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
|
#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# Copyright (c) 2024, Palo Alto Networks, Inc.
# Enke Chen <enchen@paloaltonetworks.com>
#
"""
r1, r2, and r3 are directly connectd to each other.
r4 is only connected to r1 directly.
r1 is the route reflector.
r1 sets the nexthop to itself when advertising routes to r4.
r2 sources 10.0.2.2/32 with agigp-metric 2.
Results:
r1, r2 and r3 should have aigp-meric 2.
r4 should have aigp-metric 12, i.e., aigp + nexthop-metric.
"""
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, 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["r1"])
switch.add_link(tgen.gears["r3"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r4"])
switch = tgen.add_switch("s4")
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_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_rr():
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"]
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_bestpath():
output = json.loads(r1.vtysh_cmd("show bgp ipv4 unicast 10.0.1.2/32 json"))
expected = {
"prefix": "10.0.1.2/32",
"paths": [
{
"aigpMetric": 50,
"valid": True,
"sourced": True,
"local": True,
"bestpath": {"overall": True, "selectionReason": "Local Route"},
"nexthops": [
{
"ip": "0.0.0.0",
"hostname": "r1",
"afi": "ipv4",
"metric": 0,
"accessible": True,
"used": True,
}
],
},
{
"aigpMetric": 10,
"valid": True,
"nexthops": [
{
"ip": "10.0.0.2",
"hostname": "r2",
"afi": "ipv4",
"metric": 10,
"accessible": True,
"used": True,
}
],
},
],
}
return topotest.json_cmp(output, expected)
# r2, 10.0.2.2/32 with aigp-metric 2
test_func = functools.partial(_bgp_check_aigp_metric, r2, "10.0.2.2/32", 2)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assert result is None, "aigp-metric for 10.0.2.2/32 is not 2"
# r1, 10.0.2.2/32 with aigp-metric 2
test_func = functools.partial(_bgp_check_aigp_metric, r1, "10.0.2.2/32", 2)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assert result is None, "aigp-metric for 10.0.2.2/32 is not 2"
# r3, 10.0.2.2/32 with aigp-metric 2
test_func = functools.partial(_bgp_check_aigp_metric, r3, "10.0.2.2/32", 2)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assert result is None, "aigp-metric for 10.0.2.2/32 is not 2"
# r4, 10.0.2.2/32 with aigp-metric 12: aigp + nexthop-metric
test_func = functools.partial(_bgp_check_aigp_metric, r4, "10.0.2.2/32", 12)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assert result is None, "aigp-metric for 10.0.2.2/32 is not 12"
# r1, check if the local route is favored over AIGP comparison
test_func = functools.partial(_bgp_check_aigp_bestpath)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assert result is None, "Local route is not favored over AIGP in best-path selection"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
