learn about EIGRP

2.  Short for Enhanced Interior Gateway Routing
Protocol, EIGRP is a proprietary
Cisco protocol based on IGRP that combines the
advantages of link-state protocols with distance
vector protocols.

3.  EIGRP has four basic components:
 Neighbor Discovery/Recovery
 Reliable Transport Protocol
 DUAL Finite State Machine
 Protocol Dependent Modules

4.  EIGRP uses five packet types:
 Hello/Acks
 Updates
 Queries
 Replies
 Requests

5.  Yes, you configure EIGRP just like you configure
IGRP. You configure a routing process and which
networks the protocol should run over. Existing
configuration files can be used.

6.  Yes, there are both protocol independent and
dependent debug commands that inform you
what the protocol is doing. There is a suite
of show commands that give you neighbor table
status, topology table status, and EIGRP traffic
statistics.