HP-UX 11i December 2004 Release Notes

Internet and Networking Services
IPv6 Available on Software Pack
Chapter 12
257
IPv6 Available on Software Pack
What is IPv6?
new for
December 2001
Internet Protocol version 6 (IPv6) is a new generation of the Internet Protocol that is
beginning to be adopted by the Internet community. IPv6 is also referred to as “IPng” (IP
next generation). It provides the infrastructure for the next wave of Internet devices,
such as PDAs, mobile phones, and appliances. It also provides increased connectivity for
existing devices such as laptop computers.
The most visible difference between today’s commonly used version of IP (IP version 4)
and IPv6 is the larger address space supported by IPv6. IPv6 supports 128-bit internet
addresses, compared to the 32-bit internet address supported by IP version 4.
Additionally, IPv6 offers greater ease of configuration and manageability as well as
increased security.
Once the HP-UX 11i IPv6 software product bundle is installed on the server and the
IPv4 and IPv6 interface(s) are configured, the server is considered to be an IPv6/IPv4
“dual stack” implementation. This implies that IPv4 and IPv6 both run concurrently and
independently. The server can communicate with both IPv4 nodes and IPv6 nodes, and
can identify packets as being IPv4 or IPv6. A dual stack implementation supports both
IPv4 and IPv6 applications. Programmers can write IPv6 applications that communicate
with both IPv6 and IPv4 peers. Existing IPv4 applications will continue to work.
The following section lists HP-UX functionality that has been IPv6-enhanced. If an area
is not included in this list, then this functionality has not been IPv6-enhanced and can
only run on IPv4.
What’s Included in HP-UX 11i IPv6?
This section provides only a brief summary list of what is included in the HP-UX 11i
IPv6 software product bundle. For more detailed information, refer to the HP-UX 11i
IPv6 Release Notes (T1306-90004).
New and Changed Features
• IPv6/IPv4 Dual Stack Support.
• Transition Mechanisms. These enable IPv6/IPv4 dual stack hosts and routers to
connect with other IPv6/IPv4 dual stack hosts and routers over the existing IPv4
Internet. HP-UX 11i IPv6 supports the following transition mechanisms: configured
tunneling, automatic tunneling and “6to4.” With tunneling, IPv6 datagrams are
encapsulated within IPv4 packets.
• IPv6 Stateless address autoconfiguration. A mechanism where a host can
automatically assign an address to configure an interface.
• IPv6 Neighbor and Router Discovery and Duplicate Address Detection.
• TCP and UDP over IPv6, PMTUv6, ICMPv6, IPv6 MIBs, and Sockets APIs.
•New netconf-ipv6 file. Used to store IPv6 settings (similar to IPv4's netconf file).
• Network-Interface Administration Utilities for both IPv4 and IPv6: