Hi all, i have following configuration:
Upstream A ---- [RA] ---- [RC] ---- [RB] --- Upstream B EBGP: RA - Upstream A RB - Upstream B Upstream A has 100% full internet routing table Upstream B has 70% internet routing table. on RA and RB: fib-update no and have default route to their respective EBGP peering RC has default route to RB, I want to keep kernel routing table as minimal as possible. How do i distribute routes from RA to RC and update kernel routing table if there is no route from RB? on RC i want to something like this: deny from RA deny from RB allow from RA if there's no route from RB So RC only contain 30% internet routing table. (RA and RB has 30% differences) Is it possible? Nowadays 30% of full internet routing table are 90K prefixes. Is there any significant differences looking up 300K than 90K routing table? Thanks, Leo
