H3C S3100 Series Operation Manual page 281

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
Table 1-4 Description on the bits of the Flags field
Bit
0 Reserved, set to 0
When set to 0, it indicates that this address is an IPv6 multicast address without an
embedded RP address
R
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
P
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)
When set to 0, it indicates that this address is an IPv6 multicast address
permanently-assigned by IANA
T
When set to 1, it indicates that this address is a transient, or dynamically assigned IPv6
multicast address
Scope: 4 bits, indicating the scope of the IPv6 internetwork for which the multicast traffic is intended.
Possible values of this field are given in
Table 1-5 Values of the Scope field
0, 3, F
1
2
4
5
6, 7, 9 through D
8
Figure 1-5, the following table describes the four bits of the Flags field.
Value
Description
Table 1-5.
Reserved
Interface-local scope
Link-local scope
Admin-local scope
Site-local scope
Unassigned
Organization-local scope
1-8
Meaning