On Sat, 14 May 2011 17:50:39 +0100, Nick Hilliard <[email protected]> wrote:
> yes if the next-hop changes, but network topology change events will often > not cause a next-hop change, just a SFP recalculation - which means that > if > your SFP domain is smaller, it will converge faster. I.e. the router's > FIB > may be updated, but ibgp will not be aware of the topology change. > > The things that cause next-hop changes are customer edge flaps. Not only customer-link flaps, but also every downtime of any of your routers which terminates BGP routes, eg. all edge-routers. > As regards carrying non-infrastructure prefixes in OSPF, it really depends > on how big your network is. For small networks it doesn't matter very > much. For large networks, there is no choice other than ibgp because > having a functional prefix management system is more important than > shaving > a couple of seconds off a customer edge link-up event. For networks in > the > middle, they usually start out by putting non-infrastructural prefixes > into > the IGP but change later on because it doesn't scale well and having a > flexible interior routing policy becomes more important than fast > convergence. Yes, but we are talking about network of 11 routers. :-) _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
