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EIGRP Neighbor Relationships


The EIGRP neighbor relationship is much simpler than OSPF. EIGRP does not have an additional concept of being fully adjacent like OSPF, and there are no neighbor states like OSPF. As soon as a EIGRP neighbor is discovered and passes the basic verification checks, the router becomes a neighbor. At that point, the two routers can begin exchanging topology information.







References

Odom, Wendell (2008) CCNA ICND2 Official Exam Certification Guide, Second Edition. Indianapolis: Cisco Press.