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FS#458 — FS#4527 — BFD

Attached to Project— Network
Modernization
Whole Network
CLOSED
100%
We tested the BFD on the OSPF (Bidirectional Forwarding Detection)
between ldn-1-6k and ams-1-6k. It works well. whereas, for the least
overloading of the router, the BFD does not respond well and the link is declared
down. This is a too dangerous feature to put into production.
We're going to pass. That is, when the link is down, the OSPF
puts between 1 to 3 seconds to reroute the packets instead of between
50 and 250ms.


Date:  Sunday, 29 August 2010, 15:10PM
Reason for closing:  Done
Comment by OVH - Sunday, 29 August 2010, 15:07PM

Aug 28 15:02:51 GMT: %BFD_TEST-7-CONFIG: Config changed on interface Port-channel1 to ON.
Aug 28 15:03:39 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 28 15:03:46 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 28 15:05:02 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 28 15:05:06 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Doneobj: [0x7146FF78] event_id: [0x00000003] er_p: [0x00000000] arg: [0x00000000] session state FAILING -> Unknown
Aug 29 08:47:15 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 29 08:47:32 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 29 08:48:32 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 29 08:48:44 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 29 08:51:08 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 29 08:51:19 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 29 08:51:56 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 29 08:52:16 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 29 08:55:05 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from FULL to DOWN, Neighbor Down: BFD node down
Aug 29 08:55:06 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Doneobj: [0x5A162B78] event_id: [0x00000003] er_p: [0x00000000] arg: [0x00000000] session state FAILING -> Unknown
Aug 29 08:55:44 GMT: %OSPF-5-ADJCHG: Process 16276, Nbr 30.94 on Port-channel1 from LOADING to FULL, Loading Done
Aug 29 10:43:13 GMT: %BFD_TEST-7-CONFIG: Config changed on interface Port-channel1 to OFF.


Comment by OVH - Sunday, 29 August 2010, 15:10PM

Test done with

ip ospf bfd
bfd interval 50 min_rx 50 multiply 5


ip ospf bfd
bfd interval 250 250 min_rx multiply 3

it takes the night and then again several false positives.