HP FlexFabric 5950 series Configuration Manual page 17

Figure 4 IPv6 multicast format
0 7
0xFF
The following describes the fields of an IPv6 multicast address:
0xFF—The most significant eight bits are 11111111.

Flags—The Flags field contains four bits.

Figure 5 Flags field format
0 R P T
Table 4 Flags field description
Bit
0
R
P
T
Scope—The Scope field contains four bits, which represent the scope of the IPv6

internetwork for which the multicast traffic is intended.
Table 5 Values of the Scope field
Value
0, F
1
2
3
4
5
6, 7, 9 through D
8
E
11 15
Flags Scope
Group ID (112 bits)
Description
Reserved, set to 0.
•
When set to 0, this address is an IPv6 multicast address without an
embedded RP address.
•
When set to 1, 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, this address is an IPv6 multicast address not based
on a unicast prefix.
•
When set to 1, this address is an IPv6 multicast address based on a
unicast prefix. (The T bit must also be set to 1.)
•
When set to 0, this address is an IPv6 multicast address
permanently-assigned by IANA.
•
When set to 1, this address is a transient or dynamically assigned
IPv6 multicast address.
7
Meaning
Reserved.
Interface-local scope.
Link-local scope.
Subnet-local scope.
Admin-local scope.
Site-local scope.
Unassigned.
Organization-local scope.
Global scope.
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