Neighbor Discovery

• Media addresses allowed to be upto 128 bits long

• Part of ICMPv6 functionality

• Subsumes ARP, Router discovery.

• Source maintains several caches: destination cache, neighbor cache, prefix cache, router cache

• Multicast solicitation for neighbor media address if unavailable in neighbor cache

• Neighbor advertisement message sent to soliciting station.

• Redirects also part of ICMPv6

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