tests: Use errno value rather than a specific int

[vpp.git] / test / test_vxlan.py

diff --git a/test/test_vxlan.py b/test/test_vxlan.py
index ee829a3..876664d 100644 (file)
--- a/test/test_vxlan.py
+++ b/test/test_vxlan.py
@@ -1,19 +1,27 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3

 
 import socket
 
 import socket

-from util import ip4n_range
+from util import ip4_range, reassemble4

 import unittest
 import unittest

-from framework import VppTestCase, VppTestRunner
+from framework import VppTestCase
+from asfframework import VppTestRunner

 from template_bd import BridgeDomain
 
 from scapy.layers.l2 import Ether
 from template_bd import BridgeDomain
 
 from scapy.layers.l2 import Ether

+from scapy.layers.l2 import ARP
+from scapy.packet import Raw, bind_layers

 from scapy.layers.inet import IP, UDP
 from scapy.layers.vxlan import VXLAN
 from scapy.layers.inet import IP, UDP
 from scapy.layers.vxlan import VXLAN

-from scapy.utils import atol
+
+import util
+from vpp_ip_route import VppIpRoute, VppRoutePath
+from vpp_vxlan_tunnel import VppVxlanTunnel
+from vpp_ip import INVALID_INDEX
+from vpp_neighbor import VppNeighbor

 
 
 class TestVxlan(BridgeDomain, VppTestCase):
 
 
 class TestVxlan(BridgeDomain, VppTestCase):

-    """ VXLAN Test Case """
+    """VXLAN Test Case"""

 
     def __init__(self, *args):
         BridgeDomain.__init__(self)
 
     def __init__(self, *args):
         BridgeDomain.__init__(self)


@@ -24,29 +32,37 @@ class TestVxlan(BridgeDomain, VppTestCase):
         Encapsulate the original payload frame by adding VXLAN header with its
         UDP, IP and Ethernet fields
         """
         Encapsulate the original payload frame by adding VXLAN header with its
         UDP, IP and Ethernet fields
         """

-        return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
-                IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
-                UDP(sport=self.dport, dport=self.dport, chksum=0) /
-                VXLAN(vni=vni, flags=self.flags) /
-                pkt)
+        return (
+            Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+            / IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4)
+            / UDP(sport=self.dport, dport=self.dport, chksum=0)
+            / VXLAN(vni=vni, flags=self.flags)
+            / pkt
+        )
+
+    def ip_range(self, start, end):
+        """range of remote ip's"""
+        return ip4_range(self.pg0.remote_ip4, start, end)

 
     def encap_mcast(self, pkt, src_ip, src_mac, vni):
         """
         Encapsulate the original payload frame by adding VXLAN header with its
         UDP, IP and Ethernet fields
         """
 
     def encap_mcast(self, pkt, src_ip, src_mac, vni):
         """
         Encapsulate the original payload frame by adding VXLAN header with its
         UDP, IP and Ethernet fields
         """

-        return (Ether(src=src_mac, dst=self.mcast_mac) /
-                IP(src=src_ip, dst=self.mcast_ip4) /
-                UDP(sport=self.dport, dport=self.dport, chksum=0) /
-                VXLAN(vni=vni, flags=self.flags) /
-                pkt)
+        return (
+            Ether(src=src_mac, dst=self.mcast_mac)
+            / IP(src=src_ip, dst=self.mcast_ip4)
+            / UDP(sport=self.dport, dport=self.dport, chksum=0)
+            / VXLAN(vni=vni, flags=self.flags)
+            / pkt
+        )

 
     def decapsulate(self, pkt):
         """
         Decapsulate the original payload frame by removing VXLAN header
         """
         # check if is set I flag
 
     def decapsulate(self, pkt):
         """
         Decapsulate the original payload frame by removing VXLAN header
         """
         # check if is set I flag

-        self.assertEqual(pkt[VXLAN].flags, int('0x8', 16))
+        self.assertEqual(pkt[VXLAN].flags, int("0x8", 16))

         return pkt[VXLAN].payload
 
     # Method for checking VXLAN encapsulation.
         return pkt[VXLAN].payload
 
     # Method for checking VXLAN encapsulation.


@@ -70,77 +86,105 @@ class TestVxlan(BridgeDomain, VppTestCase):
                 self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
         # Verify UDP destination port is VXLAN 4789, source UDP port could be
         #  arbitrary.
                 self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
         # Verify UDP destination port is VXLAN 4789, source UDP port could be
         #  arbitrary.

-        self.assertEqual(pkt[UDP].dport, type(self).dport)
-        # TODO: checksum check
+        self.assertEqual(pkt[UDP].dport, self.dport)
+        # Verify UDP checksum
+        self.assert_udp_checksum_valid(pkt)

         # Verify VNI
         self.assertEqual(pkt[VXLAN].vni, vni)
 
     @classmethod
         # Verify VNI
         self.assertEqual(pkt[VXLAN].vni, vni)
 
     @classmethod

-    def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels):
+    def create_vxlan_flood_test_bd(cls, vni, n_ucast_tunnels, port):

         # Create 10 ucast vxlan tunnels under bd
         ip_range_start = 10
         ip_range_end = ip_range_start + n_ucast_tunnels
         # Create 10 ucast vxlan tunnels under bd
         ip_range_start = 10
         ip_range_end = ip_range_start + n_ucast_tunnels

-        next_hop_address = cls.pg0.remote_ip4n
-        for dest_ip4n in ip4n_range(next_hop_address, ip_range_start,
-                                    ip_range_end):
-            # add host route so dest_ip4n will not be resolved
-            cls.vapi.ip_add_del_route(dest_ip4n, 32, next_hop_address)
-            r = cls.vapi.vxlan_add_del_tunnel(
-                src_addr=cls.pg0.local_ip4n,
-                dst_addr=dest_ip4n,
-                vni=vni)
+        next_hop_address = cls.pg0.remote_ip4
+        for dest_ip4 in ip4_range(next_hop_address, ip_range_start, ip_range_end):
+            # add host route so dest_ip4 will not be resolved
+            rip = VppIpRoute(
+                cls,
+                dest_ip4,
+                32,
+                [VppRoutePath(next_hop_address, INVALID_INDEX)],
+                register=False,
+            )
+            rip.add_vpp_config()
+
+            r = VppVxlanTunnel(
+                cls,
+                src=cls.pg0.local_ip4,
+                src_port=port,
+                dst_port=port,
+                dst=dest_ip4,
+                vni=vni,
+            )
+            r.add_vpp_config()

             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
 
     @classmethod
             cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni)
 
     @classmethod

-    def add_del_shared_mcast_dst_load(cls, is_add):
+    def add_del_shared_mcast_dst_load(cls, port, is_add):

         """
         add or del tunnels sharing the same mcast dst
         to test vxlan ref_count mechanism
         """
         """
         add or del tunnels sharing the same mcast dst
         to test vxlan ref_count mechanism
         """

-        n_shared_dst_tunnels = 2000
+        n_shared_dst_tunnels = 20

         vni_start = 10000
         vni_end = vni_start + n_shared_dst_tunnels
         for vni in range(vni_start, vni_end):
         vni_start = 10000
         vni_end = vni_start + n_shared_dst_tunnels
         for vni in range(vni_start, vni_end):

-            cls.vapi.vxlan_add_del_tunnel(
-                src_addr=cls.pg0.local_ip4n,
-                dst_addr=cls.mcast_ip4n,
+            r = VppVxlanTunnel(
+                cls,
+                src=cls.pg0.local_ip4,
+                src_port=port,
+                dst_port=port,
+                dst=cls.mcast_ip4,

                 mcast_sw_if_index=1,
                 vni=vni,
                 mcast_sw_if_index=1,
                 vni=vni,

-                is_add=is_add)
+            )
+            if is_add:
+                r.add_vpp_config()
+                if r.sw_if_index == 0xFFFFFFFF:
+                    raise ValueError("bad sw_if_index: ~0")
+            else:
+                r.remove_vpp_config()

