1 AT_BANNER([Spanning Tree Protocol unit tests])
3 AT_SETUP([STP example from IEEE 802.1D-1998])
5 AT_DATA([test-stp-ieee802.1d-1998],
7 bridge 1 0x97 = c:5 a d:5
9 bridge 3 0x57 = b:5 e:5
10 bridge 4 0x83 = a:5 e:5
18 AT_CHECK([ovstest test-stp test-stp-ieee802.1d-1998], [0], [], [dnl
19 stp|INFO|stp42: detected topology change.
20 stp|INFO|stp42: detected topology change.
21 stp|INFO|stp97: detected topology change.
22 stp|INFO|stp97: detected topology change.
23 stp|INFO|stp97: detected topology change.
27 AT_SETUP([STP example from IEEE 802.1D-2004 figures 17.4 and 17.5])
29 AT_DATA([test-stp-ieee802.1d-2004-fig17.4],
30 [bridge 0 0x111 = a b e c
31 bridge 1 0x222 = a b d f
32 bridge 2 0x333 = c d l j h g
33 bridge 3 0x444 = e f n m k i
34 bridge 4 0x555 = g i 0 0
35 bridge 5 0x666 = h k 0 0
36 bridge 6 0x777 = j m 0 0
37 bridge 7 0x888 = l n 0 0
41 check 2 = F:10 B F F F F
42 check 3 = F:10 B F F F F
48 # Now connect two ports of bridge 7 to the same LAN.
50 # Same results except for bridge 7:
54 check 2 = F:10 B F F F F
55 check 3 = F:10 B F F F F
61 AT_CHECK([ovstest test-stp test-stp-ieee802.1d-2004-fig17.4], [0], [], [dnl
62 stp|INFO|stp111: detected topology change.
63 stp|INFO|stp111: detected topology change.
64 stp|INFO|stp111: detected topology change.
65 stp|INFO|stp111: detected topology change.
66 stp|INFO|stp222: detected topology change.
70 AT_SETUP([STP example from IEEE 802.1D-2004 figure 17.6])
72 AT_DATA([test-stp-ieee802.1d-2004-fig17.6],
73 [bridge 0 0x111 = a b l
74 bridge 1 0x222 = b c d
75 bridge 2 0x333 = d e f
76 bridge 3 0x444 = f g h
77 bridge 4 0x555 = j h i
78 bridge 5 0x666 = l j k
87 AT_CHECK([ovstest test-stp test-stp-ieee802.1d-2004-fig17.6], [0], [], [dnl
88 stp|INFO|stp111: detected topology change.
89 stp|INFO|stp111: detected topology change.
90 stp|INFO|stp111: detected topology change.
91 stp|INFO|stp222: detected topology change.
92 stp|INFO|stp222: detected topology change.
96 AT_SETUP([STP example from IEEE 802.1D-2004 figure 17.7])
98 AT_DATA([test-stp-ieee802.1d-2004-fig17.7],
100 bridge 1 0x111 = a b d f h g e c
101 bridge 2 0x222 = g h j l n m k i
104 check 1 = F F:10 F F F F F F
105 check 2 = B F:20 F F F F F F
107 # This is not the port priority change described in that figure,
108 # but I don't understand what port priority change would cause
110 bridge 2 = g X j l n m k i
113 check 1 = F F:10 F F F F F F
114 check 2 = F:20 D F F F F F F
116 AT_CHECK([ovstest test-stp test-stp-ieee802.1d-2004-fig17.7], [0], [], [dnl
117 stp|INFO|stpaa: detected topology change.
118 stp|INFO|stp111: detected topology change.
119 stp|INFO|stp111: detected topology change.
120 stp|INFO|stp111: detected topology change.
121 stp|INFO|stp111: detected topology change.
125 AT_SETUP([STP.io.1.1: Link Failure])
127 AT_DATA([test-stp-iol-io-1.1],
128 [# This test file approximates the following test from "Bridge
129 # Functions Consortium Spanning Tree Interoperability Test Suite
132 # STP.io.1.1: Link Failure
133 bridge 0 0x111 = a b c
134 bridge 1 0x222 = a b c
155 AT_CHECK([ovstest test-stp test-stp-iol-io-1.1], [0], [], [dnl
156 stp|INFO|stp111: detected topology change.
