Anatomy of a Routing Table
To summarize the process of propagating routing tables, standard distance vector protocols broadcast the entire routing table to directly connected routing devices in regular update intervals as well as in flash updates. This makes the bandwidth overhead higher with traditional distance vector algorithms. Link-state protocols, on the other hand, use triggered multicast advertisement packets to notify other routers about changes in the topology. Only the specific topology changes are sent, not the entire routing table.
OSPF is a little different from the rest in that it also sends a required announcement every 30 minutes to maintain the synchronization of the topology database among all the routers in the area. The IP ...
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