Add gtpu sw performance test cases
[csit.git] / resources / libraries / python / InterfaceUtil.py
index 6de17d1..94c78a1 100644 (file)
@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Cisco and/or its affiliates.
+# Copyright (c) 2021 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:
 
 """Interface util library."""
 
-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 resources.libraries.python.Constants import Constants
 from resources.libraries.python.CpuUtils import CpuUtils
 from resources.libraries.python.DUTSetup import DUTSetup
+from resources.libraries.python.IPAddress import IPAddress
 from resources.libraries.python.L2Util import L2Util
 from resources.libraries.python.PapiExecutor import PapiSocketExecutor
 from resources.libraries.python.parsers.JsonParser import JsonParser
-from resources.libraries.python.ssh import SSH, exec_cmd_no_error
+from resources.libraries.python.ssh import SSH, exec_cmd, exec_cmd_no_error
 from resources.libraries.python.topology import NodeType, Topology
 from resources.libraries.python.VPPUtil import VPPUtil
 
 
-class LinkBondLoadBalance(IntEnum):
-    """Link bonding load balance."""
-    L2 = 0
-    L34 = 1
-    L23 = 2
+class InterfaceStatusFlags(IntEnum):
+    """Interface status flags."""
+    IF_STATUS_API_FLAG_ADMIN_UP = 1
+    IF_STATUS_API_FLAG_LINK_UP = 2
+
+
+class MtuProto(IntEnum):
+    """MTU protocol."""
+    MTU_PROTO_API_L3 = 0
+    MTU_PROTO_API_IP4 = 1
+    MTU_PROTO_API_IP6 = 2
+    MTU_PROTO_API_MPLS = 3
+    MTU_PROTO_API_N = 4
+
+
+class LinkDuplex(IntEnum):
+    """Link duplex"""
+    LINK_DUPLEX_API_UNKNOWN = 0
+    LINK_DUPLEX_API_HALF = 1
+    LINK_DUPLEX_API_FULL = 2
+
+
+class SubInterfaceFlags(IntEnum):
+    """Sub-interface flags."""
+    SUB_IF_API_FLAG_NO_TAGS = 1
+    SUB_IF_API_FLAG_ONE_TAG = 2
+    SUB_IF_API_FLAG_TWO_TAGS = 4
+    SUB_IF_API_FLAG_DOT1AD = 8
+    SUB_IF_API_FLAG_EXACT_MATCH = 16
+    SUB_IF_API_FLAG_DEFAULT = 32
+    SUB_IF_API_FLAG_OUTER_VLAN_ID_ANY = 64
+    SUB_IF_API_FLAG_INNER_VLAN_ID_ANY = 128
+    SUB_IF_API_FLAG_DOT1AH = 256
+
+
+class RxMode(IntEnum):
+    """RX mode"""
+    RX_MODE_API_UNKNOWN = 0
+    RX_MODE_API_POLLING = 1
+    RX_MODE_API_INTERRUPT = 2
+    RX_MODE_API_ADAPTIVE = 3
+    RX_MODE_API_DEFAULT = 4
+
+
+class IfType(IntEnum):
+    """Interface type"""
+    # A hw interface
+    IF_API_TYPE_HARDWARE = 0
+    # A sub-interface
+    IF_API_TYPE_SUB = 1
+    IF_API_TYPE_P2P = 2
+    IF_API_TYPE_PIPE = 3
+
+
+class LinkBondLoadBalanceAlgo(IntEnum):
+    """Link bonding load balance algorithm."""
+    BOND_API_LB_ALGO_L2 = 0
+    BOND_API_LB_ALGO_L34 = 1
+    BOND_API_LB_ALGO_L23 = 2
+    BOND_API_LB_ALGO_RR = 3
+    BOND_API_LB_ALGO_BC = 4
+    BOND_API_LB_ALGO_AB = 5
 
 
 class LinkBondMode(IntEnum):
-    """Link bonding load balance."""
-    ROUND_ROBIN = 1
-    ACTIVE_BACKUP = 2
-    XOR = 3
-    BROADCAST = 4
-    LACP = 5
+    """Link bonding mode."""
+    BOND_API_MODE_ROUND_ROBIN = 1
+    BOND_API_MODE_ACTIVE_BACKUP = 2
+    BOND_API_MODE_XOR = 3
+    BOND_API_MODE_BROADCAST = 4
+    BOND_API_MODE_LACP = 5
 
 
-class InterfaceUtil(object):
-    """General utilities for managing interfaces"""
+class RdmaMode(IntEnum):
+    """RDMA interface mode."""
+    RDMA_API_MODE_AUTO = 0
+    RDMA_API_MODE_IBV = 1
+    RDMA_API_MODE_DV = 2
 
-    __UDEV_IF_RULES_FILE = '/etc/udev/rules.d/10-network.rules'
+
+class AfXdpMode(IntEnum):
+    """AF_XDP interface mode."""
+    AF_XDP_API_MODE_AUTO = 0
+    AF_XDP_API_MODE_COPY = 1
+    AF_XDP_API_MODE_ZERO_COPY = 2
+
+
+class InterfaceUtil:
+    """General utilities for managing interfaces"""
 
     @staticmethod
     def pci_to_int(pci_str):
@@ -62,12 +131,31 @@ class InterfaceUtil(object):
         :returns: Integer representation of PCI address.
         :rtype: int
         """
-        pci = list(pci_str.split(':')[0:2])
-        pci.extend(pci_str.split(':')[2].split('.'))
+        pci = list(pci_str.split(u":")[0:2])
+        pci.extend(pci_str.split(u":")[2].split(u"."))
 
         return (int(pci[0], 16) | int(pci[1], 16) << 16 |
                 int(pci[2], 16) << 24 | int(pci[3], 16) << 29)
 
+    @staticmethod
+    def pci_to_eth(node, pci_str):
+        """Convert PCI address on DUT to Linux ethernet name.
+
+        :param node: DUT node
+        :param pci_str: PCI address.
+        :type node: dict
+        :type pci_str: str
+        :returns: Ethernet name.
+        :rtype: str
+        """
+        cmd = f"basename /sys/bus/pci/devices/{pci_str}/net/*"
+        try:
+            stdout, _ = exec_cmd_no_error(node, cmd)
+        except RuntimeError:
+            raise RuntimeError(f"Cannot convert {pci_str} to ethernet name!")
+
+        return stdout.strip()
+
     @staticmethod
     def get_interface_index(node, interface):
         """Get interface sw_if_index from topology file.
@@ -87,13 +175,12 @@ class InterfaceUtil(object):
                 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))
+            raise TypeError(f"Wrong interface format {interface}") from err
 
         return sw_if_index
 
     @staticmethod
-    def set_interface_state(node, interface, state, if_type='key'):
+    def set_interface_state(node, interface, state, if_type=u"key"):
         """Set interface state on a node.
 
         Function can be used for DUTs as well as for TGs.
@@ -111,82 +198,135 @@ class InterfaceUtil(object):
         :raises ValueError: If the state of interface is unexpected.
         :raises ValueError: If the node has an unknown node type.
         """
-        if if_type == 'key':
-            if isinstance(interface, basestring):
+        if if_type == u"key":
+            if isinstance(interface, str):
                 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 == u"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:
-            raise ValueError('Unknown if_type: {type}'.format(type=if_type))
+            raise ValueError(f"Unknown if_type: {if_type}")
 
-        if node['type'] == NodeType.DUT:
-            if state == 'up':
-                admin_up_down = 1
-            elif state == 'down':
-                admin_up_down = 0
+        if node[u"type"] == NodeType.DUT:
+            if state == u"up":
+                flags = InterfaceStatusFlags.IF_STATUS_API_FLAG_ADMIN_UP.value
+            elif state == u"down":
+                flags = 0
             else:
-                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)
+                raise ValueError(f"Unexpected interface state: {state}")
+            cmd = u"sw_interface_set_flags"
+            err_msg = f"Failed to set interface state on host {node[u'host']}"
+            args = dict(
+                sw_if_index=int(sw_if_index),
+                flags=flags
+            )
             with PapiSocketExecutor(node) as papi_exec:
                 papi_exec.add(cmd, **args).get_reply(err_msg)
-        elif node['type'] == NodeType.TG or node['type'] == NodeType.VM:
-            cmd = 'ip link set {ifc} {state}'.format(
-                ifc=iface_name, state=state)
+        elif node[u"type"] == NodeType.TG or node[u"type"] == NodeType.VM:
+            cmd = f"ip link set {iface_name} {state}"
             exec_cmd_no_error(node, cmd, sudo=True)
         else:
-            raise ValueError('Node {} has unknown NodeType: "{}"'
-                             .format(node['host'], node['type']))
+            raise ValueError(
+                f"Node {node[u'host']} has unknown NodeType: {node[u'type']}"
+            )
 
     @staticmethod
-    def set_interface_ethernet_mtu(node, iface_key, mtu):
-        """Set Ethernet MTU for specified interface.
+    def set_interface_state_pci(
+            node, pf_pcis, namespace=None, state=u"up"):
+        """Set operational state for interface specified by PCI address.
+
+        :param node: Topology node.
+        :param pf_pcis: List of node's interfaces PCI addresses.
+        :param namespace: Exec command in namespace. (Optional, Default: none)
+        :param state: Up/Down. (Optional, default: up)
+        :type nodes: dict
+        :type pf_pcis: list
+        :type namespace: str
+        :type state: str
+        """
+        for pf_pci in pf_pcis:
+            pf_eth = InterfaceUtil.pci_to_eth(node, pf_pci)
+            InterfaceUtil.set_linux_interface_state(
+                node, pf_eth, namespace=namespace, state=state
+            )
 
-        Function can be used only for TGs.
+    @staticmethod
+    def set_interface_mtu(node, pf_pcis, mtu=9200):
+        """Set Ethernet MTU for specified interfaces.
 
