tests: move bier tests to src/vnet/bier/test

- Refactor make test code to be co-located with
  the vpp feature source code

Type: test

Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Change-Id: I17003925be06d1051f18f1c24ff081790a610c23

1 files changed, 862 insertions, 0 deletions

diff --git a/src/vnet/bier/test/test_bier.py b/src/vnet/bier/test/test_bier.py
new file mode 100644
index 00000000000..2f649bbde53
--- /dev/null
+++ b/src/vnet/bier/test/test_bier.py
@@ -0,0 +1,862 @@
+#!/usr/bin/env python3
+
+import unittest
+
+from framework import VppTestCase, VppTestRunner, running_extended_tests
+from vpp_ip import DpoProto
+from vpp_ip_route import VppIpRoute, VppRoutePath, \
+    VppMplsTable, VppIpMRoute, VppMRoutePath, VppIpTable, \
+    MPLS_LABEL_INVALID, \
+    VppMplsLabel, FibPathProto, FibPathType
+from vpp_bier import BIER_HDR_PAYLOAD, VppBierImp, VppBierDispEntry, \
+    VppBierDispTable, VppBierTable, VppBierTableID, VppBierRoute
+from vpp_udp_encap import VppUdpEncap
+from vpp_papi import VppEnum
+
+import scapy.compat
+from scapy.packet import Raw
+from scapy.layers.l2 import Ether
+from scapy.layers.inet import IP, UDP
+from scapy.layers.inet6 import IPv6
+from scapy.contrib.mpls import MPLS
+from scapy.contrib.bier import BIER, BIERLength, BIFT
+
+NUM_PKTS = 67
+
+
+class TestBFIB(VppTestCase):
+    """ BIER FIB Test Case """
+
+    def test_bfib(self):
+        """ BFIB Unit Tests """
+        error = self.vapi.cli("test bier")
+
+        if error:
+            self.logger.critical(error)
+        self.assertNotIn("Failed", error)
+
+
+class TestBier(VppTestCase):
+    """ BIER Test Case """
+
+    def setUp(self):
+        super(TestBier, self).setUp()
+
+        # create 2 pg interfaces
+        self.create_pg_interfaces(range(3))
+
+        # create the default MPLS table
+        self.tables = []
+        tbl = VppMplsTable(self, 0)
+        tbl.add_vpp_config()
+        self.tables.append(tbl)
+
+        tbl = VppIpTable(self, 10)
+        tbl.add_vpp_config()
+        self.tables.append(tbl)
+
+        # setup both interfaces
+        for i in self.pg_interfaces:
+            if i == self.pg2:
+                i.set_table_ip4(10)
+            i.admin_up()
+            i.config_ip4()
+            i.resolve_arp()
+            i.enable_mpls()
+
+    def tearDown(self):
+        for i in self.pg_interfaces:
+            i.disable_mpls()
+            i.unconfig_ip4()
+            i.set_table_ip4(0)
+            i.admin_down()
+        super(TestBier, self).tearDown()
+
+    def bier_midpoint(self, hdr_len_id, n_bytes, max_bp):
+        """BIER midpoint"""
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(0, 0, hdr_len_id)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        #
+        # A packet with no bits set gets dropped
+        #
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             MPLS(label=77, ttl=255) /
+             BIER(length=hdr_len_id) /
+             IPv6(src=self.pg0.remote_ip6, dst=self.pg0.remote_ip6) /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+        pkts = [p]
+
+        self.send_and_assert_no_replies(self.pg0, pkts,
+                                        "Empty Bit-String")
+
+        #
+        # Add a BIER route for each bit-position in the table via a different
+        # next-hop. Testing whether the BIER walk and replicate forwarding
+        # function works for all bit posisitons.
