Updates and Changes

Updates and Changes
EIGRP also has link-state properties. One of these properties is that it propagates only changes
in the routing table instead of sending an entire new routing table to its neighbors. EIGRP relies
on IP to deliver updates to its neighbors, as shown in a breakdown of an EIGRP packet in
Figure 4.5. When changes occur in the network, a regular distance-vector routing protocol will
send the entire routing table to its neighbors. By avoiding sending the entire routing table, less
bandwidth is consumed and less CPU overhead is achieved. Neighboring routers don’t have to
reinitialize the entire routing table; all the routers need to do is insert the new route changes.
This is one of the big advantages that EIGRP has over IGRP.