-        :param node: Node where the interface is.
-        :param iface_key: Interface key from topology file.
-        :param mtu: MTU to set.
-        :type node: dict
-        :type iface_key: str
+        :param node: Topology node.
+        :param pf_pcis: List of node's interfaces PCI addresses.
+        :param mtu: MTU to set. Default: 9200.
+        :type nodes: dict
+        :type pf_pcis: list
         :type mtu: int
-        :returns: Nothing.
-        :raises ValueError: If the node type is "DUT".
-        :raises ValueError: If the node has an unknown node type.
+        :raises RuntimeError: If failed to set MTU on interface.
         """
-        if node['type'] == NodeType.DUT:
-            raise ValueError('Node {}: Setting Ethernet MTU for interface '
-                             'on DUT nodes not supported', node['host'])
-        elif node['type'] == NodeType.TG:
-            iface_name = Topology.get_interface_name(node, iface_key)
-            cmd = 'ip link set {} mtu {}'.format(iface_name, mtu)
+        for pf_pci in pf_pcis:
+            pf_eth = InterfaceUtil.pci_to_eth(node, pf_pci)
+            cmd = f"ip link set {pf_eth} mtu {mtu}"
             exec_cmd_no_error(node, cmd, sudo=True)
-        else:
-            raise ValueError('Node {} has unknown NodeType: "{}"'
-                             .format(node['host'], node['type']))
 
     @staticmethod
-    def set_default_ethernet_mtu_on_all_interfaces_on_node(node):
-        """Set default Ethernet MTU on all interfaces on node.
+    def set_interface_channels(
+            node, pf_pcis, num_queues=1, channel=u"combined"):
+        """Set interface channels for specified interfaces.
+
+        :param node: Topology node.
+        :param pf_pcis: List of node's interfaces PCI addresses.
+        :param num_queues: Number of channels. (Optional, Default: 1)
+        :param channel: Channel type. (Optional, Default: combined)
+        :type nodes: dict
+        :type pf_pcis: list
+        :type num_queues: int
+        :type channel: str
+        """
+        for pf_pci in pf_pcis:
+            pf_eth = InterfaceUtil.pci_to_eth(node, pf_pci)
+            cmd = f"ethtool --set-channels {pf_eth} {channel} {num_queues}"
+            exec_cmd_no_error(node, cmd, sudo=True)
 
-        Function can be used only for TGs.
+    @staticmethod
+    def set_interface_flow_control(node, pf_pcis, rxf=u"off", txf=u"off"):
+        """Set Ethernet flow control for specified interfaces.
 
-        :param node: Node where to set default MTU.
-        :type node: dict
-        :returns: Nothing.
+        :param node: Topology node.
+        :param pf_pcis: List of node's interfaces PCI addresses.
+        :param rxf: RX flow. (Optional, Default: off).
+        :param txf: TX flow. (Optional, Default: off).
+        :type nodes: dict
+        :type pf_pcis: list
+        :type rxf: str
+        :type txf: str
+        """
+        for pf_pci in pf_pcis:
+            pf_eth = InterfaceUtil.pci_to_eth(node, pf_pci)
+            cmd = f"ethtool -A {pf_eth} rx {rxf} tx {txf}"
+            ret_code, _, _ = exec_cmd(node, cmd, sudo=True)
+            if int(ret_code) not in (0, 78):
+                raise RuntimeError("Failed to set flow control on {pf_eth}!")
+
+    @staticmethod
+    def set_pci_parameter(node, pf_pcis, key, value):
+        """Set PCI parameter for specified interfaces.
+
+        :param node: Topology node.
+        :param pf_pcis: List of node's interfaces PCI addresses.
+        :param key: Key to set.
+        :param value: Value to set.
+        :type nodes: dict
+        :type pf_pcis: list
+        :type key: str
+        :type value: str
         """
-        for ifc in node['interfaces']:
-            InterfaceUtil.set_interface_ethernet_mtu(node, ifc, 1500)
+        for pf_pci in pf_pcis:
+            cmd = f"setpci -s {pf_pci} {key}={value}"
+            exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
     def vpp_set_interface_mtu(node, interface, mtu=9200):
@@ -199,23 +339,22 @@ class InterfaceUtil(object):
         :type interface: str or int
         :type mtu: int
         """
-        if isinstance(interface, basestring):
+        if isinstance(interface, str):
             sw_if_index = Topology.get_interface_sw_index(node, interface)
         else:
             sw_if_index = interface
 
-        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))
+        cmd = u"hw_interface_set_mtu"
+        err_msg = f"Failed to set interface MTU on host {node[u'host']}"
+        args = dict(
+            sw_if_index=sw_if_index,
+            mtu=int(mtu)
+        )
         try:
             with PapiSocketExecutor(node) as papi_exec:
                 papi_exec.add(cmd, **args).get_reply(err_msg)
         except AssertionError as err:
-            # TODO: Make failure tolerance optional.
-            logger.debug("Setting MTU failed. Expected?\n{err}".format(
-                err=err))
+            logger.debug(f"Setting MTU failed.\n{err}")
 
     @staticmethod
     def vpp_set_interfaces_mtu_on_node(node, mtu=9200):
@@ -226,7 +365,7 @@ class InterfaceUtil(object):
         :type node: dict
         :type mtu: int
         """
-        for interface in node['interfaces']:
+        for interface in node[u"interfaces"]:
             InterfaceUtil.vpp_set_interface_mtu(node, interface, mtu)
 
     @staticmethod
@@ -239,7 +378,7 @@ class InterfaceUtil(object):
         :type mtu: int
         """
         for node in nodes.values():
-            if node['type'] == NodeType.DUT:
+            if node[u"type"] == NodeType.DUT:
                 InterfaceUtil.vpp_set_interfaces_mtu_on_node(node, mtu)
 
     @staticmethod
@@ -255,22 +394,22 @@ class InterfaceUtil(object):
         :raises RuntimeError: If any interface is not in link-up state after
             defined number of retries.
         """
-        for _ in xrange(0, retries):
+        for _ in range(0, retries):
             not_ready = list()
             out = InterfaceUtil.vpp_get_interface_data(node)
             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:
-                break
-            else:
-                logger.debug('Interfaces still in link-down state:\n{ifs} '
-                             '\nWaiting...'.format(ifs=not_ready))
+                if interface.get(u"flags") == 1:
+                    not_ready.append(interface.get(u"interface_name"))
+            if not_ready:
+                logger.debug(
+                    f"Interfaces still not in link-up state:\n{not_ready}"
+                )
                 sleep(1)
+            else:
+                break
         else:
-            err = 'Timeout, interfaces not up:\n{ifs}'.format(ifs=not_ready) \
-                if 'not_ready' in locals() else 'No check executed!'
+            err = f"Timeout, interfaces not up:\n{not_ready}" \
+                if u"not_ready" in locals() else u"No check executed!"
             raise RuntimeError(err)
 
     @staticmethod
@@ -286,7 +425,7 @@ class InterfaceUtil(object):
         :returns: Nothing.
         """
         for node in nodes.values():
-            if node['type'] == NodeType.DUT:
+            if node[u"type"] == NodeType.DUT:
                 InterfaceUtil.vpp_node_interfaces_ready_wait(node, retries)
 
     @staticmethod
@@ -305,25 +444,6 @@ class InterfaceUtil(object):
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """
-        if interface is not None:
-            if isinstance(interface, basestring):
-                param = 'interface_name'
-            elif isinstance(interface, int):
-                param = 'sw_if_index'
-            else:
-                raise TypeError('Wrong interface format {ifc}'.format(
-                    ifc=interface))
-        else:
-            param = ''
-
-        cmd = 'sw_interface_dump'
-        args = dict(name_filter_valid=0,
-                    name_filter='')
-        err_msg = 'Failed to get interface dump on host {host}'.format(
-            host=node['host'])
-        with PapiSocketExecutor(node) as papi_exec:
-            details = papi_exec.add(cmd, **args).get_details(err_msg)
-
         def process_if_dump(if_dump):
             """Process interface dump.
 
@@ -332,22 +452,48 @@ class InterfaceUtil(object):
             :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'])
+            if_dump[u"l2_address"] = str(if_dump[u"l2_address"])
+            if_dump[u"b_dmac"] = str(if_dump[u"b_dmac"])
+            if_dump[u"b_smac"] = str(if_dump[u"b_smac"])
+            if_dump[u"flags"] = if_dump[u"flags"].value
+            if_dump[u"type"] = if_dump[u"type"].value
+            if_dump[u"link_duplex"] = if_dump[u"link_duplex"].value
+            if_dump[u"sub_if_flags"] = if_dump[u"sub_if_flags"].value \
+                if hasattr(if_dump[u"sub_if_flags"], u"value") \
+                else int(if_dump[u"sub_if_flags"])
+
             return if_dump
 
+        if interface is not None:
+            if isinstance(interface, str):
+                param = u"interface_name"
+            elif isinstance(interface, int):
+                param = u"sw_if_index"
+            else:
+                raise TypeError(f"Wrong interface format {interface}")
+        else:
+            param = u""
+
+        cmd = u"sw_interface_dump"
+        args = dict(
+            name_filter_valid=False,
+            name_filter=u""
+        )
+        err_msg = f"Failed to get interface dump on host {node[u'host']}"
+
+        with PapiSocketExecutor(node) as papi_exec:
+            details = papi_exec.add(cmd, **args).get_details(err_msg)
+        logger.debug(f"Received data:\n{details!r}")
+
         data = list() if interface is None else dict()
-        for if_dump in details:
+        for dump in details:
             if interface is None:
-                data.append(process_if_dump(if_dump))
-            elif str(if_dump.get(param)).rstrip('\x00') == str(interface):
-                data = process_if_dump(if_dump)
+                data.append(process_if_dump(dump))
+            elif str(dump.get(param)).rstrip(u"\x00") == str(interface):
+                data = process_if_dump(dump)
                 break
 
-        logger.debug('Interface data:\n{if_data}'.format(if_data=data))
+        logger.debug(f"Interface data:\n{data}")
         return data
 
     @staticmethod
@@ -363,11 +509,12 @@ class InterfaceUtil(object):
         :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 if_data[u"sup_sw_if_index"] != if_data[u"sw_if_index"]:
             if_data = InterfaceUtil.vpp_get_interface_data(
-                node, if_data['sup_sw_if_index'])
+                node, if_data[u"sup_sw_if_index"]
+            )
 
-        return if_data.get('interface_name')
+        return if_data.get(u"interface_name")
 
     @staticmethod
     def vpp_get_interface_sw_index(node, interface_name):
@@ -383,7 +530,7 @@ class InterfaceUtil(object):
         """
         if_data = InterfaceUtil.vpp_get_interface_data(node, interface_name)
 
-        return if_data.get('sw_if_index')
+        return if_data.get(u"sw_if_index")
 
     @staticmethod
     def vpp_get_interface_mac(node, interface):
@@ -397,11 +544,32 @@ class InterfaceUtil(object):
         :rtype: str
         """
         if_data = InterfaceUtil.vpp_get_interface_data(node, interface)
-        if if_data['sup_sw_if_index'] != if_data['sw_if_index']:
+        if if_data[u"sup_sw_if_index"] != if_data[u"sw_if_index"]:
             if_data = InterfaceUtil.vpp_get_interface_data(
-                node, if_data['sup_sw_if_index'])
+                node, if_data[u"sup_sw_if_index"])
+
+        return if_data.get(u"l2_address")
+
+    @staticmethod
+    def vpp_set_interface_mac(node, interface, mac):
+        """Set MAC address for the given interface.
 