+        #
+        nh_routes = []
+        bier_routes = []
+        for i in range(1, max_bp+1):
+            nh = "10.0.%d.%d" % (i / 255, i % 255)
+            nh_routes.append(
+                VppIpRoute(self, nh, 32,
+                           [VppRoutePath(self.pg1.remote_ip4,
+                                         self.pg1.sw_if_index,
+                                         labels=[VppMplsLabel(2000+i)])]))
+            nh_routes[-1].add_vpp_config()
+
+            bier_routes.append(
+                VppBierRoute(self, bti, i,
+                             [VppRoutePath(nh, 0xffffffff,
+                                           labels=[VppMplsLabel(100+i)])]))
+            bier_routes[-1].add_vpp_config()
+
+        #
+        # A packet with all bits set gets replicated once for each bit
+        #
+        pkt_sizes = [64, 1400]
+
+        for pkt_size in pkt_sizes:
+            p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+                 MPLS(label=77, ttl=255) /
+                 BIER(length=hdr_len_id,
+                      BitString=scapy.compat.chb(255)*n_bytes) /
+                 IPv6(src=self.pg0.remote_ip6, dst=self.pg0.remote_ip6) /
+                 UDP(sport=1234, dport=1234) /
+                 Raw(scapy.compat.chb(5) * pkt_size))
+            pkts = p
+
+            self.pg0.add_stream(pkts)
+            self.pg_enable_capture(self.pg_interfaces)
+            self.pg_start()
+
+            rx = self.pg1.get_capture(max_bp)
+
+            for rxp in rx:
+                #
+                # The packets are not required to be sent in bit-position order
+                # when we setup the routes above we used the bit-position to
+                # construct the out-label. so use that here to determine the BP
+                #
+                olabel = rxp[MPLS]
+                bp = olabel.label - 2000
+
+                blabel = olabel[MPLS].payload
+                self.assertEqual(blabel.label, 100+bp)
+                self.assertEqual(blabel.ttl, 254)
+
+                bier_hdr = blabel[MPLS].payload
+
+                self.assertEqual(bier_hdr.id, 5)
+                self.assertEqual(bier_hdr.version, 0)
+                self.assertEqual(bier_hdr.length, hdr_len_id)
+                self.assertEqual(bier_hdr.entropy, 0)
+                self.assertEqual(bier_hdr.OAM, 0)
+                self.assertEqual(bier_hdr.RSV, 0)
+                self.assertEqual(bier_hdr.DSCP, 0)
+                self.assertEqual(bier_hdr.Proto, 5)
+
+                # The bit-string should consist only of the BP given by i.
+                byte_array = [b'\0'] * (n_bytes)
+                byte_val = scapy.compat.chb(1 << (bp - 1) % 8)
+                byte_pos = n_bytes - (((bp - 1) // 8) + 1)
+                byte_array[byte_pos] = byte_val
+                bitstring = b''.join(byte_array)
+
+                self.assertEqual(len(bitstring), len(bier_hdr.BitString))
+                self.assertEqual(bitstring, bier_hdr.BitString)
+
+        #
+        # cleanup. not strictly necessary, but it's much quicker this way
+        # because the bier_fib_dump and ip_fib_dump will be empty when the
+        # auto-cleanup kicks in
+        #
+        for br in bier_routes:
+            br.remove_vpp_config()
+        for nhr in nh_routes:
+            nhr.remove_vpp_config()
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_midpoint_1024(self):
+        """BIER midpoint BSL:1024"""
+        self.bier_midpoint(BIERLength.BIER_LEN_1024, 128, 1024)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_midpoint_512(self):
+        """BIER midpoint BSL:512"""
+        self.bier_midpoint(BIERLength.BIER_LEN_512, 64, 512)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_midpoint_256(self):
+        """BIER midpoint BSL:256"""
+        self.bier_midpoint(BIERLength.BIER_LEN_256, 32, 256)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_midpoint_128(self):
+        """BIER midpoint BSL:128"""
+        self.bier_midpoint(BIERLength.BIER_LEN_128, 16, 128)
+
+    def test_bier_midpoint_64(self):
+        """BIER midpoint BSL:64"""
+        self.bier_midpoint(BIERLength.BIER_LEN_64, 8, 64)
+
+    def test_bier_load_balance(self):
+        """BIER load-balance"""
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(0, 0, BIERLength.BIER_LEN_64)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        #
+        # packets with varying entropy
+        #
+        pkts = []
+        for ii in range(257):
+            pkts.append((Ether(dst=self.pg0.local_mac,
+                               src=self.pg0.remote_mac) /
+                         MPLS(label=77, ttl=255) /
+                         BIER(length=BIERLength.BIER_LEN_64,
+                              entropy=ii,
+                              BitString=scapy.compat.chb(255)*16) /
+                         IPv6(src=self.pg0.remote_ip6,
