Enhanced Interior Gateway Routing Protocol (EIGRP)
As discussed in the previous section, IGRP represented a substantial improvement over RIP, but like any successful company, Cisco was not content to rest on its laurels. Cisco developers knew that IGRP had significant room for improvement, so they set to work on creating a better version of IGRP in the early 1990s. The result was the Enhanced Interior Gateway Routing Protocol (EIGRP).
Compared to the original protocol, EIGRP is more of an evolution than a revolution. EIGRP is still a distance-vector protocol, but it is more sophisticated than other distance-vector protocols like IGRP or RIP, and it includes certain features that are more often associated with link-state routing protocols like OSPF ...
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