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#!/usr/bin/env python
#
# test_bgp_aggregate_address_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 BGP aggregate address features.
"""
import os
import sys
import pytest
import functools
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
r1 = tgen.add_router("r1")
r2 = tgen.add_router("r2")
peer1 = tgen.add_exabgp_peer("peer1", ip="10.0.0.2", defaultRoute="via 10.0.0.1")
switch = tgen.add_switch("s1")
switch.add_link(r1)
switch.add_link(peer1)
switch = tgen.add_switch("s2")
switch.add_link(r1)
switch.add_link(r2)
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router = tgen.gears["r1"]
router.load_config(TopoRouter.RD_ZEBRA, os.path.join(CWD, "r1/zebra.conf"))
router.load_config(TopoRouter.RD_BGP, os.path.join(CWD, "r1/bgpd.conf"))
router.start()
router = tgen.gears["r2"]
router.load_config(TopoRouter.RD_ZEBRA, os.path.join(CWD, "r2/zebra.conf"))
router.load_config(TopoRouter.RD_BGP, os.path.join(CWD, "r2/bgpd.conf"))
router.start()
peer = tgen.gears["peer1"]
peer.start(os.path.join(CWD, "peer1"), os.path.join(CWD, "exabgp.env"))
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def expect_route(router_name, routes_expected):
"Helper function to avoid repeated code."
tgen = get_topogen()
test_func = functools.partial(
topotest.router_json_cmp,
tgen.gears[router_name],
"show ip route json",
routes_expected,
)
_, result = topotest.run_and_expect(test_func, None, count=120, wait=1)
assertmsg = '"{}" BGP convergence failure'.format(router_name)
assert result is None, assertmsg
def test_expect_convergence():
"Test that BGP protocol converged."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for protocols to converge")
def expect_loopback_route(router, iptype, route, proto):
"Wait until route is present on RIB for protocol."
logger.info("waiting route {} in {}".format(route, router))
test_func = functools.partial(
topotest.router_json_cmp,
tgen.gears[router],
"show {} route json".format(iptype),
{route: [{"protocol": proto}]},
)
_, result = topotest.run_and_expect(test_func, None, count=130, wait=1)
assertmsg = '"{}" BGP convergence failure'.format(router)
assert result is None, assertmsg
expect_loopback_route("r2", "ip", "10.254.254.1/32", "bgp")
expect_loopback_route("r2", "ip", "10.254.254.3/32", "bgp")
def test_bgp_aggregate_address_matching_med_only():
"Test that the command matching-MED-only works."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
routes_expected = {
# All MED matches, aggregation must exist.
"192.168.0.0/24": [{"protocol": "bgp", "metric": 0}],
"192.168.0.1/32": [{"protocol": "bgp", "metric": 10}],
"192.168.0.2/32": [{"protocol": "bgp", "metric": 10}],
"192.168.0.3/32": [{"protocol": "bgp", "metric": 10}],
# Non matching MED: aggregation must not exist.
"192.168.1.0/24": None,
"192.168.1.1/32": [{"protocol": "bgp", "metric": 10}],
"192.168.1.2/32": [{"protocol": "bgp", "metric": 10}],
"192.168.1.3/32": [{"protocol": "bgp", "metric": 20}],
}
test_func = functools.partial(
topotest.router_json_cmp,
tgen.gears["r2"],
"show ip route json",
routes_expected,
)
_, result = topotest.run_and_expect(test_func, None, count=20, wait=1)
assertmsg = '"r2" BGP convergence failure'
assert result is None, assertmsg
def test_bgp_aggregate_address_match_and_suppress():
"Test that the command matching-MED-only with suppression works."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
tgen.gears["r1"].vtysh_multicmd(
"""
configure terminal
router bgp 65000
address-family ipv4 unicast
no aggregate-address 192.168.0.0/24 matching-MED-only
no aggregate-address 192.168.1.0/24 matching-MED-only
aggregate-address 192.168.0.0/24 matching-MED-only summary-only
aggregate-address 192.168.1.0/24 matching-MED-only summary-only
"""
)
routes_expected = {
# All MED matches, aggregation must exist.
"192.168.0.0/24": [{"protocol": "bgp", "metric": 0}],
"192.168.0.1/32": None,
"192.168.0.2/32": None,
"192.168.0.3/32": None,
# Non matching MED: aggregation must not exist.
"192.168.1.0/24": None,
"192.168.1.1/32": [{"protocol": "bgp", "metric": 10}],
"192.168.1.2/32": [{"protocol": "bgp", "metric": 10}],
"192.168.1.3/32": [{"protocol": "bgp", "metric": 20}],
}
test_func = functools.partial(
topotest.router_json_cmp,
tgen.gears["r2"],
"show ip route json",
routes_expected,
)
_, result = topotest.run_and_expect(test_func, None, count=120, wait=1)
assertmsg = '"r2" BGP convergence failure'
assert result is None, assertmsg
def test_bgp_aggregate_address_suppress_map():
"Test that the command suppress-map works."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
expect_route(
"r2",
{
"192.168.2.0/24": [{"protocol": "bgp"}],
"192.168.2.1/32": None,
"192.168.2.2/32": [{"protocol": "bgp"}],
"192.168.2.3/32": [{"protocol": "bgp"}],
},
)
# Change route map and test again.
tgen.gears["r1"].vtysh_multicmd(
"""
configure terminal
router bgp 65000
address-family ipv4 unicast
no aggregate-address 192.168.2.0/24 suppress-map rm-sup-one
aggregate-address 192.168.2.0/24 suppress-map rm-sup-two
"""
)
expect_route(
"r2",
{
"192.168.2.0/24": [{"protocol": "bgp"}],
"192.168.2.1/32": [{"protocol": "bgp"}],
"192.168.2.2/32": None,
"192.168.2.3/32": [{"protocol": "bgp"}],
},
)
def test_bgp_aggregate_address_suppress_map_update_route_map():
"Test that the suppress-map late route map creation works."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
tgen.gears["r1"].vtysh_multicmd(
"""
configure terminal
router bgp 65000
address-family ipv4 unicast
no aggregate-address 192.168.2.0/24 suppress-map rm-sup-two
aggregate-address 192.168.2.0/24 suppress-map rm-sup-three
"""
)
expect_route(
"r2",
{
"192.168.2.0/24": [{"protocol": "bgp"}],
"192.168.2.1/32": [{"protocol": "bgp"}],
"192.168.2.2/32": [{"protocol": "bgp"}],
"192.168.2.3/32": [{"protocol": "bgp"}],
},
)
# Create missing route map and test again.
tgen.gears["r1"].vtysh_multicmd(
"""
configure terminal
route-map rm-sup-three permit 10
match ip address acl-sup-three
"""
)
expect_route(
"r2",
{
"192.168.2.0/24": [{"protocol": "bgp"}],
"192.168.2.1/32": [{"protocol": "bgp"}],
"192.168.2.2/32": [{"protocol": "bgp"}],
"192.168.2.3/32": None,
},
)
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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