HP-UX 11i Version 2 Release Notes (October 2003)

Internet and Networking
Network Transport (ARPA)
Chapter 6
165
Performance
NetTL's performance is improved, as the disk write is now done in the kernel and NetTL
binds the disk write thread to a specific CPU.
Documentation
The nettl (1M) and netfmt (1M) manpages have been updated with IPv6 and new Tracing
Framework related changes.
For further information, see the Driver Development Guide, available from the Developer
and Solution Partner Program (DSPP) at http://h21007.www2.hp.com/dev.
Obsolescence
HP-UX 11i v2 is the last release in which nettladm is supported.
Network Transport (ARPA)
The ARPA services are a subset of the networking services originally developed by the
University of California at Berkeley for the Advanced Research Projects Agency (ARPA).
ARPA services have become a de facto standard for multivendor network
communication.
ARPA Transport provides support for TCP/IP and Sockets. It also provides commands for
administering TCP/IP.
(For information about IPv6 support, see “IPv6 Support” on page 149.)
Summary of Change
Changes made to HP-UX ARPA Transport for HP-UX 11i v2 include the following:
• Support for the HP-UX 11i v2 enhancements of HP-UX DLPI
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 enhancements of HP-UX DLPI to the
Streams interface to provide a richer feature set for network stack feature options.
For more information, please see “HP-UX Data Link Provider Interface (DLPI)” on
page 126.
• Enhancements to CKO (Check-sum Offload) interfaces between HP-UX 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.