F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Appendix Protocol Reference-6PW100

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Address Description
224.0.0.12 DHCP server/relay agent.
224.0.0.13 All PIM routers.
224.0.0.14 RSVP encapsulation.
224.0.0.15 All CBT routers.
224.0.0.16 SBM.
224.0.0.17 All SBMs.
224.0.0.18 VRRP.
• IPv6 multicast addresses:
Figure 39 IPv6 multicast format
The following describes the fields of an IPv6 multicast address, as shown in Figure 39:
{ 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, as shown in Figure 40 and described in Table 10.
Figure 40 Flags field format
Table 10 Flags field description
Bit Descri
p
tion
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.)
T
• When set to 0, it indicates that this address is an IPv6 multicast
address permanently-assigned by IANA.
• When set to 1, it indicates that this address is a transient, or
dynamically assigned IPv6 multicast address.