tests: Check if we can override IPv6 next-hop for VPN networks in route-map

[mirror_frr.git] / tests / topotests / bgp_vpn_5549_route_map / test_bgp_vpn_5549_route_map.py

#!/usr/bin/env python

#
# Copyright (c) 2022 by
# Donatas Abraitis <donatas@opensourcerouting.org>
#
# Permission to use, copy, modify, and/or distribute this software
# for any purpose with or without fee is hereby granted, provided
# that the above copyright notice and this permission notice appear
# in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
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# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
#

"""
Check if we can override VPN underlay next-hop from PE1 to PE2.
"""

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
from lib.common_config import step

pytestmark = [pytest.mark.bgpd]


def build_topo(tgen):
    tgen.add_router("cpe1")
    tgen.add_router("cpe2")
    tgen.add_router("pe1")
    tgen.add_router("pe2")

    switch = tgen.add_switch("s1")
    switch.add_link(tgen.gears["cpe1"])
    switch.add_link(tgen.gears["pe1"])

    switch = tgen.add_switch("s2")
    switch.add_link(tgen.gears["pe1"])
    switch.add_link(tgen.gears["pe2"])

    switch = tgen.add_switch("s3")
    switch.add_link(tgen.gears["pe2"])
    switch.add_link(tgen.gears["cpe2"])


def setup_module(mod):
    tgen = Topogen(build_topo, mod.__name__)
    tgen.start_topology()

    pe1 = tgen.gears["pe1"]
    pe2 = tgen.gears["pe2"]

    pe1.run("ip link add RED type vrf table 1001")
    pe1.run("ip link set up dev RED")
    pe2.run("ip link add RED type vrf table 1001")
    pe2.run("ip link set up dev RED")
    pe1.run("ip link set pe1-eth0 master RED")
    pe2.run("ip link set pe2-eth1 master RED")

    pe1.run("sysctl -w net.ipv4.ip_forward=1")
    pe2.run("sysctl -w net.ipv4.ip_forward=1")
    pe1.run("sysctl -w net.mpls.conf.pe1-eth0.input=1")
    pe2.run("sysctl -w net.mpls.conf.pe2-eth1.input=1")

    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))
        )
        router.load_config(
            TopoRouter.RD_OSPF6, os.path.join(CWD, "{}/ospf6d.conf".format(rname))
        )
        router.load_config(
            TopoRouter.RD_LDP, os.path.join(CWD, "{}/ldpd.conf".format(rname))
        )

    tgen.start_router()


def teardown_module(mod):
    tgen = get_topogen()
    tgen.stop_topology()


def test_bgp_vpn_5549():
    tgen = get_topogen()

    pe2 = tgen.gears["pe2"]

    if tgen.routers_have_failure():
        pytest.skip(tgen.errors)

    def _bgp_vpn_nexthop_changed():
        output = json.loads(pe2.vtysh_cmd("show bgp ipv4 vpn json"))
        expected = {
            "routes": {
                "routeDistinguishers": {
                    "192.168.1.2:2": {
                        "172.16.255.1/32": [
                            {"valid": True, "nexthops": [{"ip": "2001:db8::1"}]}
                        ],
                        "192.168.1.0/24": [
                            {"valid": True, "nexthops": [{"ip": "2001:db8:1::1"}]}
                        ],
                    }
                }
            }
        }
        return topotest.json_cmp(output, expected)

    test_func = functools.partial(_bgp_vpn_nexthop_changed)
    _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
    assert result is None, "Failed overriding IPv6 next-hop for VPN underlay"


if __name__ == "__main__":
    args = ["-s"] + sys.argv[1:]
    sys.exit(pytest.main(args))