-        return if_data.get('l2_address')
+        :param node: VPP node to set interface MAC.
+        :param interface: Numeric index or name string of a specific interface.
+        :param mac: Required MAC address.
+        :type node: dict
+        :type interface: int or str
+        :type mac: str
+        """
+        cmd = u"sw_interface_set_mac_address"
+        args = dict(
+            sw_if_index=InterfaceUtil.get_interface_index(node, interface),
+            mac_address=L2Util.mac_to_bin(mac)
+        )
+        err_msg = f"Failed to set MAC address of interface {interface}" \
+            f"on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args).get_reply(err_msg)
 
     @staticmethod
     def tg_set_interface_driver(node, pci_addr, driver):
@@ -425,20 +593,17 @@ class InterfaceUtil(object):
 
         # Unbind from current driver
         if old_driver is not None:
-            cmd = 'sh -c "echo {0} > /sys/bus/pci/drivers/{1}/unbind"'\
-                .format(pci_addr, old_driver)
-            (ret_code, _, _) = ssh.exec_command_sudo(cmd)
+            cmd = f"sh -c \"echo {pci_addr} > " \
+                f"/sys/bus/pci/drivers/{old_driver}/unbind\""
+            ret_code, _, _ = ssh.exec_command_sudo(cmd)
             if int(ret_code) != 0:
-                raise RuntimeError("'{0}' failed on '{1}'"
-                                   .format(cmd, node['host']))
+                raise RuntimeError(f"'{cmd}' failed on '{node[u'host']}'")
 
         # Bind to the new driver
-        cmd = 'sh -c "echo {0} > /sys/bus/pci/drivers/{1}/bind"'\
-            .format(pci_addr, driver)
-        (ret_code, _, _) = ssh.exec_command_sudo(cmd)
+        cmd = f"sh -c \"echo {pci_addr} > /sys/bus/pci/drivers/{driver}/bind\""
+        ret_code, _, _ = ssh.exec_command_sudo(cmd)
         if int(ret_code) != 0:
-            raise RuntimeError("'{0}' failed on '{1}'"
-                               .format(cmd, node['host']))
+            raise RuntimeError(f"'{cmd}' failed on '{node[u'host']}'")
 
     @staticmethod
     def tg_get_interface_driver(node, pci_addr):
@@ -454,46 +619,6 @@ class InterfaceUtil(object):
         """
         return DUTSetup.get_pci_dev_driver(node, pci_addr)
 
-    @staticmethod
-    def tg_set_interfaces_udev_rules(node):
-        """Set udev rules for interfaces.
-
-        Create udev rules file in /etc/udev/rules.d where are rules for each
-        interface used by TG node, based on MAC interface has specific name.
-        So after unbind and bind again to kernel driver interface has same
-        name as before. This must be called after TG has set name for each
-        port in topology dictionary.
-        udev rule example
-        SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="52:54:00:e1:8a:0f",
-        NAME="eth1"
-
-        :param node: Node to set udev rules on (must be TG node).
-        :type node: dict
-        :raises RuntimeError: If setting of udev rules fails.
-        """
-        ssh = SSH()
-        ssh.connect(node)
-
-        cmd = 'rm -f {0}'.format(InterfaceUtil.__UDEV_IF_RULES_FILE)
-        (ret_code, _, _) = ssh.exec_command_sudo(cmd)
-        if int(ret_code) != 0:
-            raise RuntimeError("'{0}' failed on '{1}'"
-                               .format(cmd, node['host']))
-
-        for interface in node['interfaces'].values():
-            rule = 'SUBSYSTEM==\\"net\\", ACTION==\\"add\\", ATTR{address}' + \
-                   '==\\"' + interface['mac_address'] + '\\", NAME=\\"' + \
-                   interface['name'] + '\\"'
-            cmd = 'sh -c "echo \'{0}\' >> {1}"'.format(
-                rule, InterfaceUtil.__UDEV_IF_RULES_FILE)
-            (ret_code, _, _) = ssh.exec_command_sudo(cmd)
-            if int(ret_code) != 0:
-                raise RuntimeError("'{0}' failed on '{1}'"
-                                   .format(cmd, node['host']))
-
-        cmd = '/etc/init.d/udev restart'
-        ssh.exec_command_sudo(cmd)
-
     @staticmethod
     def tg_set_interfaces_default_driver(node):
         """Set interfaces default driver specified in topology yaml file.
@@ -501,10 +626,10 @@ class InterfaceUtil(object):
         :param node: Node to setup interfaces driver on (must be TG node).
         :type node: dict
         """
-        for interface in node['interfaces'].values():
-            InterfaceUtil.tg_set_interface_driver(node,
-                                                  interface['pci_address'],
-                                                  interface['driver'])
+        for interface in node[u"interfaces"].values():
+            InterfaceUtil.tg_set_interface_driver(
+                node, interface[u"pci_address"], interface[u"driver"]
+            )
 
     @staticmethod
     def update_vpp_interface_data_on_node(node):
@@ -522,20 +647,24 @@ class InterfaceUtil(object):
         interface_list = InterfaceUtil.vpp_get_interface_data(node)
         interface_dict = dict()
         for ifc in interface_list:
-            interface_dict[ifc['l2_address']] = ifc
+            interface_dict[ifc[u"l2_address"]] = ifc
 
-        for if_name, if_data in node['interfaces'].items():
-            ifc_dict = interface_dict.get(if_data['mac_address'])
+        for if_name, if_data in node[u"interfaces"].items():
+            ifc_dict = interface_dict.get(if_data[u"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']))
+                if_data[u"name"] = ifc_dict[u"interface_name"]
+                if_data[u"vpp_sw_index"] = ifc_dict[u"sw_if_index"]
+                if_data[u"mtu"] = ifc_dict[u"mtu"][0]
+                logger.trace(
+                    f"Interface {if_name} found by MAC "
+                    f"{if_data[u'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
+                logger.trace(
+                    f"Interface {if_name} not found by MAC "
+                    f"{if_data[u'mac_address']}"
+                )
+                if_data[u"vpp_sw_index"] = None
 
     @staticmethod
     def update_nic_interface_names(node):
@@ -546,24 +675,22 @@ class InterfaceUtil(object):
         :param node: Node dictionary.
         :type node: dict
         """
-        for ifc in node['interfaces'].values():
-            if_pci = ifc['pci_address'].replace('.', ':').split(':')
-            bus = '{:x}'.format(int(if_pci[1], 16))
-            dev = '{:x}'.format(int(if_pci[2], 16))
-            fun = '{:x}'.format(int(if_pci[3], 16))
-            loc = '{bus}/{dev}/{fun}'.format(bus=bus, dev=dev, fun=fun)
-            if ifc['model'] == 'Intel-XL710':
-                ifc['name'] = 'FortyGigabitEthernet{loc}'.format(loc=loc)
-            elif ifc['model'] == 'Intel-X710':
-                ifc['name'] = 'TenGigabitEthernet{loc}'.format(loc=loc)
-            elif ifc['model'] == 'Intel-X520-DA2':
-                ifc['name'] = 'TenGigabitEthernet{loc}'.format(loc=loc)
-            elif ifc['model'] == 'Cisco-VIC-1385':
-                ifc['name'] = 'FortyGigabitEthernet{loc}'.format(loc=loc)
-            elif ifc['model'] == 'Cisco-VIC-1227':
-                ifc['name'] = 'TenGigabitEthernet{loc}'.format(loc=loc)
+        for ifc in node[u"interfaces"].values():
+            if_pci = ifc[u"pci_address"].replace(u".", u":").split(u":")
+            loc = f"{int(if_pci[1], 16):x}/{int(if_pci[2], 16):x}/" \
+                f"{int(if_pci[3], 16):x}"
+            if ifc[u"model"] == u"Intel-XL710":
+                ifc[u"name"] = f"FortyGigabitEthernet{loc}"
+            elif ifc[u"model"] == u"Intel-X710":
+                ifc[u"name"] = f"TenGigabitEthernet{loc}"
+            elif ifc[u"model"] == u"Intel-X520-DA2":
+                ifc[u"name"] = f"TenGigabitEthernet{loc}"
+            elif ifc[u"model"] == u"Cisco-VIC-1385":
+                ifc[u"name"] = f"FortyGigabitEthernet{loc}"
+            elif ifc[u"model"] == u"Cisco-VIC-1227":
+                ifc[u"name"] = f"TenGigabitEthernet{loc}"
             else:
-                ifc['name'] = 'UnknownEthernet{loc}'.format(loc=loc)
+                ifc[u"name"] = f"UnknownEthernet{loc}"
 
     @staticmethod
     def update_nic_interface_names_on_all_duts(nodes):
@@ -575,11 +702,11 @@ class InterfaceUtil(object):
         :type nodes: dict
         """
         for node in nodes.values():
-            if node['type'] == NodeType.DUT:
+            if node[u"type"] == NodeType.DUT:
                 InterfaceUtil.update_nic_interface_names(node)
 
     @staticmethod
-    def update_tg_interface_data_on_node(node, skip_tg_udev=False):
+    def update_tg_interface_data_on_node(node):
         """Update interface name for TG/linux node in DICT__nodes.
 
         .. note::
@@ -591,9 +718,7 @@ class InterfaceUtil(object):
             "00:00:00:00:00:00": "lo"
 
         :param node: Node selected from DICT__nodes.
-        :param skip_tg_udev: Skip udev rename on TG node.
         :type node: dict
-        :type skip_tg_udev: bool
         :raises RuntimeError: If getting of interface name and MAC fails.
         """
         # First setup interface driver specified in yaml file
@@ -603,23 +728,20 @@ class InterfaceUtil(object):
         ssh = SSH()
         ssh.connect(node)
 
-        cmd = ('for dev in `ls /sys/class/net/`; do echo "\\"`cat '
-               '/sys/class/net/$dev/address`\\": \\"$dev\\""; done;')
+        cmd = u'for dev in `ls /sys/class/net/`; do echo "\\"`cat ' \
+              u'/sys/class/net/$dev/address`\\": \\"$dev\\""; done;'
 
-        (ret_code, stdout, _) = ssh.exec_command(cmd)
+        ret_code, stdout, _ = ssh.exec_command(cmd)
         if int(ret_code) != 0:
-            raise RuntimeError('Get interface name and MAC failed')
-        tmp = "{" + stdout.rstrip().replace('\n', ',') + "}"
+            raise RuntimeError(u"Get interface name and MAC failed")
+        tmp = u"{" + stdout.rstrip().replace(u"\n", u",") + u"}"
+
         interfaces = JsonParser().parse_data(tmp)
-        for interface in node['interfaces'].values():
-            name = interfaces.get(interface['mac_address'])
+        for interface in node[u"interfaces"].values():
+            name = interfaces.get(interface[u"mac_address"])
             if name is None:
                 continue
-            interface['name'] = name
-
-        # Set udev rules for interfaces
-        if not skip_tg_udev:
-            InterfaceUtil.tg_set_interfaces_udev_rules(node)
+            interface[u"name"] = name
 
