--- /dev/null
+#!/usr/bin/env python
+# SPDX-License-Identifier: ISC
+
+#
+# test_ospf_prune_next_hop
+#
+# Copyright (c) 2025 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, get_topogen
+from lib.topolog import logger
+
+from lib.common_config import (
+ step,
+)
+
+
+"""
+test_ospf_metric_propagation.py: Test OSPF/BGP metric propagation
+"""
+
+TOPOLOGY = """
+ 20.1.3.0 20.1.4.0 20.1.5.0 20.1.6.0
+ eth0 | .3 eth0 | .4 eth0 | .5 eth0 | .6
+ +--+-+ +--+-+ +--+-+ +--+-+
+10.1 3.0 | R3 | | R4 | | R5 | | R6 |
+ +-----+ | | |eth1 | |eth1 | | 10.1.3.0/24
+ | | | | +---- | |--- + -+---+
+ | +--+-+ +--+-+ +--+-+ +--+-+ |
+ | eth2 | .3 eth2 | .4 eth2 | .5 eth2 | |
+eth0| | | | | | eth0
+ +--+--+ ++-------+ Switch Network +---------++ +--+---+
+ | R7 | | 10.1.2.0/24 | | R8 |
+ +-----+ +------------------------------------+ +------+
+ eth1 | .2
+ +--+--+
+ | R2 |
+ +--+--+
+ eth0 | .2
+ 10.1.1.0/24 |
+ eth0 | .1
+ +--+--+
+ | R1 |
+ +-----+
+
+"""
+
+# 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 8 routers
+ tgen.add_router("r1")
+ tgen.add_router("r2")
+ tgen.add_router("r3")
+ tgen.add_router("r4")
+ tgen.add_router("r5")
+ tgen.add_router("r6")
+ tgen.add_router("r7")
+ tgen.add_router("r8")
+
+ # Interconect router 1, 2 (0)
+ switch = tgen.add_switch("s1-1-2")
+ switch.add_link(tgen.gears["r1"])
+ switch.add_link(tgen.gears["r2"])
+
+ # Add standalone networks to router 3
+ switch = tgen.add_switch("s2-3")
+ switch.add_link(tgen.gears["r3"])
+
+ # Add standalone network to router 4
+ switch = tgen.add_switch("s3-4")
+ switch.add_link(tgen.gears["r4"])
+
+ # Add standalone network to router 5
+ switch = tgen.add_switch("s4-5")
+ switch.add_link(tgen.gears["r5"])
+
+ # Add standalone network to router 6
+ switch = tgen.add_switch("s5-6")
+ switch.add_link(tgen.gears["r6"])
+
+ # Interconect routers 3, 4, 5, and 6
+ switch = tgen.add_switch("s6-3")
+ switch.add_link(tgen.gears["r3"])
+ switch.add_link(tgen.gears["r7"])
+ switch = tgen.add_switch("s7-4")
+ switch.add_link(tgen.gears["r4"])
+ switch = tgen.add_switch("s8-5")
+ switch.add_link(tgen.gears["r5"])
+ switch = tgen.add_switch("s9-6")
+ switch.add_link(tgen.gears["r6"])
+ switch.add_link(tgen.gears["r8"])
+
+ # Interconect routers 2, 3, 4, 5, and 6
+ switch = tgen.add_switch("s10-lan")
+ switch.add_link(tgen.gears["r2"])
+ switch.add_link(tgen.gears["r3"])
+ switch.add_link(tgen.gears["r4"])
+ switch.add_link(tgen.gears["r5"])
+ switch.add_link(tgen.gears["r6"])
+
+
+def setup_module(mod):
+ logger.info("OSPF Prune Next Hops:\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_intra_area_route_prune():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip("Skipped because of router(s) failure")
+
+ step("Test OSPF intra-area route 10.1.3.0/24 duplicate nexthops already pruned")
+ # Verify OSPF route 10.1.3.0/24 nexthops pruned already.
