RIP filtering - how to filter routes from specific neighbors

[norteldude78]

Is it possible to filter certain routes from specific RIP routers?

Scenario:

Router 1,2,3 are on the same LAN segment
Router 2 and 3 are both sending an advertisement for network A to Router 1.
Router 1 is choosing the path through Router 2.
I don't Router 1 to EVER except this route, I only want the route from Router 3...

I tried using distribute-lists with gateway prefix-lists, but this doesn't accomplish what I need...It only filters ALL routes from the gateway or specific routes from one gateway and blocks all others.

In other words, I still need routes from R2, just not to network A.

Also, I can only configure Router 1, not 2 or 3.

Is this possible?
Any ideas?

Thanks,

 

[brianinms]

I know how to filter routes for a network and filter routes from a host. However I dont know how to reject a route from one host, but allow it from another. Are you sure that router 2 doesn't have a better route to the network? If all routers are on the same network and the network does exist of router 3 then i am sure router 2 sends an icmp redirect.

 

[norteldude78]

well R2 is a VPN router that is doing some reverse route injection. Im not sure if its a better path or not (lower hops would suggest it is, unless they are redistributing with a seed metric of 1 hop) but its not the "preferred" path according to the LAN admin.

R2 and R3 are not in my "realm" which is why I was looking for some advice about R1...i swear i came across something before but it may have been something else.

 

[burtsbees]

http://www.cisco.com/univercd/cc/td.../5000sw/conce60x/ref60x/editconf/iprtefil.htm

Burt

 

[norteldude78]

thanks, the link was for VPN 5000 but it looks like what im trying to do. im using a router running 12.4 code