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ospf flaps

suthomas1
Level 6
Level 6

Hi,

A switch keeps giving below messages ;

%OSPF-5-ADJCHG: Process 77, Nbr 10.58.21.122 on Vlan101 from LOADING to FULL, Loading Done

%OSPF-5-ADJCHG: Process 77, Nbr 10.58.21.122 on Vlan102 from FULL to DOWN, Neighbor Down: Dead timer expired

the configuration on the device is ,

int vlan 100

ip address 10.58.21.71 255.255.255.224

ip ospf message-digest-key 10 md5 xxxxxx

int vlan 101

ip address 10.58.21.33 255.255.255.224

ip ospf message-digest-key 10 md5 xxxxxx

router ospf 77

log-adjacency-changes

nsf

area 1 authentication message-digest

area 1 stub no-summary

area 1 range 10.58.21.0 255.255.255.0

area 1 filter-list prefix area1-OUT out

redistribute connected metric 200 subnets

redistribute static metric 10 subnets

passive-interface default

no passive-interface Vlan100

no passive-interface Vlan101

network 10.58.21.0 0.0.0.255 area 1

ip prefix-list area1-OUT seq 1 permit 10.58.21.70 /27

ip prefix-list area1-OUT  seq 2 permit 10.58.21.32 /27

Please help me with inputs, what could be the problem here.

Appreciate all help.

1 Reply 1

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

Can you post the neighbor router config for vlan 101 and 102?

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