+                              dst=self.pg0.remote_ip6) /
+                         UDP(sport=1234, dport=1234) /
+                         Raw()))
+
+        #
+        # 4 next hops
+        #
+        nhs = [{'ip': "10.0.0.1", 'label': 201},
+               {'ip': "10.0.0.2", 'label': 202},
+               {'ip': "10.0.0.3", 'label': 203},
+               {'ip': "10.0.0.4", 'label': 204}]
+
+        for nh in nhs:
+            ipr = VppIpRoute(
+                self, nh['ip'], 32,
+                [VppRoutePath(self.pg1.remote_ip4,
+                              self.pg1.sw_if_index,
+                              labels=[VppMplsLabel(nh['label'])])])
+            ipr.add_vpp_config()
+
+        bier_route = VppBierRoute(
+            self, bti, 1,
+            [VppRoutePath(nhs[0]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)]),
+             VppRoutePath(nhs[1]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)])])
+        bier_route.add_vpp_config()
+
+        rx = self.send_and_expect(self.pg0, pkts, self.pg1)
+
+        #
+        # we should have recieved a packet from each neighbor
+        #
+        for nh in nhs[:2]:
+            self.assertTrue(sum(p[MPLS].label == nh['label'] for p in rx))
+
+        #
+        # add the other paths
+        #
+        bier_route.update_paths(
+            [VppRoutePath(nhs[0]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)]),
+             VppRoutePath(nhs[1]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)]),
+             VppRoutePath(nhs[2]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)]),
+             VppRoutePath(nhs[3]['ip'], 0xffffffff,
+                          labels=[VppMplsLabel(101)])])
+
+        rx = self.send_and_expect(self.pg0, pkts, self.pg1)
+
+        for nh in nhs:
+            self.assertTrue(sum(p[MPLS].label == nh['label'] for p in rx))
+
+        #
+        # remove first two paths
+        #
+        bier_route.remove_path(VppRoutePath(nhs[0]['ip'], 0xffffffff,
+                                            labels=[VppMplsLabel(101)]))
+        bier_route.remove_path(VppRoutePath(nhs[1]['ip'], 0xffffffff,
+                                            labels=[VppMplsLabel(101)]))
+
+        rx = self.send_and_expect(self.pg0, pkts, self.pg1)
+        for nh in nhs[2:]:
+            self.assertTrue(sum(p[MPLS].label == nh['label'] for p in rx))
+
+        #
+        # remove the last of the paths, deleteing the entry
+        #
+        bier_route.remove_all_paths()
+
+        self.send_and_assert_no_replies(self.pg0, pkts)
+
+    def test_bier_head(self):
+        """BIER head"""
+
+        MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
+        MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(0, 0, BIERLength.BIER_LEN_256)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        #
+        # 2 bit positions via two next hops
+        #
+        nh1 = "10.0.0.1"
+        nh2 = "10.0.0.2"
+        ip_route_1 = VppIpRoute(self, nh1, 32,
+                                [VppRoutePath(self.pg1.remote_ip4,
+                                              self.pg1.sw_if_index,
+                                              labels=[VppMplsLabel(2001)])])
+        ip_route_2 = VppIpRoute(self, nh2, 32,
+                                [VppRoutePath(self.pg1.remote_ip4,
+                                              self.pg1.sw_if_index,
+                                              labels=[VppMplsLabel(2002)])])
+        ip_route_1.add_vpp_config()
+        ip_route_2.add_vpp_config()
+
+        bier_route_1 = VppBierRoute(self, bti, 1,
+                                    [VppRoutePath(nh1, 0xffffffff,
+                                                  labels=[VppMplsLabel(101)])])
+        bier_route_2 = VppBierRoute(self, bti, 2,
+                                    [VppRoutePath(nh2, 0xffffffff,
+                                                  labels=[VppMplsLabel(102)])])
+        bier_route_1.add_vpp_config()
+        bier_route_2.add_vpp_config()
+
+        #
+        # An imposition object with both bit-positions set
+        #
+        bi = VppBierImp(self, bti, 333, scapy.compat.chb(0x3) * 32)
+        bi.add_vpp_config()
+
+        #
+        # Add a multicast route that will forward into the BIER doamin
+        #
+        route_ing_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg0.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
+                   VppMRoutePath(0xffffffff,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                                 proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                 type=FibPathType.FIB_PATH_TYPE_BIER_IMP,
+                                 bier_imp=bi.bi_index)])
+        route_ing_232_1_1_1.add_vpp_config()
+
+        #
+        # inject an IP packet. We expect it to be BIER encapped and
+        # replicated.
