HP Auto Port Aggregation (APA) Release Notes HP-UX 11i v1, 11i v2, and 11i v3 (5900-2047, October 2011)

2 HP APA Overview for HP-UX 11i v2
This chapter provides information about the HP-UX 11i v2 (B.11.23.40.1) October 2011 release
of HP Auto Port Aggregation (APA) and LAN Monitor software.
This release of HP APA now supports HP Serviceguard version A.11.17 or later. HP Serviceguard
can use both link aggregates and failover groups (LAN_MONITOR mode). In addition, this release
also supports Nortel Split Multi-Link Trunking (SMLT) technology and improved HP Integrity virtual
machine support.
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.
In addition, HP APA provides automatic link failure detection and recovery, and optional support
for load balancing of network traffic across all of the links in the aggregation.
HP APA supports Serviceguard.
For more information, see the HP Auto Port Aggregation (APA) Administrator's Guide for HP-UX
11i v1 and 11i v2. To locate this document, go to the www.hp.com/go/hpux-networking-docs
product page. On this page, select HP-UX Auto Port Aggregation (APA) Software.
Failover Group
HP APA supports the creation of failover groups (link aggregates in LAN_MONITOR mode),
providing a failover capability for links. In the event of a link failure, LAN Monitor automatically
migrates traffic to an available, standby link (port or link aggregate) in the failover group.
Known Problems Fixed in This Version
Table 2 lists the known problem fixed in this release of HP APA B.11.23.40.1.
Table 2 Fixes in the HP APA B.11.23.40.1 Release
DescriptionDefect ID
The APA/LM statistics are not updated for 90 seconds after fail-back occurs.CR1001128905
Known Problems and Limitations
This section describes the known problems and limitations as known to HP at the time of publication.
If workarounds are available, they are included.
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 and Installation Requirements
This section describes the compatibility information and installation requirements for this release.
For information on specific installation instructions, see the HP Auto Port Aggregation (APA)
Administrator's Guide for HP-UX 11i v1 and 11i v2. To locate this document, go to the
10 HP APA Overview for HP-UX 11i v2