31.1.1 IPv6 multicast address

In IPv6 multicast communication, IPv6 addresses, the eight highest-order bits of which are FF (in hexadecimal), are used as destination addresses. An IPv6 multicast address is a logical group address that exists only within a group participating in the sending and receiving of multicast data. The following figure shows the IPv6 multicast address format.

Figure 31-1: Format of multicast addresses