[c-nsp] faster IGP convergence

[Daniel Roesen]

On Mon, Feb 14, 2005 at 03:38:17PM +0100, Oliver Boehmer (oboehmer) wrote:
> Generally speaking, ISIS and OSPF can converge equally fast (sub-second
> for 2000 IGP prefixes) if tuned and designed appropriately.

IS-IS might have some advantage as you can trim down your IGP size
significantly to just the loopback routes, unlike with OSPF where you
need to have all your backbone links in IGP as well. This brings down
the LSP size and thus allows for faster propagation, and thus
convergence - in theory. When having IS-IS networks of large diameters
(router hop count), this might be a significant factor when fighting
in the sub-second range.

Can someone comment on that from real-world experience with actual
implementations?


Best regards,
Daniel

-- 
CLUE-RIPE -- Jabber: dr at cluenet.de -- dr at IRCnet -- PGP: 0xA85C8AA0