx,
-                                            ifc_pfx='eth_avf')
-            if_key = Topology.get_interface_by_sw_index(node, sw_if_idx)
-            return if_key
-        else:
-            raise RuntimeError('Create AVF interface failed on {host}'.
-                               format(host=node['host']))
+        cmd = 'avf_create'
+        args = dict(pci_addr=InterfaceUtil.pci_to_int(vf_pci_addr),
+                    enable_elog=0,
+                    rxq_num=int(num_rx_queues) if num_rx_queues else 0,
+                    rxq_size=0,
+                    txq_size=0)
+        err_msg = 'Failed to create AVF interface on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+
+        sw_if_idx = papi_resp['sw_if_index']
+        InterfaceUtil.add_eth_interface(node, sw_if_idx=sw_if_idx,
+                                        ifc_pfx='eth_avf')
+        if_key = Topology.get_interface_by_sw_index(node, sw_if_idx)
+
+        return if_key

 
     @staticmethod
 
     @staticmethod

-    def vpp_enslave_physical_interface(node, interface, bond_interface):
+    def vpp_enslave_physical_interface(node, interface, bond_if):

         """Enslave physical interface to bond interface on VPP node.
 
         :param node: DUT node from topology.
         :param interface: Physical interface key from topology file.
         """Enslave physical interface to bond interface on VPP node.
 
         :param node: DUT node from topology.
         :param interface: Physical interface key from topology file.

-        :param bond_interface: Load balance
+        :param bond_if: Load balance

         :type node: dict
         :type interface: str
         :type node: dict
         :type interface: str

-        :type bond_interface: str
+        :type bond_if: str

         :raises RuntimeError: If it is not possible to enslave physical
             interface to bond interface on the node.
         """
         :raises RuntimeError: If it is not possible to enslave physical
             interface to bond interface on the node.
         """

-        ifc = Topology.get_interface_sw_index(node, interface)
-        bond_ifc = Topology.get_interface_sw_index(node, bond_interface)
-
-        output = VatExecutor.cmd_from_template(
-            node, 'enslave_physical_interface.vat', p_int=ifc, b_int=bond_ifc)
-
-        retval = output[0].get('retval', None)
-        if retval is None or int(retval) != 0:
-            raise RuntimeError('Enslave physical interface {ifc} to bond '
-                               'interface {bond} failed on node "{n}"'
-                               .format(ifc=interface, bond=bond_interface,
-                                       n=node['host']))
+        cmd = 'bond_enslave'
+        args = dict(
+            sw_if_index=Topology.get_interface_sw_index(node, interface),
+            bond_sw_if_index=Topology.get_interface_sw_index(node, bond_if),
+            is_passive=0,
+            is_long_timeout=0)
+        err_msg = 'Failed to enslave physical interface {ifc} to bond ' \
+                  'interface {bond} on host {host}'.format(ifc=interface,
+                                                           bond=bond_if,
+                                                           host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
     @staticmethod
     def vpp_show_bond_data_on_node(node, details=False):
 
     @staticmethod
     def vpp_show_bond_data_on_node(node, details=False):


@@ -1058,9 +1200,86 @@ class InterfaceUtil(object):
         :type node: dict
         :type details: bool
         """
         :type node: dict
         :type details: bool
         """