 
     @classmethod
 
     @classmethod

-    def add_shared_mcast_dst_load(cls):
-        cls.add_del_shared_mcast_dst_load(is_add=1)
+    def add_shared_mcast_dst_load(cls, port):
+        cls.add_del_shared_mcast_dst_load(port=port, is_add=1)

 
     @classmethod
 
     @classmethod

-    def del_shared_mcast_dst_load(cls):
-        cls.add_del_shared_mcast_dst_load(is_add=0)
+    def del_shared_mcast_dst_load(cls, port):
+        cls.add_del_shared_mcast_dst_load(port=port, is_add=0)

 
     @classmethod
 
     @classmethod

-    def add_del_mcast_tunnels_load(cls, is_add):
+    def add_del_mcast_tunnels_load(cls, port, is_add):

         """
         add or del tunnels to test vxlan stability
         """
         n_distinct_dst_tunnels = 200
         ip_range_start = 10
         ip_range_end = ip_range_start + n_distinct_dst_tunnels
         """
         add or del tunnels to test vxlan stability
         """
         n_distinct_dst_tunnels = 200
         ip_range_start = 10
         ip_range_end = ip_range_start + n_distinct_dst_tunnels

-        for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
-                                    ip_range_end):
-            vni = bytearray(dest_ip4n)[3]
-            cls.vapi.vxlan_add_del_tunnel(
-                src_addr=cls.pg0.local_ip4n,
-                dst_addr=dest_ip4n,
+        for dest_ip4 in ip4_range(cls.mcast_ip4, ip_range_start, ip_range_end):
+            vni = bytearray(socket.inet_pton(socket.AF_INET, dest_ip4))[3]
+            r = VppVxlanTunnel(
+                cls,
+                src=cls.pg0.local_ip4,
+                src_port=port,
+                dst_port=port,
+                dst=dest_ip4,

                 mcast_sw_if_index=1,
                 vni=vni,
                 mcast_sw_if_index=1,
                 vni=vni,

-                is_add=is_add)
+            )
+            if is_add:
+                r.add_vpp_config()
+            else:
+                r.remove_vpp_config()

 
     @classmethod
 
     @classmethod

-    def add_mcast_tunnels_load(cls):
-        cls.add_del_mcast_tunnels_load(is_add=1)
+    def add_mcast_tunnels_load(cls, port):
+        cls.add_del_mcast_tunnels_load(port=port, is_add=1)

 
     @classmethod
 
     @classmethod

-    def del_mcast_tunnels_load(cls):
-        cls.add_del_mcast_tunnels_load(is_add=0)
+    def del_mcast_tunnels_load(cls, port):
+        cls.add_del_mcast_tunnels_load(port=port, is_add=0)

 
     # Class method to start the VXLAN test case.
     #  Overrides setUpClass method in VppTestCase class.
 
     # Class method to start the VXLAN test case.
     #  Overrides setUpClass method in VppTestCase class.


@@ -152,7 +196,6 @@ class TestVxlan(BridgeDomain, VppTestCase):
         super(TestVxlan, cls).setUpClass()
 
         try:
         super(TestVxlan, cls).setUpClass()
 
         try:

-            cls.dport = 4789

             cls.flags = 0x8
 
             # Create 2 pg interfaces.
             cls.flags = 0x8
 
             # Create 2 pg interfaces.


@@ -167,66 +210,312 @@ class TestVxlan(BridgeDomain, VppTestCase):
             cls.pg0.resolve_arp()
 
