HP Auto Port Aggregation (APA) Release Notes for HP-UX 11i v1 and v2 May 2005

2 Release Notes for HP-UX 11i v2
This document provides information about the HP-UX 11i v2 (B.11.23.05) September 2004 release of HP Auto Port
Aggregation (APA) and LAN Monitor software.
Announcement
This release of HP APA now supports TSO (TCP Segmentation Offload) and 64-bit statistics.
Auto Port Aggregation
HP APA is a software product that creates link aggregates, often called "trunks," which provide a logical grouping of
two or more physical ports into a single "Fat-Pipe." Network traffic is load balanced across all of the links in the
aggregation, which allows you to build large bandwidth logical links into the server that are highly available and
completely transparent to the client and server applications.
Two additional features are automatic link failure detection and recovery, as well as optional support for load balancing
of network traffic across all of the links in the aggregation. This allows you to build large bandwidth "logical" links into
the server that are highly available and completely transparent to the client and server applications.
HP APA supports Serviceguard with certain conditions. See the HP Auto Port Aggregation (APA) Support Guide for more
information.
LAN Monitor
The LAN Monitor mode of HP APA provides a failover capability configuration tools similar to Serviceguard; however,
LAN Monitor does not support HP Serviceguard. In the event of link failure, LAN Monitor will automatically migrate the
data flow from the primary link to one of the standby links in the failover group.
What's in This Version
The B.11.23.05 version of HP APA:
• Supports the TSO (TCP Segmentation Offload), aka Large Send, feature if an aggregate is created with Ethernet
cards that all support TSO or if the active port in a LAN Monitor failover group supports TSO.
• Supports 64-bit MIB (RFC 2863) statistics if all the interfaces within a link aggregation or failover group support
64-bit statistics.
• Enables you to add and remove DOWN ports to and from a link aggregation, and to create and delete a failover
group that has a DOWN port.
See the HP Auto Port Aggregation (APA) Support Guide (HP Part Number J4240-90031) for more information on the
new features and how to use them.
Known Problems and Workarounds
This section describes the known problems and workarounds for this release.
Known Problems with Switches
▲ 3Com SuperStack II Switches
To interoperate with the switch, disable the Trunk Control Message Protocol (TCMP) on all of the ports that are
being used with HP Integrity servers.
Compatibility Information and Installation Requirements
This section describes the compatibility information and installation requirements for this release.
First-time Installation
For an initial HP APA installation, two files, hp_apaconf and hp_apaportconf are placed in /etc/rc.config.d.
The MANUAL default mode will be used.
Required Patches
HP APA requires patch PHKL_31500 or its superseding patch.
You can download patches from the following Web site:
http://www2.itrc.hp.com/service/patch/mainPage.do
Announcement 7