-        cmd = 'exec show bond details' if details else 'exec show bond'
-        with VatTerminal(node, json_param=False) as vat:
-            vat.vat_terminal_exec_cmd(cmd)
+        cmd = 'sw_interface_bond_dump'
+        cmd_reply = 'sw_interface_bond_details'
+        err_msg = 'Failed to get bond interface dump on host {host}'.format(
+            host=node['host'])
+
+        data = ('Bond data on node {host}:\n'.format(host=node['host']))
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd).get_dump(err_msg)
+
+        papi_dump = papi_resp.reply[0]['api_reply']
+        for item in papi_dump:
+            data += ('{b}\n'.format(b=item[cmd_reply]['interface_name'].
+                                    rstrip('\x00')))
+            data += ('  mode: {m}\n'.
+                     format(m=LinkBondMode(item[cmd_reply]['mode']).name.
+                            lower()))
+            data += ('  load balance: {lb}\n'.
+                     format(lb=LinkBondLoadBalance(item[cmd_reply]['lb']).name.
+                            lower()))
+            data += ('  number of active slaves: {n}\n'.
+                     format(n=item[cmd_reply]['active_slaves']))
+            if details:
+                slave_data = InterfaceUtil.vpp_bond_slave_dump(
+                    node, Topology.get_interface_by_sw_index(
+                        node, item[cmd_reply]['sw_if_index']))
+                for slave in slave_data:
+                    if not slave['is_passive']:
+                        data += ('    {s}\n'.format(s=slave['interface_name']))
+            data += ('  number of slaves: {n}\n'.
+                     format(n=item[cmd_reply]['slaves']))
+            if details:
+                for slave in slave_data:
+                    data += ('    {s}\n'.format(s=slave['interface_name']))
+            data += ('  interface id: {i}\n'.
+                     format(i=item[cmd_reply]['id']))
+            data += ('  sw_if_index: {i}\n'.
+                     format(i=item[cmd_reply]['sw_if_index']))
+        logger.info(data)
+
+    @staticmethod
+    def vpp_bond_slave_dump(node, interface):
+        """Get bond interface slave(s) data on VPP node.
+
+        :param node: DUT node from topology.
+        :param interface: Physical interface key from topology file.
+        :type node: dict
+        :type interface: str
+        :returns: Bond slave interface data.
+        :rtype: dict
+        """
+        cmd = 'sw_interface_slave_dump'
+        cmd_reply = 'sw_interface_slave_details'
+        args = dict(sw_if_index=Topology.get_interface_sw_index(
+            node, interface))
+        err_msg = 'Failed to get slave dump on host {host}'.format(
+            host=node['host'])
+
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_dump(err_msg)
+
+        papi_dump = papi_resp.reply[0]['api_reply']
+
+        def process_slave_dump(slave_dump):
+            """Process slave dump.
+
+            :param slave_dump: Slave interface dump.
+            :type slave_dump: dict
+            :returns: Processed slave interface dump.
+            :rtype: dict
+            """
+            slave_dump['interface_name'] = slave_dump['interface_name'].\
+                rstrip('\x00')
+            return slave_dump
+
+        data = list()
+        for item in papi_dump:
+            data.append(process_slave_dump(item[cmd_reply]))
+
+        logger.debug('Slave data:\n{slave_data}'.format(slave_data=data))
+        return data

 
     @staticmethod
     def vpp_show_bond_data_on_all_nodes(nodes, details=False):
 
     @staticmethod
     def vpp_show_bond_data_on_all_nodes(nodes, details=False):


@@ -1089,21 +1308,28 @@ class InterfaceUtil(object):
         :type ip_version: str
         :type table_index: int
         """
         :type ip_version: str
         :type table_index: int
         """

-        if isinstance(interface, basestring):
-            sw_if_index = Topology.get_interface_sw_index(node, interface)
-        else:
-            sw_if_index = interface
-
-        with VatTerminal(node) as vat:
-            vat.vat_terminal_exec_cmd_from_template("input_acl_int.vat",
-                                                    sw_if_index=sw_if_index,
-                                                    ip_version=ip_version,
-                                                    table_index=table_index)
+        cmd = 'input_acl_set_interface'
+        args = dict(
+            sw_if_index=InterfaceUtil.get_interface_index(node, interface),
+            ip4_table_index=table_index if ip_version == 'ip4'
+            else Constants.BITWISE_NON_ZERO,
+            ip6_table_index=table_index if ip_version == 'ip6'
+            else Constants.BITWISE_NON_ZERO,
+            l2_table_index=table_index if ip_version == 'l2'
+            else Constants.BITWISE_NON_ZERO,
+            is_add=1)
+        err_msg = 'Failed to enable input acl on interface {ifc}'.format(
+            ifc=interface)
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
     @staticmethod
     def get_interface_classify_table(node, interface):
         """Get name of classify table for the given interface.
 
 
     @staticmethod
     def get_interface_classify_table(node, interface):
         """Get name of classify table for the given interface.
 

