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tests: Add topotest for OSPF multi-instance default origination.
This change adds a topotest to test various case of OSPF multi-instance
origination including cases where the criteria route is from another
instance of OSPF, as well as the same OSPF instance (where a default
should not be originated).
Signed-off-by: Acee Lindem <acee@lindem.com>
(cherry picked from commit 82f4349402)
This commit is contained in:
Acee Lindem
Mergify
parent
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commit
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19
tests/topotests/ospf_multi_instance/r1/frr.conf
Normal file
19
tests/topotests/ospf_multi_instance/r1/frr.conf
Normal file
@ -0,0 +1,19 @@
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!
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hostname r1
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password zebra
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log file /tmp/r1-frr.log
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ip forwarding
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!
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interface lo
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ip address 1.1.1.1/32
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ip ospf area 0
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!
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interface r1-eth0
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ip address 10.1.1.1/24
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ip ospf area 0
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!
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!
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router ospf
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ospf router-id 1.1.1.1
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distance 20
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!
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37
tests/topotests/ospf_multi_instance/r2/frr.conf
Normal file
37
tests/topotests/ospf_multi_instance/r2/frr.conf
Normal file
@ -0,0 +1,37 @@
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!
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hostname r2
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password zebra
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! debug ospf event
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! debug ospf lsa
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! debug ospf default-information
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! debug ospf zebra redistribute
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ip forwarding
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!
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interface lo1
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ip address 2.2.2.1/32
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ip ospf 1 area 0
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no shut
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!
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interface lo2
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ip address 2.2.2.2/32
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ip ospf 2 area 0
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no shut
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!
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interface r2-eth0
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ip address 10.1.1.2/24
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ip ospf 1 area 0
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!
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interface r2-eth1
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ip address 10.1.2.2/24
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ip ospf 2 area 0
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!
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router ospf 1
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ospf router-id 2.2.2.1
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distance 20
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!
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router ospf 2
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ospf router-id 2.2.2.2
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distance 20
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!
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19
tests/topotests/ospf_multi_instance/r3/frr.conf
Normal file
19
tests/topotests/ospf_multi_instance/r3/frr.conf
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@ -0,0 +1,19 @@
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!
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hostname r3
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password zebra
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log file /tmp/r3-frr.log
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ip forwarding
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!
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interface lo
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ip address 3.3.3.1/32
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ip ospf area 0
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!
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interface r3-eth0
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ip address 10.1.2.3/24
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ip ospf area 0
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!
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!
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router ospf
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ospf router-id 3.3.3.1
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distance 20
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!
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403
tests/topotests/ospf_multi_instance/test_ospf_multi_instance.py
Normal file
403
tests/topotests/ospf_multi_instance/test_ospf_multi_instance.py
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@ -0,0 +1,403 @@
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#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# test_ospf_multi_instance.py
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#
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# Copyright (c) 2024 LabN Consulting
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# Acee Lindem
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#
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import os
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import sys
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from functools import partial
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import pytest
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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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.topolog import logger
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from lib.common_config import (
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step,
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create_interface_in_kernel,
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)
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"""
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test_ospf_metric_propagation.py: Test OSPF/BGP metric propagation
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"""
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TOPOLOGY = """
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+---------+ +--------------------+ +---------+
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| r1 | | r2 | r2 | | r3 |
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| | | ospf 1 | ospf 2 | | |
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| 1.1.1.1 | eth0 eth0| 2.2.2.1 | 2.2.2.2 |eth1 eth0| 3.3.3.1 |
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| +-------------+ | +-------------+ |
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| | 10.1.1.0/24 | | | 10.1.2.0/24 | |
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+---------+ +--------------------+ +---------+
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"""
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# Save the Current Working Directory to find configuration files.
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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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# Required to instantiate the topology builder class.
