118 lines
2.8 KiB
Python
118 lines
2.8 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# Copyright (c) 2022 by
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# Donald Sharp
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#
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"""
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Test some bgp interface based issues that show up
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"""
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import os
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import sys
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import json
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import pytest
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import functools
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, "../"))
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# pylint: disable=C0413
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from lib import topotest
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from lib.topogen import Topogen, TopoRouter, get_topogen
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from lib.common_config import step
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pytestmark = [pytest.mark.bgpd]
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def build_topo(tgen):
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tgen.add_router("r1")
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tgen.add_router("r2")
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switch = tgen.add_switch("s1")
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switch.add_link(tgen.gears["r1"])
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switch.add_link(tgen.gears["r2"])
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def setup_module(mod):
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tgen = Topogen(build_topo, mod.__name__)
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tgen.start_topology()
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router_list = tgen.routers()
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for _, (rname, router) in enumerate(router_list.items(), 1):
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router.load_config(
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TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
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)
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router.load_config(
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TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
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)
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tgen.start_router()
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def teardown_module(mod):
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tgen = get_topogen()
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tgen.stop_topology()
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#
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# Test these events:
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# a) create an unnumbered neighbor
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# b) shutdown the interface
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# c) remove the unnumbered peer in bgp and bgp does not crash
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def test_bgp_unnumbered_removal():
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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def _bgp_nexthop_cache():
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output = tgen.gears["r1"].vtysh_cmd("show bgp nexthop")
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expected = "Current BGP nexthop cache:\n"
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return output == expected
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def _bgp_converge():
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output = json.loads(
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tgen.gears["r1"].vtysh_cmd("show ip bgp 172.16.255.254/32 json")
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)
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expected = {"prefix": "172.16.255.254/32"}
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return topotest.json_cmp(output, expected)
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step("Ensure Convergence of BGP")
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test_func = functools.partial(_bgp_converge)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assert result is None, 'Failed bgp convergence in "{}"'.format(tgen.gears["r2"])
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step("Shutdown interface r1-eth0")
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tgen.gears["r1"].vtysh_cmd(
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"""
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configure
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int r1-eth0
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shutdown
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"""
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)
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step("Remove the neighbor from r1")
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tgen.gears["r1"].vtysh_cmd(
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"""
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configure
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router bgp
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no neighbor r1-eth0 interface remote-as external
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"""
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)
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step("Ensure that BGP does not crash")
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test_func = functools.partial(_bgp_nexthop_cache)
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_, result = topotest.run_and_expect(test_func, True, count=10, wait=1)
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assert result is True, "BGP did not crash on r1"
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if __name__ == "__main__":
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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