How to Filter Prefixes with Distribute-list

Lessons Discussion
6

Hi @Robhorseman101,

The EIGRP route-map filtering lesson only has two routers with a single link so I think you had something else in mind? :smile:

In your config, I see the tunnel interfaces of your routers:

interface Tunnel0
 ip address 192.168.100.2 255.255.255.0
 tunnel source GigabitEthernet2/0.40
 tunnel destination 10.164.56.33

And:

interface Tunnel0
 ip address 192.168.100.1 255.255.255.0
 tunnel source GigabitEthernet2/0.40
 tunnel destination 10.164.58.33

Not sure on which router you get the recursive routing error but for example, if it’s the first one then somehow a more specific route to 10.164.56.33 gets installed through your tunnel interface.

Make sure you filter those so that a route to 10.164.56.33 or 10.164.58.33 is never learned through the tunnel. Look for the networks that are advertised through the tunnel and deny those. If it is learned through EIGRP, you can do something like this:

R1(config)#router eigrp 1
R1(config-router)#distribute-list 1 in tunnel 0

Hope this helps!

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