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New Member

tunnel and EIGRP

Hi everybody:

I have a tunnel between two routers, my routing protocol is EIGRP.

I have a problem, the EIGRP session between the routers goes down everytime it detects a EIGRP change in my network.

Do you have any recommendation to stop the EIGRP goes down in the tunnel?

TIA

these events are an example:

Jul 29 17:17:12: %DUAL-3-SIA: Route 172.26.1.167/32 stuck-in-active state in IP-

EIGRP(0) 146. Cleaning up

Jul 29 17:17:12: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 146: Neighbor 172.18.252.13 (Tun

nel1) is down: stuck in active

Jul 29 17:17:13: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 146: Neighbor 172.18.252.13 (Tun

nel1) is up: new adjacency

3 REPLIES
New Member

Re: tunnel and EIGRP

What ype of tunnel do you have setup?

In order to support routing protocols over it, it needs to be a GRE tunnel or a Virtual tunnel

Hall of Fame Super Silver

Re: tunnel and EIGRP

Since the messages quoted in the original post indicate that EIGRP neighbor relationships are formed over the tunnel we are pretty safe in assuming that this is a GRE tunnel:

Jul 29 17:17:12: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 146: Neighbor 172.18.252.13 (Tunnel1) is down: stuck in active

Jul 29 17:17:13: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 146: Neighbor 172.18.252.13 (Tunnel1) is up: new adjacency

Also we see in the message included that the problem is triggered by Stuck In Active (SIA):

Jul 29 17:17:12: %DUAL-3-SIA: Route 172.26.1.167/32 stuck-in-active state in IP-EIGRP(0) 146. Cleaning up

So the real question is why is the other neighbor not able to get responses to the query that it has sent? If you can find that you will have found the solution to the problem.

HTH

Riok

Re: tunnel and EIGRP

Did you change 'bandwidth' of the tunnel interface? By default it's 9Kbps, and by default EIGRP uses only upto 50% of the interface bandwidth. Chances are that 4.5Kbps isn't enough for your updates. Try either setting 'bandwidth ' or 'ip bandwidth-percent eigrp 1 500' on tunnel interface.

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