test/test_qos.py

   1 #!/usr/bin/env python3
   2
   3 import unittest
   4
   5 from framework import VppTestCase, VppTestRunner
   6 from vpp_sub_interface import VppDot1QSubint
   7 from vpp_ip import DpoProto
   8 from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsRoute, \
   9     VppMplsLabel, VppMplsTable, FibPathProto
  10
  11 import scapy.compat
  12 from scapy.packet import Raw
  13 from scapy.layers.l2 import Ether, Dot1Q
  14 from scapy.layers.inet import IP, UDP
  15 from scapy.layers.inet6 import IPv6
  16 from scapy.contrib.mpls import MPLS
  17 from vpp_papi import VppEnum
  18 from vpp_qos import VppQosRecord, VppQosEgressMap, VppQosMark, VppQosStore
  19
  20 NUM_PKTS = 67
  21
  22
  23 class TestQOS(VppTestCase):
  24     """ QOS Test Case """
  25
  26     # Note: Since the enums aren't created dynamically until after
  27     #       the papi client attaches to VPP, we put it in a property to
  28     #       ensure it is the value at runtime, not at module load time.
  29     @property
  30     def QOS_SOURCE(self):
  31         return VppEnum.vl_api_qos_source_t
  32
  33     @classmethod
  34     def setUpClass(cls):
  35         super(TestQOS, cls).setUpClass()
  36
  37     @classmethod
  38     def tearDownClass(cls):
  39         super(TestQOS, cls).tearDownClass()
  40
  41     def setUp(self):
  42         super(TestQOS, self).setUp()
  43
  44         self.create_pg_interfaces(range(5))
  45
  46         tbl = VppMplsTable(self, 0)
  47         tbl.add_vpp_config()
  48
  49         for i in self.pg_interfaces:
  50             i.admin_up()
  51             i.config_ip4()
  52             i.resolve_arp()
  53             i.config_ip6()
  54             i.resolve_ndp()
  55             i.enable_mpls()
  56
  57     def tearDown(self):
  58         for i in self.pg_interfaces:
  59             i.unconfig_ip4()
  60             i.unconfig_ip6()
  61             i.disable_mpls()
  62
  63         super(TestQOS, self).tearDown()
  64
  65     def test_qos_ip(self):
  66         """ QoS Mark/Record/Store IP """
  67
  68         #
  69         # for table 1 map the n=0xff possible values of input QoS mark,
  70         # n to 1-n
  71         #
  72         output = [scapy.compat.chb(0)] * 256
  73         for i in range(0, 255):
  74             output[i] = scapy.compat.chb(255 - i)
  75         os = b''.join(output)
  76         rows = [{'outputs': os},
  77                 {'outputs': os},
  78                 {'outputs': os},
  79                 {'outputs': os}]
  80
  81         qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config()
  82
  83         #
  84         # For table 2 (and up) use the value n for everything
  85         #
  86         output = [scapy.compat.chb(2)] * 256
  87         os = b''.join(output)
  88         rows = [{'outputs': os},
  89                 {'outputs': os},
  90                 {'outputs': os},
  91                 {'outputs': os}]
  92
  93         qem2 = VppQosEgressMap(self, 2, rows).add_vpp_config()
  94
  95         output = [scapy.compat.chb(3)] * 256
  96         os = b''.join(output)
  97         rows = [{'outputs': os},
  98                 {'outputs': os},
  99                 {'outputs': os},
 100                 {'outputs': os}]
 101
 102         qem3 = VppQosEgressMap(self, 3, rows).add_vpp_config()
 103
 104         output = [scapy.compat.chb(4)] * 256
 105         os = b''.join(output)
 106         rows = [{'outputs': os},
 107                 {'outputs': os},
 108                 {'outputs': os},
 109                 {'outputs': os}]
 110
 111         qem4 = VppQosEgressMap(self, 4, rows).add_vpp_config()
 112         qem5 = VppQosEgressMap(self, 5, rows).add_vpp_config()
 113         qem6 = VppQosEgressMap(self, 6, rows).add_vpp_config()
 114         qem7 = VppQosEgressMap(self, 7, rows).add_vpp_config()
 115
 116         self.assertTrue(qem7.query_vpp_config())
 117         self.logger.info(self.vapi.cli("sh qos eg map"))
 118
 119         #
 120         # Bind interface pgN to table n
 121         #
 122         qm1 = VppQosMark(self, self.pg1, qem1,
 123                          self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 124         qm2 = VppQosMark(self, self.pg2, qem2,
 125                          self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 126         qm3 = VppQosMark(self, self.pg3, qem3,
