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tests: Add a test case for sender-as-path-loop-detection

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Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
This commit is contained in:
Donatas Abraitis 2019-11-08 16:18:12 +02:00
parent 306c4dab55
commit df12a3a2ab
8 changed files with 199 additions and 0 deletions
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0
tests/topotests/bgp_sender-as-path-loop-detection/__init__.py Normal file
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tests/topotests/bgp_sender-as-path-loop-detection/r1/bgpd.conf Normal file
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! exit1
router bgp 65001
neighbor 192.168.255.1 remote-as 65002
address-family ipv4 unicast
neighbor 192.168.255.1 route-map prepend out
redistribute connected
exit-address-family
!
!
route-map prepend permit 10
set as-path prepend 65003
!

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tests/topotests/bgp_sender-as-path-loop-detection/r1/zebra.conf Normal file
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! exit1
interface lo
ip address 172.16.255.254/32
!
interface r1-eth0
ip address 192.168.255.2/30
!
ip forwarding
!

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tests/topotests/bgp_sender-as-path-loop-detection/r2/bgpd.conf Normal file
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! spine
router bgp 65002
neighbor 192.168.255.2 remote-as 65001
neighbor 192.168.255.2 solo
neighbor 192.168.254.2 remote-as 65003
neighbor 192.168.254.2 solo
neighbor 192.168.254.2 sender-as-path-loop-detection
!

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tests/topotests/bgp_sender-as-path-loop-detection/r2/zebra.conf Normal file
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! spine
interface r2-eth0
ip address 192.168.255.1/30
!
interface r2-eth1
ip address 192.168.254.1/30
!
ip forwarding
!

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tests/topotests/bgp_sender-as-path-loop-detection/r3/bgpd.conf Normal file
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! exit2
router bgp 65003
neighbor 192.168.254.1 remote-as 65002
!

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tests/topotests/bgp_sender-as-path-loop-detection/r3/zebra.conf Normal file
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! exit2
interface r3-eth0
ip address 192.168.254.2/30
!
ip forwarding
!

151
tests/topotests/bgp_sender-as-path-loop-detection/test_bgp_sender-as-path-loop-detection.py Normal file
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#!/usr/bin/env python
#
# test_bgp_sender-as-path-loop-detection.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2019 by
# Donatas Abraitis <donatas.abraitis@gmail.com>
#
# 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 if neighbor <neighbor> sender-as-path-loop-detection
command works as expeced.
"""
import os
import sys
import json
import time
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
from mininet.topo import Topo
class TemplateTopo(Topo):
def build(self, *_args, **_opts):
tgen = get_topogen(self)
for routern in range(1, 4):
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['r2'])
switch.add_link(tgen.gears['r3'])
def setup_module(mod):
tgen = Topogen(TemplateTopo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for i, (rname, router) in enumerate(router_list.iteritems(), 1):
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))
)
tgen.start_router()
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_bgp_sender_as_path_loop_detection():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router = tgen.gears['r2']
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json"))
expected = {
'192.168.255.2': {
'bgpState': 'Established',
'addressFamilyInfo': {
'ipv4Unicast': {
'acceptedPrefixCounter': 2
}
}
}
}
return topotest.json_cmp(output, expected)
def _bgp_has_route_from_r1(router):
output = json.loads(router.vtysh_cmd("show ip bgp 172.16.255.254/32 json"))
expected = {
'paths': [
{
'aspath': {
'segments': [
{
'type': 'as-sequence',
'list': [
65001,
65003
]
}
],
'length': 2
}
}
]
}
return topotest.json_cmp(output, expected)
def _bgp_suppress_route_to_r3(router):
output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.254.2 advertised-routes json"))
expected = {
'totalPrefixCounter': 0
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, router)
success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, 'Failed bgp convergence in "{}"'.format(router)
test_func = functools.partial(_bgp_has_route_from_r1, router)
success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, 'Failed to see a route from r1 in "{}"'.format(router)
test_func = functools.partial(_bgp_suppress_route_to_r3, router)
success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
assert result is None, 'Route 172.16.255.254/32 should not be sent to r3 "{}"'.format(router)
if __name__ == '__main__':
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))