     @staticmethod
     def iface_update_numa_node(node):
@@ -630,55 +752,33 @@ class InterfaceUtil(object):
         :type node: dict
         :returns: Nothing.
         :raises ValueError: If numa node ia less than 0.
-        :raises RuntimeError: If update of numa node failes.
+        :raises RuntimeError: If update of numa node failed.
         """
         ssh = SSH()
         for if_key in Topology.get_node_interfaces(node):
             if_pci = Topology.get_interface_pci_addr(node, if_key)
             ssh.connect(node)
-            cmd = "cat /sys/bus/pci/devices/{}/numa_node".format(if_pci)
+            cmd = f"cat /sys/bus/pci/devices/{if_pci}/numa_node"
             for _ in range(3):
-                (ret, out, _) = ssh.exec_command(cmd)
+                ret, out, _ = ssh.exec_command(cmd)
                 if ret == 0:
                     try:
-                        numa_node = int(out)
-                        if numa_node < 0:
-                            if CpuUtils.cpu_node_count(node) == 1:
-                                numa_node = 0
-                            else:
-                                raise ValueError
+                        numa_node = 0 if int(out) < 0 else int(out)
                     except ValueError:
-                        logger.trace('Reading numa location failed for: {0}'
-                                     .format(if_pci))
+                        logger.trace(
+                            f"Reading numa location failed for: {if_pci}"
+                        )
                     else:
-                        Topology.set_interface_numa_node(node, if_key,
-                                                         numa_node)
+                        Topology.set_interface_numa_node(
+                            node, if_key, numa_node
+                        )
                         break
             else:
-                raise RuntimeError('Update numa node failed for: {0}'
-                                   .format(if_pci))
-
-    @staticmethod
-    def update_all_numa_nodes(nodes, skip_tg=False):
-        """For all nodes and all their interfaces from topology file update numa
-        node information based on information from the node.
-
-        :param nodes: Nodes in the topology.
-        :param skip_tg: Skip TG node
-        :type nodes: dict
-        :type skip_tg: bool
-        :returns: Nothing.
-        """
-        for node in nodes.values():
-            if node['type'] == NodeType.DUT:
-                InterfaceUtil.iface_update_numa_node(node)
-            elif node['type'] == NodeType.TG and not skip_tg:
-                InterfaceUtil.iface_update_numa_node(node)
+                raise RuntimeError(f"Update numa node failed for: {if_pci}")
 
     @staticmethod
-    def update_all_interface_data_on_all_nodes(nodes, skip_tg=False,
-                                               skip_tg_udev=False,
-                                               numa_node=False):
+    def update_all_interface_data_on_all_nodes(
+            nodes, skip_tg=False, skip_vpp=False):
         """Update interface names on all nodes in DICT__nodes.
 
         This method updates the topology dictionary by querying interface lists
@@ -686,58 +786,52 @@ class InterfaceUtil(object):
 
         :param nodes: Nodes in the topology.
         :param skip_tg: Skip TG node.
-        :param skip_tg_udev: Skip udev rename on TG node.
-        :param numa_node: Retrieve numa_node location.
+        :param skip_vpp: Skip VPP node.
         :type nodes: dict
         :type skip_tg: bool
-        :type skip_tg_udev: bool
-        :type numa_node: bool
+        :type skip_vpp: bool
         """
-        for node_data in nodes.values():
-            if node_data['type'] == NodeType.DUT:
-                InterfaceUtil.update_vpp_interface_data_on_node(node_data)
-            elif node_data['type'] == NodeType.TG and not skip_tg:
-                InterfaceUtil.update_tg_interface_data_on_node(
-                    node_data, skip_tg_udev)
-
-            if numa_node:
-                if node_data['type'] == NodeType.DUT:
-                    InterfaceUtil.iface_update_numa_node(node_data)
-                elif node_data['type'] == NodeType.TG and not skip_tg:
-                    InterfaceUtil.iface_update_numa_node(node_data)
+        for node in nodes.values():
+            if node[u"type"] == NodeType.DUT and not skip_vpp:
+                InterfaceUtil.update_vpp_interface_data_on_node(node)
+            elif node[u"type"] == NodeType.TG and not skip_tg:
+                InterfaceUtil.update_tg_interface_data_on_node(node)
+            InterfaceUtil.iface_update_numa_node(node)
 
     @staticmethod
     def create_vlan_subinterface(node, interface, vlan):
         """Create VLAN sub-interface on node.
 
         :param node: Node to add VLAN subinterface on.
-        :param interface: Interface name on which create VLAN subinterface.
+        :param interface: Interface name or index on which create VLAN
+            subinterface.
         :param vlan: VLAN ID of the subinterface to be created.
         :type node: dict
-        :type interface: str
+        :type interface: str on int
         :type vlan: int
         :returns: Name and index of created subinterface.
         :rtype: tuple
         :raises RuntimeError: if it is unable to create VLAN subinterface on the
-            node.
+            node or interface cannot be converted.
         """
-        iface_key = Topology.get_interface_by_name(node, interface)
-        sw_if_index = Topology.get_interface_sw_index(node, iface_key)
-
-        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'])
+        sw_if_index = InterfaceUtil.get_interface_index(node, interface)
+
+        cmd = u"create_vlan_subif"
+        args = dict(
+            sw_if_index=sw_if_index,
+            vlan_id=int(vlan)
+        )
+        err_msg = f"Failed to create VLAN sub-interface on host {node[u'host']}"
+
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        if_key = Topology.add_new_port(node, 'vlan_subif')
+        if_key = Topology.add_new_port(node, u"vlan_subif")
         Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
         ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
         Topology.update_interface_name(node, if_key, ifc_name)
 
-        return '{ifc}.{vlan}'.format(ifc=interface, vlan=vlan), sw_if_index
+        return f"{interface}.{vlan}", sw_if_index
 
     @staticmethod
     def create_vxlan_interface(node, vni, source_ip, destination_ip):
@@ -756,31 +850,62 @@ class InterfaceUtil(object):
         :raises RuntimeError: if it is unable to create VxLAN interface on the
             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'])
+        cmd = u"vxlan_add_del_tunnel"
+        args = dict(
+            is_add=True,
+            instance=Constants.BITWISE_NON_ZERO,
+            src_address=IPAddress.create_ip_address_object(
+                ip_address(source_ip)
+            ),
+            dst_address=IPAddress.create_ip_address_object(
+                ip_address(destination_ip)
+            ),
+            mcast_sw_if_index=Constants.BITWISE_NON_ZERO,
+            encap_vrf_id=0,
+            decap_next_index=Constants.BITWISE_NON_ZERO,
+            vni=int(vni)
+        )
+        err_msg = f"Failed to create VXLAN tunnel interface " \
+            f"on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        if_key = Topology.add_new_port(node, 'vxlan_tunnel')
+        if_key = Topology.add_new_port(node, u"vxlan_tunnel")
         Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
         ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
         Topology.update_interface_name(node, if_key, ifc_name)
 
         return sw_if_index
 
+    @staticmethod
+    def set_vxlan_bypass(node, interface=None):
+        """Add the 'ip4-vxlan-bypass' graph node for a given interface.
+
+        By adding the IPv4 vxlan-bypass graph node to an interface, the node
+        checks for and validate input vxlan packet and bypass ip4-lookup,
+        ip4-local, ip4-udp-lookup nodes to speedup vxlan packet forwarding.
+        This node will cause extra overhead to for non-vxlan packets which is
+        kept at a minimum.
+
+        :param node: Node where to set VXLAN bypass.
+        :param interface: Numeric index or name string of a specific interface.
+        :type node: dict
+        :type interface: int or str
+        :raises RuntimeError: if it failed to set VXLAN bypass on interface.
+        """
+        sw_if_index = InterfaceUtil.get_interface_index(node, interface)
+
+        cmd = u"sw_interface_set_vxlan_bypass"
+        args = dict(
+            is_ipv6=False,
+            sw_if_index=sw_if_index,
+            enable=True
+        )
+        err_msg = f"Failed to set VXLAN bypass on interface " \
+            f"on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args).get_replies(err_msg)
+
     @staticmethod
     def vxlan_dump(node, interface=None):
         """Get VxLAN data for the given interface.
@@ -796,18 +921,6 @@ class InterfaceUtil(object):
         :raises TypeError: if the data type of interface is neither basestring
             nor int.
         """
-        if interface is not None:
-            sw_if_index = InterfaceUtil.get_interface_index(node, interface)
-        else:
-            sw_if_index = int(Constants.BITWISE_NON_ZERO)
-
-        cmd = 'vxlan_tunnel_dump'
-        args = dict(sw_if_index=sw_if_index)
-        err_msg = 'Failed to get VXLAN dump on host {host}'.format(
-            host=node['host'])
-        with PapiSocketExecutor(node) as papi_exec:
-            details = papi_exec.add(cmd, **args).get_details(err_msg)
-
         def process_vxlan_dump(vxlan_dump):
             """Process vxlan dump.
 
@@ -816,123 +929,39 @@ class InterfaceUtil(object):
             :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])
+            vxlan_dump[u"src_address"] = str(vxlan_dump[u"src_address"])
+            vxlan_dump[u"dst_address"] = str(vxlan_dump[u"dst_address"])
             return vxlan_dump
 
-        data = list() if interface is None else dict()
-        for vxlan_dump in details:
-            if interface is None:
-                data.append(process_vxlan_dump(vxlan_dump))
-            elif vxlan_dump['sw_if_index'] == sw_if_index:
-                data = process_vxlan_dump(vxlan_dump)
-                break
-
-        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.
-
-        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
-        """
-        cmd = 'sw_interface_vhost_user_dump'
-        err_msg = 'Failed to get vhost-user dump on host {host}'.format(
-            host=node['host'])
-        with PapiSocketExecutor(node) as papi_exec:
-            details = papi_exec.add(cmd).get_details(err_msg)
-
-        def process_vhost_dump(vhost_dump):
-            """Process vhost dump.
-
-            :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
-
-        for vhost_dump in details:
-            # In-place edits.
-            process_vhost_dump(vhost_dump)
-
-        logger.debug('Vhost-user details:\n{vhost_details}'.format(
-            vhost_details=details))
-        return details
-
-    @staticmethod
-    def tap_dump(node, name=None):
-        """Get all TAP interface data from the given node, or data about
-        a specific TAP interface.
+        if interface is not None:
+            sw_if_index = InterfaceUtil.get_interface_index(node, interface)
+        else:
+            sw_if_index = int(Constants.BITWISE_NON_ZERO)
 
-        TODO: Move to Tap.py
+        cmd = u"vxlan_tunnel_dump"
+        args = dict(
+            sw_if_index=sw_if_index
+        )
+        err_msg = f"Failed to get VXLAN dump on host {node[u'host']}"
 
