OSPF dead timer expired

[maher]

Hi there,

Recently, my ospf network become unstable for quite unknown reasons. Basically, the interface/layer 1 is totally not down, but somehow is become "dizzy".For fast action, need to deactivate network and activate back under ospf.By the way, below is the log taken for this event:

Dec 25 22:04:38.740: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from FULL to DOWN, Neighbor Down: Dead timer expired

Dec 25 22:04:41.052: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from LOADING to FULL, Loading Done

Dec 26 20:12:55.674: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired

Dec 27 20:12:54.675: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired

Dec 28 20:12:46.811: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired

Dec 29 20:12:34.706: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on FastEthernet4/0 from 2WAY to DOWN, Neighbor Down: Dead timer expired

Any ideas?

thanks in advance

[thisisshanky]

How are these two devices connected ? Can they ping each other ? Can you paste relevant OSPF and interface configs ?

[maher]

Hi there,

Basically they are connected back to back.Yes, it is pingable from both sites. R1 connected back to back with R2 and R3.

R1--R2

|

R3

R1 config:

router ospf 200

log-adjacency-changes

network 192.168.0.0 0.0.0.3 area 0

network 192.168.1.0 0.0.0.3 area 1001

R2 config:

router ospf 200

log-adjacency-changes

network 192.168.0.0 0.0.0.3 area 0

R3 config:

router ospf 200

log-adjacency-changes

network 192.168.1.0 0.0.0.3 area 1001

thank you.

maher

[s.conway]

what does the output from 'show ip ospf neighbor' look like on each router? Are the fastethernet interfaces hard coded to 100 full or auto/auto? Could you post the interface config?