157 stp|INFO|stp111: detected topology change.
158 stp|INFO|stp111: detected topology change.
159 stp|INFO|stp222: detected topology change.
160 stp|INFO|stp111: detected topology change.
164 AT_SETUP([STP.io.1.2: Repeated Network])
166 AT_DATA([test-stp-iol-io-1.2],
167 [# This test file approximates the following test from "Bridge
168 # Functions Consortium Spanning Tree Interoperability Test Suite
170 # STP.io.1.2: Repeated Network
174 check 0 = rootid:0x111 F B
175 check 1 = rootid:0x111 F:10 B
178 check 0 = rootid:0x111 F B
179 check 1 = rootid:0x111 B F:10
181 AT_CHECK([ovstest test-stp test-stp-iol-io-1.2], [0], [], [dnl
182 stp|INFO|stp111: detected topology change.
183 stp|INFO|stp222: detected topology change.
184 stp|INFO|stp111: detected topology change.
188 AT_SETUP([STP.io.1.4: Network Initialization])
190 AT_DATA([test-stp-iol-io-1.4],
191 [# This test file approximates the following test from "Bridge
192 # Functions Consortium Spanning Tree Interoperability Test Suite
194 # STP.io.1.4: Network Initialization
195 bridge 0 0x111 = a b c
196 bridge 1 0x222 = b d e
197 bridge 2 0x333 = a d f
198 bridge 3 0x444 = c e f
205 AT_CHECK([ovstest test-stp test-stp-iol-io-1.4], [0], [], [dnl
206 stp|INFO|stp111: detected topology change.
207 stp|INFO|stp111: detected topology change.
208 stp|INFO|stp111: detected topology change.
209 stp|INFO|stp222: detected topology change.
210 stp|INFO|stp222: detected topology change.
214 AT_SETUP([STP.io.1.5: Topology Change])
216 AT_DATA([test-stp-iol-io-1.5],
217 [# This test file approximates the following test from "Bridge
218 # Functions Consortium Spanning Tree Interoperability Test Suite
220 # STP.io.1.5: Topology Change
221 bridge 0 0x111 = a b d c
222 bridge 1 0x222 = a b f e
223 bridge 2 0x333 = c d g h
224 bridge 3 0x444 = e f g h
258 AT_CHECK([ovstest test-stp test-stp-iol-io-1.5], [0], [], [dnl
259 stp|INFO|stp111: detected topology change.
260 stp|INFO|stp111: detected topology change.
261 stp|INFO|stp111: detected topology change.
262 stp|INFO|stp111: detected topology change.
263 stp|INFO|stp222: detected topology change.
267 AT_SETUP([STP.op.1.1 and STP.op.1.2])
269 AT_DATA([test-stp-iol-op-1.1],
270 [# This test file approximates the following tests from "Bridge
271 # Functions Consortium Spanning Tree Protocol Operations Test Suite
273 # Test STP.op.1.1: Root ID Initialized to Bridge ID
274 # Test STP.op.1.2: Root Path Cost Initialized to Zero
278 AT_CHECK([ovstest test-stp test-stp-iol-op-1.1])
281 AT_SETUP([STP.op.1.4: All Ports Initialized to Designated Ports])
283 AT_DATA([test-stp-iol-op-1.4],
284 [# This test file approximates the following test from "Bridge
285 # Functions Consortium Spanning Tree Protocol Operations Test Suite
287 # Test STP.op.1.4: All Ports Initialized to Designated Ports
288 bridge 0 0x123 = a b c d e f
289 check 0 = Li Li Li Li Li Li
291 check 0 = F F F F F F
293 AT_CHECK([ovstest test-stp test-stp-iol-op-1.4], [0], [], [dnl
294 stp|INFO|stp123: detected topology change.
295 stp|INFO|stp123: detected topology change.
296 stp|INFO|stp123: detected topology change.
297 stp|INFO|stp123: detected topology change.
298 stp|INFO|stp123: detected topology change.