+        #
+        p = (Ether(dst=self.pg0.local_mac,
+                   src=self.pg0.remote_mac) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234))
+
+        self.pg0.add_stream([p])
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg1.get_capture(2)
+
+        #
+        # Encap Stack is; eth, MPLS, MPLS, BIER
+        #
+        igp_mpls = rx[0][MPLS]
+        self.assertEqual(igp_mpls.label, 2001)
+        self.assertEqual(igp_mpls.ttl, 64)
+        self.assertEqual(igp_mpls.s, 0)
+        bier_mpls = igp_mpls[MPLS].payload
+        self.assertEqual(bier_mpls.label, 101)
+        self.assertEqual(bier_mpls.ttl, 64)
+        self.assertEqual(bier_mpls.s, 1)
+        self.assertEqual(rx[0][BIER].length, 2)
+
+        igp_mpls = rx[1][MPLS]
+        self.assertEqual(igp_mpls.label, 2002)
+        self.assertEqual(igp_mpls.ttl, 64)
+        self.assertEqual(igp_mpls.s, 0)
+        bier_mpls = igp_mpls[MPLS].payload
+        self.assertEqual(bier_mpls.label, 102)
+        self.assertEqual(bier_mpls.ttl, 64)
+        self.assertEqual(bier_mpls.s, 1)
+        self.assertEqual(rx[0][BIER].length, 2)
+
+    def test_bier_tail(self):
+        """BIER Tail"""
+
+        MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
+        MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(0, 0, BIERLength.BIER_LEN_256)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        #
+        # disposition table
+        #
+        bdt = VppBierDispTable(self, 8)
+        bdt.add_vpp_config()
+
+        #
+        # BIER route in table that's for-us
+        #
+        bier_route_1 = VppBierRoute(
+            self, bti, 1,
+            [VppRoutePath("0.0.0.0",
+                          0xffffffff,
+                          proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                          nh_table_id=8)])
+        bier_route_1.add_vpp_config()
+
+        #
+        # An entry in the disposition table
+        #
+        bier_de_1 = VppBierDispEntry(self, bdt.id, 99,
+                                     BIER_HDR_PAYLOAD.BIER_HDR_PROTO_IPV4,
+                                     FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                     "0.0.0.0", 0, rpf_id=8192)
+        bier_de_1.add_vpp_config()
+
+        #
+        # A multicast route to forward post BIER disposition
+        #
+        route_eg_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg1.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+        route_eg_232_1_1_1.add_vpp_config()
+        route_eg_232_1_1_1.update_rpf_id(8192)
+
+        #
+        # A packet with all bits set gets spat out to BP:1
+        #
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             MPLS(label=77, ttl=255) /
+             BIER(length=BIERLength.BIER_LEN_256,
+                  BitString=scapy.compat.chb(255)*32,
+                  BFRID=99) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        self.send_and_expect(self.pg0, [p], self.pg1)
+
+        #
+        # A packet that does not match the Disposition entry gets dropped
+        #
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             MPLS(label=77, ttl=255) /
+             BIER(length=BIERLength.BIER_LEN_256,
+                  BitString=scapy.compat.chb(255)*32,
+                  BFRID=77) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+        self.send_and_assert_no_replies(self.pg0, p*2,
+                                        "no matching disposition entry")
+
+        #
+        # Add the default route to the disposition table
+        #
+        bier_de_2 = VppBierDispEntry(self, bdt.id, 0,