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pytestmark = [pytest.mark.ospfd, pytest.mark.bgpd]
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def build_topo(tgen):
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"Build function"
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# Create 3 routers
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tgen.add_router("r1")
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tgen.add_router("r2")
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tgen.add_router("r3")
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# Interconect router 1, 2 (0)
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switch = tgen.add_switch("s1-1-2")
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switch.add_link(tgen.gears["r1"])
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switch.add_link(tgen.gears["r2"])
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# Interconect router 2, 3 (1)
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switch = tgen.add_switch("s2-2-3")
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switch.add_link(tgen.gears["r2"])
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switch.add_link(tgen.gears["r3"])
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# Add more loopbacks to r2
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create_interface_in_kernel(
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tgen, "r2", "lo1", "2.2.2.1", netmask="255.255.255.255", create=True
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)
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create_interface_in_kernel(
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tgen, "r2", "lo2", "2.2.2.2", netmask="255.255.255.255", create=True
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)
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def setup_module(mod):
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logger.info("OSPF Multi-Instance:\n {}".format(TOPOLOGY))
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tgen = Topogen(build_topo, mod.__name__)
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tgen.start_topology()
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# Starting Routers
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router_list = tgen.routers()
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for rname, router in router_list.items():
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logger.info("Loading router %s" % rname)
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router.load_frr_config(os.path.join(CWD, "{}/frr.conf".format(rname)))
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# Initialize all routers.
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tgen.start_router()
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def teardown_module():
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"Teardown the pytest environment"
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tgen = get_topogen()
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tgen.stop_topology()
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def test_multi_instance_default_origination():
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip("Skipped because of router(s) failure")
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step("Configure a local default route")
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r1 = tgen.gears["r1"]
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r1.vtysh_cmd("conf t\nip route 0.0.0.0/0 Null0")
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step("Verify the R1 configuration and install of 'ip route 0.0.0.0/0 Null0'")
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prefix_suppression_cfg = (
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tgen.net["r1"]
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.cmd('vtysh -c "show running" | grep "^ip route 0.0.0.0/0 Null0"')
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.rstrip()
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)
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assertmsg = "'ip route 0.0.0.0/0 Null0' applied, but not present in configuration"
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assert prefix_suppression_cfg == "ip route 0.0.0.0/0 Null0", assertmsg
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input_dict = {
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"0.0.0.0/0": [
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{
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"prefix": "0.0.0.0/0",
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"prefixLen": 0,
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"protocol": "static",
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"nexthops": [
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{
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"blackhole": True,
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}
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],
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}
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]
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}
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip route 0.0.0.0/0 json", input_dict
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "0.0.0.0/0 not installed on router r1"
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assert result is None, assertmsg
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step(
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"Verify the R1 configuration and advertisement of 'default-information originate'"
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)
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r1.vtysh_cmd("conf t\nrouter ospf\n default-information originate")
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input_dict = {
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"asExternalLinkStates": [
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{
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "1.1.1.1",
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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]
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}
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip ospf database json", input_dict
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)
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r2 = tgen.gears["r2"]
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step("Verify the OSPF instance 1 installation of default route on router 2")
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input_dict = {
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"0.0.0.0/0": [
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{
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"prefix": "0.0.0.0/0",
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"prefixLen": 0,
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"protocol": "ospf",
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"instance": 1,
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"nexthops": [
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{
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"ip": "10.1.1.1",
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"interfaceName": "r2-eth0",
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}
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],
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}
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]
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}
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test_func = partial(
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topotest.router_json_cmp, r2, "show ip route 0.0.0.0/0 json", input_dict
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "0.0.0.0/0 not installed on router r2"
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assert result is None, assertmsg
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step("Configure OSPF 'default-intformation originate' on router r2 instance 2")
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r2.vtysh_cmd("conf t\nrouter ospf 2\n default-information originate")
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step("Verify r2 instance 2 AS-External default origination")
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input_dict = {
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"ospfInstance": 2,
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"routerId": "2.2.2.2",
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"asExternalLinkStates": [
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{
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "2.2.2.2",
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"tos": 0,
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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],
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}
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test_func = partial(
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topotest.router_json_cmp,
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r2,
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"show ip ospf 2 database external json",
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input_dict,
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "AS-External default not originated by router r2 OSPF instance 2"
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assert result is None, assertmsg
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step("Update the OSPF instance 2 distance so it will be preferred over instance 1")
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r2.vtysh_cmd("conf t\nrouter ospf 2\n distance 15")
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step("Generate a default route from OSPF on r3")
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r3 = tgen.gears["r3"]