-        :param node: VPP node to get data from.
-        :param name: Optional name of a specific TAP interface.
-        :type node: dict
-        :type name: str
-        :returns: Dictionary of information about a specific TAP interface, or
-            a List of dictionaries containing all TAP data for the given node.
-        :rtype: dict or list
-        """
-        cmd = 'sw_interface_tap_v2_dump'
-        err_msg = 'Failed to get TAP dump on host {host}'.format(
-            host=node['host'])
         with PapiSocketExecutor(node) as papi_exec:
-            details = papi_exec.add(cmd).get_details(err_msg)
-
-        def process_tap_dump(tap_dump):
-            """Process tap dump.
+            details = papi_exec.add(cmd, **args).get_details(err_msg)
 
-            :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 tap_dump in details:
-            if name is None:
-                data.append(process_tap_dump(tap_dump))
-            elif tap_dump.get('dev_name').rstrip('\x00') == name:
-                data = process_tap_dump(tap_dump)
+        data = list() if interface is None else dict()
+        for dump in details:
+            if interface is None:
+                data.append(process_vxlan_dump(dump))
+            elif dump[u"sw_if_index"] == sw_if_index:
+                data = process_vxlan_dump(dump)
                 break
 
-        logger.debug('TAP data:\n{tap_data}'.format(tap_data=data))
+        logger.debug(f"VXLAN data:\n{data}")
         return data
 
     @staticmethod
-    def create_subinterface(node, interface, sub_id, outer_vlan_id=None,
-                            inner_vlan_id=None, type_subif=None):
+    def create_subinterface(
+            node, interface, sub_id, outer_vlan_id=None, inner_vlan_id=None,
+            type_subif=None):
         """Create sub-interface on node. It is possible to set required
         sub-interface type and VLAN tag(s).
 
@@ -956,31 +985,42 @@ class InterfaceUtil(object):
         """
         subif_types = type_subif.split()
 
-        cmd = 'create_subif'
+        flags = 0
+        if u"no_tags" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_NO_TAGS
+        if u"one_tag" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_ONE_TAG
+        if u"two_tags" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_TWO_TAGS
+        if u"dot1ad" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_DOT1AD
+        if u"exact_match" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_EXACT_MATCH
+        if u"default_sub" in subif_types:
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_DEFAULT
+        if type_subif == u"default_sub":
+            flags = flags | SubInterfaceFlags.SUB_IF_API_FLAG_INNER_VLAN_ID_ANY\
+                    | SubInterfaceFlags.SUB_IF_API_FLAG_OUTER_VLAN_ID_ANY
+
+        cmd = u"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,
+            sub_if_flags=flags.value if hasattr(flags, u"value")
+            else int(flags),
             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'])
+            inner_vlan_id=int(inner_vlan_id) if inner_vlan_id else 0
+        )
+        err_msg = f"Failed to create sub-interface on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        if_key = Topology.add_new_port(node, 'subinterface')
+        if_key = Topology.add_new_port(node, u"subinterface")
         Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
         ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
         Topology.update_interface_name(node, if_key, ifc_name)
 
-        return '{ifc}.{s_id}'.format(ifc=interface, s_id=sub_id), sw_if_index
+        return f"{interface}.{sub_id}", sw_if_index
 
     @staticmethod
     def create_gre_tunnel_interface(node, source_ip, destination_ip):
@@ -996,21 +1036,25 @@ class InterfaceUtil(object):
         :rtype: tuple
         :raises RuntimeError: If unable to create GRE tunnel interface.
         """
-        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'])
+        cmd = u"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 = f"Failed to create GRE tunnel interface " \
+            f"on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        if_key = Topology.add_new_port(node, 'gre_tunnel')
+        if_key = Topology.add_new_port(node, u"gre_tunnel")
         Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
         ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
         Topology.update_interface_name(node, if_key, ifc_name)
@@ -1018,80 +1062,146 @@ class InterfaceUtil(object):
         return ifc_name, sw_if_index
 
     @staticmethod
-    def vpp_create_loopback(node):
+    def create_gtpu_tunnel_interface(node, teid, source_ip, destination_ip):
+        """Create GTPU interface and return sw if index of created interface.
+
+        :param node: Node where to create GTPU interface.
+        :param teid: GTPU Tunnel Endpoint Identifier.
+        :param source_ip: Source IP of a GTPU Tunnel End Point.
+        :param destination_ip: Destination IP of a GTPU Tunnel End Point.
+        :type node: dict
+        :type teid: int
+        :type source_ip: str
+        :type destination_ip: str
+        :returns: SW IF INDEX of created interface.
+        :rtype: int
+        :raises RuntimeError: if it is unable to create GTPU interface on the
+            node.
+        """
+        cmd = u"gtpu_add_del_tunnel"
+        args = dict(
+            is_add=True,
+            src_address=IPAddress.create_ip_address_object(
+                ip_address(source_ip)
+            ),
+            dst_address=IPAddress.create_ip_address_object(
+                ip_address(destination_ip)
+            ),
+            mcast_sw_if_index=Constants.BITWISE_NON_ZERO,
+            encap_vrf_id=0,
+            decap_next_index=2,
+            teid=teid
+        )
+        err_msg = f"Failed to create GTPU tunnel interface " \
+            f"on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
+
+        if_key = Topology.add_new_port(node, u"gtpu_tunnel")
+        Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
+        ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
+        Topology.update_interface_name(node, if_key, ifc_name)
+
+        return sw_if_index
+
+    @staticmethod
+    def vpp_create_loopback(node, mac=None):
         """Create loopback interface on VPP node.
 
         :param node: Node to create loopback interface on.
+        :param mac: Optional MAC address for loopback interface.
         :type node: dict
+        :type mac: str
         :returns: SW interface index.
         :rtype: int
         :raises RuntimeError: If it is not possible to create loopback on the
             node.
         """
-        cmd = 'create_loopback'
-        args = dict(mac_address=0)
-        err_msg = 'Failed to create loopback interface on host {host}'.format(
-            host=node['host'])
+        cmd = u"create_loopback_instance"
+        args = dict(
+            mac_address=L2Util.mac_to_bin(mac) if mac else 0,
+            is_specified=False,
+            user_instance=0,
+        )
+        err_msg = f"Failed to create loopback interface on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        if_key = Topology.add_new_port(node, 'loopback')
+        if_key = Topology.add_new_port(node, u"loopback")
         Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
         ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_index)
         Topology.update_interface_name(node, if_key, ifc_name)
+        if mac:
+            mac = InterfaceUtil.vpp_get_interface_mac(node, ifc_name)
+            Topology.update_interface_mac_address(node, if_key, mac)
 
         return sw_if_index
 
     @staticmethod
-    def vpp_create_bond_interface(node, mode, load_balance=None, mac=None):
+    def vpp_create_bond_interface(
+            node, mode, load_balance=None, mac=None, gso=False):
         """Create bond interface on VPP node.
 
         :param node: DUT node from topology.
         :param mode: Link bonding mode.
         :param load_balance: Load balance (optional, valid for xor and lacp
-            modes, otherwise ignored).
+            modes, otherwise ignored). Default: None.
         :param mac: MAC address to assign to the bond interface (optional).
+            Default: None.
+        :param gso: Enable GSO support (optional). Default: False.
         :type node: dict
         :type mode: str
         :type load_balance: str
         :type mac: str
+        :type gso: bool
         :returns: Interface key (name) in topology.
         :rtype: str
         :raises RuntimeError: If it is not possible to create bond interface on
             the node.
         """
-        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'])
+        cmd = u"bond_create2"
+        args = dict(
+            id=int(Constants.BITWISE_NON_ZERO),
+            use_custom_mac=bool(mac is not None),
+            mac_address=L2Util.mac_to_bin(mac) if mac else None,
+            mode=getattr(
+                LinkBondMode,
+                f"BOND_API_MODE_{mode.replace(u'-', u'_').upper()}"
+            ).value,
+            lb=0 if load_balance is None else getattr(
+                LinkBondLoadBalanceAlgo,
+                f"BOND_API_LB_ALGO_{load_balance.upper()}"
+            ).value,
+            numa_only=False,
+            enable_gso=gso
+        )
+        err_msg = f"Failed to create bond interface on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        InterfaceUtil.add_eth_interface(node, sw_if_index=sw_if_index,
-                                        ifc_pfx='eth_bond')
+        InterfaceUtil.add_eth_interface(
+            node, sw_if_index=sw_if_index, ifc_pfx=u"eth_bond"
+        )
         if_key = Topology.get_interface_by_sw_index(node, sw_if_index)
 
         return if_key
 
     @staticmethod
-    def add_eth_interface(node, ifc_name=None, sw_if_index=None, ifc_pfx=None):
+    def add_eth_interface(
+            node, ifc_name=None, sw_if_index=None, ifc_pfx=None,
+            host_if_key=None):
         """Add ethernet interface to current topology.
 
         :param node: DUT node from topology.
         :param ifc_name: Name of the interface.
         :param sw_if_index: SW interface index.
         :param ifc_pfx: Interface key prefix.
+        :param host_if_key: Host interface key from topology file.
         :type node: dict
         :type ifc_name: str
         :type sw_if_index: int
         :type ifc_pfx: str
+        :type host_if_key: str
         """
         if_key = Topology.add_new_port(node, ifc_pfx)
 
@@ -1104,42 +1214,171 @@ class InterfaceUtil(object):
         Topology.update_interface_name(node, if_key, ifc_name)
         ifc_mac = InterfaceUtil.vpp_get_interface_mac(node, sw_if_index)
         Topology.update_interface_mac_address(node, if_key, ifc_mac)
+        if host_if_key is not None:
+            Topology.set_interface_numa_node(
+                node, if_key, Topology.get_interface_numa_node(
+                    node, host_if_key
+                )
+            )
+            Topology.update_interface_pci_address(
+                node, if_key, Topology.get_interface_pci_addr(node, host_if_key)
+            )
 
     @staticmethod
-    def vpp_create_avf_interface(node, vf_pci_addr, num_rx_queues=None):
+    def vpp_create_avf_interface(
+            node, if_key, num_rx_queues=None, rxq_size=0, txq_size=0):
         """Create AVF interface on VPP node.
 