+                                     BIER_HDR_PAYLOAD.BIER_HDR_PROTO_IPV4,
+                                     FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                     "0.0.0.0", 0, rpf_id=8192)
+        bier_de_2.add_vpp_config()
+
+        #
+        # now the previous packet is forwarded
+        #
+        self.send_and_expect(self.pg0, [p], self.pg1)
+
+        #
+        # A multicast route to forward post BIER disposition that needs
+        # a check against sending back into the BIER core
+        #
+        bi = VppBierImp(self, bti, 333, scapy.compat.chb(0x3) * 32)
+        bi.add_vpp_config()
+
+        route_eg_232_1_1_2 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.2", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(0xffffffff,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                                 proto=DpoProto.DPO_PROTO_BIER,
+                                 type=FibPathType.FIB_PATH_TYPE_BIER_IMP,
+                                 bier_imp=bi.bi_index),
+                   VppMRoutePath(self.pg1.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+        route_eg_232_1_1_2.add_vpp_config()
+        route_eg_232_1_1_2.update_rpf_id(8192)
+
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             MPLS(label=77, ttl=255) /
+             BIER(length=BIERLength.BIER_LEN_256,
+                  BitString=scapy.compat.chb(255)*32,
+                  BFRID=77) /
+             IP(src="1.1.1.1", dst="232.1.1.2") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+        self.send_and_expect(self.pg0, [p], self.pg1)
+
+    def bier_e2e(self, hdr_len_id, n_bytes, max_bp):
+        """ BIER end-to-end"""
+
+        MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
+        MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(0, 0, hdr_len_id)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        lowest = [b'\0'] * (n_bytes)
+        lowest[-1] = scapy.compat.chb(1)
+        highest = [b'\0'] * (n_bytes)
+        highest[0] = scapy.compat.chb(128)
+
+        #
+        # Impostion Sets bit strings
+        #
+        bi_low = VppBierImp(self, bti, 333, lowest)
+        bi_low.add_vpp_config()
+        bi_high = VppBierImp(self, bti, 334, highest)
+        bi_high.add_vpp_config()
+
+        #
+        # Add a multicast route that will forward into the BIER doamin
+        #
+        route_ing_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg0.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
+                   VppMRoutePath(0xffffffff,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                                 proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                 type=FibPathType.FIB_PATH_TYPE_BIER_IMP,
+                                 bier_imp=bi_low.bi_index)])
+        route_ing_232_1_1_1.add_vpp_config()
+        route_ing_232_1_1_2 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.2", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg0.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
+                   VppMRoutePath(0xffffffff,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                                 proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                 type=FibPathType.FIB_PATH_TYPE_BIER_IMP,
+                                 bier_imp=bi_high.bi_index)])
+        route_ing_232_1_1_2.add_vpp_config()
+
+        #
+        # disposition table 8
+        #
+        bdt = VppBierDispTable(self, 8)
+        bdt.add_vpp_config()
+
+        #
+        # BIER routes in table that are for-us, resolving through
+        # disp table 8.
