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tests: an srv6 sid reachability use-case

Browse Source 
Verify that SRv6 SID becomes unreachable and
further the IPv4 route in L3VPN becomes invalid.

Signed-off-by: Dmytro Shytyi <dmytro.shytyi@6wind.com>
This commit is contained in:
Dmytro Shytyi 2023-11-06 16:03:26 +01:00
parent b3ac50287d
commit 51014631f0
28 changed files with 498 additions and 0 deletions
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0
tests/topotests/bgp_srv6_sid_reachability/c11/bgpd.conf Normal file
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tests/topotests/bgp_srv6_sid_reachability/c11/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.1.254
ipv6 route ::/0 2001:1::ffff
!

6
tests/topotests/bgp_srv6_sid_reachability/c11/zebra.conf Normal file
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hostname c11
!
interface eth0
ip address 192.168.1.1/24
ipv6 address 2001:1::1/64
!

0
tests/topotests/bgp_srv6_sid_reachability/c12/bgpd.conf Normal file
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tests/topotests/bgp_srv6_sid_reachability/c12/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.1.254
ipv6 route ::/0 2001:1::ffff
!

6
tests/topotests/bgp_srv6_sid_reachability/c12/zebra.conf Normal file
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hostname c12
!
interface eth0
ip address 192.168.1.1/24
ipv6 address 2001:1::1/64
!

0
tests/topotests/bgp_srv6_sid_reachability/c21/bgpd.conf Normal file
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tests/topotests/bgp_srv6_sid_reachability/c21/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.2.254
ipv6 route ::/0 2001:2::ffff
!

6
tests/topotests/bgp_srv6_sid_reachability/c21/zebra.conf Normal file
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hostname c21
!
interface eth0
ip address 192.168.2.1/24
ipv6 address 2001:2::1/64
!

0
tests/topotests/bgp_srv6_sid_reachability/c22/bgpd.conf Normal file
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tests/topotests/bgp_srv6_sid_reachability/c22/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.2.254
ipv6 route ::/0 2001:2::ffff
!

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tests/topotests/bgp_srv6_sid_reachability/c22/zebra.conf Normal file
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hostname c22
!
interface eth0
ip address 192.168.2.1/24
ipv6 address 2001:2::1/64
!
ip route 0.0.0.0/0 192.168.2.254
ipv6 route ::/0 2001:2::ffff
!

0
tests/topotests/bgp_srv6_sid_reachability/c31/bgpd.conf Normal file
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4
tests/topotests/bgp_srv6_sid_reachability/c31/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.3.254
ipv6 route ::/0 2001:3::ffff
!

6
tests/topotests/bgp_srv6_sid_reachability/c31/zebra.conf Normal file
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hostname c31
!
interface eth0
ip address 192.168.3.1/24
ipv6 address 2001:3::1/64
!

0
tests/topotests/bgp_srv6_sid_reachability/c32/bgpd.conf Normal file
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tests/topotests/bgp_srv6_sid_reachability/c32/staticd.conf Normal file
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!
ip route 0.0.0.0/0 192.168.3.254
ipv6 route ::/0 2001:3::ffff
!

6
tests/topotests/bgp_srv6_sid_reachability/c32/zebra.conf Normal file
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hostname c32
!
interface eth0
ip address 192.168.3.1/24
ipv6 address 2001:3::1/64
!

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tests/topotests/bgp_srv6_sid_reachability/r1/bgpd.conf Normal file
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frr defaults traditional
!
hostname r1
password zebra
!
log commands
!
router bgp 65001
bgp router-id 192.0.2.1
no bgp ebgp-requires-policy
no bgp default ipv4-unicast
neighbor 2001:db8:12::2 remote-as 65002
neighbor 2001:db8:12::2 timers 3 10
neighbor 2001:db8:12::2 timers connect 1
neighbor 2001:db8:12::2 capability extended-nexthop
neighbor 2001:db8:13::3 remote-as 65001
neighbor 2001:db8:13::3 timers 3 10
neighbor 2001:db8:13::3 timers connect 1
neighbor 2001:db8:13::3 capability extended-nexthop
!
segment-routing srv6
locator default
!
address-family ipv4 vpn
neighbor 2001:db8:12::2 activate
neighbor 2001:db8:13::3 activate
exit-address-family
!
!
router bgp 65001 vrf vrf10
bgp router-id 192.0.2.1
!
address-family ipv4 unicast
redistribute connected
sid vpn export 1
rd vpn export 65001:10
rt vpn both 0:10
import vpn
export vpn
exit-address-family
!
!
router bgp 65001 vrf vrf20
bgp router-id 192.0.2.1
!
address-family ipv4 unicast
redistribute connected
sid vpn export 2
rd vpn export 65001:20
rt vpn both 0:20
import vpn
export vpn
exit-address-family
!
!
interface eth0
mpls bgp forwarding
!
interface eth1
mpls bgp forwarding
!

