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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# bgp_distance_change.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2019 by
# Donatas Abraitis <donatas.abraitis@gmail.com>
#
"""
bgp_distance_change.py:
Test if works the following commands:
router bgp 65031
address-family ipv4 unicast
distance bgp 123 123 123
Changed distance should reflect to RIB after changes.
"""
import os
import sys
import json
import pytest
import functools
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
for routern in range(1, 3):
tgen.add_router("r{}".format(routern))
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for i, (rname, router) in enumerate(router_list.items(), 1):
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
)
tgen.start_router()
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_bgp_maximum_prefix_invalid():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router = tgen.gears["r1"]
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json"))
expected = {
"192.168.255.2": {
"bgpState": "Established",
"addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 2}},
}
}
return topotest.json_cmp(output, expected)
def _bgp_distance_change(router):
router.vtysh_cmd(
"""
configure terminal
router bgp 65000
address-family ipv4 unicast
distance bgp 123 123 123
"""
)
def _bgp_check_distance_change(router):
output = json.loads(router.vtysh_cmd("show ip route 172.16.255.254/32 json"))
expected = {"172.16.255.254/32": [{"protocol": "bgp", "distance": 123}]}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, router)
success, result = topotest.run_and_expect(test_func, None, count=15, wait=0.5)
assert result is None, 'Failed to see BGP convergence in "{}"'.format(router)
_bgp_distance_change(router)
test_func = functools.partial(_bgp_check_distance_change, router)
success, result = topotest.run_and_expect(test_func, None, count=15, wait=0.5)
assert result is None, 'Failed to see applied BGP distance in RIB "{}"'.format(
router
)
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
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