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test_bgp_set_aspath_replace.py
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test_bgp_set_aspath_replace.py
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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2022 Nathan Mangar
"""
Test if `set as-path replace` is working correctly for route-maps.
"""
__topotests_file__ = "bgp_set_aspath_replace/test_bgp_set_aspath_replace.py"
__topotests_gitrev__ = "77e3d82167b97a1ff4abe59d6e4f12086a61d9f9"
# pylint: disable=invalid-name, missing-class-docstring, missing-function-docstring, line-too-long, consider-using-f-string, wildcard-import, unused-wildcard-import, f-string-without-interpolation, too-few-public-methods
from topotato import *
@topology_fixture()
def topology(topo):
"""
[ r1 ]
|
{ s1 }--[ r3 ]
| |
[ r2 ]--{ s2 }
"""
topo.router("r3").lo_ip4.append("172.16.255.31/32")
topo.router("r3").lo_ip4.append("172.16.255.32/32")
class Configs(FRRConfigs):
routers = ["r1", "r2", "r3"]
zebra = """
#% extends "boilerplate.conf"
#% block main
#% if router.name == 'r3'
interface lo
ip address {{ routers.r3.lo_ip4[0] }}
ip address {{ routers.r3.lo_ip4[0] }}
!
#% endif
#% for iface in router.ifaces
interface {{ iface.ifname }}
ip address {{ iface.ip4[0] }}
!
#% endfor
ip forwarding
!
#% endblock
"""
bgpd = """
#% block main
#% if router.name == 'r1'
router bgp 65001
no bgp ebgp-requires-policy
neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} remote-as external
neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} timers 3 10
address-family ipv4 unicast
neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} route-map r2 in
!
ip prefix-list p1 seq 5 permit {{ routers.r3.lo_ip4[0] }}
!
route-map r2 permit 10
match ip address prefix-list p1
set as-path replace 65003
route-map r2 permit 20
set as-path replace any
!
#% elif router.name == 'r2'
router bgp 65002
no bgp ebgp-requires-policy
neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} remote-as external
neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} timers 3 10
neighbor {{ routers.r3.iface_to('s2').ip4[0].ip }} remote-as external
neighbor {{ routers.r3.iface_to('s2').ip4[0].ip }} timers 3 10
!
#% elif router.name == 'r3'
router bgp 65003
no bgp ebgp-requires-policy
neighbor {{ routers.r2.iface_to('s2').ip4[0].ip }} remote-as external
neighbor {{ routers.r2.iface_to('s2').ip4[0].ip }} timers 3 10
address-family ipv4 unicast
redistribute connected
!
#% endif
#% endblock
"""
class BGPSetAspathReplace(TestBase, AutoFixture, topo=topology, configs=Configs):
@topotatofunc
def bgp_converge(self, _, r1, r3):
expected = {
"routes": {
str(r3.lo_ip4[0]): [{"path": "65002 65001"}],
str(r3.lo_ip4[1]): [{"path": "65001 65001"}],
}
}
yield from AssertVtysh.make(
r1,
"bgpd",
f"show bgp ipv4 unicast json",
maxwait=5.0,
compare=expected,
)