170 lines
4.6 KiB
Python
170 lines
4.6 KiB
Python
#!/usr/bin/env python3
|
|
# SPDX-License-Identifier: ISC
|
|
|
|
#
|
|
# test_bgp_ecmp_topo1.py
|
|
# Part of NetDEF Topology Tests
|
|
#
|
|
# Copyright (c) 2017 by
|
|
# Network Device Education Foundation, Inc. ("NetDEF")
|
|
#
|
|
|
|
"""
|
|
test_bgp_ecmp_topo1.py: Test BGP topology with ECMP (Equal Cost MultiPath).
|
|
"""
|
|
|
|
import json
|
|
import functools
|
|
import os
|
|
import sys
|
|
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]
|
|
|
|
|
|
total_ebgp_peers = 20
|
|
|
|
#####################################################
|
|
#
|
|
# Network Topology Definition
|
|
#
|
|
#####################################################
|
|
|
|
|
|
def build_topo(tgen):
|
|
router = tgen.add_router("r1")
|
|
|
|
# Setup Switches - 1 switch per 5 peering routers
|
|
for swNum in range(1, (total_ebgp_peers + 4) // 5 + 1):
|
|
switch = tgen.add_switch("s{}".format(swNum))
|
|
switch.add_link(router)
|
|
|
|
# Add 'total_ebgp_peers' number of eBGP ExaBGP neighbors
|
|
for peerNum in range(1, total_ebgp_peers + 1):
|
|
swNum = (peerNum - 1) // 5 + 1
|
|
|
|
peer_ip = "10.0.{}.{}".format(swNum, peerNum + 100)
|
|
peer_route = "via 10.0.{}.1".format(swNum)
|
|
peer = tgen.add_exabgp_peer(
|
|
"peer{}".format(peerNum), ip=peer_ip, defaultRoute=peer_route
|
|
)
|
|
|
|
switch = tgen.gears["s{}".format(swNum)]
|
|
switch.add_link(peer)
|
|
|
|
|
|
#####################################################
|
|
#
|
|
# Tests starting
|
|
#
|
|
#####################################################
|
|
|
|
|
|
def setup_module(module):
|
|
tgen = Topogen(build_topo, module.__name__)
|
|
tgen.start_topology()
|
|
|
|
# Starting Routers
|
|
router_list = tgen.routers()
|
|
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))
|
|
)
|
|
router.start()
|
|
|
|
# Starting Hosts and init ExaBGP on each of them
|
|
topotest.sleep(10, "starting BGP on all {} peers".format(total_ebgp_peers))
|
|
peer_list = tgen.exabgp_peers()
|
|
for pname, peer in peer_list.items():
|
|
peer_dir = os.path.join(CWD, pname)
|
|
env_file = os.path.join(CWD, "exabgp.env")
|
|
peer.start(peer_dir, env_file)
|
|
logger.info(pname)
|
|
|
|
|
|
def teardown_module(module):
|
|
del module
|
|
tgen = get_topogen()
|
|
tgen.stop_topology()
|
|
|
|
|
|
def test_bgp_convergence():
|
|
"Test for BGP topology convergence"
|
|
tgen = get_topogen()
|
|
|
|
# Skip if previous fatal error condition is raised
|
|
if tgen.routers_have_failure():
|
|
pytest.skip(tgen.errors)
|
|
|
|
# Expected result
|
|
router = tgen.gears["r1"]
|
|
if router.has_version("<", "3.0"):
|
|
reffile = os.path.join(CWD, "r1/summary20.txt")
|
|
else:
|
|
reffile = os.path.join(CWD, "r1/summary.txt")
|
|
|
|
expected = json.loads(open(reffile).read())
|
|
|
|
def _output_summary_cmp(router, cmd, data):
|
|
"""
|
|
Runs `cmd` that returns JSON data (normally the command ends
|
|
with 'json') and compare with `data` contents.
|
|
"""
|
|
output = router.vtysh_cmd(cmd, isjson=True)
|
|
return topotest.json_cmp(output, data)
|
|
|
|
test_func = functools.partial(
|
|
_output_summary_cmp, router, "show ip bgp summary json", expected
|
|
)
|
|
_, res = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
|
|
assertmsg = "BGP router network did not converge"
|
|
assert res is None, assertmsg
|
|
|
|
|
|
def test_bgp_ecmp():
|
|
tgen = get_topogen()
|
|
|
|
# Skip if previous fatal error condition is raised
|
|
if tgen.routers_have_failure():
|
|
pytest.skip(tgen.errors)
|
|
|
|
expect = {
|
|
"routerId": "10.0.255.1",
|
|
"routes": {},
|
|
}
|
|
|
|
for net in range(1, 5):
|
|
for subnet in range(0, 10):
|
|
netkey = "10.20{}.{}.0/24".format(net, subnet)
|
|
expect["routes"][netkey] = []
|
|
for _ in range(0, 10):
|
|
peer = {"multipath": True, "valid": True}
|
|
expect["routes"][netkey].append(peer)
|
|
|
|
test_func = functools.partial(
|
|
topotest.router_json_cmp, tgen.gears["r1"], "show ip bgp json", expect
|
|
)
|
|
_, res = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
|
|
assertmsg = 'expected multipath routes in "show ip bgp" output'
|
|
assert res is None, assertmsg
|
|
|
|
|
|
if __name__ == "__main__":
|
|
args = ["-s"] + sys.argv[1:]
|
|
sys.exit(pytest.main(args))
|