             # Our Multicast address
             cls.pg0.resolve_arp()
 
             # Our Multicast address

-            cls.mcast_ip4 = '239.1.1.1'
-            cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
-            iplong = atol(cls.mcast_ip4)
-            cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
-                (iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
-
-            # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
-            #  into BD.
-            cls.single_tunnel_bd = 1
-            r = cls.vapi.vxlan_add_del_tunnel(
-                src_addr=cls.pg0.local_ip4n,
-                dst_addr=cls.pg0.remote_ip4n,
-                vni=cls.single_tunnel_bd)
-            cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
-                                                bd_id=cls.single_tunnel_bd)
-            cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index,
-                                                bd_id=cls.single_tunnel_bd)
-
-            # Setup vni 2 to test multicast flooding
-            cls.n_ucast_tunnels = 10
-            cls.mcast_flood_bd = 2
-            cls.create_vxlan_flood_test_bd(cls.mcast_flood_bd,
-                                           cls.n_ucast_tunnels)
-            r = cls.vapi.vxlan_add_del_tunnel(
-                src_addr=cls.pg0.local_ip4n,
-                dst_addr=cls.mcast_ip4n,
-                mcast_sw_if_index=1,
-                vni=cls.mcast_flood_bd)
-            cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
-                                                bd_id=cls.mcast_flood_bd)
-            cls.vapi.sw_interface_set_l2_bridge(cls.pg2.sw_if_index,
-                                                bd_id=cls.mcast_flood_bd)
-
-            # Add and delete mcast tunnels to check stability
-            cls.add_shared_mcast_dst_load()
-            cls.add_mcast_tunnels_load()
-            cls.del_shared_mcast_dst_load()
-            cls.del_mcast_tunnels_load()
-
-            # Setup vni 3 to test unicast flooding
-            cls.ucast_flood_bd = 3
-            cls.create_vxlan_flood_test_bd(cls.ucast_flood_bd,
-                                           cls.n_ucast_tunnels)
-            cls.vapi.sw_interface_set_l2_bridge(cls.pg3.sw_if_index,
-                                                bd_id=cls.ucast_flood_bd)
+            cls.mcast_ip4 = "239.1.1.1"
+            cls.mcast_mac = util.mcast_ip_to_mac(cls.mcast_ip4)

         except Exception:
         except Exception:

-            super(TestVxlan, cls).tearDownClass()
+            cls.tearDownClass()