302 AT_SETUP([STP.op.3.1: Root Bridge Selection: Root ID Values])
304 AT_DATA([test-stp-iol-op-3.1],
305 [# This test file approximates the following test from "Bridge
306 # Functions Consortium Spanning Tree Protocol Operations Test Suite
308 # Test STP.op.3.1: Root Bridge Selection: Root ID Values
311 check 0 = rootid:0x111 Li
312 check 1 = rootid:0x222 Li
314 check 0 = rootid:0x111 root
315 check 1 = rootid:0x111 F:10
317 AT_CHECK([ovstest test-stp test-stp-iol-op-3.1], [0], [], [dnl
318 stp|INFO|stp111: detected topology change.
322 AT_SETUP([STP.op.3.3: Root Bridge Selection: Bridge ID Values])
324 AT_DATA([test-stp-iol-op-3.3],
325 [# This test file approximates the following test from "Bridge
326 # Functions Consortium Spanning Tree Protocol Operations Test Suite
328 # Test STP.op.3.3: Root Bridge Selection: Bridge ID Values
329 bridge 0 0x333^0x6000 = a
330 bridge 1 0x222^0x7000 = b
333 check 0 = rootid:0x333^0x6000 root
334 check 1 = rootid:0x333^0x6000 F:20
335 check 2 = rootid:0x333^0x6000 F:10 F
337 AT_CHECK([ovstest test-stp test-stp-iol-op-3.3], [0], [], [dnl
338 stp|INFO|stp333: detected topology change.
339 stp|INFO|stp111: detected topology change.
340 stp|INFO|stp111: detected topology change.
341 stp|INFO|stp333: detected topology change.
345 AT_SETUP([STP.op.3.3: Root Bridge Selection: Bridge ID Values])
347 AT_DATA([test-stp-iol-op-3.4],
348 [# This test file approximates the following test from "Bridge
349 # Functions Consortium Spanning Tree Protocol Operations Test Suite
351 # Test STP.op.3.3: Root Bridge Selection: Bridge ID Values
352 bridge 0 0x333^0x6000 = a
353 bridge 1 0x222^0x7000 = b
356 check 0 = rootid:0x333^0x6000 root
357 check 1 = rootid:0x333^0x6000 F:20
358 check 2 = rootid:0x333^0x6000 F:10 F
360 AT_CHECK([ovstest test-stp test-stp-iol-op-3.4], [0], [], [dnl
361 stp|INFO|stp333: detected topology change.
362 stp|INFO|stp111: detected topology change.
363 stp|INFO|stp111: detected topology change.
364 stp|INFO|stp333: detected topology change.
368 # Strips out uninteresting parts of flow output, as well as parts
369 # that vary from one run to another (e.g., timing and bond actions).
370 m4_define([STRIP_USED], [[sed '
371 s/used:[0-9]*\.[0-9]*/used:0.0/
372 s/duration=[0-9.]*s*/duration=Xs/
373 s/idle_age=[0-9]*,/idle_age=X,/
375 m4_define([FILTER_STP_TOPOLOGY], [[
376 grep 'STP state change' | sed '
377 s/.*ofproto_dpif|.*|port .*:/port <>:/
380 m4_define([FILTER_STP_TOPOLOGY_LISTENING], [[
381 grep 'disabled to listening' | sed '
382 s/.*ofproto_dpif|.*|port .*:/port <>:/
385 m4_define([FILTER_STP_TOPOLOGY_FORWARDING], [[
386 grep 'learning to forwarding' | sed '
387 s/.*ofproto_dpif|.*|port .*:/port <>:/
390 AT_SETUP([STP - dummy interface])
391 # Create br0 with interfaces p1 and p7
392 # and br1 with interfaces p2 and p8
393 # with p1 and p2 connected via unix domain socket
395 [set port br0 other_config:stp-enable=false -- \
396 set bridge br0 stp_enable=true -- \
398 set bridge br1 other-config:hwaddr=aa:66:aa:66:00:00 -- \
399 set bridge br1 datapath-type=dummy other-config:datapath-id=1234 \
400 fail-mode=secure -- \
401 set port br1 other_config:stp-enable=false -- \
402 set bridge br1 stp_enable=true --])
404 AT_CHECK([ovs-appctl vlog/set ofproto_dpif:dbg])
