--- /dev/null
+#!/usr/bin/env python
+# SPDX-License-Identifier: ISC
+
+#
+# test_ospf_multi_instance.py
+#
+# Copyright (c) 2024 LabN Consulting
+# Acee Lindem
+#
+
+import os
+import sys
+from functools import partial
+import pytest
+
+# 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 (
+ step,
+ create_interface_in_kernel,
+)
+
+
+"""
+test_ospf_metric_propagation.py: Test OSPF/BGP metric propagation
+"""
+
+TOPOLOGY = """
+
+ +---------+ +--------------------+ +---------+
+ | r1 | | r2 | r2 | | r3 |
+ | | | ospf 1 | ospf 2 | | |
+ | 1.1.1.1 | eth0 eth0| 2.2.2.1 | 2.2.2.2 |eth1 eth0| 3.3.3.1 |
+ | +-------------+ | +-------------+ |
+ | | 10.1.1.0/24 | | | 10.1.2.0/24 | |
+ +---------+ +--------------------+ +---------+
+
+
+"""
+
+# Save the Current Working Directory to find configuration files.
+CWD = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(CWD, "../"))
+
+# Required to instantiate the topology builder class.
+
+pytestmark = [pytest.mark.ospfd, pytest.mark.bgpd]
+
+
+def build_topo(tgen):
+ "Build function"
+
+ # Create 3 routers
+ tgen.add_router("r1")
+ tgen.add_router("r2")
+ tgen.add_router("r3")
+
+ # Interconect router 1, 2 (0)
+ switch = tgen.add_switch("s1-1-2")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r2"])
+
+ # Interconect router 2, 3 (1)
+ switch = tgen.add_switch("s2-2-3")
+ switch.add_link(tgen.gears["r2"])
+ switch.add_link(tgen.gears["r3"])
+
+ # Add more loopbacks to r2
+ create_interface_in_kernel(
+ tgen, "r2", "lo1", "2.2.2.1", netmask="255.255.255.255", create=True
+ )
+ create_interface_in_kernel(
+ tgen, "r2", "lo2", "2.2.2.2", netmask="255.255.255.255", create=True
+ )
+
+
+def setup_module(mod):
+ logger.info("OSPF Multi-Instance:\n {}".format(TOPOLOGY))
+
+ tgen = Topogen(build_topo, mod.__name__)
+ tgen.start_topology()
+
+ # Starting Routers
+ router_list = tgen.routers()
+
+ for rname, router in router_list.items():
+ logger.info("Loading router %s" % rname)
+ router.load_frr_config(os.path.join(CWD, "{}/frr.conf".format(rname)))
+
+ # Initialize all routers.
+ tgen.start_router()
+
+
+def teardown_module():
+ "Teardown the pytest environment"
+ tgen = get_topogen()
+ tgen.stop_topology()
+
+
+def test_multi_instance_default_origination():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip("Skipped because of router(s) failure")
+
+ step("Configure a local default route")
+ r1 = tgen.gears["r1"]
+ r1.vtysh_cmd("conf t\nip route 0.0.0.0/0 Null0")
+
+ step("Verify the R1 configuration and install of 'ip route 0.0.0.0/0 Null0'")
+ prefix_suppression_cfg = (
+ tgen.net["r1"]
+ .cmd('vtysh -c "show running" | grep "^ip route 0.0.0.0/0 Null0"')
+ .rstrip()
+ )
+ assertmsg = "'ip route 0.0.0.0/0 Null0' applied, but not present in configuration"
+ assert prefix_suppression_cfg == "ip route 0.0.0.0/0 Null0", assertmsg
+
+ input_dict = {
+ "0.0.0.0/0": [
+ {
+ "prefix": "0.0.0.0/0",
+ "prefixLen": 0,
+ "protocol": "static",
+ "nexthops": [
+ {
+ "blackhole": True,
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip route 0.0.0.0/0 json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "0.0.0.0/0 not installed on router r1"
+ assert result is None, assertmsg
+
+ step(
+ "Verify the R1 configuration and advertisement of 'default-information originate'"
+ )
+ r1.vtysh_cmd("conf t\nrouter ospf\n default-information originate")
+
+ input_dict = {
+ "asExternalLinkStates": [
+ {
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "1.1.1.1",
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip ospf database json", input_dict
+ )
+
+ r2 = tgen.gears["r2"]
+ step("Verify the OSPF instance 1 installation of default route on router 2")
+ input_dict = {
+ "0.0.0.0/0": [
+ {
+ "prefix": "0.0.0.0/0",
+ "prefixLen": 0,
+ "protocol": "ospf",
+ "instance": 1,
+ "nexthops": [
+ {
+ "ip": "10.1.1.1",
+ "interfaceName": "r2-eth0",
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r2, "show ip route 0.0.0.0/0 json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "0.0.0.0/0 not installed on router r2"
+ assert result is None, assertmsg
+
+ step("Configure OSPF 'default-intformation originate' on router r2 instance 2")
+ r2.vtysh_cmd("conf t\nrouter ospf 2\n default-information originate")
+
+ step("Verify r2 instance 2 AS-External default origination")
+ input_dict = {
+ "ospfInstance": 2,
+ "routerId": "2.2.2.2",
+ "asExternalLinkStates": [
+ {
