Enhanced interior gateway routing protocol (EIGRP) is a Cisco proprietary routing protocol based on their original IGRP. It is able to deal with classless interdomain routing which is its main advantage over its predecessor. Its main disadvantage is that it only runs on Cisco equipment which may lead to an organization being locked in to this vendor.

EIGRP can run separate routing processes for IP, IPX and AppleTalk. However, this does not facilitate translation between protocols.

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