Monday, October 24, 2016

EIGRP Unicast Updates

EIGRP hello packets are sent to the multicast address 224.0.0.10, whereas topology synchronization between two neighbors is unicast. The neighbor statement under the EIGRP process is used to send hello packets as unicasts. However, unlike RIP, the  passive-interface command is not needed to suppress the sending of the multicast hellos. This means that if the  neighbor statement is configured on one end of the adjacency, it is required to be configured on the other end as well.

Configuring neighbor command on one side will bring the adjacency down





configuring neighbor command on the other end will bring the adjacency up


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