diff options
Diffstat (limited to 'tests/topotests/bgp_gr_notification')
6 files changed, 263 insertions, 0 deletions
diff --git a/tests/topotests/bgp_gr_notification/__init__.py b/tests/topotests/bgp_gr_notification/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/tests/topotests/bgp_gr_notification/__init__.py diff --git a/tests/topotests/bgp_gr_notification/r1/bgpd.conf b/tests/topotests/bgp_gr_notification/r1/bgpd.conf new file mode 100644 index 0000000..6119f67 --- /dev/null +++ b/tests/topotests/bgp_gr_notification/r1/bgpd.conf @@ -0,0 +1,10 @@ +router bgp 65001 + no bgp ebgp-requires-policy + bgp graceful-restart + neighbor 192.168.255.2 remote-as external + neighbor 192.168.255.2 timers 1 3 + neighbor 192.168.255.2 timers connect 1 + address-family ipv4 + redistribute connected + exit-address-family +! diff --git a/tests/topotests/bgp_gr_notification/r1/zebra.conf b/tests/topotests/bgp_gr_notification/r1/zebra.conf new file mode 100644 index 0000000..091794f --- /dev/null +++ b/tests/topotests/bgp_gr_notification/r1/zebra.conf @@ -0,0 +1,9 @@ +! +interface lo + ip address 172.16.255.1/32 +! +interface r1-eth0 + ip address 192.168.255.1/24 +! +ip forwarding +! diff --git a/tests/topotests/bgp_gr_notification/r2/bgpd.conf b/tests/topotests/bgp_gr_notification/r2/bgpd.conf new file mode 100644 index 0000000..05e17f0 --- /dev/null +++ b/tests/topotests/bgp_gr_notification/r2/bgpd.conf @@ -0,0 +1,11 @@ +router bgp 65002 + no bgp ebgp-requires-policy + no bgp hard-administrative-reset + bgp graceful-restart + neighbor 192.168.255.1 remote-as external + neighbor 192.168.255.1 timers 1 3 + neighbor 192.168.255.1 timers connect 1 + address-family ipv4 + redistribute connected + exit-address-family +! diff --git a/tests/topotests/bgp_gr_notification/r2/zebra.conf b/tests/topotests/bgp_gr_notification/r2/zebra.conf new file mode 100644 index 0000000..1fcccbe --- /dev/null +++ b/tests/topotests/bgp_gr_notification/r2/zebra.conf @@ -0,0 +1,9 @@ +! +interface lo + ip address 172.16.255.2/32 +! +interface r2-eth0 + ip address 192.168.255.2/24 +! +ip forwarding +! diff --git a/tests/topotests/bgp_gr_notification/test_bgp_gr_notification.py b/tests/topotests/bgp_gr_notification/test_bgp_gr_notification.py new file mode 100644 index 0000000..3519e5c --- /dev/null +++ b/tests/topotests/bgp_gr_notification/test_bgp_gr_notification.py @@ -0,0 +1,224 @@ +#!/usr/bin/env python + +# +# bgp_gr_notification.py +# +# 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 +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY +# 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. +# + +""" +TC1: Disable the link between R1-R2 and wait for HoldTimerExpire notification: + 1) Check if R2 sent HoldTimerExpired notification + 2) Check if the routes are retained at R2 +TC2: Trigger `clear bgp` (Administrative Reset): + `bgp hard-administrative-reset` disabled: + a) Check if Administrative Reset notification was sent from R2 + b) Routes should be retained on R1 +""" + +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): + 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_hold_timer_expired_gr(): + # TC1 + tgen = get_topogen() + + if tgen.routers_have_failure(): + pytest.skip(tgen.errors) + + r1 = tgen.gears["r1"] + r2 = tgen.gears["r2"] + + def _bgp_converge(): + output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json")) + expected = { + "192.168.255.1": { + "bgpState": "Established", + "addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 2}}, + } + } + return topotest.json_cmp(output, expected) + + def _disable_link_r1_r2(): + r1.cmd_raises("ip link set down dev r1-eth0") + + def _enable_link_r1_r2(): + r1.cmd_raises("ip link set up dev r1-eth0") + + def _bgp_check_hold_timer_expire_reason(): + output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json")) + expected = { + "192.168.255.1": { + "lastNotificationReason": "Hold Timer Expired", + } + } + return topotest.json_cmp(output, expected) + + def _bgp_check_hold_timer_expire_stale(): + output = json.loads(r2.vtysh_cmd("show bgp ipv4 unicast 172.16.255.1/32 json")) + expected = { + "paths": [ + { + "stale": True, + "valid": True, + } + ] + } + return topotest.json_cmp(output, expected) + + step("Initial BGP converge") + test_func = functools.partial(_bgp_converge) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to see BGP convergence on R2" + + step("Disable the link between R1-R2") + _disable_link_r1_r2() + + step("Check if R2 sent HoldTimerExpire notification to R1") + test_func = functools.partial(_bgp_check_hold_timer_expire_reason) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to see Hold Timer Expired notification from R2 on R1" + + step("Check if the routes are retained at R2") + test_func = functools.partial(_bgp_check_hold_timer_expire_stale) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to see retained stale routes on R2" + + step("Enable the link between R1-R2") + _enable_link_r1_r2() + + +def test_bgp_administrative_reset_gr(): + # TC2 + tgen = get_topogen() + + if tgen.routers_have_failure(): + pytest.skip(tgen.errors) + + r1 = tgen.gears["r1"] + r2 = tgen.gears["r2"] + + def _bgp_converge(): + output = json.loads(r2.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json")) + expected = { + "192.168.255.1": { + "bgpState": "Established", + "addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 2}}, + } + } + return topotest.json_cmp(output, expected) + + def _bgp_check_hard_reset(): + output = json.loads(r1.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json")) + expected = { + "192.168.255.2": { + "lastNotificationReason": "Cease/Administrative Reset", + "lastNotificationHardReset": False, + } + } + return topotest.json_cmp(output, expected) + + def _bgp_check_gr_notification_stale(): + output = json.loads(r1.vtysh_cmd("show bgp ipv4 unicast 172.16.255.2/32 json")) + expected = { + "paths": [ + { + "stale": True, + "valid": True, + } + ] + } + return topotest.json_cmp(output, expected) + + def _bgp_clear_r1_and_shutdown(): + r2.vtysh_cmd( + """ + clear ip bgp 192.168.255.1 + configure terminal + router bgp + neighbor 192.168.255.1 shutdown + """ + ) + + step("Initial BGP converge") + test_func = functools.partial(_bgp_converge) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to see BGP convergence on R2" + + step("Reset and shutdown R1") + _bgp_clear_r1_and_shutdown() + + step("Check if Hard Reset notification wasn't sent from R2") + test_func = functools.partial(_bgp_check_hard_reset) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to send Administrative Reset notification from R2" + + step("Check if stale routes are retained on R1") + test_func = functools.partial(_bgp_check_gr_notification_stale) + _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + assert result is None, "Failed to see retained stale routes on R1" + + +if __name__ == "__main__": + args = ["-s"] + sys.argv[1:] + sys.exit(pytest.main(args)) |