HP 6200YL - Manual (Page 66)

IPv6 Addressing
Multicast Application to IPv6 Addressing
4 admin-local (smallest administratively configured scope)
Bit Use
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 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
■ RFC 3306: Unicast-Prefix-based IPv6 Multicast Addresses
■ RFC 3956: Embedding the Rendezvous Point (RP) Address in an IPv6
Multicast Address
■ RFC 3177: IAB/IESG Recommendations on IPv6 Address Allocations to
Sites
3-22