4
tests/topotests/bgp_srv6_sid_reachability/r1/staticd.conf Normal file
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!
ipv6 route 2001:db8:2:2::/64 2001:db8:12::2
ipv6 route 2001:db8:3:3::/64 2001:db8:13::3
!

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tests/topotests/bgp_srv6_sid_reachability/r1/zebra.conf Normal file
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log file zebra.log
!
hostname r1
!
interface lo
ipv6 address 2001:db8:1:1::1/128
!
interface eth0
ipv6 address 2001:db8:12::1/64
!
interface eth1
ipv6 address 2001:db8:13::1/64
!
interface eth2 vrf vrf10
ip address 192.168.1.254/24
!
interface eth3 vrf vrf20
ip address 192.168.1.254/24
!
segment-routing
srv6
locators
locator default
prefix 2001:db8:1:1::/64
!
!
!
ip forwarding
ipv6 forwarding
!
line vty
!

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tests/topotests/bgp_srv6_sid_reachability/r2/bgpd.conf Normal file
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frr defaults traditional
!
hostname r2
password zebra
!
log commands
!
router bgp 65002
bgp router-id 192.0.2.2
no bgp ebgp-requires-policy
no bgp default ipv4-unicast
neighbor 2001:db8:12::1 remote-as 65001
neighbor 2001:db8:12::1 timers 3 10
neighbor 2001:db8:12::1 timers connect 1
neighbor 2001:db8:12::1 capability extended-nexthop
!
segment-routing srv6
locator default
!
address-family ipv4 vpn
neighbor 2001:db8:12::1 activate
exit-address-family
!
!
router bgp 65002 vrf vrf10
bgp router-id 192.0.2.2
!
address-family ipv4 unicast
redistribute connected
sid vpn export 1
rd vpn export 65002:10
rt vpn both 0:10
import vpn
export vpn
exit-address-family
!
!
router bgp 65002 vrf vrf20
bgp router-id 192.0.2.2
!
address-family ipv4 unicast
redistribute connected
sid vpn export 2
rd vpn export 65002:20
rt vpn both 0:20
import vpn
export vpn
exit-address-family
!
!

4
tests/topotests/bgp_srv6_sid_reachability/r2/staticd.conf Normal file
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!
ipv6 route 2001:db8:1:1::/64 2001:db8:12::1
ipv6 route 2001:db8:3:3::/64 2001:db8:12::1
!

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tests/topotests/bgp_srv6_sid_reachability/r2/zebra.conf Normal file
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log file zebra.log
!
hostname r2
!
interface lo
ipv6 address 2001:db8:2:2::1/128
!
interface eth0
ipv6 address 2001:db8:12::2/64
!
interface eth1 vrf vrf10
ip address 192.168.2.254/24
!
interface eth2 vrf vrf20
ip address 192.168.2.254/24
!
segment-routing
srv6
locators
locator default
prefix 2001:db8:2:2::/64
!
!
!
ip forwarding
ipv6 forwarding
!
line vty
!

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tests/topotests/bgp_srv6_sid_reachability/r3/bgpd.conf Normal file
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frr defaults traditional
!
hostname r2
password zebra
!
log commands
!
router bgp 65001
bgp router-id 192.0.2.3
no bgp ebgp-requires-policy
no bgp default ipv4-unicast
neighbor 2001:db8:13::1 remote-as 65001
neighbor 2001:db8:13::1 timers 3 10
neighbor 2001:db8:13::1 timers connect 1
neighbor 2001:db8:13::1 capability extended-nexthop
!
segment-routing srv6
locator default
!
address-family ipv4 vpn
neighbor 2001:db8:13::1 activate
exit-address-family
!
!
router bgp 65001 vrf vrf10
bgp router-id 192.0.2.3
!
address-family ipv4 unicast
redistribute connected
sid vpn export 1
rd vpn export 65001:10
rt vpn both 0:10
import vpn
export vpn
exit-address-family
!
!
router bgp 65001 vrf vrf20
bgp router-id 192.0.2.2
!
address-family ipv4 unicast
redistribute connected
sid vpn export 2
rd vpn export 65001:20
rt vpn both 0:20
import vpn
export vpn
exit-address-family
!
!

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tests/topotests/bgp_srv6_sid_reachability/r3/staticd.conf Normal file
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!
ipv6 route 2001:db8:12::/64 2001:db8:13::1
!
ipv6 route 2001:db8:1:1::/64 2001:db8:13::1
ipv6 route 2001:db8:2:2::/64 2001:db8:13::1
!

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tests/topotests/bgp_srv6_sid_reachability/r3/zebra.conf Normal file
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log file zebra.log
!
hostname r2
!
interface lo
ipv6 address 2001:db8:3:3::1/128
!
interface eth0
ipv6 address 2001:db8:13::3/64
!
interface eth1 vrf vrf10
ip address 192.168.3.254/24
!
interface eth2 vrf vrf20
ip address 192.168.3.254/24
!
segment-routing
srv6
locators
locator default
prefix 2001:db8:3:3::/64
!
!
!
ip forwarding
ipv6 forwarding
!
line vty
!

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tests/topotests/bgp_srv6_sid_reachability/test_bgp_srv6_sid_reachability.py Executable file
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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# Part of NetDEF Topology Tests
#
# Copyright (c) 2023 by 6WIND
#
import os
import re
import sys
import json
import functools
import pytest
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
from lib.common_config import required_linux_kernel_version
from lib.checkping import check_ping
pytestmark = [pytest.mark.bgpd, pytest.mark.staticd]
def build_topo(tgen):
tgen.add_router("r1")
tgen.add_router("r2")
tgen.add_router("r3")
tgen.add_router("c11")
tgen.add_router("c12")
tgen.add_router("c21")
tgen.add_router("c22")
tgen.add_router("c31")
tgen.add_router("c32")
tgen.add_link(tgen.gears["r1"], tgen.gears["r2"], "eth0", "eth0")
tgen.add_link(tgen.gears["r1"], tgen.gears["r3"], "eth1", "eth0")
tgen.add_link(tgen.gears["r1"], tgen.gears["c11"], "eth2", "eth0")
tgen.add_link(tgen.gears["r1"], tgen.gears["c12"], "eth3", "eth0")
tgen.add_link(tgen.gears["r2"], tgen.gears["c21"], "eth1", "eth0")
tgen.add_link(tgen.gears["r2"], tgen.gears["c22"], "eth2", "eth0")
tgen.add_link(tgen.gears["r3"], tgen.gears["c31"], "eth1", "eth0")
tgen.add_link(tgen.gears["r3"], tgen.gears["c32"], "eth2", "eth0")
def setup_module(mod):
result = required_linux_kernel_version("5.15")
if result is not True:
pytest.skip("Kernel requirements are not met")
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
for rname, router in tgen.routers().items():
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_STATIC, os.path.join(CWD, "{}/staticd.conf".format(rname))
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
)
tgen.gears["r1"].run("sysctl net.vrf.strict_mode=1")
tgen.gears["r1"].run("ip link add vrf10 type vrf table 10")
tgen.gears["r1"].run("ip link set vrf10 up")
tgen.gears["r1"].run("ip link add vrf20 type vrf table 20")
tgen.gears["r1"].run("ip link set vrf20 up")
tgen.gears["r1"].run("ip link set eth2 master vrf10")
tgen.gears["r1"].run("ip link set eth3 master vrf20")
tgen.gears["r2"].run("sysctl net.vrf.strict_mode=1")
tgen.gears["r2"].run("ip link add vrf10 type vrf table 10")
tgen.gears["r2"].run("ip link set vrf10 up")
tgen.gears["r2"].run("ip link add vrf20 type vrf table 20")
tgen.gears["r2"].run("ip link set vrf20 up")
tgen.gears["r2"].run("ip link set eth1 master vrf10")
tgen.gears["r2"].run("ip link set eth2 master vrf20")
tgen.gears["r3"].run("sysctl net.vrf.strict_mode=1")
tgen.gears["r3"].run("ip link add vrf10 type vrf table 10")
tgen.gears["r3"].run("ip link set vrf10 up")
tgen.gears["r3"].run("ip link add vrf20 type vrf table 20")
tgen.gears["r3"].run("ip link set vrf20 up")
tgen.gears["r3"].run("ip link set eth1 master vrf10")
tgen.gears["r3"].run("ip link set eth2 master vrf20")
tgen.start_router()
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_ping():
tgen = get_topogen()
check_ping("c11", "192.168.2.1", True, 10, 1)
check_ping("c11", "192.168.3.1", True, 10, 1)
check_ping("c12", "192.168.2.1", True, 10, 1)
check_ping("c12", "192.168.3.1", True, 10, 1)
check_ping("c21", "192.168.3.1", True, 10, 1)
check_ping("c22", "192.168.3.1", True, 10, 1)
def test_sid_unreachable_nht():
get_topogen().gears["r1"].vtysh_cmd(
"""
configure terminal
no ipv6 route 2001:db8:2:2::/64 2001:db8:12::2
"""
)
check_ping("c11", "192.168.2.1", False, 10, 1)
def test_sid_reachable_again_nht():
get_topogen().gears["r1"].vtysh_cmd(
"""
configure terminal
ipv6 route 2001:db8:2:2::/64 2001:db8:12::2
"""
)
check_ping("c11", "192.168.2.1", True, 10, 1)
def test_sid_unreachable_bgp_update():
get_topogen().gears["r2"].vtysh_cmd(
"""
configure terminal
router bgp 65002
no segment-routing srv6
exit
router bgp 65002 vrf vrf10
address-family ipv4 unicast
no sid vpn export 1
"""
)
check_ping("c11", "192.168.2.1", False, 10, 1)
def test_sid_reachable_again_bgp_update():
get_topogen().gears["r2"].vtysh_cmd(
"""
configure terminal
router bgp 65002
segment-routing srv6
locator default
exit
exit
router bgp 65002 vrf vrf10
address-family ipv4 unicast
sid vpn export 1
"""
)
check_ping("c11", "192.168.2.1", True, 10, 1)
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))