HP Auto Port Aggregation Administrator's Guide HP-UX 11i v3 (766140-001, March 2014)

Figure 5 Sample Server-to-Server Configuration (Back-to-Back)
HP APA 2-4 Port
Link Aggregation
LAN Monitor for high availability
Figure 6 (page 21) shows a sample LAN Monitor mode configuration. These link aggregations
provide high availability network access with an active link and a standby link.This configuration
has the following characteristics:
• The failover group active link carries network traffic until it or its link partner fails. In that event,
the standby link takes over the responsibility for delivering network traffic. If the previous active
link is configured with a higher port priority than the current active link, when it recovers it
resumes being the active link delivering the network traffic. If the port priorities are the same,
the current active link continues as the active link.
• The active and standby links must both be the same type of device: Gigabit or 10 Gigabit .
• Failover group (LAN_MONITOR mode) can be connected to any switch. The ports must be
cabled to a switch and the switch ports must not be configured for an aggregation.
• Dual switches (as used in Figure 6) are not required. But dual switches provides a more reliable
network environment by removing single points of failure. Both switches must be on the same
subnet.
20 Configuring APA