tests/topotests/bgp_as_wide_bgp_identifier/test_bgp_as_wide_bgp_identifier.py

   1 #!/usr/bin/env python
   2 # SPDX-License-Identifier: ISC
   3
   4 #
   5 # test_bgp_as_wide_bgp_identifier.py
   6 # Part of NetDEF Topology Tests
   7 #
   8 # Copyright (c) 2020 by
   9 # Donatas Abraitis <donatas.abraitis@gmail.com>
  10 #
  11
  12 """
  13 rfc6286: Autonomous-System-Wide Unique BGP Identifier for BGP-4
  14 Test if 'Bad BGP Identifier' notification is sent only to
  15 internal peers (autonomous-system-wide). eBGP peers are not
  16 affected and should work.
  17 """
  18
  19 import os
  20 import sys
  21 import json
  22 import pytest
  23 import functools
  24
  25 CWD = os.path.dirname(os.path.realpath(__file__))
  26 sys.path.append(os.path.join(CWD, "../"))
  27
  28 # pylint: disable=C0413
  29 from lib import topotest
  30 from lib.topogen import Topogen, TopoRouter, get_topogen
  31
  32 pytestmark = [pytest.mark.bgpd]
  33
  34
  35 def build_topo(tgen):
  36     for routern in range(1, 4):
  37         tgen.add_router("r{}".format(routern))
  38
  39     switch = tgen.add_switch("s1")
  40     switch.add_link(tgen.gears["r1"])
  41     switch.add_link(tgen.gears["r2"])
  42     switch.add_link(tgen.gears["r3"])
  43
  44
  45 def setup_module(mod):
  46     tgen = Topogen(build_topo, mod.__name__)
  47     tgen.start_topology()
  48
  49     router_list = tgen.routers()
  50
  51     for i, (rname, router) in enumerate(router_list.items(), 1):
  52         router.load_config(
  53             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  54         )
  55         router.load_config(
  56             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  57         )
  58
  59     tgen.start_router()
  60
  61
  62 def teardown_module(mod):
  63     tgen = get_topogen()
  64     tgen.stop_topology()
  65
  66
  67 def test_bgp_as_wide_bgp_identifier():
  68     tgen = get_topogen()
  69
  70     if tgen.routers_have_failure():
  71         pytest.skip(tgen.errors)
  72
  73     def _bgp_converge(router):
  74         output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  75         expected = {"192.168.255.1": {"bgpState": "Established"}}
  76         return topotest.json_cmp(output, expected)
  77
  78     def _bgp_failed(router):
  79         output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  80         expected = {
  81             "192.168.255.1": {
  82                 "lastNotificationReason": "OPEN Message Error/Bad BGP Identifier"
  83             }
  84         }
  85         return topotest.json_cmp(output, expected)
  86
  87     test_func = functools.partial(_bgp_converge, tgen.gears["r1"])
  88     success, result = topotest.run_and_expect(test_func, None, count=260, wait=0.5)
  89
  90     assert result is None, 'Failed to converge: "{}"'.format(tgen.gears["r1"])
  91
  92     test_func = functools.partial(_bgp_failed, tgen.gears["r3"])
  93     success, result = topotest.run_and_expect(test_func, None, count=260, wait=0.5)
  94
  95     assert result is None, 'Bad BGP Identifier notification not sent: "{}"'.format(
  96         tgen.gears["r3"]
  97     )
  98
  99
 100 if __name__ == "__main__":
 101     args = ["-s"] + sys.argv[1:]
 102     sys.exit(pytest.main(args))