 127                          self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 128         qm4 = VppQosMark(self, self.pg4, qem4,
 129                          self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 130         self.assertTrue(qm3.query_vpp_config())
 131
 132         self.logger.info(self.vapi.cli("sh qos mark"))
 133
 134         #
 135         # packets ingress on Pg0
 136         #
 137         p_v4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 138                 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, tos=1) /
 139                 UDP(sport=1234, dport=1234) /
 140                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 141         p_v6 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 142                 IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6,
 143                      tc=1) /
 144                 UDP(sport=1234, dport=1234) /
 145                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 146
 147         #
 148         # Since we have not yet enabled the recording of the input QoS
 149         # from the input iP header, the egress packet's ToS will be unchanged
 150         #
 151         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 152         for p in rx:
 153             self.assertEqual(p[IP].tos, 1)
 154         rx = self.send_and_expect(self.pg0, p_v6 * NUM_PKTS, self.pg1)
 155         for p in rx:
 156             self.assertEqual(p[IPv6].tc, 1)
 157
 158         #
 159         # Enable QoS recording on IP input for pg0
 160         #
 161         qr1 = VppQosRecord(self, self.pg0,
 162                            self.QOS_SOURCE.QOS_API_SOURCE_IP)
 163         qr1.add_vpp_config()
 164         self.logger.info(self.vapi.cli("sh qos record"))
 165
 166         #
 167         # send the same packets, this time expect the input TOS of 1
 168         # to be mapped to pg1's egress value of 254
 169         #
 170         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 171         for p in rx:
 172             self.assertEqual(p[IP].tos, 254)
 173         rx = self.send_and_expect(self.pg0, p_v6 * NUM_PKTS, self.pg1)
 174         for p in rx:
 175             self.assertEqual(p[IPv6].tc, 254)
 176
 177         #
 178         # different input ToS to test the mapping
 179         #
 180         p_v4[IP].tos = 127
 181         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 182         for p in rx:
 183             self.assertEqual(p[IP].tos, 128)
 184         p_v6[IPv6].tc = 127
 185         rx = self.send_and_expect(self.pg0, p_v6 * NUM_PKTS, self.pg1)
 186         for p in rx:
 187             self.assertEqual(p[IPv6].tc, 128)
 188
 189         p_v4[IP].tos = 254
 190         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 191         for p in rx:
 192             self.assertEqual(p[IP].tos, 1)
 193         p_v6[IPv6].tc = 254
 194         rx = self.send_and_expect(self.pg0, p_v6 * NUM_PKTS, self.pg1)
 195         for p in rx:
 196             self.assertEqual(p[IPv6].tc, 1)
 197
 198         #
 199         # send packets out the other interfaces to test the maps are
 200         # correctly applied
 201         #
 202         p_v4[IP].dst = self.pg2.remote_ip4
 203         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg2)
 204         for p in rx:
 205             self.assertEqual(p[IP].tos, 2)
 206
 207         p_v4[IP].dst = self.pg3.remote_ip4
 208         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg3)
 209         for p in rx:
 210             self.assertEqual(p[IP].tos, 3)
 211
 212         p_v6[IPv6].dst = self.pg3.remote_ip6
 213         rx = self.send_and_expect(self.pg0, p_v6 * NUM_PKTS, self.pg3)
 214         for p in rx:
 215             self.assertEqual(p[IPv6].tc, 3)
 216
 217         #
 218         # remove the map on pg2 and pg3, now expect an unchanged IP tos
 219         #
 220         qm2.remove_vpp_config()
 221         qm3.remove_vpp_config()
 222         self.logger.info(self.vapi.cli("sh qos mark"))
 223
 224         self.assertFalse(qm3.query_vpp_config())
 225         self.logger.info(self.vapi.cli("sh int feat pg2"))
 226
 227         p_v4[IP].dst = self.pg2.remote_ip4
 228         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg2)
 229         for p in rx:
 230             self.assertEqual(p[IP].tos, 254)
