tests/topotests/bgp_local_as_private_remove/test_bgp_local_as_private_remove.py

   1 #!/usr/bin/env python
   2 # SPDX-License-Identifier: ISC
   3
   4 #
   5 # bgp_local_as_private_remove.py
   6 # Part of NetDEF Topology Tests
   7 #
   8 # Copyright (c) 2019 by
   9 # Network Device Education Foundation, Inc. ("NetDEF")
  10 #
  11
  12 """
  13 bgp_local_as_private_remove.py:
  14 Test if primary AS number is not removed in cases when `local-as`
  15 used together with `remove-private-AS`.
  16 """
  17
  18 import os
  19 import sys
  20 import json
  21 import pytest
  22 import functools
  23
  24 CWD = os.path.dirname(os.path.realpath(__file__))
  25 sys.path.append(os.path.join(CWD, "../"))
  26
  27 # pylint: disable=C0413
  28 from lib import topotest
  29 from lib.topogen import Topogen, TopoRouter, get_topogen
  30
  31 pytestmark = [pytest.mark.bgpd]
  32
  33
  34 def build_topo(tgen):
  35     for routern in range(1, 5):
  36         tgen.add_router("r{}".format(routern))
  37
  38     switch = tgen.add_switch("s1")
  39     switch.add_link(tgen.gears["r1"])
  40     switch.add_link(tgen.gears["r2"])
  41
  42     switch = tgen.add_switch("s2")
  43     switch.add_link(tgen.gears["r3"])
  44     switch.add_link(tgen.gears["r4"])
  45
  46
  47 def setup_module(mod):
  48     tgen = Topogen(build_topo, mod.__name__)
  49     tgen.start_topology()
  50
  51     router_list = tgen.routers()
  52
  53     for i, (rname, router) in enumerate(router_list.items(), 1):
  54         router.load_config(
  55             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  56         )
  57         router.load_config(
  58             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  59         )
  60
  61     tgen.start_router()
  62
  63
  64 def teardown_module(mod):
  65     tgen = get_topogen()
  66     tgen.stop_topology()
  67
  68
  69 def test_bgp_remove_private_as():
  70     tgen = get_topogen()
  71
  72     if tgen.routers_have_failure():
  73         pytest.skip(tgen.errors)
  74
  75     r2 = tgen.gears["r2"]
  76     r4 = tgen.gears["r4"]
  77
  78     def _bgp_converge():
  79         output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  80         expected = {
  81             "192.168.255.1": {
  82                 "bgpState": "Established",
  83             }
  84         }
  85         return topotest.json_cmp(output, expected)
  86
  87     test_func = functools.partial(_bgp_converge)
  88     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
  89     assert result is None, "Can't converge initially"
  90
  91     def _bgp_as_path(router, asn_path, asn_length):
  92         output = json.loads(router.vtysh_cmd("show ip bgp 172.16.255.254/32 json"))
  93         expected = {
  94             "paths": [
  95                 {
  96                     "aspath": {
  97                         "string": asn_path,
  98                         "length": asn_length,
  99                     }
 100                 }
 101             ]
 102         }
 103         return topotest.json_cmp(output, expected)
 104
 105     test_func = functools.partial(_bgp_as_path, r2, "500", 1)
 106     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 107     assert result is None, "Private ASNs not stripped"
 108
 109     test_func = functools.partial(_bgp_as_path, r4, "500 3000", 2)
 110     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 111     assert result is None, "Private ASNs not stripped"
 112
 113
 114 if __name__ == "__main__":
 115     args = ["-s"] + sys.argv[1:]
 116     sys.exit(pytest.main(args))