EIGRP over GRE thru a MPLS provider

[markbowman]

I need a configuration sample of a GRE tunnel with EIGRP updating thru the tunnel. We are running EIGRP and our new provider (mpls) is not sending the EIGRP updates so we need to be able to create a tunnel for the eigrp traffic. Any configuration sample will help, thanks.

[devang_etcom]

hi...

take a look at this configuration example:http://www.cisco.com/warp/public/105/gre_flap.html

hope this will help you

rate this post if it helps you

regards

Devang

[Richard Burts]

Mark

Running EIGRP over GRE tunnels is relatively straightforward. You configure a GRE tunnel, assign an IP address on the tunnel, and make sure that the ip address of the tunnel is included in a network statement in your EIGRP. It might look a bit like this:

interface tunnel 0

ip address 172.16.17.1 255.255.255.252

tunnel source 192.168.1.1

tunnel destination 192.168.2.1

router eigrp 1

network 172.16.0.0

where 192.168.1.1 is the address of some interface on the router - perhaps the interface into the MPLS cloud and 192.168.2.1 is some reachable address on the remote router - perhaps its interface into MPLS.

I have done this many times and it works quite well.

One thing to watch for when configuring GRE tunnels is that you do not want to advertise the tunnel destination via the routing protocol going through the tunnel. If the tunnel destination is advertised through the tunnel it may cause problems with recursive routing.

HTH

Rick