         :param node: DUT node from topology.
-        :param vf_pci_addr: Virtual Function PCI address.
+        :param if_key: Interface key from topology file of interface
+            to be bound to i40evf driver.
         :param num_rx_queues: Number of RX queues.
+        :param rxq_size: Size of RXQ (0 = Default API; 512 = Default VPP).
+        :param txq_size: Size of TXQ (0 = Default API; 512 = Default VPP).
         :type node: dict
-        :type vf_pci_addr: str
+        :type if_key: str
         :type num_rx_queues: int
-        :returns: Interface key (name) in topology.
+        :type rxq_size: int
+        :type txq_size: int
+        :returns: AVF interface key (name) in topology.
         :rtype: str
         :raises RuntimeError: If it is not possible to create AVF interface on
             the node.
         """
-        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'])
+        PapiSocketExecutor.run_cli_cmd(
+            node, u"set logging class avf level debug"
+        )
+
+        cmd = u"avf_create"
+        vf_pci_addr = Topology.get_interface_pci_addr(node, if_key)
+        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=rxq_size,
+            txq_size=txq_size
+        )
+        err_msg = f"Failed to create AVF interface on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
 
-        InterfaceUtil.add_eth_interface(node, sw_if_index=sw_if_index,
-                                        ifc_pfx='eth_avf')
-        if_key = Topology.get_interface_by_sw_index(node, sw_if_index)
+        InterfaceUtil.add_eth_interface(
+            node, sw_if_index=sw_if_index, ifc_pfx=u"eth_avf",
+            host_if_key=if_key
+        )
 
-        return if_key
+        return Topology.get_interface_by_sw_index(node, sw_if_index)
 
     @staticmethod
-    def vpp_enslave_physical_interface(node, interface, bond_if):
-        """Enslave physical interface to bond interface on VPP node.
+    def vpp_create_af_xdp_interface(
+            node, if_key, num_rx_queues=None, rxq_size=0, txq_size=0,
+            mode=u"auto"):
+        """Create AF_XDP interface on VPP node.
+
+        :param node: DUT node from topology.
+        :param if_key: Physical interface key from topology file of interface
+            to be bound to compatible driver.
+        :param num_rx_queues: Number of RX queues. (Optional, Default: none)
+        :param rxq_size: Size of RXQ (0 = Default API; 512 = Default VPP).
+        :param txq_size: Size of TXQ (0 = Default API; 512 = Default VPP).
+        :param mode: AF_XDP interface mode. (Optional, Default: auto).
+        :type node: dict
+        :type if_key: str
+        :type num_rx_queues: int
+        :type rxq_size: int
+        :type txq_size: int
+        :type mode: str
+        :returns: Interface key (name) in topology file.
+        :rtype: str
+        :raises RuntimeError: If it is not possible to create AF_XDP interface
+            on the node.
+        """
+        PapiSocketExecutor.run_cli_cmd(
+            node, u"set logging class af_xdp level debug"
+        )
+
+        cmd = u"af_xdp_create"
+        pci_addr = Topology.get_interface_pci_addr(node, if_key)
+        args = dict(
+            name=InterfaceUtil.pci_to_eth(node, pci_addr),
+            host_if=InterfaceUtil.pci_to_eth(node, pci_addr),
+            rxq_num=int(num_rx_queues) if num_rx_queues else 0,
+            rxq_size=rxq_size,
+            txq_size=txq_size,
+            mode=getattr(AfXdpMode, f"AF_XDP_API_MODE_{mode.upper()}").value
+        )
+        err_msg = f"Failed to create AF_XDP interface on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
+
+        InterfaceUtil.vpp_set_interface_mac(
+            node, sw_if_index, Topology.get_interface_mac(node, if_key)
+        )
+        InterfaceUtil.add_eth_interface(
+            node, sw_if_index=sw_if_index, ifc_pfx=u"eth_af_xdp",
+            host_if_key=if_key
+        )
+
+        return Topology.get_interface_by_sw_index(node, sw_if_index)
+
+    @staticmethod
+    def vpp_create_rdma_interface(
+            node, if_key, num_rx_queues=None, rxq_size=0, txq_size=0,
+            mode=u"auto"):
+        """Create RDMA interface on VPP node.
+
+        :param node: DUT node from topology.
+        :param if_key: Physical interface key from topology file of interface
+            to be bound to rdma-core driver.
+        :param num_rx_queues: Number of RX queues.
+        :param rxq_size: Size of RXQ (0 = Default API; 512 = Default VPP).
+        :param txq_size: Size of TXQ (0 = Default API; 512 = Default VPP).
+        :param mode: RDMA interface mode - auto/ibv/dv.
+        :type node: dict
+        :type if_key: str
+        :type num_rx_queues: int
+        :type rxq_size: int
+        :type txq_size: int
+        :type mode: str
+        :returns: Interface key (name) in topology file.
+        :rtype: str
+        :raises RuntimeError: If it is not possible to create RDMA interface on
+            the node.
+        """
+        PapiSocketExecutor.run_cli_cmd(
+            node, u"set logging class rdma level debug"
+        )
+
+        cmd = u"rdma_create_v2"
+        pci_addr = Topology.get_interface_pci_addr(node, if_key)
+        args = dict(
+            name=InterfaceUtil.pci_to_eth(node, pci_addr),
+            host_if=InterfaceUtil.pci_to_eth(node, pci_addr),
+            rxq_num=int(num_rx_queues) if num_rx_queues else 0,
+            rxq_size=rxq_size,
+            txq_size=txq_size,
+            mode=getattr(RdmaMode, f"RDMA_API_MODE_{mode.upper()}").value,
+            # Note: Set True for non-jumbo packets.
+            no_multi_seg=False,
+            max_pktlen=0,
+        )
+        err_msg = f"Failed to create RDMA interface on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            sw_if_index = papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
+
+        InterfaceUtil.vpp_set_interface_mac(
+            node, sw_if_index, Topology.get_interface_mac(node, if_key)
+        )
+        InterfaceUtil.add_eth_interface(
+            node, sw_if_index=sw_if_index, ifc_pfx=u"eth_rdma",
+            host_if_key=if_key
+        )
+
+        return Topology.get_interface_by_sw_index(node, sw_if_index)
+
+    @staticmethod
+    def vpp_add_bond_member(node, interface, bond_if):
+        """Add member interface to bond interface on VPP node.
 
         :param node: DUT node from topology.
         :param interface: Physical interface key from topology file.
@@ -1147,19 +1386,18 @@ class InterfaceUtil(object):
         :type node: dict
         :type 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 add member to bond
+            interface on the node.
         """
-        cmd = 'bond_enslave'
+        cmd = u"bond_add_member"
         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'])
+            is_passive=False,
+            is_long_timeout=False
+        )
+        err_msg = f"Failed to add member {interface} to bond interface " \
+            f"{bond_if} on host {node[u'host']}"
         with PapiSocketExecutor(node) as papi_exec:
             papi_exec.add(cmd, **args).get_reply(err_msg)
 
@@ -1172,39 +1410,41 @@ class InterfaceUtil(object):
         :type node: dict
         :type verbose: bool
         """
-        cmd = 'sw_interface_bond_dump'
-        err_msg = 'Failed to get bond interface dump on host {host}'.format(
-            host=node['host'])
+        cmd = u"sw_bond_interface_dump"
+        err_msg = f"Failed to get bond interface dump on host {node[u'host']}"
 
-        data = ('Bond data on node {host}:\n'.format(host=node['host']))
+        data = f"Bond data on node {node[u'host']}:\n"
         with PapiSocketExecutor(node) as papi_exec:
             details = papi_exec.add(cmd).get_details(err_msg)
 
         for bond in details:
-            data += ('{b}\n'.format(b=bond['interface_name'].rstrip('\x00')))
-            data += ('  mode: {m}\n'.format(m=LinkBondMode(
-                bond['mode']).name.lower()))
-            data += ('  load balance: {lb}\n'.format(lb=LinkBondLoadBalance(
-                bond['lb']).name.lower()))
-            data += ('  number of active slaves: {n}\n'.format(
-                n=bond['active_slaves']))
+            data += f"{bond[u'interface_name']}\n"
+            data += u"  mode: {m}\n".format(
+                m=bond[u"mode"].name.replace(u"BOND_API_MODE_", u"").lower()
+            )
+            data += u"  load balance: {lb}\n".format(
+                lb=bond[u"lb"].name.replace(u"BOND_API_LB_ALGO_", u"").lower()
+            )
+            data += f"  number of active members: {bond[u'active_members']}\n"
             if verbose:
-                slave_data = InterfaceUtil.vpp_bond_slave_dump(
+                member_data = InterfaceUtil.vpp_bond_member_dump(
                     node, Topology.get_interface_by_sw_index(
-                        node, bond['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=bond['slaves']))
+                        node, bond[u"sw_if_index"]
+                    )
+                )
+                for member in member_data:
+                    if not member[u"is_passive"]:
+                        data += f"    {member[u'interface_name']}\n"
+            data += f"  number of members: {bond[u'members']}\n"
             if verbose:
-                for slave in slave_data:
-                    data += ('    {s}\n'.format(s=slave['interface_name']))
-            data += ('  interface id: {i}\n'.format(i=bond['id']))
-            data += ('  sw_if_index: {i}\n'.format(i=bond['sw_if_index']))
+                for member in member_data:
+                    data += f"    {member[u'interface_name']}\n"
+            data += f"  interface id: {bond[u'id']}\n"
+            data += f"  sw_if_index: {bond[u'sw_if_index']}\n"
         logger.info(data)
 
     @staticmethod
-    def vpp_bond_slave_dump(node, interface):
+    def vpp_bond_member_dump(node, interface):
         """Get bond interface slave(s) data on VPP node.
 
         :param node: DUT node from topology.
@@ -1214,32 +1454,16 @@ class InterfaceUtil(object):
         :returns: Bond slave interface data.
         :rtype: dict
         """
-        cmd = 'sw_interface_slave_dump'
-        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'])
+        cmd = u"sw_member_interface_dump"
+        args = dict(
+            sw_if_index=Topology.get_interface_sw_index(node, interface)
+        )
+        err_msg = f"Failed to get slave dump on host {node[u'host']}"
 
         with PapiSocketExecutor(node) as papi_exec:
             details = papi_exec.add(cmd, **args).get_details(err_msg)
 
-        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
-
-        for slave_dump in details:
-            # In-place edits.
-            process_slave_dump(slave_dump)
-
-        logger.debug('Slave data:\n{slave_data}'.format(slave_data=details))
+        logger.debug(f"Member data:\n{details}")
         return details
 
     @staticmethod
@@ -1252,12 +1476,12 @@ class InterfaceUtil(object):
         :type verbose: bool
         """
         for node_data in nodes.values():
-            if node_data['type'] == NodeType.DUT:
+            if node_data[u"type"] == NodeType.DUT:
                 InterfaceUtil.vpp_show_bond_data_on_node(node_data, verbose)
 
     @staticmethod
-    def vpp_enable_input_acl_interface(node, interface, ip_version,
-                                       table_index):
+    def vpp_enable_input_acl_interface(
+            node, interface, ip_version, table_index):
         """Enable input acl on interface.
 
