tests/topotests/bgp_set_local_preference_add_subtract/test_bgp_set_local-preference_add_subtract.py

   1 #!/usr/bin/env python
   2 # SPDX-License-Identifier: ISC
   3
   4 #
   5 # bgp_set_local-preference_add_subtract.py
   6 # Part of NetDEF Topology Tests
   7 #
   8 # Copyright (c) 2020 by
   9 # Donatas Abraitis <donatas.abraitis@gmail.com>
  10 #
  11
  12 """
  13 bgp_set_local-preference_add_subtract.py:
  14 Test if we can add/subtract the value to/from an existing
  15 LOCAL_PREF in route-maps.
  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, 4):
  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     switch.add_link(tgen.gears["r3"])
  42
  43
  44 def setup_module(mod):
  45     tgen = Topogen(build_topo, mod.__name__)
  46     tgen.start_topology()
  47
  48     router_list = tgen.routers()
  49
  50     for i, (rname, router) in enumerate(router_list.items(), 1):
  51         router.load_config(
  52             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  53         )
  54         router.load_config(
  55             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  56         )
  57
  58     tgen.start_router()
  59
  60
  61 def teardown_module(mod):
  62     tgen = get_topogen()
  63     tgen.stop_topology()
  64
  65
  66 def test_bgp_set_local_preference():
  67     tgen = get_topogen()
  68
  69     if tgen.routers_have_failure():
  70         pytest.skip(tgen.errors)
  71
  72     router = tgen.gears["r1"]
  73
  74     def _bgp_converge(router):
  75         output = json.loads(router.vtysh_cmd("show ip bgp neighbor json"))
  76         expected = {
  77             "192.168.255.2": {
  78                 "bgpState": "Established",
  79                 "addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 3}},
  80             },
  81             "192.168.255.3": {
  82                 "bgpState": "Established",
  83                 "addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 3}},
  84             },
  85         }
  86         return topotest.json_cmp(output, expected)
  87
  88     def _bgp_check_local_preference(router):
  89         output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
  90         expected = {
  91             "routes": {
  92                 "10.10.10.2/32": [{"locPrf": 160}],
  93                 "10.10.10.3/32": [{"locPrf": 40}],
  94                 "172.16.255.254/32": [
  95                     {"locPrf": 50, "nexthops": [{"ip": "192.168.255.3"}]},
  96                     {"locPrf": 150, "nexthops": [{"ip": "192.168.255.2"}]},
  97                 ],
  98             }
  99         }
 100         return topotest.json_cmp(output, expected)
 101
 102     test_func = functools.partial(_bgp_converge, router)
 103     success, result = topotest.run_and_expect(test_func, None, count=15, wait=0.5)
 104
 105     assert result is None, 'Failed to see BGP convergence in "{}"'.format(router)
 106
 107     test_func = functools.partial(_bgp_check_local_preference, router)
 108     success, result = topotest.run_and_expect(test_func, None, count=15, wait=0.5)
 109
 110     assert result is None, 'Failed to see applied BGP local-preference in "{}"'.format(
 111         router
 112     )
 113
 114
 115 if __name__ == "__main__":
 116     args = ["-s"] + sys.argv[1:]
 117     sys.exit(pytest.main(args))