HP-UX IPv6 Transport Administrator Guide HP-UX 11i v3 (5992-6426, May 2013)

Where <IPv6-Node-Address> is an IPv6 address and <Prefix-Length> is a
decimal value specifying how many of the leftmost contiguous bits of the address compose
the subnet prefix.
In Figure 8, prefix length 48 specifies that the leftmost 48 bits of the IPv6 address compose
the subnet prefix.
Figure 8 Example Prefix Length 48
Address Scope
Link-local An IPv6 addres s used on a single link.
Global An IPv6 address that uniquely identifies a node on the Internet such
that packets can be routed to the node from any other node on the
Internet.
Address Type
Unicast Identifies a single interface. Notable unicast addresses are:
Loopback ::1 Address internal to IPv6 stack
Unspecified :: Not a legally defined address
Anycast Identifies a group of interfaces, possibly belonging to different nodes. A
packet sent to an anycast address is delivered to only one of the interfaces
in the group.
Multicast Identifies a group of interfaces, possibly belonging to different nodes. A
packet sent to a multicast address is delivered to all the interfaces in this
group.
Neighbor Discovery
IPv6 hosts and routers use the IPv6 Neighbor Discovery Protocol to:
• advertise their link-layer address on the local link
• find neighbors’ link-layer addresses on the local link
• find neighboring routers able to forward IPv6 packets
• actively track which neighbors are reachable
• search for alternate routers when a path to a router fails
Neighbor Discovery 47