1-8Address Description224.0.0.7 Shared Tree (ST) routers224.0.0.8 ST hosts224.0.0.9 Routing Information Protocol version 2 (RIPv2) routers224.0.0.11 Mobile agents224.0.0.12 Dynamic Host Configuration Protocol (DHCP) server/relay agent224.0.0.13 All Protocol Independent Multicast (PIM) routers224.0.0.14 Resource Reservation Protocol (RSVP) encapsulation224.0.0.15 All Core-Based Tree (CBT) routers224.0.0.16 Designated Subnetwork Bandwidth Management (SBM)224.0.0.17 All SBMs224.0.0.18 Virtual Router Redundancy Protocol (VRRP)2) IPv6 multicast addressesFigure 1-4 IPv6 multicast formatReferring to Figure 1-4, the meanings of the fields of an IPv6 multicast address are as follows:z 0xFF: The most significant 8 bits are 11111111, indicating that this address is an IPv6 multicastaddress.Figure 1-5 Format of the Flags fieldz Flags: Referring to Figure 1-5, the following table describes the four bits of the Flags field.Table 1-4 Description on the bits of the Flags fieldBit Description0 Reserved, set to 0Rz When set to 0, it indicates that this address is an IPv6 multicast address withoutan embedded RP addressz When set to 1, it indicates that this address is an IPv6 multicast address with anembedded RP address (The P and T bits must also be set to 1)Pz When set to 0, it indicates that this address is an IPv6 multicast address notbased on a unicast prefixz When set to 1, it indicates that this address is an IPv6 multicast address basedon a unicast prefix (the T bit must also be set to 1)
