tests: replace pycodestyle with black
[vpp.git] / test / test_mpls.py
index a568f84..6e01a03 100644 (file)
@@ -6,11 +6,24 @@ import socket
 from framework import tag_fixme_vpp_workers
 from framework import VppTestCase, VppTestRunner
 from vpp_ip import DpoProto, INVALID_INDEX
-from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsRoute, \
-    VppMplsIpBind, VppIpMRoute, VppMRoutePath, \
-    VppIpTable, VppMplsTable, \
-    VppMplsLabel, MplsLspMode, find_mpls_route, \
-    FibPathProto, FibPathType, FibPathFlags, VppMplsLabel, MplsLspMode
+from vpp_ip_route import (
+    VppIpRoute,
+    VppRoutePath,
+    VppMplsRoute,
+    VppMplsIpBind,
+    VppIpMRoute,
+    VppMRoutePath,
+    VppIpTable,
+    VppMplsTable,
+    VppMplsLabel,
+    MplsLspMode,
+    find_mpls_route,
+    FibPathProto,
+    FibPathType,
+    FibPathFlags,
+    VppMplsLabel,
+    MplsLspMode,
+)
 from vpp_mpls_tunnel_interface import VppMPLSTunnelInterface
 from vpp_papi import VppEnum
 
@@ -18,8 +31,12 @@ import scapy.compat
 from scapy.packet import Raw
 from scapy.layers.l2 import Ether, ARP
 from scapy.layers.inet import IP, UDP, ICMP, icmptypes, icmpcodes
-from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded, ICMPv6EchoRequest, \
-    ICMPv6PacketTooBig
+from scapy.layers.inet6 import (
+    IPv6,
+    ICMPv6TimeExceeded,
+    ICMPv6EchoRequest,
+    ICMPv6PacketTooBig,
+)
 from scapy.contrib.mpls import MPLS
 
 NUM_PKTS = 67
@@ -63,7 +80,7 @@ def verify_mpls_stack(tst, rx, mpls_labels):
 
 @tag_fixme_vpp_workers
 class TestMPLS(VppTestCase):
-    """ MPLS Test Case """
+    """MPLS Test Case"""
 
     @classmethod
     def setUpClass(cls):
@@ -120,15 +137,16 @@ class TestMPLS(VppTestCase):
 
     # the default of 64 matches the IP packet TTL default
     def create_stream_labelled_ip4(
-            self,
-            src_if,
-            mpls_labels,
-            ping=0,
-            ip_itf=None,
-            dst_ip=None,
-            chksum=None,
-            ip_ttl=64,
-            n=257):
+        self,
+        src_if,
+        mpls_labels,
+        ping=0,
+        ip_itf=None,
+        dst_ip=None,
+        chksum=None,
+        ip_ttl=64,
+        n=257,
+    ):
         self.reset_packet_infos()
         pkts = []
         for i in range(0, n):
@@ -137,25 +155,32 @@ class TestMPLS(VppTestCase):
             p = Ether(dst=src_if.local_mac, src=src_if.remote_mac)
 
             for ii in range(len(mpls_labels)):
-                p = p / MPLS(label=mpls_labels[ii].value,
-                             ttl=mpls_labels[ii].ttl,
-                             cos=mpls_labels[ii].exp)
+                p = p / MPLS(
+                    label=mpls_labels[ii].value,
+                    ttl=mpls_labels[ii].ttl,
+                    cos=mpls_labels[ii].exp,
+                )
             if not ping:
                 if not dst_ip:
-                    p = (p / IP(src=src_if.local_ip4,
-                                dst=src_if.remote_ip4,
-                                ttl=ip_ttl) /
-                         UDP(sport=1234, dport=1234) /
-                         Raw(payload))
+                    p = (
+                        p
+                        / IP(src=src_if.local_ip4, dst=src_if.remote_ip4, ttl=ip_ttl)
+                        / UDP(sport=1234, dport=1234)
+                        / Raw(payload)
+                    )
                 else:
-                    p = (p / IP(src=src_if.local_ip4, dst=dst_ip, ttl=ip_ttl) /
-                         UDP(sport=1234, dport=1234) /
-                         Raw(payload))
+                    p = (
+                        p
+                        / IP(src=src_if.local_ip4, dst=dst_ip, ttl=ip_ttl)
+                        / UDP(sport=1234, dport=1234)
+                        / Raw(payload)
+                    )
             else:
-                p = (p / IP(src=ip_itf.remote_ip4,
-                            dst=ip_itf.local_ip4,
-                            ttl=ip_ttl) /
-                     ICMP())
+                p = (
+                    p
+                    / IP(src=ip_itf.remote_ip4, dst=ip_itf.local_ip4, ttl=ip_ttl)
+                    / ICMP()
+                )
 
             if chksum:
                 p[IP].chksum = chksum
@@ -163,18 +188,20 @@ class TestMPLS(VppTestCase):
             pkts.append(p)
         return pkts
 
-    def create_stream_ip4(self, src_if, dst_ip, ip_ttl=64,
-                          ip_dscp=0, payload_size=None):
+    def create_stream_ip4(
+        self, src_if, dst_ip, ip_ttl=64, ip_dscp=0, payload_size=None
+    ):
         self.reset_packet_infos()
         pkts = []
         for i in range(0, 257):
             info = self.create_packet_info(src_if, src_if)
             payload = self.info_to_payload(info)
-            p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
-                 IP(src=src_if.remote_ip4, dst=dst_ip,
-                    ttl=ip_ttl, tos=ip_dscp) /
-                 UDP(sport=1234, dport=1234) /
-                 Raw(payload))
+            p = (
+                Ether(dst=src_if.local_mac, src=src_if.remote_mac)
+                / IP(src=src_if.remote_ip4, dst=dst_ip, ttl=ip_ttl, tos=ip_dscp)
+                / UDP(sport=1234, dport=1234)
+                / Raw(payload)
+            )
             info.data = p.copy()
             if payload_size:
                 self.extend_packet(p, payload_size)
@@ -187,18 +214,19 @@ class TestMPLS(VppTestCase):
         for i in range(0, 257):
             info = self.create_packet_info(src_if, src_if)
             payload = self.info_to_payload(info)
-            p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
-                 IPv6(src=src_if.remote_ip6, dst=dst_ip,
-                      hlim=ip_ttl, tc=ip_dscp) /
-                 UDP(sport=1234, dport=1234) /
-                 Raw(payload))
+            p = (
+                Ether(dst=src_if.local_mac, src=src_if.remote_mac)
+                / IPv6(src=src_if.remote_ip6, dst=dst_ip, hlim=ip_ttl, tc=ip_dscp)
+                / UDP(sport=1234, dport=1234)
+                / Raw(payload)
+            )
             info.data = p.copy()
             pkts.append(p)
         return pkts
 
-    def create_stream_labelled_ip6(self, src_if, mpls_labels,
-                                   hlim=64, dst_ip=None,
-                                   ping=0, ip_itf=None):
+    def create_stream_labelled_ip6(
+        self, src_if, mpls_labels, hlim=64, dst_ip=None, ping=0, ip_itf=None
+    ):
         if dst_ip is None:
             dst_ip = src_if.remote_ip6
         self.reset_packet_infos()
@@ -211,19 +239,23 @@ class TestMPLS(VppTestCase):
                 p = p / MPLS(label=l.value, ttl=l.ttl, cos=l.exp)
 
             if ping:
-                p = p / (IPv6(src=ip_itf.remote_ip6,
-                              dst=ip_itf.local_ip6) /
-                         ICMPv6EchoRequest())
+                p = p / (
+                    IPv6(src=ip_itf.remote_ip6, dst=ip_itf.local_ip6)
+                    / ICMPv6EchoRequest()
+                )
             else:
-                p = p / (IPv6(src=src_if.remote_ip6, dst=dst_ip, hlim=hlim) /
-                         UDP(sport=1234, dport=1234) /
-                         Raw(payload))
+                p = p / (
+                    IPv6(src=src_if.remote_ip6, dst=dst_ip, hlim=hlim)
+                    / UDP(sport=1234, dport=1234)
+                    / Raw(payload)
+                )
             info.data = p.copy()
             pkts.append(p)
         return pkts
 
-    def verify_capture_ip4(self, src_if, capture, sent, ping_resp=0,
-                           ip_ttl=None, ip_dscp=0):
+    def verify_capture_ip4(
+        self, src_if, capture, sent, ping_resp=0, ip_ttl=None, ip_dscp=0
+    ):
         try:
             capture = verify_filter(capture, sent)
 
@@ -256,8 +288,9 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_labelled_ip4(self, src_if, capture, sent,
-                                    mpls_labels, ip_ttl=None):
+    def verify_capture_labelled_ip4(
+        self, src_if, capture, sent, mpls_labels, ip_ttl=None
+    ):
         try:
             capture = verify_filter(capture, sent)
 
@@ -282,8 +315,9 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_labelled_ip6(self, src_if, capture, sent,
-                                    mpls_labels, ip_ttl=None):
+    def verify_capture_labelled_ip6(
+        self, src_if, capture, sent, mpls_labels, ip_ttl=None
+    ):
         try:
             capture = verify_filter(capture, sent)
 
@@ -330,8 +364,7 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_labelled(self, src_if, capture, sent,
-                                mpls_labels):
+    def verify_capture_labelled(self, src_if, capture, sent, mpls_labels):
         try:
             capture = verify_filter(capture, sent)
 
@@ -343,9 +376,9 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_ip6(self, src_if, capture, sent,
-                           ip_hlim=None, ip_dscp=0,
-                           ping_resp=0):
+    def verify_capture_ip6(
+        self, src_if, capture, sent, ip_hlim=None, ip_dscp=0, ping_resp=0
+    ):
         try:
             self.assertEqual(len(capture), len(sent))
 
@@ -363,7 +396,7 @@ class TestMPLS(VppTestCase):
                 if not ping_resp:
                     self.assertEqual(rx_ip.src, tx_ip.src)
                     self.assertEqual(rx_ip.dst, tx_ip.dst)
-                    self.assertEqual(rx_ip.tc,  ip_dscp)
+                    self.assertEqual(rx_ip.tc, ip_dscp)
                     # IP processing post pop has decremented the TTL
                     if not ip_hlim:
                         self.assertEqual(rx_ip.hlim + 1, tx_ip.hlim)
@@ -402,8 +435,9 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_fragmented_labelled_ip4(self, src_if, capture, sent,
-                                               mpls_labels, ip_ttl=None):
+    def verify_capture_fragmented_labelled_ip4(
+        self, src_if, capture, sent, mpls_labels, ip_ttl=None
+    ):
         try:
             capture = verify_filter(capture, sent)
 
@@ -426,8 +460,9 @@ class TestMPLS(VppTestCase):
         except:
             raise
 
-    def verify_capture_fragmented_labelled_ip6(self, src_if, capture, sent,
-                                               mpls_labels, ip_ttl=None):
+    def verify_capture_fragmented_labelled_ip6(
+        self, src_if, capture, sent, mpls_labels, ip_ttl=None
+    ):
         try:
             capture = verify_filter(capture, sent)
 