+        #
+        bier_route_1 = VppBierRoute(
+            self, bti, 1,
+            [VppRoutePath("0.0.0.0",
+                          0xffffffff,
+                          proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                          nh_table_id=8)])
+        bier_route_1.add_vpp_config()
+        bier_route_max = VppBierRoute(
+            self, bti, max_bp,
+            [VppRoutePath("0.0.0.0",
+                          0xffffffff,
+                          proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                          nh_table_id=8)])
+        bier_route_max.add_vpp_config()
+
+        #
+        # An entry in the disposition table for sender 333
+        #  lookup in VRF 10
+        #
+        bier_de_1 = VppBierDispEntry(self, bdt.id, 333,
+                                     BIER_HDR_PAYLOAD.BIER_HDR_PROTO_IPV4,
+                                     FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                     "0.0.0.0", 10, rpf_id=8192)
+        bier_de_1.add_vpp_config()
+        bier_de_1 = VppBierDispEntry(self, bdt.id, 334,
+                                     BIER_HDR_PAYLOAD.BIER_HDR_PROTO_IPV4,
+                                     FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                     "0.0.0.0", 10, rpf_id=8193)
+        bier_de_1.add_vpp_config()
+
+        #
+        # Add a multicast routes that will forward the traffic
+        # post-disposition
+        #
+        route_eg_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            table_id=10,
+            paths=[VppMRoutePath(self.pg1.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+        route_eg_232_1_1_1.add_vpp_config()
+        route_eg_232_1_1_1.update_rpf_id(8192)
+        route_eg_232_1_1_2 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.2", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            table_id=10,
+            paths=[VppMRoutePath(self.pg1.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+        route_eg_232_1_1_2.add_vpp_config()
+        route_eg_232_1_1_2.update_rpf_id(8193)
+
+        #
+        # inject a packet in VRF-0. We expect it to be BIER encapped,
+        # replicated, then hit the disposition and be forwarded
+        # out of VRF 10, i.e. on pg1
+        #
+        p = (Ether(dst=self.pg0.local_mac,
+                   src=self.pg0.remote_mac) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234) /
+             Raw(scapy.compat.chb(5) * 32))
+
+        rx = self.send_and_expect(self.pg0, p*NUM_PKTS, self.pg1)
+
+        self.assertEqual(rx[0][IP].src, "1.1.1.1")
+        self.assertEqual(rx[0][IP].dst, "232.1.1.1")
+
+        p = (Ether(dst=self.pg0.local_mac,
+                   src=self.pg0.remote_mac) /
+             IP(src="1.1.1.1", dst="232.1.1.2") /
+             UDP(sport=1234, dport=1234) /
+             Raw(scapy.compat.chb(5) * 512))
+
+        rx = self.send_and_expect(self.pg0, p*NUM_PKTS, self.pg1)
+        self.assertEqual(rx[0][IP].src, "1.1.1.1")
+        self.assertEqual(rx[0][IP].dst, "232.1.1.2")
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_e2e_1024(self):
+        """ BIER end-to-end BSL:1024"""
+        self.bier_e2e(BIERLength.BIER_LEN_1024, 128, 1024)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_e2e_512(self):
+        """ BIER end-to-end BSL:512"""
+        self.bier_e2e(BIERLength.BIER_LEN_512, 64, 512)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_e2e_256(self):
+        """ BIER end-to-end BSL:256"""
+        self.bier_e2e(BIERLength.BIER_LEN_256, 32, 256)
+
+    @unittest.skipUnless(running_extended_tests, "part of extended tests")
+    def test_bier_e2e_128(self):
+        """ BIER end-to-end BSL:128"""
+        self.bier_e2e(BIERLength.BIER_LEN_128, 16, 128)
+
+    def test_bier_e2e_64(self):
+        """ BIER end-to-end BSL:64"""
+        self.bier_e2e(BIERLength.BIER_LEN_64, 8, 64)
+
+    def test_bier_head_o_udp(self):
+        """BIER head over UDP"""
+
+        MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
+        MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
+
+        #
+        # Add a BIER table for sub-domain 1, set 0, and BSL 256
+        #
+        bti = VppBierTableID(1, 0, BIERLength.BIER_LEN_256)
+        bt = VppBierTable(self, bti, 77)
+        bt.add_vpp_config()
+
+        #
+        # 1 bit positions via 1 next hops
+        #
+        nh1 = "10.0.0.1"
+        ip_route = VppIpRoute(self, nh1, 32,
+                              [VppRoutePath(self.pg1.remote_ip4,
+                                            self.pg1.sw_if_index,
+                                            labels=[VppMplsLabel(2001)])])
+        ip_route.add_vpp_config()
+
