Multicast Address - Zte ZXR10 5900E Series User Manual

ZXR10 5900E Series User Manual (IPv6 Volume)
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anycast address. It is required to point out it is an anycast ad-
dress if it is allocated to a node.
Caution:
Anycast addresses can only be used on routers. Hosts can not use
anycast addresses. Anycast addresses can not be used as source
addresses in data packets.
Anycast address format of subnet router is shown in
T 7 ANYCAST ADDRESS FORMAT OF SUBNET ROUTER
ABLE
128 bits
Subnet prefix
Subnet prefix is a prefix for specified link. Set interface ID of in-
terface unicast address on the link to be 0, then it becomes subnet
router anycast address.
Packets that use subnet router anycast address as destination ad-
dress are transmitted to a router in this subnet. All routers in this
subnet should support subnet router anycast address.
When a node communicates with a router in a router group that
is in a remote network, subnet router anycast address can be ap-
plied.

Multicast Address

Prefix of IPv6 multicast address is FF00::/8 (1111 1111). Multicast
address is an identifier for a group of interfaces. These interfaces
belong to different nodes. Packets that use multicast address as
destination address are transmitted to all interfaces in this multi-
cast group. Multicast address format is shown in
T 8 FORMAT OF MULTICAST ADDRESS
ABLE
8 bits
11111111
Fields in Table 8 are described as follows:
1. In the first field, 8 bits of 1 mean this is a multicast address.
2. When the value in flag field is 0, it means this is a permanent
multicast address. If the value in flag field is 1, it means this
is a temporary multicast address.
Range field is used to limit the range of multicast group. The
ranges corresponding to values are shown in
0000...0000
4bits 4 bits
Flag Range
Table 7.
Table 8.
112 bits
Group ID
Table 9 .