EIGRP and Reliable Transport Protocol (RTP)

To advertise routing information whenever a change occurs to the network, EIGRPuses the Reliable Transport Protocol to maintain it’s database of network routes.

RTP allows routers to exchange the complete routing information when syncing for the first time then later only uses RTP for partial updates as the network changes.  RTP also makes sure that all updates are delivered reliably.

RTP combined with Hello completely remove the need for update messages to be sent periodically including all the network information in each update.



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