HP-UX IPv6 Porting Guide (February 2007)

IPv6 Addressing
IPv6 Address Types
Chapter 2 9
IPv6 Address Types
Unicast Address
Figure 2-2 Unicast Address
Unicast addresses usually comprise a 64-bit prefix and a 64-bit interface ID.
Figure 2-3 Unicast Prefix
The 64-bit interface ID must be unique on the link. An interface ID often includes the
interface Link-Layer Address.
IPv6 Loopback Address
The loopback interface uses the IPv6 loopback address for self-testing, by sending IP
datagrams to itself. The IPv6 loopback address is: 0:0:0:0:0:0:0:1 (or more simply, ::1).