well-known multicast (broadcast Ethernet-), ad-hoc :
# ping6 ff02::1%igb0
PING6(56=40+8+8 bytes) fe80::be5f:f4ff:fedd:2752%igb0 --> ff02::1%igb0
16 bytes from fe80::be5f:f4ff:fedd:2752%igb0, icmp_seq=0 hlim=64 time=0.036 ms
16 bytes from fe80::be5f:f4ff:fedd:98f1%igb0, icmp_seq=0 hlim=64 time=0.239 ms(DUP!)
16 bytes from fe80::be5f:f4ff:fee6:c37e%igb0, icmp_seq=0 hlim=64 time=0.344 ms(DUP!)
16 bytes from fe80::be5f:f4ff:fedd:9c5d%igb0, icmp_seq=0 hlim=64 time=0.479 ms(DUP!)