 231
 232         p_v4[IP].dst = self.pg3.remote_ip4
 233         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg3)
 234         for p in rx:
 235             self.assertEqual(p[IP].tos, 254)
 236
 237         #
 238         # still mapping out of pg1
 239         #
 240         p_v4[IP].dst = self.pg1.remote_ip4
 241         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 242         for p in rx:
 243             self.assertEqual(p[IP].tos, 1)
 244
 245         #
 246         # disable the input recording on pg0
 247         #
 248         self.assertTrue(qr1.query_vpp_config())
 249         qr1.remove_vpp_config()
 250
 251         #
 252         # back to an unchanged TOS value
 253         #
 254         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 255         for p in rx:
 256             self.assertEqual(p[IP].tos, 254)
 257
 258         #
 259         # enable QoS stroe instead of record
 260         #
 261         qst1 = VppQosStore(self, self.pg0,
 262                            self.QOS_SOURCE.QOS_API_SOURCE_IP,
 263                            5).add_vpp_config()
 264         self.logger.info(self.vapi.cli("sh qos store"))
 265
 266         p_v4[IP].dst = self.pg1.remote_ip4
 267         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 268         for p in rx:
 269             self.assertEqual(p[IP].tos, 250)
 270
 271         #
 272         # disable the input storing on pg0
 273         #
 274         self.assertTrue(qst1.query_vpp_config())
 275         qst1.remove_vpp_config()
 276
 277         #
 278         # back to an unchanged TOS value
 279         #
 280         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 281         for p in rx:
 282             self.assertEqual(p[IP].tos, 254)
 283
 284         #
 285         # disable the egress map on pg1 and pg4
 286         #
 287         qm1.remove_vpp_config()
 288         qm4.remove_vpp_config()
 289
 290         #
 291         # unchanged Tos on pg1
 292         #
 293         rx = self.send_and_expect(self.pg0, p_v4 * NUM_PKTS, self.pg1)
 294         for p in rx:
 295             self.assertEqual(p[IP].tos, 254)
 296
 297     def test_qos_mpls(self):
 298         """ QoS Mark/Record MPLS """
 299
 300         #
 301         # 255 QoS for all input values
 302         #
 303         from_ext = 7
 304         from_ip = 6
 305         from_mpls = 5
 306         from_vlan = 4
 307         output = [scapy.compat.chb(from_ext)] * 256
 308         os1 = b''.join(output)
 309         output = [scapy.compat.chb(from_vlan)] * 256
 310         os2 = b''.join(output)
 311         output = [scapy.compat.chb(from_mpls)] * 256
 312         os3 = b''.join(output)
 313         output = [scapy.compat.chb(from_ip)] * 256
 314         os4 = b''.join(output)
 315         rows = [{'outputs': os1},
 316                 {'outputs': os2},
 317                 {'outputs': os3},
 318                 {'outputs': os4}]
 319
 320         qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config()
 321
 322         #
 323         # a route with 1 MPLS label
 324         #
 325         route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
 326                                     [VppRoutePath(self.pg1.remote_ip4,
 327                                                   self.pg1.sw_if_index,
 328                                                   labels=[32])])
 329         route_10_0_0_1.add_vpp_config()
 330
 331         #
 332         # a route with 3 MPLS labels
 333         #
 334         route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32,
 335                                     [VppRoutePath(self.pg1.remote_ip4,
 336                                                   self.pg1.sw_if_index,
 337                                                   labels=[63, 33, 34])])
 338         route_10_0_0_3.add_vpp_config()
 339
 340         #
 341         # enable IP QoS recording on the input Pg0 and MPLS egress marking
 342         # on Pg1
 343         #
 344         qr1 = VppQosRecord(self, self.pg0,
 345                            self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 346         qm1 = VppQosMark(self, self.pg1, qem1,
 347                          self.QOS_SOURCE.QOS_API_SOURCE_MPLS).add_vpp_config()
 348
 349         #
 350         # packet that will get one label added and 3 labels added resp.
