1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_set_aspath_replace.py
#
# Copyright (c) 2022 by
# Donatas Abraitis <donatas.abraitis@gmail.com>
#
"""
Test if `set as-path replace` is working correctly for route-maps.
"""
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
from lib.topolog import logger
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
for routern in range(1, 5):
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(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_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_set_aspath_replace_test1():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65002 65001"}],
"172.16.255.32/32": [{"path": "65001 65001"}],
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with route-map"
def test_bgp_set_aspath_replace_test2():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("Configuring r1 to replace the matching AS with a configured ASN")
router = tgen.gears["r1"]
router.vtysh_cmd(
"configure terminal\nroute-map r2 permit 10\nset as-path replace 65003 65500\n",
isjson=False,
)
router.vtysh_cmd(
"configure terminal\nroute-map r2 permit 20\nset as-path replace any 65501\n",
isjson=False,
)
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65002 65500"}],
"172.16.255.32/32": [{"path": "65501 65501"}],
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, router)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert (
result is None
), "Failed overriding incoming AS-PATH with route-map replace with configured ASN"
def test_bgp_set_aspath_replace_access_list():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
rname = "r1"
r1 = tgen.gears[rname]
r1.vtysh_cmd(
"""
conf
bgp as-path access-list FIRST permit ^65
route-map r2 permit 20
set as-path replace as-path-access-list FIRST 65002
"""
)
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65002 65500"}],
"172.16.255.32/32": [{"path": "65002 65002"}],
}
}
def _bgp_regexp_1(router):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_regexp_1, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with regex 1 route-map"
r1.vtysh_cmd(
"""
conf
bgp as-path access-list SECOND permit 2
route-map r2 permit 10
set as-path replace as-path-access-list SECOND 65001
"""
)
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65001 65003"}],
"172.16.255.32/32": [{"path": "65002 65002"}],
}
}
test_func = functools.partial(_bgp_regexp_1, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with regex 2 route-map"
r1.vtysh_cmd(
"""
conf
bgp as-path access-list TER permit 3
route-map r2 permit 10
set as-path replace as-path-access-list TER
"""
)
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65002 65001"}],
"172.16.255.32/32": [{"path": "65002 65002"}],
}
}
test_func = functools.partial(_bgp_regexp_1, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with regex 3 route-map"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