406 AT_CHECK([ovs-vsctl add-port br0 p1 -- \
407 set interface p1 type=dummy options:pstream=punix:$OVS_RUNDIR/p0.sock ofport_request=1 -- \
408 set port p1 other_config:stp-enable=true -- \
410 AT_CHECK([ovs-vsctl add-port br0 p7 -- \
411 set interface p7 ofport_request=7 type=dummy -- \
412 set port p7 other_config:stp-enable=false -- \
414 AT_CHECK([ovs-vsctl add-port br1 p2 -- \
415 set interface p2 type=dummy options:stream=unix:$OVS_RUNDIR/p0.sock ofport_request=2 -- \
416 set port p2 other_config:stp-enable=true -- \
418 AT_CHECK([ovs-vsctl add-port br1 p8 -- \
419 set interface p8 ofport_request=8 type=dummy -- \
420 set port p8 other_config:stp-enable=false -- \
423 ovs-appctl netdev-dummy/set-admin-state up
426 AT_CHECK([ovs-ofctl add-flow br0 "in_port=7 icmp actions=1"])
427 AT_CHECK([ovs-ofctl add-flow br0 "in_port=1 icmp actions=7"])
428 AT_CHECK([ovs-ofctl add-flow br1 "in_port=8 icmp actions=2"])
429 AT_CHECK([ovs-ofctl add-flow br1 "in_port=2 icmp actions=8"])
431 # give time for STP to move initially
433 ovs-appctl time/warp 3000
434 ovs-appctl time/warp 3000
436 AT_CHECK([cat ovs-vswitchd.log | FILTER_STP_TOPOLOGY_LISTENING], [0], [dnl
437 port <>: STP state changed from disabled to listening
438 port <>: STP state changed from disabled to listening
441 AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(7),eth(src=50:54:00:00:00:09,dst=50:54:00:00:00:0a),eth_type(0x0800),ipv4(src=10.0.0.2,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0)' | grep STP], [0], [dnl
442 >> STP not in forwarding state, skipping output
444 AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(8),eth(src=50:54:00:00:00:0b,dst=50:54:00:00:00:0c),eth_type(0x0800),ipv4(src=10.0.0.3,dst=10.0.0.4,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0)' | grep STP], [0], [dnl
445 >> STP not in forwarding state, skipping output
448 # give time for STP to synchronize
450 ovs-appctl time/warp 3000
451 ovs-appctl time/warp 3000
452 ovs-appctl time/warp 3000
453 ovs-appctl time/warp 3000
454 ovs-appctl time/warp 3000
455 ovs-appctl time/warp 3000
456 ovs-appctl time/warp 3000
457 ovs-appctl time/warp 3000
458 ovs-appctl time/warp 3000
459 ovs-appctl time/warp 3000
461 AT_CHECK([cat ovs-vswitchd.log | FILTER_STP_TOPOLOGY], [0], [dnl
462 port <>: STP state changed from disabled to listening
463 port <>: STP state changed from disabled to listening
464 port <>: STP state changed from listening to learning
465 port <>: STP state changed from listening to learning
466 port <>: STP state changed from learning to forwarding
467 port <>: STP state changed from learning to forwarding
470 AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(7),eth(src=50:54:00:00:00:09,dst=50:54:00:00:00:0a),eth_type(0x0800),ipv4(src=10.0.0.2,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0)' | grep Datapath], [0], [dnl
473 AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(8),eth(src=50:54:00:00:00:0b,dst=50:54:00:00:00:0c),eth_type(0x0800),ipv4(src=10.0.0.3,dst=10.0.0.4,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0)' | grep Datapath], [0], [dnl
479 AT_SETUP([STP - flush the fdb and mdb when topology changed])
480 OVS_VSWITCHD_START([])
482 # setting as below, the br0 will be root bridge and p5 will be blocked.
