Multicast address


why we are use multicast address on routing like eigrp



EIGRP uses multicast address for Neighbor Discovery, As you know Router does not Broadcast anything, but when EIGRP or any other protocol is configured it uses Multicast address for neighbor discovery, any router which is using this multicast address when passes to another router will get to know that there is a router who is EIGRP configured and they will become Neighbors.

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Multicast address is used to make neighborship in EIGRP