 351         #
 352         p_1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 353                IP(src=self.pg0.remote_ip4, dst="10.0.0.1", tos=1) /
 354                UDP(sport=1234, dport=1234) /
 355                Raw(scapy.compat.chb(100) * NUM_PKTS))
 356         p_3 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 357                IP(src=self.pg0.remote_ip4, dst="10.0.0.3", tos=1) /
 358                UDP(sport=1234, dport=1234) /
 359                Raw(scapy.compat.chb(100) * NUM_PKTS))
 360
 361         rx = self.send_and_expect(self.pg0, p_1 * NUM_PKTS, self.pg1)
 362
 363         #
 364         # only 3 bits of ToS value in MPLS make sure tos is correct
 365         # and the label and EOS bit have not been corrupted
 366         #
 367         for p in rx:
 368             self.assertEqual(p[MPLS].cos, from_ip)
 369             self.assertEqual(p[MPLS].label, 32)
 370             self.assertEqual(p[MPLS].s, 1)
 371         rx = self.send_and_expect(self.pg0, p_3 * NUM_PKTS, self.pg1)
 372         for p in rx:
 373             self.assertEqual(p[MPLS].cos, from_ip)
 374             self.assertEqual(p[MPLS].label, 63)
 375             self.assertEqual(p[MPLS].s, 0)
 376             h = p[MPLS].payload
 377             self.assertEqual(h[MPLS].cos, from_ip)
 378             self.assertEqual(h[MPLS].label, 33)
 379             self.assertEqual(h[MPLS].s, 0)
 380             h = h[MPLS].payload
 381             self.assertEqual(h[MPLS].cos, from_ip)
 382             self.assertEqual(h[MPLS].label, 34)
 383             self.assertEqual(h[MPLS].s, 1)
 384
 385         #
 386         # enable MPLS QoS recording on the input Pg0 and IP egress marking
 387         # on Pg1
 388         #
 389         qr2 = VppQosRecord(
 390             self, self.pg0,
 391             self.QOS_SOURCE.QOS_API_SOURCE_MPLS).add_vpp_config()
 392         qm2 = VppQosMark(
 393             self, self.pg1, qem1,
 394             self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 395
 396         #
 397         # MPLS x-connect - COS according to pg1 map
 398         #
 399         route_32_eos = VppMplsRoute(self, 32, 1,
 400                                     [VppRoutePath(self.pg1.remote_ip4,
 401                                                   self.pg1.sw_if_index,
 402                                                   labels=[VppMplsLabel(33)])])
 403         route_32_eos.add_vpp_config()
 404
 405         p_m1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 406                 MPLS(label=32, cos=3, ttl=2) /
 407                 IP(src=self.pg0.remote_ip4, dst="10.0.0.1", tos=1) /
 408                 UDP(sport=1234, dport=1234) /
 409                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 410
 411         rx = self.send_and_expect(self.pg0, p_m1 * NUM_PKTS, self.pg1)
 412         for p in rx:
 413             self.assertEqual(p[MPLS].cos, from_mpls)
 414             self.assertEqual(p[MPLS].label, 33)
 415             self.assertEqual(p[MPLS].s, 1)
 416
 417         #
 418         # MPLS deag - COS is copied from MPLS to IP
 419         #
 420         route_33_eos = VppMplsRoute(self, 33, 1,
 421                                     [VppRoutePath("0.0.0.0",
 422                                                   0xffffffff,
 423                                                   nh_table_id=0)])
 424         route_33_eos.add_vpp_config()
 425
 426         route_10_0_0_4 = VppIpRoute(self, "10.0.0.4", 32,
 427                                     [VppRoutePath(self.pg1.remote_ip4,
 428                                                   self.pg1.sw_if_index)])
 429         route_10_0_0_4.add_vpp_config()
 430
 431         p_m2 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 432                 MPLS(label=33, ttl=2, cos=3) /
 433                 IP(src=self.pg0.remote_ip4, dst="10.0.0.4", tos=1) /
 434                 UDP(sport=1234, dport=1234) /
 435                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 436
 437         rx = self.send_and_expect(self.pg0, p_m2 * NUM_PKTS, self.pg1)
 438
 439         for p in rx:
 440             self.assertEqual(p[IP].tos, from_mpls)
 441
 442     def test_qos_vlan(self):
 443         """QoS mark/record VLAN """
 444
 445         #
 446         # QoS for all input values
 447         #
 448         output = [scapy.compat.chb(0)] * 256
 449         for i in range(0, 255):
 450             output[i] = scapy.compat.chb(255 - i)
 451         os = b''.join(output)
 452         rows = [{'outputs': os},
 453                 {'outputs': os},
 454                 {'outputs': os},
 455                 {'outputs': os}]
 456
 457         qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config()
