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>> Routing tables are stored in memory on the linecards > maybe they are on some router models. on most i know, only > forwarding tables are on line cards and routing tables are > more centralized (but still possibly somewhat distributed > on very large and/or redundant systems). it may be worth noting the work of greenberg et al., which showed that, for one vendor with whom you may be familiar, updating the fibs when a rib changed (due to ospf link change), took the majority of the time, i.e., more than spf calculation. randy
