tests/topotests/bgp_local_as_private_remove/test_bgp_local_as_private_remove.py

   1 #!/usr/bin/env python
   2
   3 #
   4 # bgp_local_as_private_remove.py
   5 # Part of NetDEF Topology Tests
   6 #
   7 # Copyright (c) 2019 by
   8 # Network Device Education Foundation, Inc. ("NetDEF")
   9 #
  10 # Permission to use, copy, modify, and/or distribute this software
  11 # for any purpose with or without fee is hereby granted, provided
  12 # that the above copyright notice and this permission notice appear
  13 # in all copies.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
  16 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  17 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
  18 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
  19 # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  20 # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  21 # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  22 # OF THIS SOFTWARE.
  23 #
  24
  25 """
  26 bgp_local_as_private_remove.py:
  27 Test if primary AS number is not removed in cases when `local-as`
  28 used together with `remove-private-AS`.
  29 """
  30
  31 import os
  32 import sys
  33 import json
  34 import pytest
  35 import functools
  36
  37 CWD = os.path.dirname(os.path.realpath(__file__))
  38 sys.path.append(os.path.join(CWD, "../"))
  39
  40 # pylint: disable=C0413
  41 from lib import topotest
  42 from lib.topogen import Topogen, TopoRouter, get_topogen
  43
  44 pytestmark = [pytest.mark.bgpd]
  45
  46
  47 def build_topo(tgen):
  48     for routern in range(1, 5):
  49         tgen.add_router("r{}".format(routern))
  50
  51     switch = tgen.add_switch("s1")
  52     switch.add_link(tgen.gears["r1"])
  53     switch.add_link(tgen.gears["r2"])
  54
  55     switch = tgen.add_switch("s2")
  56     switch.add_link(tgen.gears["r3"])
  57     switch.add_link(tgen.gears["r4"])
  58
  59
  60 def setup_module(mod):
  61     tgen = Topogen(build_topo, mod.__name__)
  62     tgen.start_topology()
  63
  64     router_list = tgen.routers()
  65
  66     for i, (rname, router) in enumerate(router_list.items(), 1):
  67         router.load_config(
  68             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  69         )
  70         router.load_config(
  71             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  72         )
  73
  74     tgen.start_router()
  75
  76
  77 def teardown_module(mod):
  78     tgen = get_topogen()
  79     tgen.stop_topology()
  80
  81
  82 def test_bgp_remove_private_as():
  83     tgen = get_topogen()
  84
  85     if tgen.routers_have_failure():
  86         pytest.skip(tgen.errors)
  87
  88     r2 = tgen.gears["r2"]
  89     r4 = tgen.gears["r4"]
  90
  91     def _bgp_converge():
  92         output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  93         expected = {
  94             "192.168.255.1": {
  95                 "bgpState": "Established",
  96             }
  97         }
  98         return topotest.json_cmp(output, expected)
  99
 100     test_func = functools.partial(_bgp_converge)
 101     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 102     assert result is None, "Can't converge initially"
 103
 104     def _bgp_as_path(router, asn_path, asn_length):
 105         output = json.loads(router.vtysh_cmd("show ip bgp 172.16.255.254/32 json"))
 106         expected = {
 107             "paths": [
 108                 {
 109                     "aspath": {
 110                         "string": asn_path,
 111                         "length": asn_length,
 112                     }
 113                 }
 114             ]
 115         }
 116         return topotest.json_cmp(output, expected)
 117
 118     test_func = functools.partial(_bgp_as_path, r2, "500", 1)
 119     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 120     assert result is None, "Private ASNs not stripped"
 121
 122     test_func = functools.partial(_bgp_as_path, r4, "500 3000", 2)
 123     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 124     assert result is None, "Private ASNs not stripped"
 125
 126
 127 if __name__ == "__main__":
 128     args = ["-s"] + sys.argv[1:]
 129     sys.exit(pytest.main(args))