+        TODO: Move to Classify.py.
+

         :param node: VPP node to get data from.
         :param interface: Name or sw_if_index of a specific interface.
         :type node: dict
         :param node: VPP node to get data from.
         :param interface: Name or sw_if_index of a specific interface.
         :type node: dict


@@ -1116,34 +1342,15 @@ class InterfaceUtil(object):
         else:
             sw_if_index = interface
 
         else:
             sw_if_index = interface
 

-        with VatTerminal(node) as vat:
-            data = vat.vat_terminal_exec_cmd_from_template(
-                "classify_interface_table.vat",
-                sw_if_index=sw_if_index)
-        return data[0]
-
-    @staticmethod
-    def get_interface_vrf_table(node, interface):
-        """Get vrf ID for the given interface.
-
-        :param node: VPP node.
-        :param interface: Name or sw_if_index of a specific interface.
-        :type node: dict
-        :type interface: str or int
-        :returns: vrf ID of the specified interface.
-        :rtype: int
-        """
-
-        if isinstance(interface, basestring):
-            sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
-        else:
-            sw_if_index = interface
+        cmd = 'classify_table_by_interface'
+        args = dict(sw_if_index=sw_if_index)
+        err_msg = 'Failed to get classify table name by interface {ifc}'.format(
+            ifc=interface)
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_replies(err_msg). \
+                verify_reply(err_msg=err_msg)

 
 

-        with VatTerminal(node) as vat:
-            data = vat.vat_terminal_exec_cmd_from_template(
-                "interface_vrf_dump.vat",
-                sw_if_index=sw_if_index)
-        return data[0]["vrf_id"]
+        return papi_resp

 
     @staticmethod
     def get_sw_if_index(node, interface_name):
 
     @staticmethod
     def get_sw_if_index(node, interface_name):


@@ -1156,15 +1363,9 @@ class InterfaceUtil(object):
         :returns: sw_if_index of the given interface.
         :rtype: str
         """
         :returns: sw_if_index of the given interface.
         :rtype: str
         """

-
-        with VatTerminal(node) as vat:
-            if_data = vat.vat_terminal_exec_cmd_from_template(
-                "interface_dump.vat")
-        for interface in if_data[0]:
-            if interface["interface_name"] == interface_name:
-                return interface["sw_if_index"]
-
-        return None
+        interface_data = InterfaceUtil.vpp_get_interface_data(
+            node, interface=interface_name)
+        return interface_data.get('sw_if_index')

 
     @staticmethod
     def vxlan_gpe_dump(node, interface_name=None):
 
     @staticmethod
     def vxlan_gpe_dump(node, interface_name=None):


@@ -1180,52 +1381,53 @@ class InterfaceUtil(object):
             interfaces.
         :rtype: dict or list
         """
             interfaces.
         :rtype: dict or list
         """

-
-        with VatTerminal(node) as vat:
-            vxlan_gpe_data = vat.vat_terminal_exec_cmd_from_template(
-                "vxlan_gpe_dump.vat")
-
-        if interface_name:
-            sw_if_index = InterfaceUtil.get_sw_if_index(node, interface_name)
-            if sw_if_index:
-                for vxlan_gpe in vxlan_gpe_data[0]:
-                    if vxlan_gpe["sw_if_index"] == sw_if_index:
-                        return vxlan_gpe
-            return {}
-
-        return vxlan_gpe_data[0]
-
-    @staticmethod
-    def vpp_proxy_arp_interface_enable(node, interface):
-        """Enable proxy ARP on interface.
-
-        :param node: VPP node to enable proxy ARP on interface.
-        :param interface: Interface to enable proxy ARP.
-        :type node: dict
-        :type interface: str or int
-        """
-        if isinstance(interface, basestring):
-            sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
+        if interface_name is not None:
+            sw_if_index = InterfaceUtil.get_interface_index(
+                node, interface_name)

         else:
         else:

-            sw_if_index = interface
+            sw_if_index = int(Constants.BITWISE_NON_ZERO)

 
 