@@ -452,82 +487,115 @@ class TestMPLS(VppTestCase):
             raise
 
     def test_swap(self):
-        """ MPLS label swap tests """
+        """MPLS label swap tests"""
 
         #
         # A simple MPLS xconnect - eos label in label out
         #
-        route_32_eos = VppMplsRoute(self, 32, 1,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(33)])])
+        route_32_eos = VppMplsRoute(
+            self,
+            32,
+            1,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(33)]
+                )
+            ],
+        )
         route_32_eos.add_vpp_config()
 
         self.assertTrue(
-            find_mpls_route(self, 0, 32, 1,
-                            [VppRoutePath(self.pg0.remote_ip4,
-                                          self.pg0.sw_if_index,
-                                          labels=[VppMplsLabel(33)])]))
+            find_mpls_route(
+                self,
+                0,
+                32,
+                1,
+                [
+                    VppRoutePath(
+                        self.pg0.remote_ip4,
+                        self.pg0.sw_if_index,
+                        labels=[VppMplsLabel(33)],
+                    )
+                ],
+            )
+        )
 
         #
         # a stream that matches the route for 10.0.0.1
         # PG0 is in the default table
         #
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(32, ttl=32, exp=1)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(32, ttl=32, exp=1)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(33, ttl=31, exp=1)])
+        self.verify_capture_labelled(
+            self.pg0, rx, tx, [VppMplsLabel(33, ttl=31, exp=1)]
+        )
 
-        self.assertEqual(route_32_eos.get_stats_to()['packets'], 257)
+        self.assertEqual(route_32_eos.get_stats_to()["packets"], 257)
 
         #
         # A simple MPLS xconnect - non-eos label in label out
         #
-        route_32_neos = VppMplsRoute(self, 32, 0,
-                                     [VppRoutePath(self.pg0.remote_ip4,
-                                                   self.pg0.sw_if_index,
-                                                   labels=[VppMplsLabel(33)])])
+        route_32_neos = VppMplsRoute(
+            self,
+            32,
+            0,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(33)]
+                )
+            ],
+        )
         route_32_neos.add_vpp_config()
 
         #
         # a stream that matches the route for 10.0.0.1
         # PG0 is in the default table
         #
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(32, ttl=21, exp=7),
-                                              VppMplsLabel(99)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(32, ttl=21, exp=7), VppMplsLabel(99)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(33, ttl=20, exp=7),
-                                      VppMplsLabel(99)])
-        self.assertEqual(route_32_neos.get_stats_to()['packets'], 257)
+        self.verify_capture_labelled(
+            self.pg0, rx, tx, [VppMplsLabel(33, ttl=20, exp=7), VppMplsLabel(99)]
+        )
+        self.assertEqual(route_32_neos.get_stats_to()["packets"], 257)
 
         #
         # A simple MPLS xconnect - non-eos label in label out, uniform mode
         #
         route_42_neos = VppMplsRoute(
-            self, 42, 0,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(43, MplsLspMode.UNIFORM)])])
+            self,
+            42,
+            0,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(43, MplsLspMode.UNIFORM)],
+                )
+            ],
+        )
         route_42_neos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(42, ttl=21, exp=7),
-                                              VppMplsLabel(99)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(42, ttl=21, exp=7), VppMplsLabel(99)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(43, ttl=20, exp=7),
-                                      VppMplsLabel(99)])
+        self.verify_capture_labelled(
+            self.pg0, rx, tx, [VppMplsLabel(43, ttl=20, exp=7), VppMplsLabel(99)]
+        )
 
         #
         # An MPLS xconnect - EOS label in IP out
         #
-        route_33_eos = VppMplsRoute(self, 33, 1,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[])])
+        route_33_eos = VppMplsRoute(
+            self,
+            33,
+            1,
+            [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[])],
+        )
         route_33_eos.add_vpp_config()
 
         tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(33)])
@@ -537,30 +605,36 @@ class TestMPLS(VppTestCase):
         #
         # disposed packets have an invalid IPv4 checksum
         #
-        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(33)],
-                                             dst_ip=self.pg0.remote_ip4,
-                                             n=65,
-                                             chksum=1)
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(33)], dst_ip=self.pg0.remote_ip4, n=65, chksum=1
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "Invalid Checksum")
 
         #
         # An MPLS xconnect - EOS label in IP out, uniform mode
         #
         route_3333_eos = VppMplsRoute(
-            self, 3333, 1,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(3, MplsLspMode.UNIFORM)])])
+            self,
+            3333,
+            1,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(3, MplsLspMode.UNIFORM)],
+                )
+            ],
+        )
         route_3333_eos.add_vpp_config()
 
         tx = self.create_stream_labelled_ip4(
-            self.pg0,
-            [VppMplsLabel(3333, ttl=55, exp=3)])
+            self.pg0, [VppMplsLabel(3333, ttl=55, exp=3)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         self.verify_capture_ip4(self.pg0, rx, tx, ip_ttl=54, ip_dscp=0x60)
         tx = self.create_stream_labelled_ip4(
-            self.pg0,
-            [VppMplsLabel(3333, ttl=66, exp=4)])
+            self.pg0, [VppMplsLabel(3333, ttl=66, exp=4)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         self.verify_capture_ip4(self.pg0, rx, tx, ip_ttl=65, ip_dscp=0x80)
 
@@ -568,11 +642,12 @@ class TestMPLS(VppTestCase):
         # An MPLS xconnect - EOS label in IPv6 out
         #
         route_333_eos = VppMplsRoute(
-            self, 333, 1,
-            [VppRoutePath(self.pg0.remote_ip6,
-                          self.pg0.sw_if_index,
-                          labels=[])],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)
+            self,
+            333,
+            1,
+            [VppRoutePath(self.pg0.remote_ip6, self.pg0.sw_if_index, labels=[])],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+        )
         route_333_eos.add_vpp_config()
 
         tx = self.create_stream_labelled_ip6(self.pg0, [VppMplsLabel(333)])
@@ -582,10 +657,9 @@ class TestMPLS(VppTestCase):
         #
         # disposed packets have an TTL expired
         #
-        tx = self.create_stream_labelled_ip6(self.pg0,
-                                             [VppMplsLabel(333, ttl=64)],
-                                             dst_ip=self.pg1.remote_ip6,
-                                             hlim=1)
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(333, ttl=64)], dst_ip=self.pg1.remote_ip6, hlim=1
+        )
         rx = self.send_and_expect_some(self.pg0, tx, self.pg0)
         self.verify_capture_ip6_icmp(self.pg0, rx, tx)
 
@@ -593,15 +667,19 @@ class TestMPLS(VppTestCase):
         # An MPLS xconnect - EOS label in IPv6 out w imp-null
         #
         route_334_eos = VppMplsRoute(
-            self, 334, 1,
-            [VppRoutePath(self.pg0.remote_ip6,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(3)])],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)
+            self,
+            334,
+            1,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip6, self.pg0.sw_if_index, labels=[VppMplsLabel(3)]
+                )
+            ],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+        )
         route_334_eos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip6(self.pg0,
-                                             [VppMplsLabel(334, ttl=64)])
+        tx = self.create_stream_labelled_ip6(self.pg0, [VppMplsLabel(334, ttl=64)])
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         self.verify_capture_ip6(self.pg0, rx, tx)
 
@@ -609,25 +687,32 @@ class TestMPLS(VppTestCase):
         # An MPLS xconnect - EOS label in IPv6 out w imp-null in uniform mode
         #
         route_335_eos = VppMplsRoute(
-            self, 335, 1,
-            [VppRoutePath(self.pg0.remote_ip6,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(3, MplsLspMode.UNIFORM)])],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)
+            self,
+            335,
+            1,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip6,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(3, MplsLspMode.UNIFORM)],
+                )
+            ],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+        )
         route_335_eos.add_vpp_config()
 
         tx = self.create_stream_labelled_ip6(
-            self.pg0,
-            [VppMplsLabel(335, ttl=27, exp=4)])
+            self.pg0, [VppMplsLabel(335, ttl=27, exp=4)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         self.verify_capture_ip6(self.pg0, rx, tx, ip_hlim=26, ip_dscp=0x80)
 
         #
         # disposed packets have an TTL expired
         #
-        tx = self.create_stream_labelled_ip6(self.pg0, [VppMplsLabel(334)],
-                                             dst_ip=self.pg1.remote_ip6,
-                                             hlim=0)
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(334)], dst_ip=self.pg1.remote_ip6, hlim=0
+        )
         rx = self.send_and_expect_some(self.pg0, tx, self.pg0)
         self.verify_capture_ip6_icmp(self.pg0, rx, tx)
 
@@ -635,104 +720,136 @@ class TestMPLS(VppTestCase):
         # An MPLS xconnect - non-EOS label in IP out - an invalid configuration
         # so this traffic should be dropped.
         #
-        route_33_neos = VppMplsRoute(self, 33, 0,
-                                     [VppRoutePath(self.pg0.remote_ip4,
-                                                   self.pg0.sw_if_index,
-                                                   labels=[])])
+        route_33_neos = VppMplsRoute(
+            self,
+            33,
+            0,
+            [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[])],
+        )
         route_33_neos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(33),
-                                              VppMplsLabel(99)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(33), VppMplsLabel(99)]
+        )
         self.send_and_assert_no_replies(
-            self.pg0, tx,
-            "MPLS non-EOS packets popped and forwarded")
+            self.pg0, tx, "MPLS non-EOS packets popped and forwarded"
+        )
 
         #
         # A recursive EOS x-connect, which resolves through another x-connect
         # in pipe mode
         #
-        route_34_eos = VppMplsRoute(self, 34, 1,
-                                    [VppRoutePath("0.0.0.0",
-                                                  0xffffffff,
-                                                  nh_via_label=32,
-                                                  labels=[VppMplsLabel(44),
-                                                          VppMplsLabel(45)])])
+        route_34_eos = VppMplsRoute(
+            self,
+            34,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    0xFFFFFFFF,
+                    nh_via_label=32,
+                    labels=[VppMplsLabel(44), VppMplsLabel(45)],
+                )
+            ],
+        )
         route_34_eos.add_vpp_config()
         self.logger.info(self.vapi.cli("sh mpls fib 34"))
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(34, ttl=3)])
+        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(34, ttl=3)])
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(33),
-                                      VppMplsLabel(44),
-                                      VppMplsLabel(45, ttl=2)])
+        self.verify_capture_labelled(
+            self.pg0,
+            rx,
+            tx,
+            [VppMplsLabel(33), VppMplsLabel(44), VppMplsLabel(45, ttl=2)],
+        )
 
-        self.assertEqual(route_34_eos.get_stats_to()['packets'], 257)
-        self.assertEqual(route_32_neos.get_stats_via()['packets'], 257)
+        self.assertEqual(route_34_eos.get_stats_to()["packets"], 257)
+        self.assertEqual(route_32_neos.get_stats_via()["packets"], 257)
 
