ZXR10 5900E Series Configuration Guide (IPv6)
Name
Address
Description
Requested node multicast
addresses
FF02::1:FFxx:xxxx
Consisting of the address
prefix FF02::1:FF00:/104 (in
front) and low 24 bits of a
unicast or anycast address of a
requested node. For example,
4307::01:800:200E:8C6C
is corresponding to
FF02::1:FF0E:8C6C.
RFC 3306 defines a mode to allocate IPv6 multicast addresses dynamically, that is, an IPv6
multicast address on the basis of unicast prefix. A such IPv6 multicast address includes the
unicast address prefix of its multicast source network. Global-unique multicast addresses
can be allocated in this way. The address structure is shown in
Figure 11-1 Structure of IPv6 Multicast Address on Basis of Unicast Prefix
IPv6 Multicast Protocols
The multicast protocols supported by IPv6 include Multicast Listener Discovery (
MLD Snooping, IPv6 Protocol Independent Multicast (PIM) and IPv6 MBGP.
1.
Multicast routing group management protocol
MLD originate from Internet Group Management Protocol (
). MLDv1 corresponds
to IGMPv2, and Multicast Listener Discovery Version 2 (
) corresponds to
IGMPv3. Different from IGMP which uses message type of IP protocol number 2,
MLD uses message type of ICMPv6 (the IP protocol number is 58), including MLD
Query message (type value is 130, MLDv1 Report message (type value is 131),
MLDv1 Leaving message (type value is 132) and MLDv2 Report message (type
value is 143). MLD acts completely the same as IGMP does excepts for the message
structure.
MLD Snooping is similar to IGMP Snooping.
2.
Multicast routing protocol
IPv6 PIM protocol action is the same as that of IPv4 PIM except the IP address
structure in messages. IPv6 PIM also supports Sparse Mode (SM), Dense Mode
(DM) and Source Specific Multicast (
11-2
SJ-20150114102049-011|2015-01-15 (R1.0)
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