-        with VatTerminal(node) as vat:
-            vat.vat_terminal_exec_cmd_from_template(
-                "proxy_arp_intfc_enable.vat",
-                sw_if_index=sw_if_index)
-
-    @staticmethod
-    def vpp_ip_source_check_setup(node, interface):
-        """Setup Reverse Path Forwarding source check on interface.
+        cmd = 'vxlan_gpe_tunnel_dump'
+        cmd_reply = 'vxlan_gpe_tunnel_details'
+        args = dict(sw_if_index=sw_if_index)
+        err_msg = 'Failed to get VXLAN-GPE dump on host {host}'.format(
+            host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            papi_resp = papi_exec.add(cmd, **args).get_dump(err_msg)
+
+        papi_vxlan_dump = papi_resp.reply[0]['api_reply']
+
+        def process_vxlan_gpe_dump(vxlan_dump):
+            """Process vxlan_gpe dump.
+
+            :param vxlan_dump: Vxlan_gpe nterface dump.
+            :type vxlan_dump: dict
+            :returns: Processed vxlan_gpe interface dump.
+            :rtype: dict
+            """
+            if vxlan_dump['is_ipv6']:
+                vxlan_dump['local'] = \
+                    inet_ntop(AF_INET6, vxlan_dump['local'])
+                vxlan_dump['remote'] = \
+                    inet_ntop(AF_INET6, vxlan_dump['remote'])
+            else:
+                vxlan_dump['local'] = \
+                    inet_ntop(AF_INET, vxlan_dump['local'][0:4])
+                vxlan_dump['remote'] = \
+                    inet_ntop(AF_INET, vxlan_dump['remote'][0:4])
+            return vxlan_dump
+
+        data = list() if interface_name is None else dict()
+        for item in papi_vxlan_dump:
+            if interface_name is None:
+                data.append(process_vxlan_gpe_dump(item[cmd_reply]))
+            elif item[cmd_reply]['sw_if_index'] == sw_if_index:
+                data = process_vxlan_gpe_dump(item[cmd_reply])
+                break

 
 

-        :param node: Node to setup RPF source check.
-        :param interface: Interface name to setup RPF source check.
-        :type node: dict
-        :type interface: str
-        """
-        with VatTerminal(node) as vat:
-            vat.vat_terminal_exec_cmd_from_template("ip_source_check.vat",
-                                                    interface_name=interface)
+        logger.debug('VXLAN-GPE data:\n{vxlan_gpe_data}'.format(
+            vxlan_gpe_data=data))
+        return data

 
     @staticmethod
     def assign_interface_to_fib_table(node, interface, table_id, ipv6=False):
 
     @staticmethod
     def assign_interface_to_fib_table(node, interface, table_id, ipv6=False):


@@ -1240,21 +1442,16 @@ class InterfaceUtil(object):
         :type table_id: int
         :type ipv6: bool
         """
         :type table_id: int
         :type ipv6: bool
         """

-        if isinstance(interface, basestring):
-            sw_if_index = Topology.get_interface_sw_index(node, interface)
-        else:
-            sw_if_index = interface
-
-        ipv6 = 'ipv6' if ipv6 else ''
-
-        with VatTerminal(node) as vat:
-            ret = vat.vat_terminal_exec_cmd_from_template(
-                "set_fib_to_interface.vat",
-                sw_index=sw_if_index, vrf=table_id, ipv6=ipv6)
-
-        if ret[0]["retval"] != 0:
-            raise RuntimeError('Unable to assign interface to FIB node {}.'
-                               .format(node))
+        cmd = 'sw_interface_set_table'
+        args = dict(
+            sw_if_index=InterfaceUtil.get_interface_index(node, interface),
+            is_ipv6=1 if ipv6 else 0,
+            vrf_id=int(table_id))
+        err_msg = 'Failed to assign interface {ifc} to FIB table'.format(
+            ifc=interface)
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args).get_replies(err_msg). \
+                verify_reply(err_msg=err_msg)

 
     @staticmethod
     def set_linux_interface_mac(node, interface, mac, namespace=None,
 
     @staticmethod
     def set_linux_interface_mac(node, interface, mac, namespace=None,


@@ -1325,31 +1522,32 @@ class InterfaceUtil(object):
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod

-    def init_avf_interface(node, ifc_key, numvfs=1, traffic_type='L2'):
+    def init_avf_interface(node, ifc_key, numvfs=1, osi_layer='L2'):

         """Init PCI device by creating VFs and bind them to vfio-pci for AVF
         driver testing on DUT.
 
         :param node: DUT node.
         :param ifc_key: Interface key from topology file.
         :param numvfs: Number of VFs to initialize, 0 - disable the VFs.
         """Init PCI device by creating VFs and bind them to vfio-pci for AVF
         driver testing on DUT.
 
         :param node: DUT node.
         :param ifc_key: Interface key from topology file.
         :param numvfs: Number of VFs to initialize, 0 - disable the VFs.

-        :param traffic_type: Expected type of traffic, affects spoofing.
+        :param osi_layer: OSI Layer type to initialize TG with.

             Default value "L2" sets linux interface spoof off.
             Default value "L2" sets linux interface spoof off.

-            Other values do not do that.

         :type node: dict
         :type ifc_key: str
         :type numvfs: int
         :type node: dict
         :type ifc_key: str
         :type numvfs: int

-        :type traffic_type: str
+        :type osi_layer: str

         :returns: Virtual Function topology interface keys.
         :rtype: list
         :returns: Virtual Function topology interface keys.
         :rtype: list

+        :raises RuntimeError: If a reason preventing initialization is found.

         """
         """

-        ssh = SSH()
-        ssh.connect(node)
-

         # Read PCI address and driver.
         pf_pci_addr = Topology.get_interface_pci_addr(node, ifc_key)
         pf_mac_addr = Topology.get_interface_mac(node, ifc_key).split(":")
         uio_driver = Topology.get_uio_driver(node)
         kernel_driver = Topology.get_interface_driver(node, ifc_key)
         # Read PCI address and driver.
         pf_pci_addr = Topology.get_interface_pci_addr(node, ifc_key)
         pf_mac_addr = Topology.get_interface_mac(node, ifc_key).split(":")
         uio_driver = Topology.get_uio_driver(node)
         kernel_driver = Topology.get_interface_driver(node, ifc_key)

+        if kernel_driver != "i40e":
+            raise RuntimeError(
+                "AVF needs i40e driver, not {driver} at node {host} ifc {ifc}"\
+                .format(driver=kernel_driver, host=node["host"], ifc=ifc_key))

         current_driver = DUTSetup.get_pci_dev_driver(
             node, pf_pci_addr.replace(':', r'\:'))
 
         current_driver = DUTSetup.get_pci_dev_driver(
             node, pf_pci_addr.replace(':', r'\:'))
 


@@ -1377,7 +1575,7 @@ class InterfaceUtil(object):
                 format(pci=pf_pci_addr)
             InterfaceUtil.set_linux_interface_trust_on(node, pf_dev,
                                                        vf_id=vf_id)
                 format(pci=pf_pci_addr)
             InterfaceUtil.set_linux_interface_trust_on(node, pf_dev,
                                                        vf_id=vf_id)

-            if traffic_type == 'L2':
+            if osi_layer == 'L2':

                 InterfaceUtil.set_linux_interface_spoof_off(node, pf_dev,
                                                             vf_id=vf_id)
             InterfaceUtil.set_linux_interface_mac(node, pf_dev, vf_mac_addr,
                 InterfaceUtil.set_linux_interface_spoof_off(node, pf_dev,
                                                             vf_id=vf_id)
             InterfaceUtil.set_linux_interface_mac(node, pf_dev, vf_mac_addr,


@@ -1398,238 +1596,6 @@ class InterfaceUtil(object):
 