+        udp_encap = VppUdpEncap(self,
+                                self.pg0.local_ip4,
+                                nh1,
+                                330, 8138)
+        udp_encap.add_vpp_config()
+
+        bier_route = VppBierRoute(
+            self, bti, 1,
+            [VppRoutePath("0.0.0.0",
+                          0xFFFFFFFF,
+                          type=FibPathType.FIB_PATH_TYPE_UDP_ENCAP,
+                          next_hop_id=udp_encap.id)])
+        bier_route.add_vpp_config()
+
+        #
+        # An 2 imposition objects with all bit-positions set
+        # only use the second, but creating 2 tests with a non-zero
+        # value index in the route add
+        #
+        bi = VppBierImp(self, bti, 333, scapy.compat.chb(0xff) * 32)
+        bi.add_vpp_config()
+        bi2 = VppBierImp(self, bti, 334, scapy.compat.chb(0xff) * 32)
+        bi2.add_vpp_config()
+
+        #
+        # Add a multicast route that will forward into the BIER doamin
+        #
+        route_ing_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg0.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
+                   VppMRoutePath(0xffffffff,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                                 proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                 type=FibPathType.FIB_PATH_TYPE_BIER_IMP,
+                                 bier_imp=bi2.bi_index)])
+        route_ing_232_1_1_1.add_vpp_config()
+
+        #
+        # inject a packet an IP. We expect it to be BIER and UDP encapped,
+        #
+        p = (Ether(dst=self.pg0.local_mac,
+                   src=self.pg0.remote_mac) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234))
+
+        self.pg0.add_stream([p])
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg1.get_capture(1)
+
+        #
+        # Encap Stack is, eth, IP, UDP, BIFT, BIER
+        #
+        self.assertEqual(rx[0][IP].src, self.pg0.local_ip4)
+        self.assertEqual(rx[0][IP].dst, nh1)
+        self.assertEqual(rx[0][UDP].sport, 330)
+        self.assertEqual(rx[0][UDP].dport, 8138)
+        self.assertEqual(rx[0][BIFT].bsl, BIERLength.BIER_LEN_256)
+        self.assertEqual(rx[0][BIFT].sd, 1)
+        self.assertEqual(rx[0][BIFT].set, 0)
+        self.assertEqual(rx[0][BIFT].ttl, 64)
+        self.assertEqual(rx[0][BIER].length, 2)
+
+    def test_bier_tail_o_udp(self):
+        """BIER Tail over UDP"""
+
+        MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
+        MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
+
+        #
+        # Add a BIER table for sub-domain 0, set 0, and BSL 256
+        #
+        bti = VppBierTableID(1, 0, BIERLength.BIER_LEN_256)
+        bt = VppBierTable(self, bti, MPLS_LABEL_INVALID)
+        bt.add_vpp_config()
+
+        #
+        # disposition table
+        #
+        bdt = VppBierDispTable(self, 8)
+        bdt.add_vpp_config()
+
+        #
+        # BIER route in table that's for-us
+        #
+        bier_route_1 = VppBierRoute(
+            self, bti, 1,
+            [VppRoutePath("0.0.0.0",
+                          0xffffffff,
+                          proto=FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                          nh_table_id=8)])
+        bier_route_1.add_vpp_config()
+
+        #
+        # An entry in the disposition table
+        #
+        bier_de_1 = VppBierDispEntry(self, bdt.id, 99,
+                                     BIER_HDR_PAYLOAD.BIER_HDR_PROTO_IPV4,
+                                     FibPathProto.FIB_PATH_NH_PROTO_BIER,
+                                     "0.0.0.0", 0, rpf_id=8192)
+        bier_de_1.add_vpp_config()
+
+        #
+        # A multicast route to forward post BIER disposition
+        #
+        route_eg_232_1_1_1 = VppIpMRoute(
+            self,
+            "0.0.0.0",
+            "232.1.1.1", 32,
+            MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
+            paths=[VppMRoutePath(self.pg1.sw_if_index,
+                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+        route_eg_232_1_1_1.add_vpp_config()
+        route_eg_232_1_1_1.update_rpf_id(8192)
+
+        #
+        # A packet with all bits set gets spat out to BP:1
+        #
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
+             UDP(sport=333, dport=8138) /
+             BIFT(sd=1, set=0, bsl=2, ttl=255) /
+             BIER(length=BIERLength.BIER_LEN_256,
+                  BitString=scapy.compat.chb(255)*32,
+                  BFRID=99) /
+             IP(src="1.1.1.1", dst="232.1.1.1") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        rx = self.send_and_expect(self.pg0, [p], self.pg1)
+
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)