             raise
 
             raise
 

+    @classmethod
+    def tearDownClass(cls):
+        super(TestVxlan, cls).tearDownClass()
+
+    def setUp(self):
+        super(TestVxlan, self).setUp()
+
+    def createVxLANInterfaces(self, port=4789):
+        # Create VXLAN VTEP on VPP pg0, and put vxlan_tunnel0 and pg1
+        #  into BD.
+        self.dport = port
+
+        self.single_tunnel_vni = 0x12345
+        self.single_tunnel_bd = 1
+        r = VppVxlanTunnel(
+            self,
+            src=self.pg0.local_ip4,
+            dst=self.pg0.remote_ip4,
+            src_port=self.dport,
+            dst_port=self.dport,
+            vni=self.single_tunnel_vni,
+        )
+        r.add_vpp_config()
+        self.vapi.sw_interface_set_l2_bridge(
+            rx_sw_if_index=r.sw_if_index, bd_id=self.single_tunnel_bd
+        )
+        self.vapi.sw_interface_set_l2_bridge(
+            rx_sw_if_index=self.pg1.sw_if_index, bd_id=self.single_tunnel_bd
+        )
+
+        # Setup vni 2 to test multicast flooding
+        self.n_ucast_tunnels = 10
+        self.mcast_flood_bd = 2
+        self.create_vxlan_flood_test_bd(
+            self.mcast_flood_bd, self.n_ucast_tunnels, self.dport
+        )
+        r = VppVxlanTunnel(
+            self,
+            src=self.pg0.local_ip4,
+            dst=self.mcast_ip4,
+            src_port=self.dport,
+            dst_port=self.dport,
+            mcast_sw_if_index=1,
+            vni=self.mcast_flood_bd,
+        )
+        r.add_vpp_config()
+        self.vapi.sw_interface_set_l2_bridge(
+            rx_sw_if_index=r.sw_if_index, bd_id=self.mcast_flood_bd
+        )
+        self.vapi.sw_interface_set_l2_bridge(
+            rx_sw_if_index=self.pg2.sw_if_index, bd_id=self.mcast_flood_bd
+        )
+
+        # Add and delete mcast tunnels to check stability
+        self.add_shared_mcast_dst_load(self.dport)
+        self.add_mcast_tunnels_load(self.dport)
+        self.del_shared_mcast_dst_load(self.dport)
+        self.del_mcast_tunnels_load(self.dport)
+
+        # Setup vni 3 to test unicast flooding
+        self.ucast_flood_bd = 3
+        self.create_vxlan_flood_test_bd(
+            self.ucast_flood_bd, self.n_ucast_tunnels, self.dport
+        )
+        self.vapi.sw_interface_set_l2_bridge(
+            rx_sw_if_index=self.pg3.sw_if_index, bd_id=self.ucast_flood_bd
+        )
+
+        # Set scapy listen custom port for VxLAN
+        bind_layers(UDP, VXLAN, dport=self.dport)
+
+    def encap_big_packet(self):
+        self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0])
+
+        frame = (
+            Ether(src="00:00:00:00:00:02", dst="00:00:00:00:00:01")
+            / IP(src="4.3.2.1", dst="1.2.3.4")
+            / UDP(sport=20000, dport=10000)
+            / Raw(b"\xa5" * 1450)
+        )
+
+        self.pg1.add_stream([frame])
+
+        self.pg0.enable_capture()
+
+        self.pg_start()
+
+        # Pick first received frame and check if it's correctly encapsulated.
+        out = self.pg0.get_capture(2)
+        ether = out[0]
+        pkt = reassemble4(out)
+        pkt = ether / pkt
+        self.check_encapsulation(pkt, self.single_tunnel_vni)
+
+        payload = self.decapsulate(pkt)
+        # TODO: Scapy bug?
+        # self.assert_eq_pkts(payload, frame)
+
+    """
+    Tests with default port (4789)
+    """
+
+    def test_decap(self):
+        """Decapsulation test
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces()
+        super(TestVxlan, self).test_decap()
+
+    def test_encap(self):
+        """Encapsulation test
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces()
+        super(TestVxlan, self).test_encap()
+
+    def test_encap_big_packet(self):
+        """Encapsulation test send big frame from pg1
+        Verify receipt of encapsulated frames on pg0
+        """
+        self.createVxLANInterfaces()
+        self.encap_big_packet()
+
+    def test_ucast_flood(self):
+        """Unicast flood test
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces()
+        super(TestVxlan, self).test_ucast_flood()
+
+    def test_mcast_flood(self):
+        """Multicast flood test
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces()
+        super(TestVxlan, self).test_mcast_flood()
+
+    def test_mcast_rcv(self):
+        """Multicast receive test
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces()
+        super(TestVxlan, self).test_mcast_rcv()
+
+    """
+    Tests with custom port
+    """
+
+    def test_decap_custom_port(self):
+        """Decapsulation test custom port
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces(1111)
+        super(TestVxlan, self).test_decap()
+
+    def test_encap_custom_port(self):
+        """Encapsulation test custom port
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces(1111)
+        super(TestVxlan, self).test_encap()
+
+    def test_ucast_flood_custom_port(self):
+        """Unicast flood test custom port
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces(1111)
+        super(TestVxlan, self).test_ucast_flood()
+
+    def test_mcast_flood_custom_port(self):
+        """Multicast flood test custom port
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces(1111)
+        super(TestVxlan, self).test_mcast_flood()
+
+    def test_mcast_rcv_custom_port(self):
+        """Multicast receive test custom port
+        from BridgeDoman
+        """
+        self.createVxLANInterfaces(1111)
+        super(TestVxlan, self).test_mcast_rcv()
+

     # Method to define VPP actions before tear down of the test case.
     #  Overrides tearDown method in VppTestCase class.
     #  @param self The object pointer.
     # Method to define VPP actions before tear down of the test case.
     #  Overrides tearDown method in VppTestCase class.
     #  @param self The object pointer.