         return vf_ifc_keys
 
 
         return vf_ifc_keys
 

-    @staticmethod
-    def vpp_create_multiple_vxlan_ipv4_tunnels(
-            node, node_vxlan_if, node_vlan_if, op_node, op_node_if,
-            n_tunnels, vni_start, src_ip_start, dst_ip_start, ip_step, ip_limit,
-            bd_id_start):
-        """Create multiple VXLAN tunnel interfaces and VLAN sub-interfaces on
-        VPP node.
-
-        Put each pair of VXLAN tunnel interface and VLAN sub-interface to
-        separate bridge-domain.
-
-        :param node: VPP node to create VXLAN tunnel interfaces.
-        :param node_vxlan_if: VPP node interface key to create VXLAN tunnel
-            interfaces.
-        :param node_vlan_if: VPP node interface key to create VLAN
-            sub-interface.
-        :param op_node: Opposite VPP node for VXLAN tunnel interfaces.
-        :param op_node_if: Opposite VPP node interface key for VXLAN tunnel
-            interfaces.
-        :param n_tunnels: Number of tunnel interfaces to create.
-        :param vni_start: VNI start ID.
-        :param src_ip_start: VXLAN tunnel source IP address start.
-        :param dst_ip_start: VXLAN tunnel destination IP address start.
-        :param ip_step: IP address incremental step.
-        :param ip_limit: IP address limit.
-        :param bd_id_start: Bridge-domain ID start.
-        :type node: dict
-        :type node_vxlan_if: str
-        :type node_vlan_if: str
-        :type op_node: dict
-        :type op_node_if: str
-        :type n_tunnels: int
-        :type vni_start: int
-        :type src_ip_start: str
-        :type dst_ip_start: str
-        :type ip_step: int
-        :type ip_limit: str
-        :type bd_id_start: int
-        """
-        # configure IPs, create VXLAN interfaces and VLAN sub-interfaces
-        vxlan_count = InterfaceUtil.vpp_create_vxlan_and_vlan_interfaces(
-            node, node_vxlan_if, node_vlan_if, n_tunnels, vni_start,
-            src_ip_start, dst_ip_start, ip_step, ip_limit)
-
-        # update topology with VXLAN interfaces and VLAN sub-interfaces data
-        # and put interfaces up
-        InterfaceUtil.vpp_put_vxlan_and_vlan_interfaces_up(
-            node, vxlan_count, node_vlan_if)
-
-        # configure bridge domains, ARPs and routes
-        InterfaceUtil.vpp_put_vxlan_and_vlan_interfaces_to_bridge_domain(
-            node, node_vxlan_if, vxlan_count, op_node, op_node_if, dst_ip_start,
-            ip_step, bd_id_start)
-
-    @staticmethod
-    def vpp_create_vxlan_and_vlan_interfaces(
-            node, node_vxlan_if, node_vlan_if, vxlan_count, vni_start,
-            src_ip_start, dst_ip_start, ip_step, ip_limit):
-        """
-        Configure IPs, create VXLAN interfaces and VLAN sub-interfaces on VPP
-        node.
-
-        :param node: VPP node.
-        :param node_vxlan_if: VPP node interface key to create VXLAN tunnel
-            interfaces.
-        :param node_vlan_if: VPP node interface key to create VLAN
-            sub-interface.
-        :param vxlan_count: Number of tunnel interfaces to create.
-        :param vni_start: VNI start ID.
-        :param src_ip_start: VXLAN tunnel source IP address start.
-        :param dst_ip_start: VXLAN tunnel destination IP address start.
-        :param ip_step: IP address incremental step.
-        :param ip_limit: IP address limit.
-        :type node: dict
-        :type node_vxlan_if: str
-        :type node_vlan_if: str
-        :type vxlan_count: int
-        :type vni_start: int
-        :type src_ip_start: str
-        :type dst_ip_start: str
-        :type ip_step: int
-        :type ip_limit: str
-        :returns: Number of created VXLAN interfaces.
-        :rtype: int
-        """
-        commands = list()
-
-        src_ip_start_int = IPUtil.ip_to_int(src_ip_start)
-        dst_ip_start_int = IPUtil.ip_to_int(dst_ip_start)
-        ip_limit_int = IPUtil.ip_to_int(ip_limit)
-
-        tmp_fn = '/tmp/create_vxlan_interfaces.config'
-        for i in range(0, vxlan_count):
-            src_ip_int = src_ip_start_int + i * ip_step
-            dst_ip_int = dst_ip_start_int + i * ip_step
-            if src_ip_int > ip_limit_int or dst_ip_int > ip_limit_int:
-                logger.warn("Can't do more iterations - IPv4 address limit "
-                            "has been reached.")
-                vxlan_count = i
-                break
-            src_ip = IPUtil.int_to_ip(src_ip_int)
-            dst_ip = IPUtil.int_to_ip(dst_ip_int)
-            commands.append(
-                'sw_interface_add_del_address sw_if_index {sw_idx} {ip}/32\n'
-                .format(sw_idx=Topology.get_interface_sw_index(
-                    node, node_vxlan_if), ip=src_ip))
-            commands.append(
-                'vxlan_add_del_tunnel src {src_ip} dst {dst_ip} vni {vni}\n'
-                .format(src_ip=src_ip, dst_ip=dst_ip, vni=vni_start+i))
-            commands.append(
-                'create_vlan_subif sw_if_index {sw_idx} vlan {vlan}\n'
-                .format(sw_idx=Topology.get_interface_sw_index(
-                    node, node_vlan_if), vlan=i+1))
-
-        VatExecutor().write_and_execute_script(node, tmp_fn, commands)
-
-        return vxlan_count
-
-    @staticmethod
