Lower layer

Ethernet protocol type: different from IPv4
IPv4: 0x0800
IPv6: 0x86dd

Hardware address resolution
IPv4: medium dependent, ARP for ethernet
Simple protocol
IPv6: medium independent, NDP on ICMPv6
Manages more state than ARP, more complex (but efficient)
Implements DAD, Duplicated Address Detection

Uses link-layer multicast heavily
No use of broadcast
Link-layer broadcast will wake everyone up on the medium