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r3.vtysh_cmd("conf t\nrouter ospf\n default-information originate")
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r3.vtysh_cmd("conf t\nip route 0.0.0.0/0 Null0")
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step("Verify r3 AS-External default origination on r2")
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input_dict = {
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"ospfInstance": 2,
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"routerId": "2.2.2.2",
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"asExternalLinkStates": [
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{
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "3.3.3.1",
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"length": 36,
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"tos": 0,
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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],
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}
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test_func = partial(
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topotest.router_json_cmp,
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r2,
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"show ip ospf 2 database external json",
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input_dict,
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "AS-External default not originated by router r3 OSPF"
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assert result is None, assertmsg
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step("Verify r3's default installed by OSPF instance 2 is preferred on r2")
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input_dict = {
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"0.0.0.0/0": [
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{
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"prefix": "0.0.0.0/0",
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"prefixLen": 0,
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"protocol": "ospf",
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"instance": 2,
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"distance": 15,
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"nexthops": [
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{
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"ip": "10.1.2.3",
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"interfaceName": "r2-eth1",
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}
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],
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}
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]
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}
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test_func = partial(
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topotest.router_json_cmp, r2, "show ip route 0.0.0.0/0 json", input_dict
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "0.0.0.0/0 from r3 not installed on router r2"
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assert result is None, assertmsg
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step(
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"Verify that r2's OSPF instance 2 AS-External LSA default is flushed due to default from r3"
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)
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input_dict = {
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"ospfInstance": 2,
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"routerId": "2.2.2.2",
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"asExternalLinkStates": [
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{
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"lsaAge": 3600,
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "2.2.2.2",
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"tos": 0,
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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],
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}
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test_func = partial(
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topotest.router_json_cmp,
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r2,
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"show ip ospf 2 database external json",
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input_dict,
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "AS-External default not flushed by router r2 OSPF instance 2"
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assert result is None, assertmsg
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step("Remove r3's default route and verify that its advertisement is flushed")
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r3.vtysh_cmd("conf t\nno ip route 0.0.0.0/0 Null0")
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input_dict = {
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"routerId": "3.3.3.1",
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"asExternalLinkStates": [
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{
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"lsaAge": 3600,
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "3.3.3.1",
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"tos": 0,
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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],
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}
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test_func = partial(
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topotest.router_json_cmp, r3, "show ip ospf database external json", input_dict
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)
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_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
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assertmsg = "AS-External default not flushed by router r3 OSPF"
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assert result is None, assertmsg
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step(
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"Verify that r2's OSPF instance 2 AS-External default is advertised and installed by r3"
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)
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input_dict = {
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"routerId": "3.3.3.1",
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"asExternalLinkStates": [
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{
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"lsaType": "AS-external-LSA",
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"linkStateId": "0.0.0.0",
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"advertisingRouter": "2.2.2.2",
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"networkMask": 0,
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"metricType": "E2 (Larger than any link state path)",
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"tos": 0,
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"metric": 10,
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"forwardAddress": "0.0.0.0",
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"externalRouteTag": 0,
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}
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],
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}
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test_func = partial(
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topotest.router_json_cmp, r3, "show ip ospf database external json", input_dict
|
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)
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assertmsg = "AS-External default not originated by r2 OSPF instance 2"
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assert result is None, assertmsg
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step("Verify r2's OSPF instance 2 is AS-External default is installed on r3")
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input_dict = {
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"0.0.0.0/0": [
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{
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"prefix": "0.0.0.0/0",
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"prefixLen": 0,
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"protocol": "ospf",
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"distance": 20,
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"nexthops": [
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{
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"ip": "10.1.2.2",
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"interfaceName": "r3-eth0",
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}
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],
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}
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]
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}
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test_func = partial(
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topotest.router_json_cmp, r3, "show ip route 0.0.0.0/0 json", input_dict
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)
|
||||
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
||||
assertmsg = "0.0.0.0/0 from router r2 not installed on r3"
|
||||
assert result is None, assertmsg
|
||||
|
||||
|
||||
def test_memory_leak():
|
||||
"Run the memory leak test and report results."
|
||||
tgen = get_topogen()
|
||||
if not tgen.is_memleak_enabled():
|
||||
pytest.skip("Memory leak test/report is disabled")
|
||||
|
||||
tgen.report_memory_leaks()
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
args = ["-s"] + sys.argv[1:]
|
||||
sys.exit(pytest.main(args))
|
||||
Loading…
Reference in New Issue
Block a user