-    def vpp_put_vxlan_and_vlan_interfaces_up(node, vxlan_count, node_vlan_if):
-        """
-        Update topology with VXLAN interfaces and VLAN sub-interfaces data
-        and put interfaces up.
-
-        :param node: VPP node.
-        :param vxlan_count: Number of tunnel interfaces.
-        :param node_vlan_if: VPP node interface key where VLAN sub-interfaces
-            have been created.
-        :type node: dict
-        :type vxlan_count: int
-        :type node_vlan_if: str
-        """
-        with VatTerminal(node) as vat_ter:
-            if_data = vat_ter.vat_terminal_exec_cmd_from_template(
-                'interface_dump.vat')[0]
-
-        tmp_fn = '/tmp/put_subinterfaces_up.config'
-        commands = list()
-        for i in range(0, vxlan_count):
-            vxlan_subif_key = Topology.add_new_port(node, 'vxlan_tunnel')
-            vxlan_subif_name = 'vxlan_tunnel{nr}'.format(nr=i)
-            vxlan_found = False
-            vxlan_subif_idx = None
-            vlan_subif_key = Topology.add_new_port(node, 'vlan_subif')
-            vlan_subif_name = '{if_name}.{vlan}'.format(
-                if_name=Topology.get_interface_name(
-                    node, node_vlan_if), vlan=i+1)
-            vlan_found = False
-            vlan_idx = None
-            for data in if_data:
-                if_name = data['interface_name']
-                if not vxlan_found and if_name == vxlan_subif_name:
-                    vxlan_subif_idx = data['sw_if_index']
-                    vxlan_found = True
-                elif not vlan_found and if_name == vlan_subif_name:
-                    vlan_idx = data['sw_if_index']
-                    vlan_found = True
-                if vxlan_found and vlan_found:
-                    break
-            Topology.update_interface_sw_if_index(
-                node, vxlan_subif_key, vxlan_subif_idx)
-            Topology.update_interface_name(
-                node, vxlan_subif_key, vxlan_subif_name)
-            commands.append(
-                'sw_interface_set_flags sw_if_index {sw_idx} admin-up link-up\n'
-                .format(sw_idx=vxlan_subif_idx))
-            Topology.update_interface_sw_if_index(
-                node, vlan_subif_key, vlan_idx)
-            Topology.update_interface_name(
-                node, vlan_subif_key, vlan_subif_name)
-            commands.append(
-                'sw_interface_set_flags sw_if_index {sw_idx} admin-up link-up\n'
-                .format(sw_idx=vlan_idx))
-
-        VatExecutor().write_and_execute_script(node, tmp_fn, commands)
-
-    @staticmethod
-    def vpp_put_vxlan_and_vlan_interfaces_to_bridge_domain(
-            node, node_vxlan_if, vxlan_count, op_node, op_node_if, dst_ip_start,
-            ip_step, bd_id_start):
-        """
-        Configure ARPs and routes for VXLAN interfaces and put each pair of
-        VXLAN tunnel interface and VLAN sub-interface to separate bridge-domain.
-
-        :param node: VPP node.
-        :param node_vxlan_if: VPP node interface key where VXLAN tunnel
-            interfaces have been created.
-        :param vxlan_count: Number of tunnel interfaces.
-        :param op_node: Opposite VPP node for VXLAN tunnel interfaces.
-        :param op_node_if: Opposite VPP node interface key for VXLAN tunnel
-            interfaces.
-        :param dst_ip_start: VXLAN tunnel destination IP address start.
-        :param ip_step: IP address incremental step.
-        :param bd_id_start: Bridge-domain ID start.
-        :type node: dict
-        :type node_vxlan_if: str
-        :type vxlan_count: int
-        :type op_node: dict
-        :type op_node_if:
-        :type dst_ip_start: str
-        :type ip_step: int
-        :type bd_id_start: int
-        """
-        sw_idx_vxlan = Topology.get_interface_sw_index(node, node_vxlan_if)
-
-        dst_ip_start_int = IPUtil.ip_to_int(dst_ip_start)
-
-        tmp_fn = '/tmp/configure_routes_and_bridge_domains.config'
-        commands = list()
-        for i in range(0, vxlan_count):
-            dst_ip = IPUtil.int_to_ip(dst_ip_start_int + i * ip_step)
-            commands.append(
-                'ip_neighbor_add_del sw_if_index {sw_idx} dst {ip} mac {mac}\n'
-                .format(sw_idx=sw_idx_vxlan, ip=dst_ip,
-                        mac=Topology.get_interface_mac(op_node, op_node_if)))
-            commands.append(
-                'ip_add_del_route {ip}/32 via {ip} sw_if_index {sw_idx}'
-                ' resolve-attempts 10 count 1\n'.format(
-                    ip=dst_ip, sw_idx=sw_idx_vxlan))
-            bd_id = bd_id_start + i
-            subif_id = i + 1
-            commands.append(
-                'sw_interface_set_l2_bridge sw_if_index {sw_idx} bd_id {bd_id} '
-                'shg 0 enable\n'.format(sw_idx=Topology.get_interface_sw_index(
-                    node, 'vxlan_tunnel{nr}'.format(nr=subif_id)), bd_id=bd_id))
-            commands.append(
-                'sw_interface_set_l2_bridge sw_if_index {sw_idx} bd_id {bd_id} '
-                'shg 0 enable\n'.format(sw_idx=Topology.get_interface_sw_index(
-                    node, 'vlan_subif{nr}'.format(nr=subif_id)), bd_id=bd_id))
-
-        VatExecutor().write_and_execute_script(node, tmp_fn, commands)
-

