Operation Manual – Multicast Protocol
Quidway S5600 Series Ethernet Switches-Release 1510 Chapter 1 Multicast Overview
Huawei Technologies Proprietary
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z The membership of a group is dynamic. A host can join and leave a multicast
group at any time.
z A multicast group can be either permanent or temporary.
z A multicast group whose addresses are assigned by IANA is a permanent
multicast group. It is also called reserved multicast group.
Note that:
z The IP addresses of a permanent multicast group keep unchanged, while the
members of the group can be changed.
z There can be any number of, or even zero, members in a permanent multicast
group.
z Those IP multicast addresses not assigned to permanent multicast groups can
be used by temporary multicast groups.
Class D IP addresses range from 224.0.0.0 to 239.255.255.255. For details, see
Table
1-1.
Table 1-1 Range and description of Class D IP addresses
Class D address range Description
224.0.0.0 to 224.0.0.255
Reserved multicast addresses (IP addresses for
permanent multicast groups). The IP address
224.0.0.0 is reserved. Other IP addresses can be
used by routing protocols.
224.0.1.0 to 231.255.255.255
233.0.0.0 to 238.255.255.255
Available any-source multicast (ASM) multicast
addresses (IP addresses of temporary groups).
They are valid for the entire network.
232.0.0.0 to 232.255.255.255
Available source-specific multicast (SSM)
multicast group addresses.
239.0.0.0 to 239.255.255.255
Local management multicast addresses, which
are used in the local use only.
As specified by IANA, the IP addresses ranging from 224.0.0.0 to 224.0.0.255 are
reserved for network protocols on local networks. The following table lists commonly
used reserved IP multicast addresses:
Table 1-2 Reserved IP multicast addresses
Class D address range Description
224.0.0.1 Address of all hosts
224.0.0.2 Address of all multicast routers
224.0.0.3 Unassigned
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