         #
         # A recursive EOS x-connect, which resolves through another x-connect
         # in uniform mode
         #
         route_35_eos = VppMplsRoute(
-            self, 35, 1,
-            [VppRoutePath("0.0.0.0",
-                          0xffffffff,
-                          nh_via_label=42,
-                          labels=[VppMplsLabel(44)])])
+            self,
+            35,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0", 0xFFFFFFFF, nh_via_label=42, labels=[VppMplsLabel(44)]
+                )
+            ],
+        )
         route_35_eos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(35, ttl=3)])
+        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(35, ttl=3)])
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(43, ttl=2),
-                                      VppMplsLabel(44, ttl=2)])
+        self.verify_capture_labelled(
+            self.pg0, rx, tx, [VppMplsLabel(43, ttl=2), VppMplsLabel(44, ttl=2)]
+        )
 
         #
         # A recursive non-EOS x-connect, which resolves through another
         # x-connect
         #
-        route_34_neos = VppMplsRoute(self, 34, 0,
-                                     [VppRoutePath("0.0.0.0",
-                                                   0xffffffff,
-                                                   nh_via_label=32,
-                                                   labels=[VppMplsLabel(44),
-                                                           VppMplsLabel(46)])])
+        route_34_neos = VppMplsRoute(
+            self,
+            34,
+            0,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    0xFFFFFFFF,
+                    nh_via_label=32,
+                    labels=[VppMplsLabel(44), VppMplsLabel(46)],
+                )
+            ],
+        )
         route_34_neos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(34, ttl=45),
-                                              VppMplsLabel(99)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34, ttl=45), VppMplsLabel(99)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         # it's the 2nd (counting from 0) label in the stack that is swapped
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(33),
-                                      VppMplsLabel(44),
-                                      VppMplsLabel(46, ttl=44),
-                                      VppMplsLabel(99)])
+        self.verify_capture_labelled(
+            self.pg0,
+            rx,
+            tx,
+            [
+                VppMplsLabel(33),
+                VppMplsLabel(44),
+                VppMplsLabel(46, ttl=44),
+                VppMplsLabel(99),
+            ],
+        )
 
         #
         # an recursive IP route that resolves through the recursive non-eos
         # x-connect
         #
-        ip_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                 [VppRoutePath("0.0.0.0",
-                                               0xffffffff,
-                                               nh_via_label=34,
-                                               labels=[VppMplsLabel(55)])])
+        ip_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            [
+                VppRoutePath(
+                    "0.0.0.0", 0xFFFFFFFF, nh_via_label=34, labels=[VppMplsLabel(55)]
+                )
+            ],
+        )
         ip_10_0_0_1.add_vpp_config()
 
         tx = self.create_stream_ip4(self.pg0, "10.0.0.1")
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(33),
-                                          VppMplsLabel(44),
-                                          VppMplsLabel(46),
-                                          VppMplsLabel(55)])
-        self.assertEqual(ip_10_0_0_1.get_stats_to()['packets'], 257)
+        self.verify_capture_labelled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [VppMplsLabel(33), VppMplsLabel(44), VppMplsLabel(46), VppMplsLabel(55)],
+        )
+        self.assertEqual(ip_10_0_0_1.get_stats_to()["packets"], 257)
 
         ip_10_0_0_1.remove_vpp_config()
         route_34_neos.remove_vpp_config()
@@ -743,15 +860,21 @@ class TestMPLS(VppTestCase):
         route_32_eos.remove_vpp_config()
 
     def test_bind(self):
-        """ MPLS Local Label Binding test """
+        """MPLS Local Label Binding test"""
 
         #
         # Add a non-recursive route with a single out label
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(45)])])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(45)]
+                )
+            ],
+        )
         route_10_0_0_1.add_vpp_config()
 
         # bind a local label to the route
@@ -759,19 +882,18 @@ class TestMPLS(VppTestCase):
         binding.add_vpp_config()
 
         # non-EOS stream
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(44),
-                                              VppMplsLabel(99)])
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(44), VppMplsLabel(99)]
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(45, ttl=63),
-                                      VppMplsLabel(99)])
+        self.verify_capture_labelled(
+            self.pg0, rx, tx, [VppMplsLabel(45, ttl=63), VppMplsLabel(99)]
+        )
 
         # EOS stream
         tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(44)])
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled(self.pg0, rx, tx,
-                                     [VppMplsLabel(45, ttl=63)])
+        self.verify_capture_labelled(self.pg0, rx, tx, [VppMplsLabel(45, ttl=63)])
 
         # IP stream
         tx = self.create_stream_ip4(self.pg0, "10.0.0.1")
@@ -785,15 +907,21 @@ class TestMPLS(VppTestCase):
         route_10_0_0_1.remove_vpp_config()
 
     def test_imposition(self):
-        """ MPLS label imposition test """
+        """MPLS label imposition test"""
 
         #
         # Add a non-recursive route with a single out label
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(32)])])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(32)]
+                )
+            ],
+        )
         route_10_0_0_1.add_vpp_config()
 
         #
@@ -807,65 +935,86 @@ class TestMPLS(VppTestCase):
         #
         # Add a non-recursive route with a 3 out labels
         #
-        route_10_0_0_2 = VppIpRoute(self, "10.0.0.2", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(32),
-                                                          VppMplsLabel(33),
-                                                          VppMplsLabel(34)])])
+        route_10_0_0_2 = VppIpRoute(
+            self,
+            "10.0.0.2",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(32), VppMplsLabel(33), VppMplsLabel(34)],
+                )
+            ],
+        )
         route_10_0_0_2.add_vpp_config()
 
-        tx = self.create_stream_ip4(self.pg0, "10.0.0.2",
-                                    ip_ttl=44, ip_dscp=0xff)
+        tx = self.create_stream_ip4(self.pg0, "10.0.0.2", ip_ttl=44, ip_dscp=0xFF)
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(32),
-                                          VppMplsLabel(33),
-                                          VppMplsLabel(34)],
-                                         ip_ttl=43)
+        self.verify_capture_labelled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [VppMplsLabel(32), VppMplsLabel(33), VppMplsLabel(34)],
+            ip_ttl=43,
+        )
 
         #
         # Add a non-recursive route with a single out label in uniform mode
         #
         route_10_0_0_3 = VppIpRoute(
-            self, "10.0.0.3", 32,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(32,
-                                               mode=MplsLspMode.UNIFORM)])])
+            self,
+            "10.0.0.3",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(32, mode=MplsLspMode.UNIFORM)],
+                )
+            ],
+        )
         route_10_0_0_3.add_vpp_config()
 
-        tx = self.create_stream_ip4(self.pg0, "10.0.0.3",
-                                    ip_ttl=54, ip_dscp=0xbe)
+        tx = self.create_stream_ip4(self.pg0, "10.0.0.3", ip_ttl=54, ip_dscp=0xBE)
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(32, ttl=53, exp=5)])
+        self.verify_capture_labelled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(32, ttl=53, exp=5)]
+        )
 
         #
         # Add a IPv6 non-recursive route with a single out label in
         # uniform mode
         #
         route_2001_3 = VppIpRoute(
-            self, "2001::3", 128,
-            [VppRoutePath(self.pg0.remote_ip6,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(32,
-                                               mode=MplsLspMode.UNIFORM)])])
+            self,
+            "2001::3",
+            128,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip6,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(32, mode=MplsLspMode.UNIFORM)],
+                )
+            ],
+        )
         route_2001_3.add_vpp_config()
 
-        tx = self.create_stream_ip6(self.pg0, "2001::3",
-                                    ip_ttl=54, ip_dscp=0xbe)
+        tx = self.create_stream_ip6(self.pg0, "2001::3", ip_ttl=54, ip_dscp=0xBE)
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip6(self.pg0, rx, tx,
-                                         [VppMplsLabel(32, ttl=53, exp=5)])
+        self.verify_capture_labelled_ip6(
+            self.pg0, rx, tx, [VppMplsLabel(32, ttl=53, exp=5)]
+        )
 
         #
         # add a recursive path, with output label, via the 1 label route
         #
-        route_11_0_0_1 = VppIpRoute(self, "11.0.0.1", 32,
-                                    [VppRoutePath("10.0.0.1",
-                                                  0xffffffff,
-                                                  labels=[VppMplsLabel(44)])])
+        route_11_0_0_1 = VppIpRoute(
+            self,
+            "11.0.0.1",
+            32,
+            [VppRoutePath("10.0.0.1", 0xFFFFFFFF, labels=[VppMplsLabel(44)])],
+        )
         route_11_0_0_1.add_vpp_config()
 
         #
@@ -874,20 +1023,25 @@ class TestMPLS(VppTestCase):
         #
         tx = self.create_stream_ip4(self.pg0, "11.0.0.1")
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(32),
-                                          VppMplsLabel(44)])
+        self.verify_capture_labelled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(32), VppMplsLabel(44)]
+        )
 
-        self.assertEqual(route_11_0_0_1.get_stats_to()['packets'], 257)
+        self.assertEqual(route_11_0_0_1.get_stats_to()["packets"], 257)
 
         #
         # add a recursive path, with 2 labels, via the 3 label route
         #
-        route_11_0_0_2 = VppIpRoute(self, "11.0.0.2", 32,
-                                    [VppRoutePath("10.0.0.2",
-                                                  0xffffffff,
-                                                  labels=[VppMplsLabel(44),
-                                                          VppMplsLabel(45)])])
+        route_11_0_0_2 = VppIpRoute(
+            self,
+            "11.0.0.2",
+            32,
+            [
+                VppRoutePath(
+                    "10.0.0.2", 0xFFFFFFFF, labels=[VppMplsLabel(44), VppMplsLabel(45)]
+                )
+            ],
+        )
         route_11_0_0_2.add_vpp_config()
 
         #
@@ -896,24 +1050,36 @@ class TestMPLS(VppTestCase):
         #
         tx = self.create_stream_ip4(self.pg0, "11.0.0.2")
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(32),
-                                          VppMplsLabel(33),
-                                          VppMplsLabel(34),
-                                          VppMplsLabel(44),
-                                          VppMplsLabel(45)])
-
-        self.assertEqual(route_11_0_0_2.get_stats_to()['packets'], 257)
+        self.verify_capture_labelled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [
+                VppMplsLabel(32),
+                VppMplsLabel(33),
+                VppMplsLabel(34),
+                VppMplsLabel(44),
+                VppMplsLabel(45),
+            ],
+        )
+
+        self.assertEqual(route_11_0_0_2.get_stats_to()["packets"], 257)
 
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(32),
-                                          VppMplsLabel(33),
-                                          VppMplsLabel(34),
-                                          VppMplsLabel(44),
-                                          VppMplsLabel(45)])
+        self.verify_capture_labelled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [
+                VppMplsLabel(32),
+                VppMplsLabel(33),
+                VppMplsLabel(34),
+                VppMplsLabel(44),
+                VppMplsLabel(45),
+            ],
+        )
 
-        self.assertEqual(route_11_0_0_2.get_stats_to()['packets'], 514)
+        self.assertEqual(route_11_0_0_2.get_stats_to()["packets"], 514)
 