     @staticmethod
     def vpp_sw_interface_rx_placement_dump(node):
         """Dump VPP interface RX placement on node.
     @staticmethod
     def vpp_sw_interface_rx_placement_dump(node):
         """Dump VPP interface RX placement on node.


@@ -1639,7 +1605,6 @@ class InterfaceUtil(object):
         :returns: Thread mapping information as a list of dictionaries.
         :rtype: list
         """
         :returns: Thread mapping information as a list of dictionaries.
         :rtype: list
         """

-

         cmd = 'sw_interface_rx_placement_dump'
         cmd_reply = 'sw_interface_rx_placement_details'
         err_msg = "Failed to run '{cmd}' PAPI command on host {host}!".format(
         cmd = 'sw_interface_rx_placement_dump'
         cmd_reply = 'sw_interface_rx_placement_details'
         err_msg = "Failed to run '{cmd}' PAPI command on host {host}!".format(


@@ -1669,20 +1634,14 @@ class InterfaceUtil(object):
         :raises RuntimeError: If failed to run command on host or if no API
             reply received.
         """
         :raises RuntimeError: If failed to run command on host or if no API
             reply received.
         """

-

         cmd = 'sw_interface_set_rx_placement'
         cmd = 'sw_interface_set_rx_placement'

-        cmd_reply = 'sw_interface_set_rx_placement_reply'
-        err_msg = "Failed to run '{cmd}' PAPI command on host {host}!".format(
-            host=node['host'], cmd=cmd)
+        err_msg = "Failed to set interface RX placement to worker on host " \
+                  "{host}!".format(host=node['host'])

         args = dict(sw_if_index=sw_if_index, queue_id=queue_id,
                     worker_id=worker_id)
         with PapiExecutor(node) as papi_exec:
         args = dict(sw_if_index=sw_if_index, queue_id=queue_id,
                     worker_id=worker_id)
         with PapiExecutor(node) as papi_exec:

-            papi_resp = papi_exec.add(cmd, **args).execute_should_pass(err_msg)
-        data = papi_resp.reply[0]['api_reply'][cmd_reply]
-        if data['retval'] != 0:
-            raise RuntimeError("Failed to set interface RX placement "
-                               "to worker on host {host}".
-                               format(host=node['host']))
+            papi_exec.add(cmd, **args).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)

 
     @staticmethod
     def vpp_round_robin_rx_placement(node, prefix):
 
     @staticmethod
     def vpp_round_robin_rx_placement(node, prefix):


@@ -1696,6 +1655,8 @@ class InterfaceUtil(object):
         """
         worker_id = 0
         worker_cnt = len(VPPUtil.vpp_show_threads(node)) - 1
         """
         worker_id = 0
         worker_cnt = len(VPPUtil.vpp_show_threads(node)) - 1

+        if not worker_cnt:
+            return

         for placement in InterfaceUtil.vpp_sw_interface_rx_placement_dump(node):
             for interface in node['interfaces'].values():
                 if placement['sw_if_index'] == interface['vpp_sw_index'] \
         for placement in InterfaceUtil.vpp_sw_interface_rx_placement_dump(node):
             for interface in node['interfaces'].values():
                 if placement['sw_if_index'] == interface['vpp_sw_index'] \