263 lines
8.5 KiB
Python
263 lines
8.5 KiB
Python
#!/usr/bin/env python
|
|
# SPDX-License-Identifier: ISC
|
|
|
|
#
|
|
# Copyright (c) 2022 by
|
|
# Donatas Abraitis <donatas@opensourcerouting.org>
|
|
#
|
|
|
|
"""
|
|
r7 sets aigp-metric for 10.0.0.71/32 to 71, and 72 for 10.0.0.72/32.
|
|
|
|
r6 receives those routes with aigp-metric TLV.
|
|
|
|
r2 and r3 receives those routes with aigp-metric TLV increased by 20,
|
|
and 10 appropriately.
|
|
|
|
r1 receives routes with aigp-metric TLV 81, 91 and 82, 92 respectively.
|
|
"""
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
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
|
|
|
|
pytestmark = [pytest.mark.bgpd]
|
|
|
|
|
|
def build_topo(tgen):
|
|
for routern in range(1, 8):
|
|
tgen.add_router("r{}".format(routern))
|
|
|
|
switch = tgen.add_switch("s1")
|
|
switch.add_link(tgen.gears["r1"])
|
|
switch.add_link(tgen.gears["r2"])
|
|
|
|
switch = tgen.add_switch("s2")
|
|
switch.add_link(tgen.gears["r1"])
|
|
switch.add_link(tgen.gears["r3"])
|
|
|
|
switch = tgen.add_switch("s3")
|
|
switch.add_link(tgen.gears["r2"])
|
|
switch.add_link(tgen.gears["r4"])
|
|
|
|
switch = tgen.add_switch("s4")
|
|
switch.add_link(tgen.gears["r3"])
|
|
switch.add_link(tgen.gears["r5"])
|
|
|
|
switch = tgen.add_switch("s5")
|
|
switch.add_link(tgen.gears["r4"])
|
|
switch.add_link(tgen.gears["r6"])
|
|
|
|
switch = tgen.add_switch("s6")
|
|
switch.add_link(tgen.gears["r5"])
|
|
switch.add_link(tgen.gears["r6"])
|
|
|
|
switch = tgen.add_switch("s7")
|
|
switch.add_link(tgen.gears["r6"])
|
|
switch.add_link(tgen.gears["r7"])
|
|
|
|
|
|
def setup_module(mod):
|
|
tgen = Topogen(build_topo, mod.__name__)
|
|
tgen.start_topology()
|
|
|
|
router_list = tgen.routers()
|
|
|
|
for _, (rname, router) in enumerate(router_list.items(), 1):
|
|
router.load_config(
|
|
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
|
|
)
|
|
router.load_config(
|
|
TopoRouter.RD_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
|
|
)
|
|
router.load_config(
|
|
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
|
|
)
|
|
|
|
tgen.start_router()
|
|
|
|
|
|
def teardown_module(mod):
|
|
tgen = get_topogen()
|
|
tgen.stop_topology()
|
|
|
|
|
|
def test_bgp_aigp():
|
|
tgen = get_topogen()
|
|
|
|
if tgen.routers_have_failure():
|
|
pytest.skip(tgen.errors)
|
|
|
|
r1 = tgen.gears["r1"]
|
|
r2 = tgen.gears["r2"]
|
|
r3 = tgen.gears["r3"]
|
|
r4 = tgen.gears["r4"]
|
|
r5 = tgen.gears["r5"]
|
|
|
|
def _bgp_converge():
|
|
output = json.loads(r1.vtysh_cmd("show bgp ipv4 unicast 10.0.0.71/32 json"))
|
|
expected = {
|
|
"paths": [
|
|
{
|
|
"aigpMetric": 81,
|
|
"valid": True,
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.3",
|
|
"hostname": "r3",
|
|
"metric": 30,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
{
|
|
"aigpMetric": 91,
|
|
"valid": True,
|
|
"bestpath": {"selectionReason": "IGP Metric"},
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.2",
|
|
"hostname": "r2",
|
|
"metric": 10,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
]
|
|
}
|
|
return topotest.json_cmp(output, expected)
|
|
|
|
def _bgp_check_aigp_metric(router, prefix, aigp):
|
|
output = json.loads(
|
|
router.vtysh_cmd("show bgp ipv4 unicast {} json".format(prefix))
