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New Member

Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

I have 2 routers connected via p2p link.They are in OSPF Area 0. The adjacency builds up from idle to full and exchanges full route database .After 3 to 4 minutes maximum the adjacency tears doen and neighbor ship again forms.This goes on after 3 to 4 mins.

What may be issue?

Regs

Kas

5 REPLIES

Re: Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

Can u pls check in the logs whether the link is flapping , or is the router cpu going high making the ospf relation to break.

regards

vanesh k

New Member

Re: Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

This was there in the show tech which I got.

CPU utilization for five seconds: 87%/13%; one minute: 20%; five minutes: 16%

But when we run static routes the traffic is moving fine.Only when we run ospf on the link then the issue starts

Regs

Kas

New Member

Re: Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

This was there in the show tech which I got.

CPU utilization for five seconds: 87%/13%; one minute: 20%; five minutes: 16%

But when we run static routes the traffic is moving fine.Only when we run ospf on the link then the issue starts

Regs

Kas

Re: Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

One of the reason for the high cpu also might be due to frequent ospf flapping . Is that ospf process is taking more cpu ??? in the show tech .

Might also be due to physical problem

regards

vanesh k

New Member

Re: Neighbor Adjaceny tears down after 3 to 4 mins

Hi,

What can be cause for the OSPF flapping ? Any possible reasons you can think of.

Regs

Kas

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