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Each IPv6 host including routers uses an additional unicast address called a Link-local address. Link-Local addresses are used for some overhead protocols that stay local to one subnet but not for transferring data. eg., NDP (Neigbour Discovery protocol) which is the same as IPv4's ARP. Also, Routers use link-local addresses as the next-hop IP address in IPv6 routes. IPv6 hosts use Link-local addresses of the router(in the same subnet) as the default gateway address. Link-local addresses are unicast addresses, not multicast. Routers do not route packets with the link-local destination address. Every IPv6 ...
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