HP 6125G Configuration Manual page 18

Address Description
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)
IPv6 multicast addresses
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Figure 4 IPv6 multicast format
The following describes the fields of an IPv6 multicast address:
0xFF—The most significant eight bits are 1 1 1 1 1 1 1 1, which indicates that this address is an IPv6
multicast address.
Flags—The Flags field contains four bits.
Figure 5 Flags field format
Table 4 Flags field description
Bit
0
R
P
T
Scope—The Scope field contains four bits, which indicate the scope of the IPv6 internetwork for
which the multicast traffic is intended.
Description
Reserved, set to 0.
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When set to 0, it indicates that this address is an IPv6 multicast address without an
embedded RP address.
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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.)
•
When set to 0, it indicates that this address is an IPv6 multicast address not based on
a unicast prefix.
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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.)
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When set to 0, it indicates that this address is an IPv6 multicast address
permanently-assigned by IANA.
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When set to 1, it indicates that this address is a transient, or dynamically assigned
IPv6 multicast address.
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