485 set port br0 other_config:stp-enable=false -- \
486 set bridge br0 datapath-type=dummy -- \
487 set bridge br0 stp_enable=true mcast_snooping_enable=true \
488 other-config:hwaddr=aa:66:aa:66:00:00 -- \
490 set port br1 other_config:stp-enable=false -- \
491 set bridge br1 datapath-type=dummy -- \
492 set bridge br1 stp_enable=true mcast_snooping_enable=true \
493 other-config:hwaddr=aa:66:aa:66:00:01 -- \
495 set port br2 other_config:stp-enable=false -- \
496 set bridge br2 datapath-type=dummy -- \
497 set bridge br2 stp_enable=true mcast_snooping_enable=true \
498 other-config:hwaddr=aa:66:aa:66:00:02
501 AT_CHECK([ovs-appctl vlog/set ofproto_dpif:dbg])
502 AT_CHECK([ovs-appctl vlog/set ofproto_dpif_xlate:dbg])
504 AT_CHECK([ovs-ofctl add-flow br0 action=normal])
505 AT_CHECK([ovs-ofctl add-flow br1 action=normal])
506 AT_CHECK([ovs-ofctl add-flow br2 action=normal])
509 ovs-vsctl add-port br0 p1 -- \
510 set interface p1 type=dummy options:pstream=punix:$OVS_RUNDIR/p1.sock ofport_request=1
511 ovs-vsctl add-port br0 p2 -- \
512 set interface p2 type=dummy options:stream=unix:$OVS_RUNDIR/p6.sock ofport_request=2
513 ovs-vsctl add-port br1 p3 -- \
514 set interface p3 type=dummy options:stream=unix:$OVS_RUNDIR/p1.sock ofport_request=3
515 ovs-vsctl add-port br1 p4 -- \
516 set interface p4 type=dummy options:pstream=punix:$OVS_RUNDIR/p4.sock ofport_request=4
517 ovs-vsctl add-port br2 p5 -- \
518 set interface p5 type=dummy options:stream=unix:$OVS_RUNDIR/p4.sock ofport_request=5
519 ovs-vsctl add-port br2 p6 -- \
520 set interface p6 type=dummy options:pstream=punix:$OVS_RUNDIR/p6.sock ofport_request=6
523 ovs-appctl netdev-dummy/set-admin-state up
526 # give time for STP to move initially
527 ovs-appctl time/warp 3000
528 ovs-appctl time/warp 3000
530 AT_CHECK([cat ovs-vswitchd.log | FILTER_STP_TOPOLOGY_LISTENING], [0], [dnl
531 port <>: STP state changed from disabled to listening
532 port <>: STP state changed from disabled to listening
533 port <>: STP state changed from disabled to listening
534 port <>: STP state changed from disabled to listening
535 port <>: STP state changed from disabled to listening
536 port <>: STP state changed from disabled to listening
539 # give time for STP to synchronize
540 ovs-appctl time/warp 3000
541 ovs-appctl time/warp 3000
542 ovs-appctl time/warp 3000
543 ovs-appctl time/warp 3000
544 ovs-appctl time/warp 3000
546 ovs-appctl time/warp 3000
547 ovs-appctl time/warp 3000
548 ovs-appctl time/warp 3000
549 ovs-appctl time/warp 3000
550 ovs-appctl time/warp 3000
552 AT_CHECK([cat ovs-vswitchd.log | FILTER_STP_TOPOLOGY_FORWARDING], [0], [dnl
553 port <>: STP state changed from learning to forwarding
554 port <>: STP state changed from learning to forwarding
555 port <>: STP state changed from learning to forwarding
556 port <>: STP state changed from learning to forwarding
557 port <>: STP state changed from learning to forwarding
560 # When topology is changed or the root brdige receives the TCN BPDU, the
561 # root bridge will start the topology change timer. We should wait the
562 # topology change timer to stop after 35s (max age 20 + forward delay 15).
563 # After 35s, the root bridge will stop send CONF BPDU with
564 # STP_CONFIG_TOPOLOGY_CHANGE flag and the topology will be stable. More
565 # importantly, we should make time warp (in a second) because the hold timer
566 # of stp ports will stop after 1s. So the root bridge can send quickly
567 # topology change ack (other bridges may send TCN BPDU to root bridge) for
568 # avoiding root brdige to flush fdb and mdb frequently.
