--- /dev/null
+#!/usr/bin/env python
+
+#
+# test_bfd_isis_topo1.py
+# Part of NetDEF Topology Tests
+#
+# Copyright (c) 2020 by
+# Network Device Education Foundation, Inc. ("NetDEF")
+#
+# 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.
+#
+
+"""
+test_bfd_isis_topo1.py:
+
+ +---------+
+ | |
+ eth-rt2 (.1) | RT1 | eth-rt3 (.1)
+ +----------+ 1.1.1.1 +----------+
+ | | | |
+ | +---------+ |
+ | |
+ | 10.0.2.0/24 |
+ | |
+ | eth-rt1 | (.2)
+ | 10.0.1.0/24 +----+----+
+ | | |
+ | | RT3 |
+ | | 3.3.3.3 |
+ | | |
+ (.2) | eth-rt1 +----+----+
+ +----+----+ eth-rt4 | (.1)
+ | | |
+ | RT2 | |
+ | 2.2.2.2 | 10.0.4.0/24 |
+ | | |
+ +----+----+ |
+ (.1) | eth-rt5 eth-rt3 | (.2)
+ | +----+----+
+ | | |
+ | | RT4 |
+ | | 4.4.4.4 |
+ | | |
+ | +----+----+
+ | 10.0.3.0/24 eth-rt5 | (.1)
+ | |
+ | |
+ | 10.0.5.0/24 |
+ | |
+ | +---------+ |
+ | | | |
+ +----------+ RT5 +----------+
+ eth-rt2 (.2) | 5.5.5.5 | eth-rt4 (.2)
+ | |
+ +---------+
+
+"""
+
+import os
+import sys
+import pytest
+import json
+import re
+from time import sleep
+from time import time
+from functools import partial
+
+# Save the Current Working Directory to find configuration files.
+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
+
+# Required to instantiate the topology builder class.
+from mininet.topo import Topo
+
+
+class TemplateTopo(Topo):
+ "Test topology builder"
+
+ def build(self, *_args, **_opts):
+ "Build function"
+ tgen = get_topogen(self)
+
+ #
+ # Define FRR Routers
+ #
+ for router in ["rt1", "rt2", "rt3", "rt4", "rt5"]:
+ tgen.add_router(router)
+
+ #
+ # Define connections
+ #
+ switch = tgen.add_switch("s1")
+ switch.add_link(tgen.gears["rt1"], nodeif="eth-rt2")
+ switch.add_link(tgen.gears["rt2"], nodeif="eth-rt1")
+
+ switch = tgen.add_switch("s2")
+ switch.add_link(tgen.gears["rt1"], nodeif="eth-rt3")
+ switch.add_link(tgen.gears["rt3"], nodeif="eth-rt1")
+
+ switch = tgen.add_switch("s3")
+ switch.add_link(tgen.gears["rt2"], nodeif="eth-rt5")
+ switch.add_link(tgen.gears["rt5"], nodeif="eth-rt2")
+
+ switch = tgen.add_switch("s4")
+ switch.add_link(tgen.gears["rt3"], nodeif="eth-rt4")
+ switch.add_link(tgen.gears["rt4"], nodeif="eth-rt3")
+
+ switch = tgen.add_switch("s5")
+ switch.add_link(tgen.gears["rt4"], nodeif="eth-rt5")
+ switch.add_link(tgen.gears["rt5"], nodeif="eth-rt4")
+
+
+def setup_module(mod):
+ "Sets up the pytest environment"
+ tgen = Topogen(TemplateTopo, mod.__name__)
+ tgen.start_topology()
+
+ router_list = tgen.routers()
+
+ # For all registered routers, load the zebra configuration file
+ for rname, router in router_list.iteritems():
+ router.load_config(
+ TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
+ )
+ router.load_config(
+ TopoRouter.RD_BFD, os.path.join(CWD, "{}/bfdd.conf".format(rname))
+ )
+ router.load_config(
+ TopoRouter.RD_ISIS, os.path.join(CWD, "{}/isisd.conf".format(rname))
+ )
+
+ tgen.start_router()
+
+
+def teardown_module(mod):
+ "Teardown the pytest environment"
+ tgen = get_topogen()
+
+ # This function tears down the whole topology.
+ tgen.stop_topology()
+
+
+def print_cmd_result(rname, command):
+ print(get_topogen().gears[rname].vtysh_cmd(command, isjson=False))
+
+
+def router_compare_json_output(rname, command, reference, count=120, wait=0.5):
+ "Compare router JSON output"
+
+ logger.info('Comparing router "%s" "%s" output', rname, command)
+
+ tgen = get_topogen()
+ filename = "{}/{}/{}".format(CWD, rname, reference)
+ expected = json.loads(open(filename).read())
+
+ # Run test function until we get an result. Wait at most 60 seconds.
