HP Auto Port Aggregation Administrator's Guide for HP-UX 11i v3 December 2007

Figure 3-5 Sample Hot Standby Configuration for High Availability
HP APA 2-Port Hot
Standby Link Aggregation
Switch
or Hub
Switch
or Hub
PowerRun Attn. Fault Remote
Primary
Standby
Server-to-Server with Switch (Not Recommended)
Figure 3-6 (page 33) shows a sample server–to–server HP APA link aggregation configuration
with a switch between the servers. This configuration will not work as intended for the following
reasons:
• The switch nullifies any load balancing of network traffic provided by HP APA.
• The switch uses a MAC address load-balancing algorithm. Because the servers' link
aggregations have fixed MAC addresses, the switch will not load balance; it will only transmit
data on one physical link.
32 Configuring APA