+

     def tearDown(self):
         super(TestVxlan, self).tearDown()
     def tearDown(self):
         super(TestVxlan, self).tearDown()

-        if not self.vpp_dead:
-            self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
-            self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
-            self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
-            self.logger.info(self.vapi.cli("show vxlan tunnel"))
+
+    def show_commands_at_teardown(self):
+        self.logger.info(self.vapi.cli("show bridge-domain 1 detail"))
+        self.logger.info(self.vapi.cli("show bridge-domain 2 detail"))
+        self.logger.info(self.vapi.cli("show bridge-domain 3 detail"))
+        self.logger.info(self.vapi.cli("show vxlan tunnel"))
+
+
+class TestVxlan2(VppTestCase):
+    """VXLAN Test Case"""
+
+    def setUp(self):
+        super(TestVxlan2, self).setUp()
+
+        # Create 2 pg interfaces.
+        self.create_pg_interfaces(range(4))
+        for pg in self.pg_interfaces:
+            pg.admin_up()
+
+        # Configure IPv4 addresses on VPP pg0.
+        self.pg0.config_ip4()
+        self.pg0.resolve_arp()
+
+    def tearDown(self):
+        super(TestVxlan2, self).tearDown()
+
+    def test_xconnect(self):
+        """VXLAN source address not local"""
+
+        #
+        # test the broken configuration of a VXLAN tunnel whose
+        # source address is not local ot the box. packets sent
+        # through the tunnel should be dropped
+        #
+        t = VppVxlanTunnel(self, src="10.0.0.5", dst=self.pg0.local_ip4, vni=1000)
+        t.add_vpp_config()
+        t.admin_up()
+
+        self.vapi.sw_interface_set_l2_xconnect(
+            t.sw_if_index, self.pg1.sw_if_index, enable=1
+        )
+        self.vapi.sw_interface_set_l2_xconnect(
+            self.pg1.sw_if_index, t.sw_if_index, enable=1
+        )
+
+        p = (
+            Ether(src="00:11:22:33:44:55", dst="00:00:00:11:22:33")
+            / IP(src="4.3.2.1", dst="1.2.3.4")
+            / UDP(sport=20000, dport=10000)
+            / Raw(b"\xa5" * 1450)
+        )
+
+        rx = self.send_and_assert_no_replies(self.pg1, [p])
+
+
+class TestVxlanL2Mode(VppTestCase):
+    """VXLAN Test Case"""
+
+    def setUp(self):
+        super(TestVxlanL2Mode, self).setUp()
+
+        # Create 2 pg interfaces.
+        self.create_pg_interfaces(range(2))
+        for pg in self.pg_interfaces:
+            pg.admin_up()
+
+        # Configure IPv4 addresses on VPP pg0.
+        self.pg0.config_ip4()
+        self.pg0.resolve_arp()
+
+        # Configure IPv4 addresses on VPP pg1.
+        self.pg1.config_ip4()
+
+    def tearDown(self):
+        super(TestVxlanL2Mode, self).tearDown()
+
+    def test_l2_mode(self):
+        """VXLAN L2 mode"""
+        t = VppVxlanTunnel(
+            self, src=self.pg0.local_ip4, dst=self.pg0.remote_ip4, vni=1000, is_l3=False
+        )
+        t.add_vpp_config()
+        t.config_ip4()
+        t.admin_up()
+
+        dstIP = t.local_ip4[:-1] + "2"
+
+        # Create a packet to send
+        p = (
+            Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
+            / IP(src=self.pg1.local_ip4, dst=dstIP)
+            / UDP(sport=555, dport=556)
+            / Raw(b"\x00" * 80)
+        )
+
+        # Expect ARP request
+        rx = self.send_and_expect(self.pg1, [p], self.pg0)
+        for p in rx:
+            self.assertEqual(p[Ether].dst, self.pg0.remote_mac)
+            self.assertEqual(p[Ether].src, self.pg0.local_mac)
+            self.assertEqual(p[ARP].op, 1)
+            self.assertEqual(p[ARP].pdst, dstIP)
+
+        # Resolve ARP
+        VppNeighbor(self, t.sw_if_index, self.pg1.remote_mac, dstIP).add_vpp_config()
+
+        # Send packets
+        NUM_PKTS = 128
+        rx = self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg0)
+        self.assertEqual(NUM_PKTS, len(rx))

 
 
 
 

-if __name__ == '__main__':
+if __name__ == "__main__":

     unittest.main(testRunner=VppTestRunner)
     unittest.main(testRunner=VppTestRunner)