[nsp] OSPF Adjacency

Bruce Pinsky bep at whack.org
Wed Jun 9 15:21:24 EDT 2004 

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Marakovic, Ivan wrote:

| Hi All,
|
| I have a problem with two of our core routers (Cisco 3640) not being
| able to form an OSPF adjacency across the Serial 0/0.10 subinterface
| running Frame Relay (point to point).  They go to extart state and then
| to down again.  Same routers have formed an OSPF adjacency with some
| other routers through the other subinterface (serial 0/0.20)
|
| It just started happening yesterday.  They ware running for two years
| with no problems.
|
| Now,  both routers can ping each other via that interface.  There is no
| layer 2 problems on these interfaces.
|
| I have cleared the OSPF processes but that did not help.
|
| Debug ip ospf adj gives me the following:
|
| Jun  9 15:27:04: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:04: OSPF: Up DBD Retransmit cnt to 8 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:04: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:04: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:04: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:09: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:09: OSPF: Up DBD Retransmit cnt to 9 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:09: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:09: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:09: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:14: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:14: OSPF: Up DBD Retransmit cnt to 10 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:14: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:14: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:14: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:19: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:19: OSPF: Up DBD Retransmit cnt to 11 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:19: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:19: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:19: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:24: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:24: OSPF: Up DBD Retransmit cnt to 12 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:24: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:24: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:24: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:29: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:29: OSPF: Up DBD Retransmit cnt to 13 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:27:29: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0x1A59
| opt 0x422
| Jun  9 15:27:29: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0x98F
| opt 0x42T
| Jun  9 15:27:29: OSPF: First DBD and we are not SLAVE
| Jun  9 15:27:34: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:27:34: OSPF: 10.1.1.1 address 192.168.102.5 on Serial0/0.10 is
| dead, N
| Jun  9 15:27:34: %OSPF-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0.10
| from Es
| Jun  9 15:28:34: OSPF: 10.1.1.1 address 192.168.102.5 on Serial0/0.10 is
| dead
| Jun  9 15:28:34: OSPF: 10.1.1.1 address 192.168.102.5 on Serial0/0.10 is
| dead, n
| Jun  9 15:28:34: %OSPF-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0.1
| d
| Jun  9 15:28:44: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:28:44: OSPF: 2 Way Communication to 10.1.1.1 on Serial0/0.10,
| state 2Y
| Jun  9 15:28:44: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:28:44: OSPF: First DBD and we are not SLAVE
| Jun  9 15:28:49: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:28:49: OSPF: Up DBD Retransmit cnt to 1 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:28:49: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:28:49: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:28:49: OSPF: First DBD and we are not SLAVE
| Jun  9 15:28:54: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:28:54: OSPF: Up DBD Retransmit cnt to 2 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:28:54: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:28:54: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:28:54: OSPF: First DBD and we are not SLAVE
| Jun  9 15:28:59: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:28:59: OSPF: Up DBD Retransmit cnt to 3 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:28:59: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:28:59: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:28:59: OSPF: First DBD and we are not SLAVE
| Jun  9 15:29:04: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:29:04: OSPF: Up DBD Retransmit cnt to 4 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:29:04: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:29:04: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:29:04: OSPF: First DBD and we are not SLAVE
| Jun  9 15:29:09: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:29:09: OSPF: Up DBD Retransmit cnt to 5 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:29:09: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:29:09: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:29:09: OSPF: First DBD and we are not SLAVE
| Jun  9 15:29:14: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:29:14: OSPF: Up DBD Retransmit cnt to 6 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:29:14: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:29:14: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:29:14: OSPF: First DBD and we are not SLAVE
| Jun  9 15:29:19: OSPF: Retransmitting DBD to 10.1.1.1 on Serial0/0.10
| Jun  9 15:29:19: OSPF: Up DBD Retransmit cnt to 7 for 10.1.1.1 on
| Serial0/0.10
| Jun  9 15:29:19: OSPF: Send DBD to 10.1.1.1 on Serial0/0.10 seq 0xC58
| opt 0x42 2
| Jun  9 15:29:19: OSPF: Rcv DBD from 10.1.1.1 on Serial0/0.10 seq 0xBF1
| opt 0x42T
| Jun  9 15:29:19: OSPF: First DBD and we are not SLAVE
| ...
|
|
| Anyone seen this before??
|
|

Looks and sounds similar to MTU mismatch.  See:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftbgpri.htm

- --
=========
bep

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