> Not true. All /prefixes/ will still be visible in all areas without > summarization, but you'll still minimize the LSDB because type 1 and 2 LSAs > never cross an area boundary.
Right, but as Brett mentions, that doesn't stop them, it just turns them into type 3s. Sometimes it even turns a single type 1 (with stub networks on it) to multiple type 3s. I am curious if someone can explain any benefits to non-summarized areas. Perhaps there's benefit on the Dijkstra front if you have ISPF enabled? Perhaps the flooding model is reduced a bit by relying on a small number of ABRs to flood the type 3s, rather than intra-area type 1 and 2 flooding? I honestly don't know, and would like to. > According to Jeff Doyle, control plane performance concerns are not related > to running Dijkstra, but rather lie in LSDB maintenance: Keeping track of > timers and such. So if this is the case, it would seem the LSDB doesn't get any smaller (with type 3's subbing in for 1 and 2), except now ABRs have to maintain multiple LSDBs, thus doubling/tripling their burden? -Geoff _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