 458
 459         sub_if = VppDot1QSubint(self, self.pg0, 11)
 460
 461         sub_if.admin_up()
 462         sub_if.config_ip4()
 463         sub_if.resolve_arp()
 464         sub_if.config_ip6()
 465         sub_if.resolve_ndp()
 466
 467         #
 468         # enable VLAN QoS recording/marking on the input Pg0 subinterface and
 469         #
 470         qr_v = VppQosRecord(
 471             self, sub_if,
 472             self.QOS_SOURCE.QOS_API_SOURCE_VLAN).add_vpp_config()
 473         qm_v = VppQosMark(
 474             self, sub_if, qem1,
 475             self.QOS_SOURCE.QOS_API_SOURCE_VLAN).add_vpp_config()
 476
 477         #
 478         # IP marking/recording on pg1
 479         #
 480         qr_ip = VppQosRecord(
 481             self, self.pg1,
 482             self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 483         qm_ip = VppQosMark(
 484             self, self.pg1, qem1,
 485             self.QOS_SOURCE.QOS_API_SOURCE_IP).add_vpp_config()
 486
 487         #
 488         # a routes to/from sub-interface
 489         #
 490         route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
 491                                     [VppRoutePath(sub_if.remote_ip4,
 492                                                   sub_if.sw_if_index)])
 493         route_10_0_0_1.add_vpp_config()
 494         route_10_0_0_2 = VppIpRoute(self, "10.0.0.2", 32,
 495                                     [VppRoutePath(self.pg1.remote_ip4,
 496                                                   self.pg1.sw_if_index)])
 497         route_10_0_0_2.add_vpp_config()
 498         route_2001_1 = VppIpRoute(self, "2001::1", 128,
 499                                   [VppRoutePath(sub_if.remote_ip6,
 500                                                 sub_if.sw_if_index)])
 501         route_2001_1.add_vpp_config()
 502         route_2001_2 = VppIpRoute(self, "2001::2", 128,
 503                                   [VppRoutePath(self.pg1.remote_ip6,
 504                                                 self.pg1.sw_if_index)])
 505         route_2001_2.add_vpp_config()
 506
 507         p_v1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 508                 Dot1Q(vlan=11, prio=1) /
 509                 IP(src="1.1.1.1", dst="10.0.0.2", tos=1) /
 510                 UDP(sport=1234, dport=1234) /
 511                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 512
 513         p_v2 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
 514                 IP(src="1.1.1.1", dst="10.0.0.1", tos=1) /
 515                 UDP(sport=1234, dport=1234) /
 516                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 517
 518         p_v3 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 519                 Dot1Q(vlan=11, prio=1, id=1) /
 520                 IP(src="1.1.1.1", dst="10.0.0.2", tos=2) /
 521                 UDP(sport=1234, dport=1234) /
 522                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 523
 524         rx = self.send_and_expect(self.pg1, p_v2 * NUM_PKTS, self.pg0)
 525
 526         for p in rx:
 527             self.assertEqual(p[Dot1Q].prio, 7)
 528             self.assertEqual(p[Dot1Q].id, 0)
 529
 530         rx = self.send_and_expect(self.pg0, p_v3 * NUM_PKTS, self.pg1)
 531
 532         for p in rx:
 533             self.assertEqual(p[IP].tos, 252)
 534
 535         rx = self.send_and_expect(self.pg0, p_v1 * NUM_PKTS, self.pg1)
 536
 537         for p in rx:
 538             self.assertEqual(p[IP].tos, 253)
 539
 540         p_v1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
 541                 Dot1Q(vlan=11, prio=2) /
 542                 IPv6(src="2001::1", dst="2001::2", tc=1) /
 543                 UDP(sport=1234, dport=1234) /
 544                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 545
 546         p_v2 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
 547                 IPv6(src="3001::1", dst="2001::1", tc=1) /
 548                 UDP(sport=1234, dport=1234) /
 549                 Raw(scapy.compat.chb(100) * NUM_PKTS))
 550
 551         rx = self.send_and_expect(self.pg1, p_v2 * NUM_PKTS, self.pg0)
 552
 553         for p in rx:
 554             self.assertEqual(p[Dot1Q].prio, 7)
 555             self.assertEqual(p[Dot1Q].id, 0)
 556
 557         rx = self.send_and_expect(self.pg0, p_v1 * NUM_PKTS, self.pg1)
 558
 559         for p in rx:
 560             self.assertEqual(p[IPv6].tc, 251)
 561
 562         #
 563         # cleanup
 564         #
 565         sub_if.unconfig_ip4()
 566         sub_if.unconfig_ip6()
 567
 568
 569 if __name__ == '__main__':
 570     unittest.main(testRunner=VppTestRunner)