"Ralph" == Ralph Doncaster <ralph@istop.com> writes:
Ralph> I think we're both confused now. Your example seems to Ralph> have nothing to do with what I'm talking about. I'm Ralph> currently using an iBGP mesh in my network, with no OSPF or Ralph> IS-IS. In other words I have internal routers not Ralph> connected to external peers that are running iBGP. Ralph> Specifically I have 2 routers that are ruinning EBGP and Ralph> iBGP, and 2 routers that are running iBGP only. Now that Ralph> I'm adding a 5th router to my network, I'm considering Ralph> running OSPF for my IGP. I would still run iBGP between my Ralph> 2 peering routers, as well as EBGP to my peers. Ralph, there is nothing wrong with doing that. Just make sure that you don't have any routers without full tables in your transit path -- i.e. between your two peering routers -- and it will be fine as long as you don't do anything wacky like redistributing BGP routes into OSPF. Be careful with redistributing in the other direction also. There's no problem. It won't ruin anything. It is a pretty standard setup. Cheers, -w