--- /dev/null
+#!/usr/bin/env python
+#
+# test_bgp_lu2.py
+#
+# Part of FRR/NetDEF Topology Tests
+#
+# Copyright (c) 2020 by Volta Networks
+# Copyright (c) 2021 by Nvidia, Inc.
+#
+# 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_bgp_lu2.py: Test BGP LU label allocation
+"""
+
+import os
+import sys
+import json
+from functools import partial
+import pytest
+
+# 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.bgpd]
+
+#
+# Basic scenario for BGP-LU. Nodes are directly connected.
+# Node 3 is advertising routes to 2, which advertises them
+# as BGP-LU to 1; this way we get routes with actual labels, as
+# opposed to implicit-null routes in the 2-node case.
+#
+# R2 is an LER, with MPLS towards R1, and IP towards R3. R1 is an LSR, with
+# MPLS on both sides.
+#
+#
+# AS4 BGP-LU AS1 BGP-LU AS2 iBGP AS2
+# +-----+ +-----+ +-----+ +-----+
+# | |.4 .1| |.1 .2| |.2 .3| |
+# | 4 +-------------+ 1 +----------------+ 2 +-----------------+ 3 |
+# | | 10.0.4.0/24 | | 10.0.0.0/24 | | 10.0.1.0/24 | |
+# +-----+ +-----+ +-----+ +-----+
+#
+#
+
+
+def build_topo(tgen):
+ "Build function"
+
+ # This function's only purpose is to define allocation and relationship
+ # between routers, switches and hosts.
+ #
+ #
+ # Create routers
+ tgen.add_router("R1")
+ tgen.add_router("R2")
+ tgen.add_router("R3")
+ tgen.add_router("R4")
+
+ # R1-R2
+ switch = tgen.add_switch("s1")
+ switch.add_link(tgen.gears["R1"])
+ switch.add_link(tgen.gears["R2"])
+
+ # R2-R3
+ switch = tgen.add_switch("s2")
+ switch.add_link(tgen.gears["R2"])
+ switch.add_link(tgen.gears["R3"])
+
+ # R1-R4
+ switch = tgen.add_switch("s3")
+ switch.add_link(tgen.gears["R1"])
+ switch.add_link(tgen.gears["R4"])
+
+
+def setup_module(mod):
+ "Sets up the pytest environment"
+ # This function initiates the topology build with Topogen...
+ tgen = Topogen(build_topo, mod.__name__)
+
+ # Skip if no mpls support
+ if not tgen.hasmpls:
+ logger.info("MPLS is not available, skipping test")
+ pytest.skip("MPLS is not available, skipping")
+ return
+
+ # ... and here it calls Mininet initialization functions.
+ tgen.start_topology()
+
+ # This is a sample of configuration loading.
+ router_list = tgen.routers()
+
+ # Enable mpls input for routers, so we can ping
+ sval = "net.mpls.conf.{}.input"
+ topotest.sysctl_assure(router_list["R2"], sval.format("R2-eth0"), 1)
+ topotest.sysctl_assure(router_list["R1"], sval.format("R1-eth0"), 1)
+ topotest.sysctl_assure(router_list["R1"], sval.format("R1-eth1"), 1)
+ topotest.sysctl_assure(router_list["R4"], sval.format("R4-eth0"), 1)
+
+ # 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_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
+ )
+
+ # Have static config for R3 too
+ if router == router_list["R3"]:
+ router.load_config(
+ TopoRouter.RD_STATIC, os.path.join(CWD, "{}/staticd.conf".format(rname))
+ )
+
+ # After loading the configurations, this function loads configured daemons.
+ 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 check_labelpool(router):
+ json_file = "{}/{}/labelpool.summ.json".format(CWD, router.name)
+ expected = json.loads(open(json_file).read())
+
+ test_func = partial(
+ topotest.router_json_cmp, router, "show bgp labelpool summary json", expected
+ )
+ _, result = topotest.run_and_expect(test_func, None, count=20, wait=1)
+ assertmsg = '"{}" JSON output mismatches - Did not converge'.format(router.name)
+ assert result is None, assertmsg
+
+
+def test_converge_bgplu():
+ "Wait for protocol convergence"
+
+ tgen = get_topogen()
+ # Don't run this test if we have any failure.
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ # TODO -- enable for debugging
+ # tgen.mininet_cli()
+
+ r1 = tgen.gears["R1"]
+ r2 = tgen.gears["R2"]
+
+ check_labelpool(r1)
+ check_labelpool(r2)
+
+
+def test_ping():
+ "Simple ping tests"
+
+ tgen = get_topogen()
+
+ # Don't run this test if we have any failure.
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ #
+ logger.info("Ping from R2 to R3")
+ router = tgen.gears["R2"]
+ output = router.run("ping -c 4 -w 4 {}".format("10.0.1.3"))
+ assert " 0% packet loss" in output, "Ping R2->R3 FAILED"
+ logger.info("Ping from R2 to R3 ... success")
+
+ #
+ logger.info("Ping from R4 to R2")
+ router = tgen.gears["R4"]
+ output = router.run("ping -c 4 -w 4 {}".format("10.0.0.2"))
+ assert " 0% packet loss" in output, "Ping R4->R2 FAILED"
+ logger.info("Ping from R4 to R2 ... success")
+
+ #
+ logger.info("Ping from R4 to R3")
+ router = tgen.gears["R4"]
+ output = router.run("ping -c 4 -w 4 {}".format("10.0.1.3"))
+ assert " 0% packet loss" in output, "Ping R4->R3 FAILED"
+ logger.info("Ping from R4 to R3 ... success")
+
+
+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))
projects / matthieu / frr.git / commitdiff