+ r1 = tgen.gears["r1"]
+ input_dict = {
+ "10.1.3.0/24": {
+ "routeType": "N",
+ "transit": True,
+ "cost": 30,
+ "area": "0.0.0.0",
+ "nexthops": [
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "8.8.8.8"}
+ ],
+ }
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip ospf route detail json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "OSPF Intra-Area route 10.1.3.0/24 mismatch on router r1"
+ assert result is None, assertmsg
+
+ step("Test IP route 10.1.3.0/24 installed")
+ input_dict = {
+ "10.1.3.0/24": [
+ {
+ "prefix": "10.1.3.0/24",
+ "prefixLen": 24,
+ "protocol": "ospf",
+ "vrfName": "default",
+ "distance": 20,
+ "metric": 30,
+ "installed": True,
+ "internalNextHopNum": 1,
+ "internalNextHopActiveNum": 1,
+ "nexthops": [
+ {
+ "ip": "10.1.1.2",
+ "afi": "ipv4",
+ "interfaceName": "r1-eth0",
+ "active": True,
+ "weight": 1,
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip route 10.1.3.0/24 json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "IP route 10.1.3.0/24 mismatch on router r1"
+ assert result is None, assertmsg
+
+
+def test_inter_area_route_prune():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip("Skipped because of router(s) failure")
+
+ step("Test OSPF inter-area route 20.1.0.0/16 duplicate nexthops installed")
+ # Verify OSPF route 20.1.0.0/16 duplication nexthops
+ r1 = tgen.gears["r1"]
+ input_dict = {
+ "20.1.0.0/16": {
+ "routeType": "N IA",
+ "cost": 30,
+ "area": "0.0.0.0",
+ "nexthops": [
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "3.3.3.3"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "4.4.4.4"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "5.5.5.5"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "6.6.6.6"},
+ ],
+ }
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip ospf route detail json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "OSPF Inter-Area route 20.1.0.0/16 mismatch on router r1"
+ assert result is None, assertmsg
+
+ step("Test IP route 10.1.3.0/24 installed with pruned next-hops")
+ input_dict = {
+ "20.1.0.0/16": [
+ {
+ "prefix": "20.1.0.0/16",
+ "prefixLen": 16,
+ "protocol": "ospf",
+ "vrfName": "default",
+ "distance": 20,
+ "metric": 30,
+ "installed": True,
+ "internalNextHopNum": 1,
+ "internalNextHopActiveNum": 1,
+ "nexthops": [
+ {
+ "ip": "10.1.1.2",
+ "afi": "ipv4",
+ "interfaceName": "r1-eth0",
+ "active": True,
+ "weight": 1,
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip route 20.1.0.0/16 json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "IP route 20.1.1.0/24 mismatch on router r1"
+ assert result is None, assertmsg
+
+
+def test_as_external_route_prune():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip("Skipped because of router(s) failure")
+
+ step("Test OSPF AS external route 100.100.100.100 duplicate nexthops installed")
+ # Verify OSPF route 20.1.0.0/16 duplication nexthops
+ r1 = tgen.gears["r1"]
+ input_dict = {
+ "100.100.100.100/32": {
+ "routeType": "N E2",
+ "cost": 20,
+ "type2cost": 20,
+ "tag": 0,
+ "nexthops": [
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "3.3.3.3"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "4.4.4.4"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "5.5.5.5"},
+ {"ip": "10.1.1.2", "via": "r1-eth0", "advertisedRouter": "6.6.6.6"},
+ ],
+ }
+ }
+ test_func = partial(
+ topotest.router_json_cmp, r1, "show ip ospf route detail json", input_dict
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "OSPF AS external route 100.100.100.100/32 mismatch on router r1"
+ assert result is None, assertmsg
+
+ step("Test IP route 100.100.100.100/32 installed with pruned next-hops")
+ input_dict = {
+ "100.100.100.100/32": [
+ {
+ "prefix": "100.100.100.100/32",
+ "prefixLen": 32,
+ "protocol": "ospf",
+ "vrfName": "default",
+ "distance": 20,
+ "metric": 20,
+ "installed": True,
+ "internalNextHopNum": 1,
+ "internalNextHopActiveNum": 1,
+ "nexthops": [
+ {
+ "ip": "10.1.1.2",
+ "afi": "ipv4",
+ "interfaceName": "r1-eth0",
+ "active": True,
+ "weight": 1,
+ }
+ ],
+ }
+ ]
+ }
+ test_func = partial(
+ topotest.router_json_cmp,
+ r1,
+ "show ip route 100.100.100.100/32 json",
+ input_dict,
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
+ assertmsg = "IP route 100.100.100.100/32 mismatch on router r1"
+ 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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