|
|
)
|
|
expected = {"paths": [{"aigpMetric": aigp, "valid": True}]}
|
|
return topotest.json_cmp(output, expected)
|
|
|
|
def _bgp_check_aigp_metric_bestpath():
|
|
output = json.loads(
|
|
r1.vtysh_cmd(
|
|
"show bgp ipv4 unicast 10.0.0.64/28 longer-prefixes json detail"
|
|
)
|
|
)
|
|
expected = {
|
|
"routes": {
|
|
"10.0.0.71/32": {
|
|
"paths": [
|
|
{
|
|
"aigpMetric": 81,
|
|
"valid": True,
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.3",
|
|
"hostname": "r3",
|
|
"metric": 30,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
{
|
|
"aigpMetric": 91,
|
|
"valid": True,
|
|
"bestpath": {"selectionReason": "AIGP"},
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.2",
|
|
"hostname": "r2",
|
|
"metric": 10,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
],
|
|
},
|
|
"10.0.0.72/32": {
|
|
"paths": [
|
|
{
|
|
"aigpMetric": 82,
|
|
"valid": True,
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.3",
|
|
"hostname": "r3",
|
|
"metric": 30,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
{
|
|
"aigpMetric": 92,
|
|
"valid": True,
|
|
"bestpath": {"selectionReason": "AIGP"},
|
|
"nexthops": [
|
|
{
|
|
"ip": "10.0.0.2",
|
|
"hostname": "r2",
|
|
"metric": 10,
|
|
"accessible": True,
|
|
}
|
|
],
|
|
},
|
|
],
|
|
},
|
|
}
|
|
}
|
|
return topotest.json_cmp(output, expected)
|
|
|
|
# Initial converge, AIGP is not involved in best-path selection process
|
|
test_func = functools.partial(_bgp_converge)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "can't converge initially"
|
|
|
|
# Enable `bgp bestpath aigp`
|
|
r1.vtysh_cmd(
|
|
"""
|
|
configure terminal
|
|
router bgp
|
|
bgp bestpath aigp
|
|
"""
|
|
)
|
|
|
|
# r4, 10.0.6.6/32 with aigp-metric 20
|
|
test_func = functools.partial(_bgp_check_aigp_metric, r4, "10.0.6.6/32", 20)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "aigp-metric for 10.0.6.6/32 is not 20"
|
|
|
|
# r4, 10.0.0.71/32 with aigp-metric 71
|
|
test_func = functools.partial(_bgp_check_aigp_metric, r4, "10.0.0.71/32", 71)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "aigp-metric for 10.0.0.71/32 is not 71"
|
|
|
|
# r5, 10.0.0.72/32 with aigp-metric 72
|
|
test_func = functools.partial(_bgp_check_aigp_metric, r5, "10.0.0.72/32", 72)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "aigp-metric for 10.0.0.72/32 is not 72"
|
|
|
|
# r2, 10.0.0.71/32 with aigp-metric 101 (71 + 20)
|
|
test_func = functools.partial(_bgp_check_aigp_metric, r2, "10.0.0.71/32", 91)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "aigp-metric for 10.0.0.71/32 is not 91"
|
|
|
|
# r3, 10.0.0.72/32 with aigp-metric 92 (72 + 10)
|
|
test_func = functools.partial(_bgp_check_aigp_metric, r3, "10.0.0.72/32", 82)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "aigp-metric for 10.0.0.72/32 is not 82"
|
|
|
|
# r1, check if AIGP is considered in best-path selection (lowest wins: aigp + nexthop-metric)
|
|
test_func = functools.partial(_bgp_check_aigp_metric_bestpath)
|
|
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
|
|
assert result is None, "AIGP attribute is not considered in best-path selection"
|
|
|
|
|
|
if __name__ == "__main__":
|
|
args = ["-s"] + sys.argv[1:]
|
|
sys.exit(pytest.main(args))
|