3Com 4210 9-Port Configuration Manual page 260

Class D address range
232.0.0.0 to 232.255.255.255
239.0.0.0 to 239.255.255.255
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
224.0.0.1
224.0.0.2
224.0.0.3
224.0.0.4
224.0.0.5
224.0.0.6
224.0.0.7
224.0.0.8
224.0.0.9
224.0.0.11
224.0.0.12
224.0.0.13
224.0.0.14
224.0.0.15
224.0.0.16
224.0.0.17
224.0.0.18
224.0.0.19 to
224.0.0.255
Like having reserved the private network segment 10.0.0.0/8 for unicast, IANA has also reserved the
network segment 239.0.0.0/8 for multicast. These are administratively scoped addresses. With the
administratively scoped addresses, you can define the range of multicast domains flexibly to isolate IP
addresses between different multicast domains, so that the same multicast address can be used in
different multicast domains without causing collisions.
Available source-specific multicast (SSM) multicast
group addresses.
Administratively scoped multicast addresses, which
are for specific local use only.
Address of all hosts
Address of all multicast routers
Unassigned
Distance vector multicast routing protocol (DVMRP) routers
Open shortest path first (OSPF) routers
Open shortest path first designated routers (OSPF DR)
Shared tree routers
Shared tree hosts
RIP-2 routers
Mobile agents
DHCP server/relay agent
All protocol independent multicast (PIM) routers
Resource reservation protocol (RSVP) encapsulation
All core-based tree (CBT) routers
The specified subnetwork bandwidth management (SBM)
All SBMS
Virtual router redundancy protocol (VRRP)
Other protocols
1-7
Description
Description