         #
         # cleanup
@@ -924,20 +1090,32 @@ class TestMPLS(VppTestCase):
         route_10_0_0_1.remove_vpp_config()
 
     def test_imposition_fragmentation(self):
-        """ MPLS label imposition fragmentation test """
+        """MPLS label imposition fragmentation test"""
 
         #
         # Add a ipv4 non-recursive route with a single out label
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(32)])])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(32)]
+                )
+            ],
+        )
         route_10_0_0_1.add_vpp_config()
-        route_1000_1 = VppIpRoute(self, "1000::1", 128,
-                                  [VppRoutePath(self.pg0.remote_ip6,
-                                                self.pg0.sw_if_index,
-                                                labels=[VppMplsLabel(32)])])
+        route_1000_1 = VppIpRoute(
+            self,
+            "1000::1",
+            128,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip6, self.pg0.sw_if_index, labels=[VppMplsLabel(32)]
+                )
+            ],
+        )
         route_1000_1.add_vpp_config()
 
         #
@@ -952,24 +1130,29 @@ class TestMPLS(VppTestCase):
         # 5 fragments per packet (257*5=1285)
         #
         rx = self.send_and_expect(self.pg0, tx, self.pg0, 1285)
-        self.verify_capture_fragmented_labelled_ip4(self.pg0, rx, tx,
-                                                    [VppMplsLabel(32)])
+        self.verify_capture_fragmented_labelled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(32)]
+        )
 
         # packets with DF bit set generate ICMP
         for t in tx:
-            t[IP].flags = 'DF'
+            t[IP].flags = "DF"
         rxs = self.send_and_expect_some(self.pg0, tx, self.pg0)
 
         for rx in rxs:
             self.assertEqual(icmptypes[rx[ICMP].type], "dest-unreach")
-            self.assertEqual(icmpcodes[rx[ICMP].type][rx[ICMP].code],
-                             "fragmentation-needed")
+            self.assertEqual(
+                icmpcodes[rx[ICMP].type][rx[ICMP].code], "fragmentation-needed"
+            )
             # the link MTU is 9000, the MPLS over head is 4 bytes
             self.assertEqual(rx[ICMP].nexthopmtu, 9000 - 4)
 
-        self.assertEqual(self.statistics.get_err_counter(
-            "/err/mpls-frag/can't fragment this packet"),
-                         len(tx))
+        self.assertEqual(
+            self.statistics.get_err_counter(
+                "/err/mpls-frag/can't fragment this packet"
+            ),
+            len(tx),
+        )
         #
         # a stream that matches the route for 1000::1/128
         # PG0 is in the default table
@@ -988,26 +1171,30 @@ class TestMPLS(VppTestCase):
         route_10_0_0_1.remove_vpp_config()
 
     def test_tunnel_pipe(self):
-        """ MPLS Tunnel Tests - Pipe """
+        """MPLS Tunnel Tests - Pipe"""
 
         #
         # Create a tunnel with two out labels
         #
         mpls_tun = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(44),
-                                  VppMplsLabel(46)])])
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(44), VppMplsLabel(46)],
+                )
+            ],
+        )
         mpls_tun.add_vpp_config()
         mpls_tun.admin_up()
 
         #
         # add an unlabelled route through the new tunnel
         #
-        route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32,
-                                    [VppRoutePath("0.0.0.0",
-                                                  mpls_tun._sw_if_index)])
+        route_10_0_0_3 = VppIpRoute(
+            self, "10.0.0.3", 32, [VppRoutePath("0.0.0.0", mpls_tun._sw_if_index)]
+        )
         route_10_0_0_3.add_vpp_config()
 
         self.vapi.cli("clear trace")
@@ -1018,17 +1205,19 @@ class TestMPLS(VppTestCase):
         self.pg_start()
 
         rx = self.pg0.get_capture()
-        self.verify_capture_tunneled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(44),
-                                          VppMplsLabel(46)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(44), VppMplsLabel(46)]
+        )
 
         #
         # add a labelled route through the new tunnel
         #
-        route_10_0_0_4 = VppIpRoute(self, "10.0.0.4", 32,
-                                    [VppRoutePath("0.0.0.0",
-                                                  mpls_tun._sw_if_index,
-                                                  labels=[33])])
+        route_10_0_0_4 = VppIpRoute(
+            self,
+            "10.0.0.4",
+            32,
+            [VppRoutePath("0.0.0.0", mpls_tun._sw_if_index, labels=[33])],
+        )
         route_10_0_0_4.add_vpp_config()
 
         self.vapi.cli("clear trace")
@@ -1039,10 +1228,12 @@ class TestMPLS(VppTestCase):
         self.pg_start()
 
         rx = self.pg0.get_capture()
-        self.verify_capture_tunneled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(44),
-                                          VppMplsLabel(46),
-                                          VppMplsLabel(33, ttl=255)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [VppMplsLabel(44), VppMplsLabel(46), VppMplsLabel(33, ttl=255)],
+        )
 
         #
         # change tunnel's MTU to a low value
@@ -1050,34 +1241,34 @@ class TestMPLS(VppTestCase):
         mpls_tun.set_l3_mtu(1200)
 
         # send IP into the tunnel to be fragmented
-        tx = self.create_stream_ip4(self.pg0, "10.0.0.3",
-                                    payload_size=1500)
-        rx = self.send_and_expect(self.pg0, tx, self.pg0, len(tx)*2)
+        tx = self.create_stream_ip4(self.pg0, "10.0.0.3", payload_size=1500)
+        rx = self.send_and_expect(self.pg0, tx, self.pg0, len(tx) * 2)
 
         fake_tx = []
         for p in tx:
             fake_tx.append(p)
             fake_tx.append(p)
-        self.verify_capture_tunneled_ip4(self.pg0, rx, fake_tx,
-                                         [VppMplsLabel(44),
-                                          VppMplsLabel(46)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0, rx, fake_tx, [VppMplsLabel(44), VppMplsLabel(46)]
+        )
 
         # send MPLS into the tunnel to be fragmented
-        tx = self.create_stream_ip4(self.pg0, "10.0.0.4",
-                                    payload_size=1500)
-        rx = self.send_and_expect(self.pg0, tx, self.pg0, len(tx)*2)
+        tx = self.create_stream_ip4(self.pg0, "10.0.0.4", payload_size=1500)
+        rx = self.send_and_expect(self.pg0, tx, self.pg0, len(tx) * 2)
 
         fake_tx = []
         for p in tx:
             fake_tx.append(p)
             fake_tx.append(p)
-        self.verify_capture_tunneled_ip4(self.pg0, rx, fake_tx,
-                                         [VppMplsLabel(44),
-                                          VppMplsLabel(46),
-                                          VppMplsLabel(33, ttl=255)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0,
+            rx,
+            fake_tx,
+            [VppMplsLabel(44), VppMplsLabel(46), VppMplsLabel(33, ttl=255)],
+        )
 
     def test_tunnel_uniform(self):
-        """ MPLS Tunnel Tests - Uniform """
+        """MPLS Tunnel Tests - Uniform"""
 
         #
         # Create a tunnel with a single out label
@@ -1085,19 +1276,26 @@ class TestMPLS(VppTestCase):
         #
         mpls_tun = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(44, ttl=32),
-                                  VppMplsLabel(46, MplsLspMode.UNIFORM)])])
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[
+                        VppMplsLabel(44, ttl=32),
+                        VppMplsLabel(46, MplsLspMode.UNIFORM),
+                    ],
+                )
+            ],
+        )
         mpls_tun.add_vpp_config()
         mpls_tun.admin_up()
 
         #
         # add an unlabelled route through the new tunnel
         #
-        route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32,
-                                    [VppRoutePath("0.0.0.0",
-                                                  mpls_tun._sw_if_index)])
+        route_10_0_0_3 = VppIpRoute(
+            self, "10.0.0.3", 32, [VppRoutePath("0.0.0.0", mpls_tun._sw_if_index)]
+        )
         route_10_0_0_3.add_vpp_config()
 
         self.vapi.cli("clear trace")
@@ -1108,18 +1306,23 @@ class TestMPLS(VppTestCase):
         self.pg_start()
 
         rx = self.pg0.get_capture()
-        self.verify_capture_tunneled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(44, ttl=32),
-                                          VppMplsLabel(46, ttl=23)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(44, ttl=32), VppMplsLabel(46, ttl=23)]
+        )
 
         #
         # add a labelled route through the new tunnel
         #
         route_10_0_0_4 = VppIpRoute(
-            self, "10.0.0.4", 32,
-            [VppRoutePath("0.0.0.0",
-                          mpls_tun._sw_if_index,
-                          labels=[VppMplsLabel(33, ttl=47)])])
+            self,
+            "10.0.0.4",
+            32,
+            [
+                VppRoutePath(
+                    "0.0.0.0", mpls_tun._sw_if_index, labels=[VppMplsLabel(33, ttl=47)]
+                )
+            ],
+        )
         route_10_0_0_4.add_vpp_config()
 
         self.vapi.cli("clear trace")
@@ -1130,45 +1333,63 @@ class TestMPLS(VppTestCase):
         self.pg_start()
 
         rx = self.pg0.get_capture()
-        self.verify_capture_tunneled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(44, ttl=32),
-                                          VppMplsLabel(46, ttl=47),
-                                          VppMplsLabel(33, ttl=47)])
+        self.verify_capture_tunneled_ip4(
+            self.pg0,
+            rx,
+            tx,
+            [
+                VppMplsLabel(44, ttl=32),
+                VppMplsLabel(46, ttl=47),
+                VppMplsLabel(33, ttl=47),
+            ],
+        )
 
     def test_mpls_tunnel_many(self):
-        """ MPLS Multiple Tunnels """
+        """MPLS Multiple Tunnels"""
 
         for ii in range(100):
             mpls_tun = VppMPLSTunnelInterface(
                 self,
-                [VppRoutePath(self.pg0.remote_ip4,
-                              self.pg0.sw_if_index,
-                              labels=[VppMplsLabel(44, ttl=32),
-                                      VppMplsLabel(46, MplsLspMode.UNIFORM)])])
+                [
+                    VppRoutePath(
+                        self.pg0.remote_ip4,
+                        self.pg0.sw_if_index,
+                        labels=[
+                            VppMplsLabel(44, ttl=32),
+                            VppMplsLabel(46, MplsLspMode.UNIFORM),
+                        ],
+                    )
+                ],
+            )
             mpls_tun.add_vpp_config()
             mpls_tun.admin_up()
         for ii in range(100):
             mpls_tun = VppMPLSTunnelInterface(
                 self,
-                [VppRoutePath(self.pg0.remote_ip4,
-                              self.pg0.sw_if_index,
-                              labels=[VppMplsLabel(44, ttl=32),
-                                      VppMplsLabel(46, MplsLspMode.UNIFORM)])],
-                is_l2=1)
+                [
+                    VppRoutePath(
+                        self.pg0.remote_ip4,
+                        self.pg0.sw_if_index,
+                        labels=[
+                            VppMplsLabel(44, ttl=32),
+                            VppMplsLabel(46, MplsLspMode.UNIFORM),
+                        ],
+                    )
+                ],
+                is_l2=1,
+            )
             mpls_tun.add_vpp_config()
             mpls_tun.admin_up()
 
     def test_v4_exp_null(self):
-        """ MPLS V4 Explicit NULL test """
+        """MPLS V4 Explicit NULL test"""
 
