H3C Technologies H3C S3600 Series Switches User Manual
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1-8
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 1-2 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 for 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
Administratively scoped multicast addresses, which are for
specific 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 1-3 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
224.0.0.4
Distance Vector Multicast Routing Protocol (DVMRP)
routers
224.0.0.5
Open Shortest Path First (OSPF) routers
224.0.0.6
Open Shortest Path First designated routers (OSPF DR)
224.0.0.7
Shared tree routers
224.0.0.8
Shared tree hosts
224.0.0.9 RIP-2
routers
224.0.0.11 Mobile
agents
224.0.0.12
DHCP server/relay agent
224.0.0.13
All Protocol Independent Multicast (PIM) routers
224.0.0.14 Resource
Reservation Protocol (RSVP) encapsulation
224.0.0.15 All
core-based tree (CBT) routers
224.0.0.16
The specified subnetwork bandwidth management (SBM)
224.0.0.17 All
SBMS