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New Member

EIGRP not releaseing routes back to BGP.

We have both BGP and EIGRP running on 3660 with 12.2(13).

The BGP is a primary protocol and EIGRP is the backup protocol; when BGP fails the EIGRP was taking over no problem, but after BGP backup, the EIGRP was not releasing the routes until we manually clear the routes.


Re: EIGRP not releaseing routes back to BGP.

Without more information than this, it's going to be hard to answer.... I would guess that what you are doing is learning some route through iBGP, and also through EIGRP, correct? And when the iBGP connect fails, and recovers, the iBGP route isn't being reinstalled? Or is it eBGP?


New Member

Re: EIGRP not releaseing routes back to BGP.

It is EBGP.

We have serial connect to carrier on MPLS with BGP protocol and Ethernet connect to backup router; the backup router has Frame connection to another carrier with EIGRP protocol.

The router learn non-local routes via BGP and local routes via EIGRP, when BGP fail, all the routes will from EIGRP, but when BGP restore, SOME of the routes were not back to BGP and we need to do the clear ip route...

Yes, some of the routes... All the non-local routes has the same AD which is 20.


Re: EIGRP not releaseing routes back to BGP.

When you say these two routers are connected to a provider, do you mean you're getting internet traffic through them, or traffic from some "main site" or "remote site?" Are you running BGP with one provider's routers, and EIGRP with another provider's router, or are you running BGP and eigrp with some routers that are in your network?

What I think is that you're running BGP with provider 1 at some other site, and redistributing from EIGRP into BBGP from some other site in your network. These routes are then carried over, through an MPLS tunnel, to the site you're talking about here. Then you also run a fram link to that same site, and run EIGRP over that frame link. Is this correct?

Can you check to see if the routes are both in the EIGRP topology table and the BGP table once the BGP session has recovered? Are you redistributing from EIGRP on the router showing these symptoms into EIGRP, or from BGP into EIGRP?