+ test_func = partial(topotest.router_json_cmp, tgen.gears[rname], command, expected)
+ _, diff = topotest.run_and_expect(test_func, None, count=count, wait=wait)
+ assertmsg = '"{}" JSON output mismatches the expected result'.format(rname)
+ assert diff is None, assertmsg
+
+
+## TEST STEPS
+
+
+def test_rib_isis_step1():
+ logger.info("Test (step 1): verify RIB (IPv4 and IPv6) for IS-IS")
+ tgen = get_topogen()
+
+ # Skip if previous fatal error condition is raised
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ router_compare_json_output(
+ "rt1", "show ip route isis json", "step1/show_ip_route.ref"
+ )
+ router_compare_json_output(
+ "rt1", "show ipv6 route isis json", "step1/show_ipv6_route.ref"
+ )
+
+
+def test_bfd_isis_sessions_step2():
+ logger.info("Test (step 2): verify BFD peers for IS-IS")
+ tgen = get_topogen()
+
+ # Skip if previous fatal error condition is raised
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ # BFD is just used on three routers
+ for rt in ["rt1", "rt2", "rt3"]:
+ router_compare_json_output(
+ rt, "show bfd peers json", "step2/show_bfd_peers.ref"
+ )
+
+
+def test_bfd_isis_interface_failure_rt2_step3():
+ logger.info("Test (step 2): check failover handling when RT2 goes down")
+ tgen = get_topogen()
+
+ # Skip if previous fatal error condition is raised
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ # Let's kill the interface on rt2 and see what happens with the RIB and BFD on rt1
+ tgen.gears["rt2"].link_enable("eth-rt1", enabled=False)
+
+ # By default BFD provides a recovery time of 900ms plus jitter, so let's wait
+ # initial 2 seconds to let the CI not suffer.
+ # TODO: add check for array size
+ sleep(2)
+ router_compare_json_output(
+ "rt1", "show ip route isis json", "step3/show_ip_route_rt2_down.ref", 1, 0
+ )
+ router_compare_json_output(
+ "rt1", "show ipv6 route isis json", "step3/show_ipv6_route_rt2_down.ref", 1, 0
+ )
+ router_compare_json_output(
+ "rt1", "show bfd peers json", "step3/show_bfd_peers_rt2_down.ref", 1, 0
+ )
+
+ # Check recovery, this can take some time
+ tgen.gears["rt2"].link_enable("eth-rt1", enabled=True)
+
+ router_compare_json_output(
+ "rt1", "show ip route isis json", "step3/show_ip_route_healthy.ref"
+ )
+ router_compare_json_output(
+ "rt1", "show ipv6 route isis json", "step3/show_ipv6_route_healthy.ref"
+ )
+ router_compare_json_output(
+ "rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
+ )
+
+
+def test_bfd_isis_interface_failure_rt3_step3():
+ logger.info("Test (step 2): check failover handling when RT2 goes down")
+ tgen = get_topogen()
+
+ # Skip if previous fatal error condition is raised
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ # Let's kill the interface on rt3 and see what happens with the RIB and BFD on rt1
+ tgen.gears["rt3"].link_enable("eth-rt1", enabled=False)
+
+ # By default BFD provides a recovery time of 900ms plus jitter, so let's wait
+ # initial 2 seconds to let the CI not suffer.
+ # TODO: add check for array size
+ sleep(2)
+ router_compare_json_output(
+ "rt1", "show ip route isis json", "step3/show_ip_route_rt3_down.ref", 1, 0
+ )
+ router_compare_json_output(
+ "rt1", "show ipv6 route isis json", "step3/show_ipv6_route_rt3_down.ref", 1, 0
+ )
+ router_compare_json_output(
+ "rt1", "show bfd peers json", "step3/show_bfd_peers_rt3_down.ref", 1, 0
+ )
+
+ # Check recovery, this can take some time
+ tgen.gears["rt3"].link_enable("eth-rt1", enabled=True)
+
+ router_compare_json_output(
+ "rt1", "show ip route isis json", "step3/show_ip_route_healthy.ref"
+ )
+ router_compare_json_output(
+ "rt1", "show ipv6 route isis json", "step3/show_ipv6_route_healthy.ref"
+ )
+ router_compare_json_output(
+ "rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
+ )
+
+
+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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