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New Member

IPSec/GRE tunnel stops

I need help how to begin to troubleshoot a vpn issue.

We have 15 IPSec/GRE tunnels from remote sites to our head office.

4 remote offices are loosing their connection 2-3 times every week.

If i do a "sh crypto isakmp sa" on the remote routers it looks OK, state is QM_IDLE and status ACTIVE.
To fix the issue today I do a shut/no shut on the tunnel interface.

I do not really know when the problem started but it has become more frequent lately. We have not made any major changes beside added a few remote offices.
We do not use the same router models or software on the offices where the issues are so I cant derive it to any particular model or ios version.

Is there any show commands I can use to troubleshoot and hopfully find the issue when the problem occurs?

Thanks for any suggenstions

New Member

Re: IPSec/GRE tunnel stops

What type of hardware are you using at the main office?

Sent from Cisco Technical Support iPhone App

Please rate as helpful, if that would be the case. Thanx
New Member

Re: IPSec/GRE tunnel stops

Hi, on main office, a 2900 router, on remote offices 881, and a few 871

On the 2900 router i have maximum 50-60% cpu usage during the day

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