569 for i in $(seq 0 35); do
570 ovs-appctl time/warp 1000
573 # root bridge sends query packet
574 # we don't want to lose that message, so send it twice
575 AT_CHECK([ovs-appctl netdev-dummy/receive br0 \
576 '01005E010101000C29A027D18100000108004500001C000100004002CBCBAC102201E00101011114EEEB00000000'])
578 ovs-appctl time/warp 1000
579 AT_CHECK([ovs-appctl netdev-dummy/receive br0 \
580 '01005E010101000C29A027D18100000108004500001C000100004002CBCBAC102201E00101011114EEEB00000000'])
582 OVS_WAIT_UNTIL([ovs-appctl fdb/show br0 | grep '00:0c:29:a0:27:d1'])
583 OVS_WAIT_UNTIL([ovs-appctl fdb/show br1 | grep '00:0c:29:a0:27:d1'])
584 OVS_WAIT_UNTIL([ovs-appctl fdb/show br2 | grep '00:0c:29:a0:27:d1'])
586 OVS_WAIT_UNTIL([ovs-appctl mdb/show br0 | grep 'querier'])
587 OVS_WAIT_UNTIL([ovs-appctl mdb/show br1 | grep 'querier'])
588 OVS_WAIT_UNTIL([ovs-appctl mdb/show br2 | grep 'querier'])
590 # del p2 on the br0, the topology will be changed
591 AT_CHECK([ovs-vsctl del-port br0 p2])
593 # give time for STP to synchronize
594 ovs-appctl time/warp 3000
595 ovs-appctl time/warp 3000
596 ovs-appctl time/warp 3000
597 ovs-appctl time/warp 3000
598 ovs-appctl time/warp 3000
600 ovs-appctl time/warp 3000
601 ovs-appctl time/warp 3000
602 ovs-appctl time/warp 3000
603 ovs-appctl time/warp 3000
604 ovs-appctl time/warp 3000
606 ovs-appctl time/warp 3000
607 ovs-appctl time/warp 3000
610 AT_CHECK([ovs-appctl fdb/show br0], [0], [dnl
613 AT_CHECK([ovs-appctl fdb/show br1], [0], [dnl
616 AT_CHECK([ovs-appctl fdb/show br2], [0], [dnl
620 AT_CHECK([ovs-appctl mdb/show br0], [0], [dnl
623 AT_CHECK([ovs-appctl mdb/show br1], [0], [dnl
626 AT_CHECK([ovs-appctl mdb/show br2], [0], [dnl
632 AT_SETUP([STP - check link-state when stp is running])
633 OVS_VSWITCHD_START([])
637 set port br0 other_config:stp-enable=false -- \
638 set bridge br0 datapath-type=dummy stp_enable=true \
639 other-config:hwaddr=aa:66:aa:66:00:00
643 ovs-vsctl add-port br0 p1 -- \
644 set interface p1 type=dummy -- \
645 set port p1 other_config:stp-port-num=1
646 ovs-vsctl add-port br0 p2 -- \
647 set interface p2 type=dummy -- \
648 set port p2 other_config:stp-port-num=2
651 ovs-appctl netdev-dummy/set-admin-state up
654 # give time for STP to move initially
655 for i in $(seq 0 30); do
656 ovs-appctl time/warp 1000
659 AT_CHECK([ovs-appctl stp/show br0 | grep p1], [0], [dnl
660 p1 designated forwarding 19 128.1
662 AT_CHECK([ovs-appctl stp/show br0 | grep p2], [0], [dnl
663 p2 designated forwarding 19 128.2
668 ovs-vsctl add-port br0 p3 -- \
669 set interface p3 type=dummy -- \
670 set port p3 other_config:stp-port-num=3
673 ovs-appctl netdev-dummy/set-admin-state p3 down
675 # We should not show the p3 because its link-state is down
676 AT_CHECK([ovs-appctl stp/show br0 | grep p1], [0], [dnl
677 p1 designated forwarding 19 128.1
679 AT_CHECK([ovs-appctl stp/show br0 | grep p2], [0], [dnl
680 p2 designated forwarding 19 128.2
682 AT_CHECK([ovs-appctl stp/show br0 | grep p3], [1], [dnl
685 ovs-appctl netdev-dummy/set-admin-state p3 up
687 AT_CHECK([ovs-appctl stp/show br0 | grep p1], [0], [dnl
688 p1 designated forwarding 19 128.1
690 AT_CHECK([ovs-appctl stp/show br0 | grep p2], [0], [dnl
691 p2 designated forwarding 19 128.2
693 AT_CHECK([ovs-appctl stp/show br0 | grep p3], [0], [dnl
694 p3 designated listening 19 128.3