an one of my border router ospf started flapping without reason the link was ok
i have tested it
the log file shows the following
at the beggining started with this messages
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.213.128.0/17: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.214.0.0/17: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.214.128.0/17: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.215.0.0/17: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.215.128.0/17: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.216.0.0/15: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.218.0.0/16: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.219.0.0/16: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.220.0.0/15: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.240.0.0/13: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
2010/05/01 17:36:25 ZEBRA: kernel_rtm_ipv4: 222.246.191.0/24: rtm_write()
unexpectedly returned -4 for command RTM_DELETE
Later OSPF started to flap after this i restarted quagga deamon and the ospf
continued to flap with this messages
2010/05/18 18:42:19 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
43227ms (cpu time 0ms)
2010/05/18 18:42:28 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
9140ms (cpu time 0ms)
2010/05/18 18:42:59 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
30557ms (cpu time 0ms)
2010/05/18 18:42:59 OSPF: SLOW THREAD: task ospf_write (800670920) ran for
19783ms (cpu time 0ms)
2010/05/18 18:44:31 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
92158ms (cpu time 0ms)
2010/05/18 18:45:17 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
46164ms (cpu time 0ms)
2010/05/18 18:45:17 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
119622ms (cpu time 372ms)
2010/05/18 18:45:28 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
11152ms (cpu time 0ms)
2010/05/18 18:47:56 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
147739ms (cpu time 0ms)
2010/05/18 18:47:56 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
158815ms (cpu time 373ms)
2010/05/18 18:48:44 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
47649ms (cpu time 0ms)
2010/05/18 18:50:39 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
115218ms (cpu time 0ms)
2010/05/18 18:50:39 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
162774ms (cpu time 372ms)
2010/05/18 18:51:23 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
44371ms (cpu time 0ms)
2010/05/18 18:52:19 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
55878ms (cpu time 0ms)
2010/05/18 18:52:20 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
100162ms (cpu time 378ms)
2010/05/18 18:55:27 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
187961ms (cpu time 60ms)
2010/05/18 18:55:27 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
187858ms (cpu time 369ms)
2010/05/18 18:55:49 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
22402ms (cpu time 0ms)
2010/05/18 18:55:49 OSPF: SLOW THREAD: task ospf_write (800670920) ran for
20494ms (cpu time 0ms)
2010/05/18 18:55:50 BGP: SLOW THREAD: task bgp_scan_timer (439890) ran for
20924ms (cpu time 373ms)
2010/05/18 18:55:59 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
7289ms (cpu time 0ms)
2010/05/18 18:56:32 ZEBRA: SLOW THREAD: task work_queue_run (8006a2b90) ran for
31641ms (cpu time 0ms)
then i rebooted the machine and all worked perftectly
The Setup is as follows:
2 FreeBSD 8.0 routers with 4 interfaces each
Each router has 2 layer 2 links (no load balancing just redudancy)
i will try to illustrate it with ascii
Lo0
Lo1
PROVIDER-----------------------------------------------------------------------------------
| Link1 |Link2
|Link3 |Link4
| |
| |
| |
| |
\ /
\ /
em0 em1
em0 em1
FBSD0 em2------------------------------em2
FBSD1
|
|
em3 carp
em3 carp
FBSD0:
Link 1 OSPF cost 10
Link 2 OSPF cost 20
eBGP Provider lo0 with FBSD0 Lo1 (LocalPref 120 on incoming)(eBGP multihop)
iBGP with FBSD1 (next hop self)
and CARP for lan interface
FBSD1:
Link3 OSPF cost 30
Link4 OSPF cost 40
eBGP with Provider lo1 to FBD1 Lo1 (LocalPref 80 on incoming)(eBGP multihop)
iBGP with FBSD0 (next hop self)
and CARP for lan interface
Any idea why this is happening? these logs all generated at FBSD1 (backup
router) FBSD0 working well._______________________________________________
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