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Global scope

Table 9-2 Indications of the Scope

 Group ID: 112 bits, IPv6 multicast group identifier that uniquely identifies an IPv6 multicast

group in the scope defined by the Scope field.

Reserved Multicast Addresses:

Address

Indication

FF01::1

All interface-local IPv6 nodes

FF02::1

All link-local IPv6 nodes

FF01::2

All interface-local IPv6 routers

FF02::2

All link-local IPv6 routers

FF05::2

All site-local IPv6 routers

FF0X::

X ranges from 0 to F. These multicast addresses are

reserved and shall never be assigned to any multicast

group.

Table 9-3 Reserved IPv6 Multicast Addresses

The solicited-node multicast address is a multicast group that corresponds to an IPv6 unicast

or anycast address. It is usually used for obtaining the Layer 2 link-layer addresses of

neighboring nodes within the local-link or applied in IPv6 Duplicate Address Detection. A node

is required to join the associated Solicited-Node multicast addresses for all unicast and

anycast addresses that have been configured for the node's interfaces.

IPv6 Solicited-Node Multicast Address Format:

FF02:0:0:0:0:1:FFXX:XXXX

The IPv6 solicited-node multicast address has the prefix FF02:0:0:0:0:1:FF00:0000/104

concatenated with the 24 low-order bits of a corresponding IPv6 unicast or anycast address.

2. IPv6 Multicast MAC Address

The high-order 16 bits of an IPv6 multicast MAC address begins with 0x3333 while the

low-order 32 bits of an IPv6 multicast MAC address are the low-order 32 bits of the IPv6

multicast IP address. The mapping relationship is described as the following figure:

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