#!/usr/bin/env python # # test_isis_lsp_bits_topo1.py # Part of NetDEF Topology Tests # # Copyright (c) 2021 by Volta Networks # # 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_isis_lsp_bits_topo1.py: +---------+ | | | RT1 | | 1.1.1.1 | | L1 | +---------+ |eth-sw1 | | | +---------+ | +---------+ | | | | | | RT2 |eth-sw1 | eth-sw1| RT3 | | 2.2.2.2 +----------+----------+ 3.3.3.3 | | L1|L2 | 10.0.1.0/24 | L1|L2 | +---------+ +---------+ eth-rt4| eth-rt5| | | 10.0.2.0/24| |10.0.4.0/24 | | eth-rt2| eth-rt3| +---------+ +---------+ | | | | | RT4 | 10.0.6.0/24 | RT5 | | 4.4.4.4 +---------------------+ 5.5.5.5 | | L1|L2 |eth-rt5 eth-rt4| L1|L2 | +---------+ +---------+ eth-rt6| |eth-rt6 | | 10.0.7.0/24| |10.0.8.0/24 | +---------+ | | | | | | | RT6 | | +----------+ 6.6.6.6 +-----------+ eth-rt4| L1 |eth-rt5 +---------+ """ import os import sys import pytest import json 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. pytestmark = [pytest.mark.isisd] # Global multi-dimensional dictionary containing all expected outputs outputs = {} def build_topo(tgen): "Build function" # # Define FRR Routers # for router in ["rt1", "rt2", "rt3", "rt4", "rt5", "rt6"]: tgen.add_router(router) # # Define connections # switch = tgen.add_switch("s1") switch.add_link(tgen.gears["rt1"], nodeif="eth-sw1") switch.add_link(tgen.gears["rt2"], nodeif="eth-sw1") switch.add_link(tgen.gears["rt3"], nodeif="eth-sw1") switch = tgen.add_switch("s2") switch.add_link(tgen.gears["rt2"], nodeif="eth-rt4") switch.add_link(tgen.gears["rt4"], nodeif="eth-rt2") switch = tgen.add_switch("s4") switch.add_link(tgen.gears["rt3"], nodeif="eth-rt5") switch.add_link(tgen.gears["rt5"], nodeif="eth-rt3") switch = tgen.add_switch("s6") switch.add_link(tgen.gears["rt4"], nodeif="eth-rt5") switch.add_link(tgen.gears["rt5"], nodeif="eth-rt4") switch = tgen.add_switch("s7") switch.add_link(tgen.gears["rt4"], nodeif="eth-rt6") switch.add_link(tgen.gears["rt6"], nodeif="eth-rt4") switch = tgen.add_switch("s8") switch.add_link(tgen.gears["rt5"], nodeif="eth-rt6") switch.add_link(tgen.gears["rt6"], nodeif="eth-rt5") def setup_module(mod): "Sets up the pytest environment" tgen = Topogen(build_topo, mod.__name__) tgen.start_topology() router_list = tgen.routers() # For all registered routers, load the zebra configuration file for rname, router in router_list.items(): router.load_config( TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.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 router_compare_json_output(rname, command, reference): "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=120, wait=0.5) assertmsg = '"{}" JSON output mismatches the expected result'.format(rname) assert diff is None, assertmsg # # Step 1 # # Test initial network convergence # Attach-bit defaults to on, so expect default route pointing to L1|L2 router # def test_isis_adjacencies_step1(): logger.info("Test (step 1): check IS-IS adjacencies") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt2", "rt3", "rt4", "rt5", "rt6"]: router_compare_json_output( rname, "show yang operational-data /frr-interface:lib isisd", "step1/show_yang_interface_isis_adjacencies.ref", ) def test_rib_ipv4_step1(): logger.info("Test (step 1): verify IPv4 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt2", "rt3", "rt4", "rt5", "rt6"]: router_compare_json_output( rname, "show ip route isis json", "step1/show_ip_route.ref" ) def test_rib_ipv6_step1(): logger.info("Test (step 1): verify IPv6 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt2", "rt3", "rt4", "rt5", "rt6"]: router_compare_json_output( rname, "show ipv6 route isis json", "step1/show_ipv6_route.ref" ) # # Step 2 # # Action(s): # -Disable sending Attach bit on RT2 and RT4 # # Expected changes: # -RT1 should remove the default route pointing to RT2 # -RT6 should remove the default route pointing to RT4 # def test_rib_ipv4_step2(): logger.info("Test (step 2): verify IPv4 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) logger.info("Disabling setting the attached-bit on RT2 and RT4") tgen.net["rt2"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "no attached-bit send"' ) tgen.net["rt4"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "no attached-bit send"' ) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ip route isis json", "step2/show_ip_route.ref" ) def test_rib_ipv6_step2(): logger.info("Test (step 2): verify IPv6 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ipv6 route isis json", "step2/show_ipv6_route.ref" ) # # Step 3 # # Action(s): # -restore attach-bit, enable sending attach-bit # -disble processing a LSP with attach bit set # # Expected changes: # -RT1 and RT6 should not install a default route # def test_rib_ipv4_step3(): logger.info("Test (step 3): verify IPv4 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) logger.info("Enable setting the attached-bit on RT2 and RT4") tgen.net["rt2"].cmd('vtysh -c "conf t" -c "router isis 1" -c "attached-bit send"') tgen.net["rt4"].cmd('vtysh -c "conf t" -c "router isis 1" -c "attached-bit send"') logger.info("Disable processing received attached-bit in LSP on RT1 and RT6") tgen.net["rt1"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "attached-bit receive ignore"' ) tgen.net["rt6"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "attached-bit receive ignore"' ) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ip route isis json", "step3/show_ip_route.ref" ) def test_rib_ipv6_step3(): logger.info("Test (step 3): verify IPv6 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ipv6 route isis json", "step3/show_ipv6_route.ref" ) # # Step 4 # # Action(s): # -restore back to default attach-bit config # # Expected changes: # -RT1 and RT6 should add default route # -no changes on other routers # def test_rib_ipv4_step4(): logger.info("Test (step 4): verify IPv4 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) logger.info( "restore default processing on received attached-bit in LSP on RT1 and RT6" ) tgen.net["rt1"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "no attached-bit receive ignore"' ) tgen.net["rt6"].cmd( 'vtysh -c "conf t" -c "router isis 1" -c "no attached-bit receive ignore"' ) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ip route isis json", "step4/show_ip_route.ref" ) def test_rib_ipv6_step4(): logger.info("Test (step 4): verify IPv6 RIB") tgen = get_topogen() # Skip if previous fatal error condition is raised if tgen.routers_have_failure(): pytest.skip(tgen.errors) for rname in ["rt1", "rt6"]: router_compare_json_output( rname, "show ipv6 route isis json", "step4/show_ipv6_route.ref" ) # Memory leak test template 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))