         :param node: VPP node to setup interface for input acl.
@@ -1269,18 +1493,17 @@ class InterfaceUtil(object):
         :type ip_version: str
         :type table_index: int
         """
-        cmd = 'input_acl_set_interface'
+        cmd = u"input_acl_set_interface"
         args = dict(
             sw_if_index=InterfaceUtil.get_interface_index(node, interface),
-            ip4_table_index=table_index if ip_version == 'ip4'
+            ip4_table_index=table_index if ip_version == u"ip4"
             else Constants.BITWISE_NON_ZERO,
-            ip6_table_index=table_index if ip_version == 'ip6'
+            ip6_table_index=table_index if ip_version == u"ip6"
             else Constants.BITWISE_NON_ZERO,
-            l2_table_index=table_index if ip_version == 'l2'
+            l2_table_index=table_index if ip_version == u"l2"
             else Constants.BITWISE_NON_ZERO,
             is_add=1)
-        err_msg = 'Failed to enable input acl on interface {ifc}'.format(
-            ifc=interface)
+        err_msg = f"Failed to enable input acl on interface {interface}"
         with PapiSocketExecutor(node) as papi_exec:
             papi_exec.add(cmd, **args).get_reply(err_msg)
 
@@ -1297,15 +1520,16 @@ class InterfaceUtil(object):
         :returns: Classify table name.
         :rtype: str
         """
-        if isinstance(interface, basestring):
+        if isinstance(interface, str):
             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)
+        cmd = u"classify_table_by_interface"
+        args = dict(
+            sw_if_index=sw_if_index
+        )
+        err_msg = f"Failed to get classify table name by interface {interface}"
         with PapiSocketExecutor(node) as papi_exec:
             reply = papi_exec.add(cmd, **args).get_reply(err_msg)
 
@@ -1315,6 +1539,8 @@ class InterfaceUtil(object):
     def get_sw_if_index(node, interface_name):
         """Get sw_if_index for the given interface from actual interface dump.
 
+        FIXME: Delete and redirect callers to vpp_get_interface_sw_index.
+
         :param node: VPP node to get interface data from.
         :param interface_name: Name of the specific interface.
         :type node: dict
@@ -1323,8 +1549,9 @@ class InterfaceUtil(object):
         :rtype: str
         """
         interface_data = InterfaceUtil.vpp_get_interface_data(
-            node, interface=interface_name)
-        return interface_data.get('sw_if_index')
+            node, interface=interface_name
+        )
+        return interface_data.get(u"sw_if_index")
 
     @staticmethod
     def vxlan_gpe_dump(node, interface_name=None):
@@ -1340,19 +1567,6 @@ class InterfaceUtil(object):
             interfaces.
         :rtype: dict or list
         """
-        if interface_name is not None:
-            sw_if_index = InterfaceUtil.get_interface_index(
-                node, interface_name)
-        else:
-            sw_if_index = int(Constants.BITWISE_NON_ZERO)
-
-        cmd = 'vxlan_gpe_tunnel_dump'
-        args = dict(sw_if_index=sw_if_index)
-        err_msg = 'Failed to get VXLAN-GPE dump on host {host}'.format(
-            host=node['host'])
-        with PapiSocketExecutor(node) as papi_exec:
-            details = papi_exec.add(cmd, **args).get_details(err_msg)
-
         def process_vxlan_gpe_dump(vxlan_dump):
             """Process vxlan_gpe dump.
 
@@ -1361,28 +1575,38 @@ class InterfaceUtil(object):
             :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'])
+            if vxlan_dump[u"is_ipv6"]:
+                vxlan_dump[u"local"] = ip_address(vxlan_dump[u"local"])
+                vxlan_dump[u"remote"] = ip_address(vxlan_dump[u"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])
+                vxlan_dump[u"local"] = ip_address(vxlan_dump[u"local"][0:4])
+                vxlan_dump[u"remote"] = ip_address(vxlan_dump[u"remote"][0:4])
             return vxlan_dump
 
+        if interface_name is not None:
+            sw_if_index = InterfaceUtil.get_interface_index(
+                node, interface_name
+            )
+        else:
+            sw_if_index = int(Constants.BITWISE_NON_ZERO)
+
+        cmd = u"vxlan_gpe_tunnel_dump"
+        args = dict(
+            sw_if_index=sw_if_index
+        )
+        err_msg = f"Failed to get VXLAN-GPE dump on host {node[u'host']}"
+        with PapiSocketExecutor(node) as papi_exec:
+            details = papi_exec.add(cmd, **args).get_details(err_msg)
+
         data = list() if interface_name is None else dict()
-        for vxlan_dump in details:
+        for dump in details:
             if interface_name is None:
-                data.append(process_vxlan_gpe_dump(vxlan_dump))
-            elif vxlan_dump['sw_if_index'] == sw_if_index:
-                data = process_vxlan_gpe_dump(vxlan_dump)
+                data.append(process_vxlan_gpe_dump(dump))
+            elif dump[u"sw_if_index"] == sw_if_index:
+                data = process_vxlan_gpe_dump(dump)
                 break
 
-        logger.debug('VXLAN-GPE data:\n{vxlan_gpe_data}'.format(
-            vxlan_gpe_data=data))
+        logger.debug(f"VXLAN-GPE data:\n{data}")
         return data
 
     @staticmethod
@@ -1398,19 +1622,19 @@ class InterfaceUtil(object):
         :type table_id: int
         :type ipv6: bool
         """
-        cmd = 'sw_interface_set_table'
+        cmd = u"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)
+            is_ipv6=ipv6,
+            vrf_id=int(table_id)
+        )
+        err_msg = f"Failed to assign interface {interface} to FIB table"
         with PapiSocketExecutor(node) as papi_exec:
             papi_exec.add(cmd, **args).get_reply(err_msg)
 
     @staticmethod
-    def set_linux_interface_mac(node, interface, mac, namespace=None,
-                                vf_id=None):
+    def set_linux_interface_mac(
+            node, interface, mac, namespace=None, vf_id=None):
         """Set MAC address for interface in linux.
 
         :param node: Node where to execute command.
@@ -1424,17 +1648,39 @@ class InterfaceUtil(object):
         :type namespace: str
         :type vf_id: int
         """
-        mac_str = 'vf {vf_id} mac {mac}'.format(vf_id=vf_id, mac=mac) \
-            if vf_id is not None else 'address {mac}'.format(mac=mac)
-        ns_str = 'ip netns exec {ns}'.format(ns=namespace) if namespace else ''
+        mac_str = f"vf {vf_id} mac {mac}" if vf_id is not None \
+            else f"address {mac}"
+        ns_str = f"ip netns exec {namespace}" if namespace else u""
+
+        cmd = f"{ns_str} ip link set {interface} {mac_str}"
+        exec_cmd_no_error(node, cmd, sudo=True)
+
+    @staticmethod
+    def set_linux_interface_promisc(
+            node, interface, namespace=None, vf_id=None, state=u"on"):
+        """Set promisc state for interface in linux.
+
+        :param node: Node where to execute command.
+        :param interface: Interface in namespace.
+        :param namespace: Exec command in namespace. (Optional, Default: None)
+        :param vf_id: Virtual Function id. (Optional, Default: None)
+        :param state: State of feature. (Optional, Default: on)
+        :type node: dict
+        :type interface: str
+        :type namespace: str
+        :type vf_id: int
+        :type state: str
+        """
+        promisc_str = f"vf {vf_id} promisc {state}" if vf_id is not None \
+            else f"promisc {state}"
+        ns_str = f"ip netns exec {namespace}" if namespace else u""
 
-        cmd = ('{ns} ip link set {interface} {mac}'.
-               format(ns=ns_str, interface=interface, mac=mac_str))
+        cmd = f"{ns_str} ip link set dev {interface} {promisc_str}"
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
-    def set_linux_interface_trust_on(node, interface, namespace=None,
-                                     vf_id=None):
+    def set_linux_interface_trust_on(
+            node, interface, namespace=None, vf_id=None):
         """Set trust on (promisc) for interface in linux.
 
         :param node: Node where to execute command.
@@ -1446,17 +1692,15 @@ class InterfaceUtil(object):
         :type namespace: str
         :type vf_id: int
         """
-        trust_str = 'vf {vf_id} trust on'.format(vf_id=vf_id) \
-            if vf_id is not None else 'trust on'
-        ns_str = 'ip netns exec {ns}'.format(ns=namespace) if namespace else ''
+        trust_str = f"vf {vf_id} trust on" if vf_id is not None else u"trust on"
+        ns_str = f"ip netns exec {namespace}" if namespace else u""
 
-        cmd = ('{ns} ip link set dev {interface} {trust}'.
-               format(ns=ns_str, interface=interface, trust=trust_str))
+        cmd = f"{ns_str} ip link set dev {interface} {trust_str}"
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
-    def set_linux_interface_spoof_off(node, interface, namespace=None,
-                                      vf_id=None):
+    def set_linux_interface_spoof_off(
+            node, interface, namespace=None, vf_id=None):
         """Set spoof off for interface in linux.
 
         :param node: Node where to execute command.
@@ -1468,22 +1712,83 @@ class InterfaceUtil(object):
         :type namespace: str
         :type vf_id: int
         """
-        spoof_str = 'vf {vf_id} spoof off'.format(vf_id=vf_id) \
-            if vf_id is not None else 'spoof off'
-        ns_str = 'ip netns exec {ns}'.format(ns=namespace) if namespace else ''
+        spoof_str = f"vf {vf_id} spoof off" if vf_id is not None \
+            else u"spoof off"
+        ns_str = f"ip netns exec {namespace}" if namespace else u""
 
-        cmd = ('{ns} ip link set dev {interface} {spoof}'.
-               format(ns=ns_str, interface=interface, spoof=spoof_str))
+        cmd = f"{ns_str} ip link set dev {interface} {spoof_str}"
         exec_cmd_no_error(node, cmd, sudo=True)
 
     @staticmethod
-    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.
+    def set_linux_interface_state(
+            node, interface, namespace=None, state=u"up"):
+        """Set operational state for interface in linux.
+
+        :param node: Node where to execute command.
+        :param interface: Interface in namespace.
+        :param namespace: Execute command in namespace. Optional
+        :param state: Up/Down.
+        :type node: dict
+        :type interface: str
+        :type namespace: str
+        :type state: str
+        """
+        ns_str = f"ip netns exec {namespace}" if namespace else u""
+
+        cmd = f"{ns_str} ip link set dev {interface} {state}"
+        exec_cmd_no_error(node, cmd, sudo=True)
+
+    @staticmethod
+    def init_interface(node, ifc_key, driver, numvfs=0, osi_layer=u"L2"):
+        """Init PCI device. Check driver compatibility and bind to proper
+        drivers. Optionally create NIC VFs.
 
         :param node: DUT node.
         :param ifc_key: Interface key from topology file.
-        :param numvfs: Number of VFs to initialize, 0 - disable the VFs.
+        :param driver: Base driver to use.
+        :param numvfs: Number of VIFs to initialize, 0 - disable the VIFs.
+        :param osi_layer: OSI Layer type to initialize TG with.
+            Default value "L2" sets linux interface spoof off.
+        :type node: dict
+        :type ifc_key: str
+        :type driver: str
+        :type numvfs: int
+        :type osi_layer: str
+        :returns: Virtual Function topology interface keys.
+        :rtype: list
+        :raises RuntimeError: If a reason preventing initialization is found.
+        """
+        kernel_driver = Topology.get_interface_driver(node, ifc_key)
+        vf_keys = []
+        if driver == u"avf":
+            if kernel_driver not in (
+                    u"ice", u"iavf", u"i40e", u"i40evf"):
+                raise RuntimeError(
+                    f"AVF needs ice or i40e compatible driver, not "
+                    f"{kernel_driver} at node {node[u'host']} ifc {ifc_key}"
+                )
+            vf_keys = InterfaceUtil.init_generic_interface(
+                node, ifc_key, numvfs=numvfs, osi_layer=osi_layer
+            )
+        elif driver == u"af_xdp":
+            if kernel_driver not in (
+                    u"ice", u"iavf", u"i40e", u"i40evf", u"mlx5_core"):
+                raise RuntimeError(
+                    f"AF_XDP needs ice or i40e or rdma compatible driver, not "
+                    f"{kernel_driver} at node {node[u'host']} ifc {ifc_key}"
+                )
+            vf_keys = InterfaceUtil.init_generic_interface(
+                node, ifc_key, numvfs=numvfs, osi_layer=osi_layer
+            )
+        return vf_keys
+
+    @staticmethod
+    def init_generic_interface(node, ifc_key, numvfs=0, osi_layer=u"L2"):
+        """Init PCI device. Bind to proper drivers. Optionally create NIC VFs.
+
+        :param node: DUT node.
+        :param ifc_key: Interface key from topology file.
+        :param numvfs: Number of VIFs to initialize, 0 - disable the VIFs.
         :param osi_layer: OSI Layer type to initialize TG with.
             Default value "L2" sets linux interface spoof off.
         :type node: dict
@@ -1499,12 +1804,9 @@ class InterfaceUtil(object):
         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'\:'))
+            node, pf_pci_addr.replace(u":", r"\:"))
+        pf_dev = f"`basename /sys/bus/pci/devices/{pf_pci_addr}/net/*`"
 
         VPPUtil.stop_vpp_service(node)
         if current_driver != kernel_driver:
@@ -1516,37 +1818,53 @@ class InterfaceUtil(object):
             # Bind to kernel driver.
             DUTSetup.pci_driver_bind(node, pf_pci_addr, kernel_driver)
 
-        # Initialize PCI VFs
+        # Initialize PCI VFs.
         DUTSetup.set_sriov_numvfs(node, pf_pci_addr, numvfs)
 
+        if not numvfs:
+            if osi_layer == u"L2":
+                InterfaceUtil.set_linux_interface_promisc(node, pf_dev)
+
         vf_ifc_keys = []
         # Set MAC address and bind each virtual function to uio driver.
         for vf_id in range(numvfs):
-            vf_mac_addr = ":".join([pf_mac_addr[0], pf_mac_addr[2],
-                                    pf_mac_addr[3], pf_mac_addr[4],
-                                    pf_mac_addr[5], "{:02x}".format(vf_id)])
-
-            pf_dev = '`basename /sys/bus/pci/devices/{pci}/net/*`'.\
-                format(pci=pf_pci_addr)
-            InterfaceUtil.set_linux_interface_trust_on(node, pf_dev,
-                                                       vf_id=vf_id)
-            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,
-                                                  vf_id=vf_id)
+            vf_mac_addr = u":".join(
+                [pf_mac_addr[0], pf_mac_addr[2], pf_mac_addr[3], pf_mac_addr[4],
+                 pf_mac_addr[5], f"{vf_id:02x}"
+                 ]
+            )
+
+            InterfaceUtil.set_linux_interface_trust_on(
+                node, pf_dev, vf_id=vf_id
+            )
+            if osi_layer == u"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, vf_id=vf_id
+            )
+            InterfaceUtil.set_linux_interface_state(
+                node, pf_dev, state=u"up"
+            )
 
             DUTSetup.pci_vf_driver_unbind(node, pf_pci_addr, vf_id)
             DUTSetup.pci_vf_driver_bind(node, pf_pci_addr, vf_id, uio_driver)
 
             # Add newly created ports into topology file
-            vf_ifc_name = '{pf_if_key}_vf'.format(pf_if_key=ifc_key)
+            vf_ifc_name = f"{ifc_key}_vif"
             vf_pci_addr = DUTSetup.get_virtfn_pci_addr(node, pf_pci_addr, vf_id)
             vf_ifc_key = Topology.add_new_port(node, vf_ifc_name)
-            Topology.update_interface_name(node, vf_ifc_key,
-                                           vf_ifc_name+str(vf_id+1))
+            Topology.update_interface_name(
+                node, vf_ifc_key, vf_ifc_name+str(vf_id+1)
+            )
             Topology.update_interface_mac_address(node, vf_ifc_key, vf_mac_addr)
             Topology.update_interface_pci_address(node, vf_ifc_key, vf_pci_addr)
+            Topology.set_interface_numa_node(
+                node, vf_ifc_key, Topology.get_interface_numa_node(
+                    node, ifc_key
+                )
+            )
             vf_ifc_keys.append(vf_ifc_key)
 
         return vf_ifc_keys
@@ -1560,19 +1878,31 @@ class InterfaceUtil(object):
         :returns: Thread mapping information as a list of dictionaries.
         :rtype: list
         """
-        cmd = 'sw_interface_rx_placement_dump'
-        err_msg = "Failed to run '{cmd}' PAPI command on host {host}!".format(
-            cmd=cmd, host=node['host'])
+        cmd = u"sw_interface_rx_placement_dump"
+        err_msg = f"Failed to run '{cmd}' PAPI command on host {node[u'host']}!"
         with PapiSocketExecutor(node) as papi_exec:
-            for ifc in node['interfaces'].values():
-                if ifc['vpp_sw_index'] is not None:
-                    papi_exec.add(cmd, sw_if_index=ifc['vpp_sw_index'])
+            for ifc in node[u"interfaces"].values():
+                if ifc[u"vpp_sw_index"] is not None:
+                    papi_exec.add(cmd, sw_if_index=ifc[u"vpp_sw_index"])
             details = papi_exec.get_details(err_msg)
-        return sorted(details, key=lambda k: k['sw_if_index'])
+        return sorted(details, key=lambda k: k[u"sw_if_index"])
 
     @staticmethod
-    def vpp_sw_interface_set_rx_placement(node, sw_if_index, queue_id,
-                                          worker_id):
+    def vpp_sw_interface_rx_placement_dump_on_all_duts(nodes):
+        """Dump VPP interface RX placement on all given nodes.
+
+        :param nodes: Nodes to run command on.
+        :type nodes: dict
+        :returns: Thread mapping information as a list of dictionaries.
+        :rtype: list
+        """
+        for node in nodes.values():
+            if node[u"type"] == NodeType.DUT:
+                InterfaceUtil.vpp_sw_interface_rx_placement_dump(node)
+
+    @staticmethod
+    def vpp_sw_interface_set_rx_placement(
+            node, sw_if_index, queue_id, worker_id):
         """Set interface RX placement to worker on node.
 
         :param node: Node to run command on.
@@ -1586,47 +1916,78 @@ class InterfaceUtil(object):
         :raises RuntimeError: If failed to run command on host or if no API
             reply received.
         """
-        cmd = 'sw_interface_set_rx_placement'
-        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)
+        cmd = u"sw_interface_set_rx_placement"
+        err_msg = f"Failed to set interface RX placement to worker " \
+            f"on host {node[u'host']}!"
+        args = dict(
+            sw_if_index=sw_if_index,
+            queue_id=queue_id,
+            worker_id=worker_id,
+            is_main=False
+        )
         with PapiSocketExecutor(node) as papi_exec:
             papi_exec.add(cmd, **args).get_reply(err_msg)
 
     @staticmethod
-    def vpp_round_robin_rx_placement(node, prefix):
+    def vpp_round_robin_rx_placement(
+            node, prefix, dp_worker_limit=None):
         """Set Round Robin interface RX placement on all worker threads
         on node.
 
+        If specified, dp_core_limit limits the number of physical cores used
+        for data plane I/O work. Other cores are presumed to do something else,
+        e.g. asynchronous crypto processing.
+        None means all workers are used for data plane work.
+        Note this keyword specifies workers, not cores.
+
         :param node: Topology nodes.
         :param prefix: Interface name prefix.
+        :param dp_worker_limit: How many cores for data plane work.
         :type node: dict
         :type prefix: str
+        :type dp_worker_limit: Optional[int]
         """
         worker_id = 0
         worker_cnt = len(VPPUtil.vpp_show_threads(node)) - 1
+        if dp_worker_limit is not None:
+            worker_cnt = min(worker_cnt, dp_worker_limit)
         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'] \
-                    and prefix in interface['name']:
+            for interface in node[u"interfaces"].values():
+                if placement[u"sw_if_index"] == interface[u"vpp_sw_index"] \
+                    and prefix in interface[u"name"]:
                     InterfaceUtil.vpp_sw_interface_set_rx_placement(
-                        node, placement['sw_if_index'], placement['queue_id'],
-                        worker_id % worker_cnt)
+                        node, placement[u"sw_if_index"], placement[u"queue_id"],
+                        worker_id % worker_cnt
+                    )
                     worker_id += 1
 
     @staticmethod
-    def vpp_round_robin_rx_placement_on_all_duts(nodes, prefix):
+    def vpp_round_robin_rx_placement_on_all_duts(
+            nodes, prefix, dp_core_limit=None):
         """Set Round Robin interface RX placement on all worker threads
         on all DUTs.
 
+        If specified, dp_core_limit limits the number of physical cores used
+        for data plane I/O work. Other cores are presumed to do something else,
+        e.g. asynchronous crypto processing.
+        None means all cores are used for data plane work.
+        Note this keyword specifies cores, not workers.
+
         :param nodes: Topology nodes.
         :param prefix: Interface name prefix.
+        :param dp_worker_limit: How many cores for data plane work.
         :type nodes: dict
         :type prefix: str
+        :type dp_worker_limit: Optional[int]
         """
         for node in nodes.values():
-            if node['type'] == NodeType.DUT:
-                InterfaceUtil.vpp_round_robin_rx_placement(node, prefix)
+            if node[u"type"] == NodeType.DUT:
+                dp_worker_limit = CpuUtils.worker_count_from_cores_and_smt(
+                    phy_cores=dp_core_limit,
+                    smt_used=CpuUtils.is_smt_enabled(node[u"cpuinfo"]),
+                )
+                InterfaceUtil.vpp_round_robin_rx_placement(
+                    node, prefix, dp_worker_limit
+                )