         #
         # The first test case has an MPLS TTL of 0
         # all packet should be dropped
         #
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(0, ttl=0)])
-        self.send_and_assert_no_replies(self.pg0, tx,
-                                        "MPLS TTL=0 packets forwarded")
+        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(0, ttl=0)])
+        self.send_and_assert_no_replies(self.pg0, tx, "MPLS TTL=0 packets forwarded")
 
         #
         # a stream with a non-zero MPLS TTL
@@ -1188,7 +1409,7 @@ class TestMPLS(VppTestCase):
         self.verify_capture_ip4(self.pg1, rx, tx)
 
     def test_v6_exp_null(self):
-        """ MPLS V6 Explicit NULL test """
+        """MPLS V6 Explicit NULL test"""
 
         #
         # a stream with a non-zero MPLS TTL
@@ -1208,42 +1429,40 @@ class TestMPLS(VppTestCase):
         self.verify_capture_ip6(self.pg0, rx, tx)
 
     def test_deag(self):
-        """ MPLS Deagg """
+        """MPLS Deagg"""
 
         #
         # A de-agg route - next-hop lookup in default table
         #
-        route_34_eos = VppMplsRoute(self, 34, 1,
-                                    [VppRoutePath("0.0.0.0",
-                                                  0xffffffff,
-                                                  nh_table_id=0)])
+        route_34_eos = VppMplsRoute(
+            self, 34, 1, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=0)]
+        )
         route_34_eos.add_vpp_config()
 
         #
         # ping an interface in the default table
         # PG0 is in the default table
         #
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(34)],
-                                             ping=1,
-                                             ip_itf=self.pg0)
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], ping=1, ip_itf=self.pg0
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
         self.verify_capture_ip4(self.pg0, rx, tx, ping_resp=1)
 
         #
         # A de-agg route - next-hop lookup in non-default table
         #
-        route_35_eos = VppMplsRoute(self, 35, 1,
-                                    [VppRoutePath("0.0.0.0",
-                                                  0xffffffff,
-                                                  nh_table_id=1)])
+        route_35_eos = VppMplsRoute(
+            self, 35, 1, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=1)]
+        )
         route_35_eos.add_vpp_config()
         route_356_eos = VppMplsRoute(
-            self, 356, 1,
-            [VppRoutePath("0::0",
-                          0xffffffff,
-                          nh_table_id=1)],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)
+            self,
+            356,
+            1,
+            [VppRoutePath("0::0", 0xFFFFFFFF, nh_table_id=1)],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+        )
         route_356_eos.add_vpp_config()
 
         #
@@ -1252,26 +1471,25 @@ class TestMPLS(VppTestCase):
         # default table and egress unlabelled in the non-default
         #
         tx = self.create_stream_labelled_ip4(
-            self.pg0, [VppMplsLabel(35)], ping=1, ip_itf=self.pg1)
+            self.pg0, [VppMplsLabel(35)], ping=1, ip_itf=self.pg1
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip4(self.pg1, rx, tx, ping_resp=1)
         tx = self.create_stream_labelled_ip6(
-            self.pg0, [VppMplsLabel(356)], ping=1, ip_itf=self.pg1)
+            self.pg0, [VppMplsLabel(356)], ping=1, ip_itf=self.pg1
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip6(self.pg1, rx, tx, ping_resp=1)
 
         #
         # Double pop
         #
-        route_36_neos = VppMplsRoute(self, 36, 0,
-                                     [VppRoutePath("0.0.0.0",
-                                                   0xffffffff)])
+        route_36_neos = VppMplsRoute(self, 36, 0, [VppRoutePath("0.0.0.0", 0xFFFFFFFF)])
         route_36_neos.add_vpp_config()
 
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(36),
-                                              VppMplsLabel(35)],
-                                             ping=1, ip_itf=self.pg1)
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(36), VppMplsLabel(35)], ping=1, ip_itf=self.pg1
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip4(self.pg1, rx, tx, ping_resp=1)
 
@@ -1280,16 +1498,19 @@ class TestMPLS(VppTestCase):
         route_34_eos.remove_vpp_config()
 
     def test_interface_rx(self):
-        """ MPLS Interface Receive """
+        """MPLS Interface Receive"""
 
         #
         # Add a non-recursive route that will forward the traffic
         # post-interface-rx
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    table_id=1,
-                                    paths=[VppRoutePath(self.pg1.remote_ip4,
-                                                        self.pg1.sw_if_index)])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            table_id=1,
+            paths=[VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)],
+        )
         route_10_0_0_1.add_vpp_config()
 
         #
@@ -1301,33 +1522,43 @@ class TestMPLS(VppTestCase):
         # so as to have matched the route in table 1
         #
         route_34_eos = VppMplsRoute(
-            self, 34, 1,
-            [VppRoutePath("0.0.0.0",
-                          self.pg1.sw_if_index,
-                          type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX)])
+            self,
+            34,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    self.pg1.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                )
+            ],
+        )
         route_34_eos.add_vpp_config()
 
         #
         # ping an interface in the default table
         # PG0 is in the default table
         #
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(34)],
-                                             dst_ip="10.0.0.1")
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], dst_ip="10.0.0.1"
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip4(self.pg1, rx, tx)
 
     def test_mcast_mid_point(self):
-        """ MPLS Multicast Mid Point """
+        """MPLS Multicast Mid Point"""
 
         #
         # Add a non-recursive route that will forward the traffic
         # post-interface-rx
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    table_id=1,
-                                    paths=[VppRoutePath(self.pg1.remote_ip4,
-                                                        self.pg1.sw_if_index)])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            table_id=1,
+            paths=[VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)],
+        )
         route_10_0_0_1.add_vpp_config()
 
         #
@@ -1335,17 +1566,28 @@ class TestMPLS(VppTestCase):
         # and replicate to a interface-rx (like a bud node would)
         #
         route_3400_eos = VppMplsRoute(
-            self, 3400, 1,
-            [VppRoutePath(self.pg2.remote_ip4,
-                          self.pg2.sw_if_index,
-                          labels=[VppMplsLabel(3401)]),
-             VppRoutePath(self.pg3.remote_ip4,
-                          self.pg3.sw_if_index,
-                          labels=[VppMplsLabel(3402)]),
-             VppRoutePath("0.0.0.0",
-                          self.pg1.sw_if_index,
-                          type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX)],
-            is_multicast=1)
+            self,
+            3400,
+            1,
+            [
+                VppRoutePath(
+                    self.pg2.remote_ip4,
+                    self.pg2.sw_if_index,
+                    labels=[VppMplsLabel(3401)],
+                ),
+                VppRoutePath(
+                    self.pg3.remote_ip4,
+                    self.pg3.sw_if_index,
+                    labels=[VppMplsLabel(3402)],
+                ),
+                VppRoutePath(
+                    "0.0.0.0",
+                    self.pg1.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                ),
+            ],
+            is_multicast=1,
+        )
         route_3400_eos.add_vpp_config()
 
         #
@@ -1353,10 +1595,9 @@ class TestMPLS(VppTestCase):
         # PG0 is in the default table
         #
         self.vapi.cli("clear trace")
-        tx = self.create_stream_labelled_ip4(self.pg0,
-                                             [VppMplsLabel(3400, ttl=64)],
-                                             n=257,
-                                             dst_ip="10.0.0.1")
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(3400, ttl=64)], n=257, dst_ip="10.0.0.1"
+        )
         self.pg0.add_stream(tx)
 
         self.pg_enable_capture(self.pg_interfaces)
@@ -1366,14 +1607,12 @@ class TestMPLS(VppTestCase):
         self.verify_capture_ip4(self.pg1, rx, tx)
 
         rx = self.pg2.get_capture(257)
-        self.verify_capture_labelled(self.pg2, rx, tx,
-                                     [VppMplsLabel(3401, ttl=63)])
+        self.verify_capture_labelled(self.pg2, rx, tx, [VppMplsLabel(3401, ttl=63)])
         rx = self.pg3.get_capture(257)
-        self.verify_capture_labelled(self.pg3, rx, tx,
-                                     [VppMplsLabel(3402, ttl=63)])
+        self.verify_capture_labelled(self.pg3, rx, tx, [VppMplsLabel(3402, ttl=63)])
 
     def test_mcast_head(self):
-        """ MPLS Multicast Head-end """
+        """MPLS Multicast Head-end"""
 
         MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
         MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
@@ -1383,22 +1622,25 @@ class TestMPLS(VppTestCase):
         #
         mpls_tun = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg2.remote_ip4,
-                          self.pg2.sw_if_index,
-                          labels=[VppMplsLabel(42)]),
-             VppRoutePath(self.pg3.remote_ip4,
-                          self.pg3.sw_if_index,
-                          labels=[VppMplsLabel(43)])],
-            is_multicast=1)
+            [
+                VppRoutePath(
+                    self.pg2.remote_ip4, self.pg2.sw_if_index, labels=[VppMplsLabel(42)]
+                ),
+                VppRoutePath(
+                    self.pg3.remote_ip4, self.pg3.sw_if_index, labels=[VppMplsLabel(43)]
+                ),
+            ],
+            is_multicast=1,
+        )
         mpls_tun.add_vpp_config()
         mpls_tun.admin_up()
 
         #
         # add an unlabelled route through the new tunnel
         #
-        route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32,
-                                    [VppRoutePath("0.0.0.0",
-                                                  mpls_tun._sw_if_index)])
+        route_10_0_0_3 = VppIpRoute(
+            self, "10.0.0.3", 32, [VppRoutePath("0.0.0.0", mpls_tun._sw_if_index)]
+        )
         route_10_0_0_3.add_vpp_config()
 
         self.vapi.cli("clear trace")
@@ -1421,12 +1663,18 @@ class TestMPLS(VppTestCase):
         route_232_1_1_1 = VppIpMRoute(
             self,
             "0.0.0.0",
-            "232.1.1.1", 32,
+            "232.1.1.1",
+            32,
             MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
-            [VppMRoutePath(self.pg0.sw_if_index,
-                           MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT),
-             VppMRoutePath(mpls_tun._sw_if_index,
-                           MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+            [
+                VppMRoutePath(
+                    self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT
+                ),
+                VppMRoutePath(
+                    mpls_tun._sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD
+                ),
+            ],
+        )
         route_232_1_1_1.add_vpp_config()
         self.logger.info(self.vapi.cli("sh ip mfib index 0"))
 
@@ -1443,7 +1691,7 @@ class TestMPLS(VppTestCase):
         self.verify_capture_tunneled_ip4(self.pg0, rx, tx, [VppMplsLabel(43)])
 
     def test_mcast_ip4_tail(self):
-        """ MPLS IPv4 Multicast Tail """
+        """MPLS IPv4 Multicast Tail"""
 
         MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
         MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
@@ -1455,11 +1703,16 @@ class TestMPLS(VppTestCase):
         route_232_1_1_1 = VppIpMRoute(
             self,
             "0.0.0.0",
-            "232.1.1.1", 32,
+            "232.1.1.1",
+            32,
             MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
             table_id=1,
-            paths=[VppMRoutePath(self.pg1.sw_if_index,
-                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD)])
+            paths=[
+                VppMRoutePath(
+                    self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD
+                )
+            ],
+        )
         route_232_1_1_1.add_vpp_config()
 
         #
@@ -1471,13 +1724,13 @@ class TestMPLS(VppTestCase):
         # table 1
         #
         route_34_eos = VppMplsRoute(
-            self, 34, 1,
-            [VppRoutePath("0.0.0.0",
-                          0xffffffff,
-                          nh_table_id=1,
-                          rpf_id=55)],
+            self,
+            34,
+            1,
+            [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=1, rpf_id=55)],
             is_multicast=1,
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP4)
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP4,
+        )
 
         route_34_eos.add_vpp_config()
 
@@ -1485,8 +1738,9 @@ class TestMPLS(VppTestCase):
         # Drop due to interface lookup miss
         #
         self.vapi.cli("clear trace")
-        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="232.1.1.1", n=1)
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], dst_ip="232.1.1.1", n=1
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "RPF-ID drop none")
 
         #
@@ -1495,29 +1749,31 @@ class TestMPLS(VppTestCase):
         route_232_1_1_1.update_rpf_id(55)
         self.logger.info(self.vapi.cli("sh ip mfib index 1 232.1.1.1"))
 
-        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="232.1.1.1")
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], dst_ip="232.1.1.1"
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip4(self.pg1, rx, tx)
 
         #
         # disposed packets have an invalid IPv4 checksum
         #
-        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="232.1.1.1", n=65,
-                                             chksum=1)
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], dst_ip="232.1.1.1", n=65, chksum=1
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "Invalid Checksum")
 
         #
         # set the RPF-ID of the entry to not match the input packet's
         #
         route_232_1_1_1.update_rpf_id(56)
-        tx = self.create_stream_labelled_ip4(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="232.1.1.1")
+        tx = self.create_stream_labelled_ip4(
+            self.pg0, [VppMplsLabel(34)], dst_ip="232.1.1.1"
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "RPF-ID drop 56")
 
     def test_mcast_ip6_tail(self):
-        """ MPLS IPv6 Multicast Tail """
+        """MPLS IPv6 Multicast Tail"""
 
         MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t
         MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t
@@ -1529,12 +1785,18 @@ class TestMPLS(VppTestCase):
         route_ff = VppIpMRoute(
             self,
             "::",
-            "ff01::1", 32,
+            "ff01::1",
+            32,
             MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE,
             table_id=1,
-            paths=[VppMRoutePath(self.pg1.sw_if_index,
-                                 MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
-                                 proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)])
+            paths=[
+                VppMRoutePath(
+                    self.pg1.sw_if_index,
+                    MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD,
+                    proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+                )
+            ],
+        )
         route_ff.add_vpp_config()
 
         #
@@ -1546,21 +1808,22 @@ class TestMPLS(VppTestCase):
         # table 1
         #
         route_34_eos = VppMplsRoute(
-            self, 34, 1,
-            [VppRoutePath("::",
-                          0xffffffff,
-                          nh_table_id=1,
-                          rpf_id=55)],
+            self,
+            34,
+            1,
+            [VppRoutePath("::", 0xFFFFFFFF, nh_table_id=1, rpf_id=55)],
             is_multicast=1,
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_IP6,
+        )
 
         route_34_eos.add_vpp_config()
 
         #
         # Drop due to interface lookup miss
         #
-        tx = self.create_stream_labelled_ip6(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="ff01::1")
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(34)], dst_ip="ff01::1"
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "RPF Miss")
 
         #
@@ -1568,18 +1831,18 @@ class TestMPLS(VppTestCase):
         #
         route_ff.update_rpf_id(55)
 
-        tx = self.create_stream_labelled_ip6(self.pg0, [VppMplsLabel(34)],
-                                             dst_ip="ff01::1")
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(34)], dst_ip="ff01::1"
+        )
         rx = self.send_and_expect(self.pg0, tx, self.pg1)
         self.verify_capture_ip6(self.pg1, rx, tx)
 
         #
         # disposed packets have hop-limit = 1
         #
-        tx = self.create_stream_labelled_ip6(self.pg0,
-                                             [VppMplsLabel(34)],
-                                             dst_ip="ff01::1",
-                                             hlim=1)
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(34)], dst_ip="ff01::1", hlim=1
+        )
         rx = self.send_and_expect_some(self.pg0, tx, self.pg0)
         self.verify_capture_ip6_icmp(self.pg0, rx, tx)
 
@@ -1587,21 +1850,27 @@ class TestMPLS(VppTestCase):
         # set the RPF-ID of the entry to not match the input packet's
         #
         route_ff.update_rpf_id(56)
-        tx = self.create_stream_labelled_ip6(self.pg0,
-                                             [VppMplsLabel(34)],
-                                             dst_ip="ff01::1")
+        tx = self.create_stream_labelled_ip6(
+            self.pg0, [VppMplsLabel(34)], dst_ip="ff01::1"
+        )
         self.send_and_assert_no_replies(self.pg0, tx, "RPF-ID drop 56")
 
     def test_6pe(self):
-        """ MPLS 6PE """
+        """MPLS 6PE"""
 
         #
         # Add a non-recursive route with a single out label
         #
-        route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[VppMplsLabel(45)])])
+        route_10_0_0_1 = VppIpRoute(
+            self,
+            "10.0.0.1",
+            32,
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(45)]
+                )
+            ],
+        )
         route_10_0_0_1.add_vpp_config()
 
         # bind a local label to the route
@@ -1612,55 +1881,57 @@ class TestMPLS(VppTestCase):
         # a labelled v6 route that resolves through the v4
         #
         route_2001_3 = VppIpRoute(
-            self, "2001::3", 128,
-            [VppRoutePath("10.0.0.1",
-                          INVALID_INDEX,
-                          labels=[VppMplsLabel(32)])])
+            self,
+            "2001::3",
+            128,
+            [VppRoutePath("10.0.0.1", INVALID_INDEX, labels=[VppMplsLabel(32)])],
+        )
         route_2001_3.add_vpp_config()
 
         tx = self.create_stream_ip6(self.pg0, "2001::3")
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
 
-        self.verify_capture_labelled_ip6(self.pg0, rx, tx,
-                                         [VppMplsLabel(45),
-                                          VppMplsLabel(32)])
+        self.verify_capture_labelled_ip6(
+            self.pg0, rx, tx, [VppMplsLabel(45), VppMplsLabel(32)]
+        )
 
         #
         # and a v4 recursive via the v6
         #
         route_20_3 = VppIpRoute(
-            self, "20.0.0.3", 32,
-            [VppRoutePath("2001::3",
-                          INVALID_INDEX,
-                          labels=[VppMplsLabel(99)])])
+            self,
+            "20.0.0.3",
+            32,
+            [VppRoutePath("2001::3", INVALID_INDEX, labels=[VppMplsLabel(99)])],
+        )
         route_20_3.add_vpp_config()
 
         tx = self.create_stream_ip4(self.pg0, "20.0.0.3")
         rx = self.send_and_expect(self.pg0, tx, self.pg0)
 
-        self.verify_capture_labelled_ip4(self.pg0, rx, tx,
-                                         [VppMplsLabel(45),
-                                          VppMplsLabel(32),
-                                          VppMplsLabel(99)])
+        self.verify_capture_labelled_ip4(
+            self.pg0, rx, tx, [VppMplsLabel(45), VppMplsLabel(32), VppMplsLabel(99)]
+        )
 
     def test_attached(self):
-        """ Attach Routes with Local Label """
+        """Attach Routes with Local Label"""
 
         #
         # test that if a local label is associated with an attached/connected
         # prefix, that we can reach hosts in the prefix.
         #
-        binding = VppMplsIpBind(self, 44,
-                                self.pg0._local_ip4_subnet,
-                                self.pg0.local_ip4_prefix_len)
+        binding = VppMplsIpBind(
+            self, 44, self.pg0._local_ip4_subnet, self.pg0.local_ip4_prefix_len
+        )
         binding.add_vpp_config()
 
-        tx = (Ether(src=self.pg1.remote_mac,
-                    dst=self.pg1.local_mac) /
-              MPLS(label=44, ttl=64) /
-              IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
-              UDP(sport=1234, dport=1234) /
-              Raw(b'\xa5' * 100))
+        tx = (
+            Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
+            / MPLS(label=44, ttl=64)
+            / IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4)
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
         rxs = self.send_and_expect(self.pg0, [tx], self.pg0)
         for rx in rxs:
             # if there's an ARP then the label is linked to the glean
@@ -1672,7 +1943,7 @@ class TestMPLS(VppTestCase):
 
 
 class TestMPLSDisabled(VppTestCase):
-    """ MPLS disabled """
+    """MPLS disabled"""
 
     @classmethod
     def setUpClass(cls):
@@ -1709,26 +1980,29 @@ class TestMPLSDisabled(VppTestCase):
         super(TestMPLSDisabled, self).tearDown()
 
     def test_mpls_disabled(self):
-        """ MPLS Disabled """
+        """MPLS Disabled"""
 
         self.logger.info(self.vapi.cli("show mpls interface"))
         self.logger.info(self.vapi.cli("show mpls interface pg1"))
         self.logger.info(self.vapi.cli("show mpls interface pg0"))
 
-        tx = (Ether(src=self.pg1.remote_mac,
-                    dst=self.pg1.local_mac) /
-              MPLS(label=32, ttl=64) /
-              IPv6(src="2001::1", dst=self.pg0.remote_ip6) /
-              UDP(sport=1234, dport=1234) /
-              Raw(b'\xa5' * 100))
+        tx = (
+            Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
+            / MPLS(label=32, ttl=64)
+            / IPv6(src="2001::1", dst=self.pg0.remote_ip6)
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
 
         #
         # A simple MPLS xconnect - eos label in label out
         #
-        route_32_eos = VppMplsRoute(self, 32, 1,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[33])])
+        route_32_eos = VppMplsRoute(
+            self,
+            32,
+            1,
+            [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[33])],
+        )
         route_32_eos.add_vpp_config()
 
         #
@@ -1766,7 +2040,7 @@ class TestMPLSDisabled(VppTestCase):
 
 
 class TestMPLSPIC(VppTestCase):
-    """ MPLS Prefix-Independent Convergence (PIC) edge convergence """
+    """MPLS Prefix-Independent Convergence (PIC) edge convergence"""
 
