HP ProCurve Series 6120 Blade Switches IPv6 Configuration Guide

IPv6 Addressing
Multicast Application to IPv6 Addressing
Bit Use
0 reserved
1 interface-local (loopback)
2 link-local (same topology as the corresponding link-local unicast scope)
3 reserved
4 admin-local (smallest administratively configured scope)
5 site-local (single site)
6 unassigned
7 unassigned
8 organization-local (multiple sites within the same organization)
9 unassigned
A unassigned
B unassigned
C unassigned
D unassigned
E global
F reserved
For example, the following prefix indicates multicast traffic with a tempo-
rary multicast address and a link-local scope:
ff12 or (binary) 1111 1111 0001 0010
■ group identifier: This field includes the last 112 bits of the multicast
address and contains the actual multicast group identity. (Refer to RFCs
3306, 4291, and 2375.)
Solicited-Node Multicast Address Format
The solicited-node multicast address the switch generates for a configured
unicast or anycast address is composed of a unique, 104-bit multicast prefix
(ff02:0:0:0:0:1:ff) and the last 24 bits of the subject address. For example, if a
VLAN interface is configured with a link-local address of
fe90::215:60ff:fe7a:adc0
then the corresponding solicited-node multicast address is
ff02:0:0:0:0:1:ff7a:adc0
For related information, refer to:
■ RFC 2375: IPv6 Multicast Address Assignments
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