New for the HP-UX 11i v2 Release

Transport support for IPv6

IPv6 is the next generation Internet Protocol. IPv6 requires support from hosts and routers. HP-UX 11i v2 IPv6 transport software provides host support for IPv6.

With only a few configuration steps, an IPv6 interface can be enabled, and you can use the functional features of IPv6 and IPv6-enhanced components for HP-UX 11i v2.

	NOTE: The following software currently offers IPv6 support: Transport, Internet Services, DCE, DLPI, FDDI, SAM-NNC, Libc, Commands, Desktop (CDE), X11R6-based applications, EMS, Online Diagnostics, SNMP, nettl, IPSec, Kerberos Client, Service Guard, Glance, HP-UX Secure Shell, Apache and JVM. Refer to product-specific documentation for more information.

If you are not planning to use IPv6 software, there is no impact to you. Even though the software is included, other than a few new files and man pages, there are no actions required to “not use” IPv6.

To learn more about IPv6 transport on HP-UX 11i v2, refer to the following documentation, all available at:http://docs.hp.com/hpux/netcom/index.html#IPv6

	NOTE: This Guide only covers IPv4 related transport information. It does not cover IPv6 related transport information.

Transport Support for HP-UX 11i v2 DLPI enhancements

An OOP (Options negotiations and Out-of-Packet) header has been added to the front of all IP packets for both inbound packets from DLPI layer and outbound packets to DLPI layer. This change supports the HP-UX 11i v2 DLPI enhancements to the Streams Interface to provide a richer feature set for network stack feature options.

Enhancements to CKO (Check-sum Offload) interfaces between transport and DLPI.

This change makes the CKO interfaces more general with respect to the types of checksum offload hardware that HP will support, and adds sufficient flexibility to the interface that supports checksum offload for future transport protocols. This change incorporates the DLPI OOP header to carry the type of checksum offload and the offloaded checksum itself.

The transport internal kernel header file, net/cko.h has been modified to support this enhancement. Kernel IP Stream modules that previously used options for fastpath negotiation features or looked into network data packets in previous versions must make changes and recompile for HP-UX 11i v2.