MULTIfunctions of MULTIcast

• IPv6 node MUST support multicast!

• Broadcast == «all nodes on this link» multicast group

  • don't forget to enable IGMP snooping/GMRP on switches

• All nodes with “similar” addresses share the same solicited-node multicast address

• Solicited-node multicast address format:

  • Globally-assigned prefix FF02::1:FF00:0:/104
  • low-order 24 bits of a node address
  Example: a node 2001:db8::1:20cd:f345:5432:51d8 joins the multicast group FF02::1:FF00:0:32:51d8