AT&T NYC

Tue Sep 3 15:26:54 UTC 2002

On Tue, 3 Sep 2002, Jesper Skriver wrote:

> > Links and loopbacks => IGP

> Why on earth does you want your link addresses in your IGP ?

> Sometimes it cannot be avoided, due to bad implementation, but why do
> you need it ?

Routers that learn a route over IBGP need to know where the next hop
address for route from other AS points to. Since this can't be a loopback
address and you typically don't run an IGP on subnets between border
routers in your AS and a remote AS, you need to either set next-hop-self
on all IBGP sessions or redistribute connected in your IGP.

Iljitsch van Beijnum