     @classmethod
     def setUpClass(cls):
@@ -1829,7 +2103,7 @@ class TestMPLSPIC(VppTestCase):
         super(TestMPLSPIC, self).tearDown()
 
     def test_mpls_ibgp_pic(self):
-        """ MPLS iBGP Prefix-Independent Convergence (PIC) edge convergence
+        """MPLS iBGP Prefix-Independent Convergence (PIC) edge convergence
 
         1) setup many iBGP VPN routes via a pair of iBGP peers.
         2) Check EMCP forwarding to these peers
@@ -1840,16 +2114,20 @@ class TestMPLSPIC(VppTestCase):
         #
         # IGP+LDP core routes
         #
-        core_10_0_0_45 = VppIpRoute(self, "10.0.0.45", 32,
-                                    [VppRoutePath(self.pg0.remote_ip4,
-                                                  self.pg0.sw_if_index,
-                                                  labels=[45])])
+        core_10_0_0_45 = VppIpRoute(
+            self,
+            "10.0.0.45",
+            32,
+            [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[45])],
+        )
         core_10_0_0_45.add_vpp_config()
 
-        core_10_0_0_46 = VppIpRoute(self, "10.0.0.46", 32,
-                                    [VppRoutePath(self.pg1.remote_ip4,
-                                                  self.pg1.sw_if_index,
-                                                  labels=[46])])
+        core_10_0_0_46 = VppIpRoute(
+            self,
+            "10.0.0.46",
+            32,
+            [VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index, labels=[46])],
+        )
         core_10_0_0_46.add_vpp_config()
 
         #
@@ -1860,26 +2138,36 @@ class TestMPLSPIC(VppTestCase):
         pkts = []
         for ii in range(NUM_PKTS):
             dst = "192.168.1.%d" % ii
-            vpn_routes.append(VppIpRoute(
-                self, dst, 32,
-                [VppRoutePath(
-                    "10.0.0.45",
-                    0xffffffff,
-                    labels=[145],
-                    flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_HOST),
-                 VppRoutePath(
-                     "10.0.0.46",
-                     0xffffffff,
-                     labels=[146],
-                     flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_HOST)],
-                table_id=1))
+            vpn_routes.append(
+                VppIpRoute(
+                    self,
+                    dst,
+                    32,
+                    [
+                        VppRoutePath(
+                            "10.0.0.45",
+                            0xFFFFFFFF,
+                            labels=[145],
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_HOST,
+                        ),
+                        VppRoutePath(
+                            "10.0.0.46",
+                            0xFFFFFFFF,
+                            labels=[146],
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_HOST,
+                        ),
+                    ],
+                    table_id=1,
+                )
+            )
             vpn_routes[ii].add_vpp_config()
 
-            pkts.append(Ether(dst=self.pg2.local_mac,
-                              src=self.pg2.remote_mac) /
-                        IP(src=self.pg2.remote_ip4, dst=dst) /
-                        UDP(sport=1234, dport=1234) /
-                        Raw(b'\xa5' * 100))
+            pkts.append(
+                Ether(dst=self.pg2.local_mac, src=self.pg2.remote_mac)
+                / IP(src=self.pg2.remote_ip4, dst=dst)
+                / UDP(sport=1234, dport=1234)
+                / Raw(b"\xa5" * 100)
+            )
 
         #
         # Send the packet stream (one pkt to each VPN route)
@@ -1896,9 +2184,12 @@ class TestMPLSPIC(VppTestCase):
         # with the split ratio, just as long as neither is 0
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
         #
         # use a test CLI command to stop the FIB walk process, this
@@ -1921,9 +2212,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg0.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # enable the FIB walk process to converge the FIB
@@ -1938,9 +2232,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg0.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # Add the IGP route back and we return to load-balancing
@@ -1955,12 +2252,15 @@ class TestMPLSPIC(VppTestCase):
         rx1 = self.pg1._get_capture(NUM_PKTS)
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
     def test_mpls_ebgp_pic(self):
-        """ MPLS eBGP Prefix-Independent Convergence (PIC) edge convergence
+        """MPLS eBGP Prefix-Independent Convergence (PIC) edge convergence
 
         1) setup many eBGP VPN routes via a pair of eBGP peers.
         2) Check EMCP forwarding to these peers
@@ -1977,31 +2277,42 @@ class TestMPLSPIC(VppTestCase):
         for ii in range(NUM_PKTS):
             dst = "192.168.1.%d" % ii
             local_label = 1600 + ii
-            vpn_routes.append(VppIpRoute(
-                self, dst, 32,
-                [VppRoutePath(
-                    self.pg2.remote_ip4,
-                    0xffffffff,
-                    nh_table_id=1,
-                    flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED),
-                 VppRoutePath(
-                     self.pg3.remote_ip4,
-                     0xffffffff,
-                     nh_table_id=1,
-                     flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED)],
-                table_id=1))
+            vpn_routes.append(
+                VppIpRoute(
+                    self,
+                    dst,
+                    32,
+                    [
+                        VppRoutePath(
+                            self.pg2.remote_ip4,
+                            0xFFFFFFFF,
+                            nh_table_id=1,
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED,
+                        ),
+                        VppRoutePath(
+                            self.pg3.remote_ip4,
+                            0xFFFFFFFF,
+                            nh_table_id=1,
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED,
+                        ),
+                    ],
+                    table_id=1,
+                )
+            )
             vpn_routes[ii].add_vpp_config()
 
-            vpn_bindings.append(VppMplsIpBind(self, local_label, dst, 32,
-                                              ip_table_id=1))
+            vpn_bindings.append(
+                VppMplsIpBind(self, local_label, dst, 32, ip_table_id=1)
+            )
             vpn_bindings[ii].add_vpp_config()
 
-            pkts.append(Ether(dst=self.pg0.local_mac,
-                              src=self.pg0.remote_mac) /
-                        MPLS(label=local_label, ttl=64) /
-                        IP(src=self.pg0.remote_ip4, dst=dst) /
-                        UDP(sport=1234, dport=1234) /
-                        Raw(b'\xa5' * 100))
+            pkts.append(
+                Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
+                / MPLS(label=local_label, ttl=64)
+                / IP(src=self.pg0.remote_ip4, dst=dst)
+                / UDP(sport=1234, dport=1234)
+                / Raw(b"\xa5" * 100)
+            )
 
         #
         # Send the packet stream (one pkt to each VPN route)
@@ -2018,9 +2329,12 @@ class TestMPLSPIC(VppTestCase):
         # with the split ratio, just as long as neither is 0
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
         #
         # use a test CLI command to stop the FIB walk process, this
@@ -2042,9 +2356,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg3.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # enable the FIB walk process to converge the FIB
@@ -2059,9 +2376,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg3.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # put the connected routes back
@@ -2077,12 +2397,15 @@ class TestMPLSPIC(VppTestCase):
         rx1 = self.pg3._get_capture(NUM_PKTS)
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
     def test_mpls_v6_ebgp_pic(self):
-        """ MPLSv6 eBGP Prefix-Independent Convergence (PIC) edge convergence
+        """MPLSv6 eBGP Prefix-Independent Convergence (PIC) edge convergence
 
         1) setup many eBGP VPNv6 routes via a pair of eBGP peers
         2) Check EMCP forwarding to these peers
@@ -2099,31 +2422,42 @@ class TestMPLSPIC(VppTestCase):
         for ii in range(NUM_PKTS):
             dst = "3000::%d" % ii
             local_label = 1600 + ii
-            vpn_routes.append(VppIpRoute(
-                self, dst, 128,
-                [VppRoutePath(
-                    self.pg2.remote_ip6,
-                    0xffffffff,
-                    nh_table_id=1,
-                    flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED),
-                 VppRoutePath(
-                     self.pg3.remote_ip6,
-                     0xffffffff,
-                     nh_table_id=1,
-                     flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED)],
-                table_id=1))
+            vpn_routes.append(
+                VppIpRoute(
+                    self,
+                    dst,
+                    128,
+                    [
+                        VppRoutePath(
+                            self.pg2.remote_ip6,
+                            0xFFFFFFFF,
+                            nh_table_id=1,
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED,
+                        ),
+                        VppRoutePath(
+                            self.pg3.remote_ip6,
+                            0xFFFFFFFF,
+                            nh_table_id=1,
+                            flags=FibPathFlags.FIB_PATH_FLAG_RESOLVE_VIA_ATTACHED,
+                        ),
+                    ],
+                    table_id=1,
+                )
+            )
             vpn_routes[ii].add_vpp_config()
 
-            vpn_bindings.append(VppMplsIpBind(self, local_label, dst, 128,
-                                              ip_table_id=1))
+            vpn_bindings.append(
+                VppMplsIpBind(self, local_label, dst, 128, ip_table_id=1)
+            )
             vpn_bindings[ii].add_vpp_config()
 
-            pkts.append(Ether(dst=self.pg0.local_mac,
-                              src=self.pg0.remote_mac) /
-                        MPLS(label=local_label, ttl=64) /
-                        IPv6(src=self.pg0.remote_ip6, dst=dst) /
-                        UDP(sport=1234, dport=1234) /
-                        Raw(b'\xa5' * 100))
+            pkts.append(
+                Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
+                / MPLS(label=local_label, ttl=64)
+                / IPv6(src=self.pg0.remote_ip6, dst=dst)
+                / UDP(sport=1234, dport=1234)
+                / Raw(b"\xa5" * 100)
+            )
             self.logger.info(self.vapi.cli("sh ip6 fib %s" % dst))
 
         self.pg0.add_stream(pkts)
@@ -2134,9 +2468,12 @@ class TestMPLSPIC(VppTestCase):
         rx1 = self.pg3._get_capture(NUM_PKTS)
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
         #
         # use a test CLI command to stop the FIB walk process, this
@@ -2160,9 +2497,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg3.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # enable the FIB walk process to converge the FIB
@@ -2173,9 +2513,12 @@ class TestMPLSPIC(VppTestCase):
         self.pg_start()
 
         rx0 = self.pg3.get_capture(NUM_PKTS)
-        self.assertEqual(len(pkts), len(rx0),
-                         "Expected all (%s) packets across single path. "
-                         "rx0: %s." % (len(pkts), len(rx0)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0),
+            "Expected all (%s) packets across single path. "
+            "rx0: %s." % (len(pkts), len(rx0)),
+        )
 
         #
         # put the connected routes back
@@ -2193,13 +2536,16 @@ class TestMPLSPIC(VppTestCase):
         rx1 = self.pg3._get_capture(NUM_PKTS)
         self.assertNotEqual(0, len(rx0))
         self.assertNotEqual(0, len(rx1))
-        self.assertEqual(len(pkts), len(rx0) + len(rx1),
-                         "Expected all (%s) packets across both ECMP paths. "
-                         "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)))
+        self.assertEqual(
+            len(pkts),
+            len(rx0) + len(rx1),
+            "Expected all (%s) packets across both ECMP paths. "
+            "rx0: %s rx1: %s." % (len(pkts), len(rx0), len(rx1)),
+        )
 
 
 class TestMPLSL2(VppTestCase):
-    """ MPLS-L2 """
+    """MPLS-L2"""
 