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "2.2.2.2",
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "tos": 0,
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ],
+ }
+ test_func = partial(
+ topotest.router_json_cmp,
+ r2,
+ "show ip ospf 2 database external json",
+ input_dict,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "AS-External default not originated by router r2 OSPF instance 2"
+ assert result is None, assertmsg
+
+ step("Update the OSPF instance 2 distance so it will be preferred over instance 1")
+ r2.vtysh_cmd("conf t\nrouter ospf 2\n distance 15")
+
+ step("Generate a default route from OSPF on r3")
+ r3 = tgen.gears["r3"]
+ r3.vtysh_cmd("conf t\nrouter ospf\n default-information originate")
+ r3.vtysh_cmd("conf t\nip route 0.0.0.0/0 Null0")
+
+ step("Verify r3 AS-External default origination on r2")
+ input_dict = {
+ "ospfInstance": 2,
+ "routerId": "2.2.2.2",
+ "asExternalLinkStates": [
+ {
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "3.3.3.1",
+ "length": 36,
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "tos": 0,
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ],
+ }
+ test_func = partial(
+ topotest.router_json_cmp,
+ r2,
+ "show ip ospf 2 database external json",
+ input_dict,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "AS-External default not originated by router r3 OSPF"
+ assert result is None, assertmsg
+
+ step("Verify r3's default installed by OSPF instance 2 is preferred on r2")
+ input_dict = {
+ "0.0.0.0/0": [
+ {
+ "prefix": "0.0.0.0/0",
+ "prefixLen": 0,
+ "protocol": "ospf",
+ "instance": 2,
+ "distance": 15,
+ "nexthops": [
+ {
+ "ip": "10.1.2.3",
+ "interfaceName": "r2-eth1",
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r2, "show ip route 0.0.0.0/0 json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "0.0.0.0/0 from r3 not installed on router r2"
+ assert result is None, assertmsg
+
+ step(
+ "Verify that r2's OSPF instance 2 AS-External LSA default is flushed due to default from r3"
+ )
+ input_dict = {
+ "ospfInstance": 2,
+ "routerId": "2.2.2.2",
+ "asExternalLinkStates": [
+ {
+ "lsaAge": 3600,
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "2.2.2.2",
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "tos": 0,
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ],
+ }
+ test_func = partial(
+ topotest.router_json_cmp,
+ r2,
+ "show ip ospf 2 database external json",
+ input_dict,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "AS-External default not flushed by router r2 OSPF instance 2"
+ assert result is None, assertmsg
+
+ step("Remove r3's default route and verify that its advertisement is flushed")
+ r3.vtysh_cmd("conf t\nno ip route 0.0.0.0/0 Null0")
+ input_dict = {
+ "routerId": "3.3.3.1",
+ "asExternalLinkStates": [
+ {
+ "lsaAge": 3600,
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "3.3.3.1",
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "tos": 0,
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ],
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r3, "show ip ospf database external json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "AS-External default not flushed by router r3 OSPF"
+ assert result is None, assertmsg
+
+ step(
+ "Verify that r2's OSPF instance 2 AS-External default is advertised and installed by r3"
+ )
+ input_dict = {
+ "routerId": "3.3.3.1",
+ "asExternalLinkStates": [
+ {
+ "lsaType": "AS-external-LSA",
+ "linkStateId": "0.0.0.0",
+ "advertisingRouter": "2.2.2.2",
+ "networkMask": 0,
+ "metricType": "E2 (Larger than any link state path)",
+ "tos": 0,
+ "metric": 10,
+ "forwardAddress": "0.0.0.0",
+ "externalRouteTag": 0,
+ }
+ ],
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r3, "show ip ospf database external json", input_dict
+ )
+ assertmsg = "AS-External default not originated by r2 OSPF instance 2"
+ assert result is None, assertmsg
+
+ step("Verify r2's OSPF instance 2 is AS-External default is installed on r3")
+ input_dict = {
+ "0.0.0.0/0": [
+ {
+ "prefix": "0.0.0.0/0",
+ "prefixLen": 0,
+ "protocol": "ospf",
+ "distance": 20,
+ "nexthops": [
+ {
+ "ip": "10.1.2.2",
+ "interfaceName": "r3-eth0",
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r3, "show ip route 0.0.0.0/0 json", input_dict
+ )
+ _, 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))
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