Really, the only way this could happen is if Router B is not announcing its routes to 172.16.16/24 and Router A has a default route to its Ethernet interface. C. -----Original Message----- From: Ralph Doncaster [mailto:ralph@istop.com] Sent: Sunday, October 06, 2002 9:06 PM To: E.B. Dreger Cc: nanog@merit.edu Subject: Re: iBGP next hop and multi-access media

RD> When I setup a situation like the above, with Router B advertising RD> the 172.16.16.0/24 to router A, router A sees a next hop of RD> 10.10.10.2. This is not good since packets from A going to the RD> 172.16.16 subnet get sent to Router B, which then ARPs the RD> desitnation, instead of just being ARPed by router A.

Is this what you're trying to do:

route-map <foo> match <whatever> set ip next-hop <something>

Not really, what I want is router A to learn that ther is no next hop IP- the subnet is on the local ethernet. -Ralph