3Com S7906E Configuration Manual page 961

Table 1-3 Some reserved multicast addresses
Address
224.0.0.1 All systems on this subnet, including hosts and routers
224.0.0.2 All multicast routers on this subnet
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 OSPF designated routers/backup designated routers
224.0.0.7 Shared Tree (ST) routers
224.0.0.8 ST hosts
224.0.0.9 Routing Information Protocol version 2 (RIPv2) routers
224.0.0.11 Mobile agents
224.0.0.12 Dynamic Host Configuration Protocol (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 Designated Subnetwork Bandwidth Management (SBM)
224.0.0.17 All SBMs
224.0.0.18 Virtual Router Redundancy Protocol (VRRP)
2) IPv6 multicast addresses
Figure 1-4 IPv6 multicast format
Referring to Figure 1-4, the meanings of the fields of an IPv6 multicast address are as follows:
0xFF: The most significant 8 bits are 11111111, indicating that this address is an IPv6 multicast
address.
Figure 1-5 Format of the Flags field
Flags: Referring to Figure 1-5, the following table describes the four bits of the Flags field.
1-8
Description