Routing between AS's

[steffens_n]

I want to route between two AS's internally in a router. Both AS's are running EIGRP. How would I accomplish this?

[Richard Burts]

I am not clear about what your question is asking. It clearly says that you are asking about one router with two EIGRP processes each with a different AS number.

If a single router has two EIGRP processes then both processes will place routes into the routing table. And the router will make routing decisions based on information learned by both routing protocol processes. Is this what you are asking about?

Or are you asking how you can get information learned from EIGRP AS 1 into EIGRP AS 2? If some routes have been learned by EIGTP AS 1 and you want those routes to be learned and advertised by EIGRP AS 2 then you need to redistribute from AS 1 into AS 2. (You might also redistribute from AS 2 into AS 1). When you redistribute you may want to use a distribute list to control which routes are learned via redistribution. Is this what you are asking about?

If you clarify what you are asking perhaps we can find better answers.

HTH

Rick

[steffens_n]

Sorry that I wasn't clear. I'm going to have two AS's in the router, both running EIGRP. Most of the traffic will be separated by the ASs (traffic from subnet A will be routed out AS 1, traffic from subnet B will be routed out AS 2). What I want to accomlish is if a device on subnet A wants to communicate to a device on subnet B, they route across the ASs and not out the WAN link through bgp and then back to the same router. The router will connect to the WAN link (AS 1) and the router will connect to an optic ring which house AS 2.

I hope this is more clear!

[Richard Burts]

I am still not clear about what you are asking. You talk about subnet a and subnet b. Are both subnet a and subnet b connected on this router? or are these subnets remote from the router?

If both subnets are connected to the router it is an easy situation. If both subnets are connected to the router then the router will route directly between the subnets and will not go out the WAN.

If the subnets are remote from the router then we need to understand the network topology better. Where are the subnets, and how does subnet a know that it should get to subnet b by going to this router?

HTH

Rick