     @classmethod
     def setUpClass(cls):
@@ -2274,7 +2620,7 @@ class TestMPLSL2(VppTestCase):
         self.assertEqual(arp.pdst, dip)
 
     def test_vpws(self):
-        """ Virtual Private Wire Service """
+        """Virtual Private Wire Service"""
 
         #
         # Create an MPLS tunnel that pushes 1 label
@@ -2283,10 +2629,15 @@ class TestMPLSL2(VppTestCase):
         #
         mpls_tun_1 = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(42, MplsLspMode.UNIFORM)])],
-            is_l2=1)
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4,
+                    self.pg0.sw_if_index,
+                    labels=[VppMplsLabel(42, MplsLspMode.UNIFORM)],
+                )
+            ],
+            is_l2=1,
+        )
         mpls_tun_1.add_vpp_config()
         mpls_tun_1.admin_up()
 
@@ -2294,35 +2645,42 @@ class TestMPLSL2(VppTestCase):
         # Create a label entry to for 55 that does L2 input to the tunnel
         #
         route_55_eos = VppMplsRoute(
-            self, 55, 1,
-            [VppRoutePath("0.0.0.0",
-                          mpls_tun_1.sw_if_index,
-                          type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
-                          proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)
+            self,
+            55,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    mpls_tun_1.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                    proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+                )
+            ],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+        )
         route_55_eos.add_vpp_config()
 
         #
         # Cross-connect the tunnel with one of the customers L2 interfaces
         #
-        self.vapi.sw_interface_set_l2_xconnect(self.pg1.sw_if_index,
-                                               mpls_tun_1.sw_if_index,
-                                               enable=1)
-        self.vapi.sw_interface_set_l2_xconnect(mpls_tun_1.sw_if_index,
-                                               self.pg1.sw_if_index,
-                                               enable=1)
+        self.vapi.sw_interface_set_l2_xconnect(
+            self.pg1.sw_if_index, mpls_tun_1.sw_if_index, enable=1
+        )
+        self.vapi.sw_interface_set_l2_xconnect(
+            mpls_tun_1.sw_if_index, self.pg1.sw_if_index, enable=1
+        )
 
         #
         # inject a packet from the core
         #
-        pcore = (Ether(dst=self.pg0.local_mac,
-                       src=self.pg0.remote_mac) /
-                 MPLS(label=55, ttl=64) /
-                 Ether(dst="00:00:de:ad:ba:be",
-                       src="00:00:de:ad:be:ef") /
-                 IP(src="10.10.10.10", dst="11.11.11.11") /
-                 UDP(sport=1234, dport=1234) /
-                 Raw(b'\xa5' * 100))
+        pcore = (
+            Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
+            / MPLS(label=55, ttl=64)
+            / Ether(dst="00:00:de:ad:ba:be", src="00:00:de:ad:be:ef")
+            / IP(src="10.10.10.10", dst="11.11.11.11")
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
 
         tx0 = pcore * NUM_PKTS
         rx0 = self.send_and_expect(self.pg0, tx0, self.pg1)
@@ -2339,10 +2697,9 @@ class TestMPLSL2(VppTestCase):
         tx1 = pcore[MPLS].payload
         rx1 = self.send_and_expect(self.pg1, [tx1], self.pg0)
 
-        self.verify_arp_req(rx1[0],
-                            self.pg0.local_mac,
-                            self.pg0.local_ip4,
-                            self.pg0.remote_ip4)
+        self.verify_arp_req(
+            rx1[0], self.pg0.local_mac, self.pg0.local_ip4, self.pg0.remote_ip4
+        )
 
         #
         # resolve the ARP entries and send again
@@ -2354,7 +2711,7 @@ class TestMPLSL2(VppTestCase):
         self.verify_capture_tunneled_ethernet(rx1, tx1, [VppMplsLabel(42)])
 
     def test_vpls(self):
-        """ Virtual Private LAN Service """
+        """Virtual Private LAN Service"""
 
         # we skipped this in the setup
         self.pg0.resolve_arp()
@@ -2364,19 +2721,25 @@ class TestMPLSL2(VppTestCase):
         #
         mpls_tun1 = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(42)])],
-            is_l2=1)
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(42)]
+                )
+            ],
+            is_l2=1,
+        )
         mpls_tun1.add_vpp_config()
         mpls_tun1.admin_up()
 
         mpls_tun2 = VppMPLSTunnelInterface(
             self,
-            [VppRoutePath(self.pg0.remote_ip4,
-                          self.pg0.sw_if_index,
-                          labels=[VppMplsLabel(43)])],
-            is_l2=1)
+            [
+                VppRoutePath(
+                    self.pg0.remote_ip4, self.pg0.sw_if_index, labels=[VppMplsLabel(43)]
+                )
+            ],
+            is_l2=1,
+        )
         mpls_tun2.add_vpp_config()
         mpls_tun2.admin_up()
 
@@ -2385,21 +2748,35 @@ class TestMPLSL2(VppTestCase):
         # the latter includes a Psuedo Wire Control Word
         #
         route_55_eos = VppMplsRoute(
-            self, 55, 1,
-            [VppRoutePath("0.0.0.0",
-                          mpls_tun1.sw_if_index,
-                          type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
-                          proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)
+            self,
+            55,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    mpls_tun1.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                    proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+                )
+            ],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+        )
 
         route_56_eos = VppMplsRoute(
-            self, 56, 1,
-            [VppRoutePath("0.0.0.0",
-                          mpls_tun2.sw_if_index,
-                          type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
-                          flags=FibPathFlags.FIB_PATH_FLAG_POP_PW_CW,
-                          proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)],
-            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET)
+            self,
+            56,
+            1,
+            [
+                VppRoutePath(
+                    "0.0.0.0",
+                    mpls_tun2.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                    flags=FibPathFlags.FIB_PATH_FLAG_POP_PW_CW,
+                    proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+                )
+            ],
+            eos_proto=FibPathProto.FIB_PATH_NH_PROTO_ETHERNET,
+        )
 
         # move me
         route_56_eos.add_vpp_config()
@@ -2411,43 +2788,48 @@ class TestMPLSL2(VppTestCase):
         # add to tunnel to the customers bridge-domain
         #
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=mpls_tun1.sw_if_index, bd_id=1)
+            rx_sw_if_index=mpls_tun1.sw_if_index, bd_id=1
+        )
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=mpls_tun2.sw_if_index, bd_id=1)
+            rx_sw_if_index=mpls_tun2.sw_if_index, bd_id=1
+        )
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
+            rx_sw_if_index=self.pg1.sw_if_index, bd_id=1
+        )
 
         #
         # Packet from host on the customer interface to each host
         # reachable over the core, and vice-versa
         #
-        p_cust1 = (Ether(dst="00:00:de:ad:ba:b1",
-                         src="00:00:de:ad:be:ef") /
-                   IP(src="10.10.10.10", dst="11.11.11.11") /
-                   UDP(sport=1234, dport=1234) /
-                   Raw(b'\xa5' * 100))
-        p_cust2 = (Ether(dst="00:00:de:ad:ba:b2",
-                         src="00:00:de:ad:be:ef") /
-                   IP(src="10.10.10.10", dst="11.11.11.12") /
-                   UDP(sport=1234, dport=1234) /
-                   Raw(b'\xa5' * 100))
-        p_core1 = (Ether(dst=self.pg0.local_mac,
-                         src=self.pg0.remote_mac) /
-                   MPLS(label=55, ttl=64) /
-                   Ether(src="00:00:de:ad:ba:b1",
-                         dst="00:00:de:ad:be:ef") /
-                   IP(dst="10.10.10.10", src="11.11.11.11") /
-                   UDP(sport=1234, dport=1234) /
-                   Raw(b'\xa5' * 100))
-        p_core2 = (Ether(dst=self.pg0.local_mac,
-                         src=self.pg0.remote_mac) /
-                   MPLS(label=56, ttl=64) /
-                   Raw(b'\x01' * 4) /  # PW CW
-                   Ether(src="00:00:de:ad:ba:b2",
-                         dst="00:00:de:ad:be:ef") /
-                   IP(dst="10.10.10.10", src="11.11.11.12") /
-                   UDP(sport=1234, dport=1234) /
-                   Raw(b'\xa5' * 100))
+        p_cust1 = (
+            Ether(dst="00:00:de:ad:ba:b1", src="00:00:de:ad:be:ef")
+            / IP(src="10.10.10.10", dst="11.11.11.11")
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
+        p_cust2 = (
+            Ether(dst="00:00:de:ad:ba:b2", src="00:00:de:ad:be:ef")
+            / IP(src="10.10.10.10", dst="11.11.11.12")
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
+        p_core1 = (
+            Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
+            / MPLS(label=55, ttl=64)
+            / Ether(src="00:00:de:ad:ba:b1", dst="00:00:de:ad:be:ef")
+            / IP(dst="10.10.10.10", src="11.11.11.11")
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
+        p_core2 = (
+            Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
+            / MPLS(label=56, ttl=64)
+            / Raw(b"\x01" * 4)
+            / Ether(src="00:00:de:ad:ba:b2", dst="00:00:de:ad:be:ef")  # PW CW
+            / IP(dst="10.10.10.10", src="11.11.11.12")
+            / UDP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
 
         #
         # The BD is learning, so send in one of each packet to learn
@@ -2470,12 +2852,14 @@ class TestMPLSL2(VppTestCase):
         # now a stream in each direction from each host
         #
         rx = self.send_and_expect(self.pg1, p_cust1 * NUM_PKTS, self.pg0)
-        self.verify_capture_tunneled_ethernet(rx, p_cust1 * NUM_PKTS,
-                                              [VppMplsLabel(42)])
+        self.verify_capture_tunneled_ethernet(
+            rx, p_cust1 * NUM_PKTS, [VppMplsLabel(42)]
+        )
 
         rx = self.send_and_expect(self.pg1, p_cust2 * NUM_PKTS, self.pg0)
-        self.verify_capture_tunneled_ethernet(rx, p_cust2 * NUM_PKTS,
-                                              [VppMplsLabel(43)])
+        self.verify_capture_tunneled_ethernet(
+            rx, p_cust2 * NUM_PKTS, [VppMplsLabel(43)]
+        )
 
         rx = self.send_and_expect(self.pg0, p_core1 * NUM_PKTS, self.pg1)
         rx = self.send_and_expect(self.pg0, p_core2 * NUM_PKTS, self.pg1)
@@ -2484,12 +2868,15 @@ class TestMPLSL2(VppTestCase):
         # remove interfaces from customers bridge-domain
         #
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=mpls_tun1.sw_if_index, bd_id=1, enable=0)
+            rx_sw_if_index=mpls_tun1.sw_if_index, bd_id=1, enable=0
+        )
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=mpls_tun2.sw_if_index, bd_id=1, enable=0)
+            rx_sw_if_index=mpls_tun2.sw_if_index, bd_id=1, enable=0
+        )
         self.vapi.sw_interface_set_l2_bridge(
-            rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
+            rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0
+        )
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main(testRunner=VppTestRunner)