H3C Technologies H3C S3100V2 Series Switches - Manual (Page 15)

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Address Description
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 4 IPv6 multicast format
Group ID (112 bits)
0xFF Flags Scope
0 7 11 15 31
The following describes the meanings of the fields of an IPv6 multicast address:
• 0xFF—The most significant eight bits are 11111111, which indicates that this address is an IPv6
multicast address.
• Flags—The Flags field contains four bits.
Figure 5 Format of the Flags field
Table 4 Description on the bits of the Flags field
Bit Description
0 Reserved, set to 0
R
• When set to 0, it indicates that this address is an IPv6 multicast address without an
embedded RP address.
• When set to 1, it indicates that this address is an IPv6 multicast address with an embedded
RP address—the P and T bits must also be set to 1.
P
• When set to 0, it indicates that this address is an IPv6 multicast address not based on a
unicast prefix.
• When set to 1, it indicates that this address is an IPv6 multicast address based on a unicast
prefix—the T bit must also be set to 1.