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5 # Part of NetDEF Topology Tests
7 # Copyright (c) 2018 by
8 # Network Device Education Foundation, Inc. ("NetDEF")
10 # Permission to use, copy, modify, and/or distribute this software
11 # for any purpose with or without fee is hereby granted, provided
12 # that the above copyright notice and this permission notice appear
15 # THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
16 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
18 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
19 # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
21 # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
26 test_bfd_topo1.py: Test the FRR BFD daemon.
32 from functools
import partial
35 # Save the Current Working Directory to find configuration files.
36 CWD
= os
.path
.dirname(os
.path
.realpath(__file__
))
37 sys
.path
.append(os
.path
.join(CWD
, "../"))
39 # pylint: disable=C0413
40 # Import topogen and topotest helpers
41 from lib
import topotest
42 from lib
.topogen
import Topogen
, TopoRouter
, get_topogen
43 from lib
.topolog
import logger
45 # Required to instantiate the topology builder class.
46 from mininet
.topo
import Topo
48 pytestmark
= [pytest
.mark
.bfdd
, pytest
.mark
.bgpd
]
52 "Test topology builder"
54 def build(self
, *_args
, **_opts
):
56 tgen
= get_topogen(self
)
59 for routern
in range(1, 5):
60 tgen
.add_router("r{}".format(routern
))
62 switch
= tgen
.add_switch("s1")
63 switch
.add_link(tgen
.gears
["r1"])
64 switch
.add_link(tgen
.gears
["r2"])
66 switch
= tgen
.add_switch("s2")
67 switch
.add_link(tgen
.gears
["r2"])
68 switch
.add_link(tgen
.gears
["r3"])
70 switch
= tgen
.add_switch("s3")
71 switch
.add_link(tgen
.gears
["r2"])
72 switch
.add_link(tgen
.gears
["r4"])
75 def setup_module(mod
):
76 "Sets up the pytest environment"
77 tgen
= Topogen(BFDTopo
, mod
.__name
__)
80 router_list
= tgen
.routers()
81 for rname
, router
in router_list
.items():
83 TopoRouter
.RD_ZEBRA
, os
.path
.join(CWD
, "{}/zebra.conf".format(rname
))
86 TopoRouter
.RD_BFD
, os
.path
.join(CWD
, "{}/bfdd.conf".format(rname
))
89 TopoRouter
.RD_BGP
, os
.path
.join(CWD
, "{}/bgpd.conf".format(rname
))
92 # Initialize all routers.
95 # Verify that we are using the proper version and that the BFD
97 for router
in router_list
.values():
99 if router
.has_version("<", "5.1"):
100 tgen
.set_error("Unsupported FRR version")
104 def teardown_module(_mod
):
105 "Teardown the pytest environment"
110 def test_bfd_connection():
111 "Assert that the BFD peers can find themselves."
113 if tgen
.routers_have_failure():
114 pytest
.skip(tgen
.errors
)
116 logger
.info("waiting for bfd peers to go up")
118 for router
in tgen
.routers().values():
119 json_file
= "{}/{}/peers.json".format(CWD
, router
.name
)
120 expected
= json
.loads(open(json_file
).read())
123 topotest
.router_json_cmp
, router
, "show bfd peers json", expected
125 _
, result
= topotest
.run_and_expect(test_func
, None, count
=8, wait
=0.5)
126 assertmsg
= '"{}" JSON output mismatches'.format(router
.name
)
127 assert result
is None, assertmsg
130 def test_bgp_convergence():
131 "Assert that BGP is converging."
133 if tgen
.routers_have_failure():
134 pytest
.skip(tgen
.errors
)
136 logger
.info("waiting for bgp peers to go up")
138 for router
in tgen
.routers().values():
139 ref_file
= "{}/{}/bgp_summary.json".format(CWD
, router
.name
)
140 expected
= json
.loads(open(ref_file
).read())
142 topotest
.router_json_cmp
, router
, "show ip bgp summary json", expected
144 _
, res
= topotest
.run_and_expect(test_func
, None, count
=125, wait
=1.0)
145 assertmsg
= "{}: bgp did not converge".format(router
.name
)
146 assert res
is None, assertmsg
149 def test_bgp_fast_convergence():
150 "Assert that BGP is converging before setting a link down."
152 if tgen
.routers_have_failure():
153 pytest
.skip(tgen
.errors
)
155 logger
.info("waiting for bgp peers converge")
157 for router
in tgen
.routers().values():
158 ref_file
= "{}/{}/bgp_prefixes.json".format(CWD
, router
.name
)
159 expected
= json
.loads(open(ref_file
).read())
161 topotest
.router_json_cmp
, router
, "show ip bgp json", expected
163 _
, res
= topotest
.run_and_expect(test_func
, None, count
=40, wait
=0.5)
164 assertmsg
= "{}: bgp did not converge".format(router
.name
)
165 assert res
is None, assertmsg
168 def test_bfd_fast_convergence():
170 Assert that BFD notices the link down after simulating network
174 if tgen
.routers_have_failure():
175 pytest
.skip(tgen
.errors
)
177 # Disable r1-eth0 link.
178 tgen
.gears
["r1"].link_enable("r1-eth0", enabled
=False)
180 # Wait the minimum time we can before checking that BGP/BFD
182 logger
.info("waiting for BFD converge")
184 # Check that BGP converged quickly.
185 for router
in tgen
.routers().values():
186 json_file
= "{}/{}/peers.json".format(CWD
, router
.name
)
187 expected
= json
.loads(open(json_file
).read())
189 # Load the same file as previous test, but expect R1 to be down.
190 if router
.name
== "r1":
191 for peer
in expected
:
192 if peer
["peer"] == "192.168.0.2":
193 peer
["status"] = "down"
195 for peer
in expected
:
196 if peer
["peer"] == "192.168.0.1":
197 peer
["status"] = "down"
200 topotest
.router_json_cmp
, router
, "show bfd peers json", expected
202 _
, res
= topotest
.run_and_expect(test_func
, None, count
=20, wait
=0.5)
203 assertmsg
= '"{}" JSON output mismatches'.format(router
.name
)
204 assert res
is None, assertmsg
207 def test_bgp_fast_reconvergence():
208 "Assert that BGP is converging after setting a link down."
210 if tgen
.routers_have_failure():
211 pytest
.skip(tgen
.errors
)
213 logger
.info("waiting for BGP re convergence")
215 # Check that BGP converged quickly.
216 for router
in tgen
.routers().values():
217 ref_file
= "{}/{}/bgp_prefixes.json".format(CWD
, router
.name
)
218 expected
= json
.loads(open(ref_file
).read())
220 # Load the same file as previous test, but set networks to None
222 if router
.name
== "r1":
223 expected
["routes"]["10.254.254.2/32"] = None
224 expected
["routes"]["10.254.254.3/32"] = None
225 expected
["routes"]["10.254.254.4/32"] = None
227 expected
["routes"]["10.254.254.1/32"] = None
230 topotest
.router_json_cmp
, router
, "show ip bgp json", expected
232 _
, res
= topotest
.run_and_expect(test_func
, None, count
=3, wait
=1)
233 assertmsg
= "{}: bgp did not converge".format(router
.name
)
234 assert res
is None, assertmsg
237 def test_memory_leak():
238 "Run the memory leak test and report results."
240 if not tgen
.is_memleak_enabled():
241 pytest
.skip("Memory leak test/report is disabled")
243 tgen
.report_memory_leaks()
246 if __name__
== "__main__":
247 args
= ["-s"] + sys
.argv
[1:]
248 sys
.exit(pytest
.main(args
))