HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004, rev 2)

IPv6 Addressing and Concepts
IPv6 Address Formats
Chapter 6 57
To indicate a subnetwork address, IPv6 uses subnet prefixes similar to
IPv4 CIDR format. Figure 6-1shows a 128-bit IPv6 node address with a
64-bit subnet prefix.
Figure 6-1 IPv6 128-bit Addresses; HP-UX Default Prefix 64
An IPv6 node address and its subnet prefix length can be combined in
the following format:
< IPv6-Node-Address >/< Prefix-Length >
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 6-2, prefix length 48 specifies that the leftmost 48 bits of the
IPv6 address compose the subnet prefix.
Figure 6-2 Example Prefix Length 48
0 12864
3ffe:ffff:101::230:6eff:fe04:d9ff/48
0 12848