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New Member

ASBR and ABR on the same router

Hi. Is it possible to have the ASBR (route redistribution) and OSPF ABR function on the same router?

4 REPLIES
Purple

Re: ASBR and ABR on the same router

Absolutely. There is nothing in OSPF that prevents such a setup.

Hope that helps - pls do rate the post if it does.

Paresh

Silver

Re: ASBR and ABR on the same router

Please advise your concern then we can help to explain more. Or you can check below link for OSPF design.

http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094e9e.shtml

Hope this helps.

New Member

Re: ASBR and ABR on the same router

Hi guys. I though so too that its possible, and i need the quick affirmation. thanks!Here's the setup:

- 4500s are running OSPF (actually part of a Core network of 3 nodes, so that's 3xCat4500, with 1 unit per node);

- the 3 Cat4500s are in full mesh;

- connected to each Cat4506 in each node is a FW (firewall)towards the LAN (static routing between Cat4506 and FW) - this makes the Cat4506 an ASBR redistributing static to OSPF;

PLAN: an additional suboffice is to be connected to the network via 2 of the nodes using a port on the Cat4500 (sort of multihome setup); the suboffice would then be configured as an NSSA area with the Cat4500 as the NSSA ABR. Any foreseeable routing problem? thanks guys!

Silver

Re: ASBR and ABR on the same router

I only find you need to consider how to reach the suboffice, by load-sharing or set one path as preferred path. Then it is fine on the design.

Hope this helps.

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