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Re: OSPF multi-level hierarchy: Necessary at all?
Tony Li <[email protected]> wrote: >I suspect that the main driver is not the amount of routing information >in the gross sense, but the scalability of the protocol as the number of >nodes increases. There's a better solution: decrease the number of nodes by replacing clusters with bigger boxes. This has an additional advantage of reducing number of hops (and, consequently, latency variance). K.I.S.S. rulez :) --vadim PS. Using DUAL or DASM instead of SPF helps, too -- these algorithms tend to eliminate updates which "do not matter" unlike SPF-based algorithms which have to inform everyone about local topology changes.