HP VPN Firewall Appliances High Availability Command Reference

139
Syntax
standby threshold enable-threshold disable-threshold
undo standby threshold
Default
Load balancing threshold is disabled.
Views
Interface view
Default command level
2: System level
Parameters
enable-threshold: Specifies the upper load balancing threshold. It indicates the percentage of the
available active-interface bandwidth that the traffic load must exceed for the standby interface to come
up for load balancing. The value for this argument is in the range of 1 to 99.
disable-threshold: Specifies the lower load balancing threshold. It indicates the percentage of the
available active-interface bandwidth that the traffic load must be less than for the standby interface in
load balancing to shut down. The value for this argument is in the range of 1 to 99. The disable-threshold
must be smaller than the enable-threshold.
Usage guidelines
The following is how backup/load balancing works:
• If the available bandwidth used for setting the thresholds is 0 kbps (the default value), the interface
backup module automatically obtains the actual bandwidth of the active interface to set the
thresholds. If the available bandwidth configured for setting the thresholds exceeds the actual
bandwidth on the interface, load balancing does not take effect.
• When the traffic on the active interface increases above the enable-threshold, the standby interface
starts to participate in load balancing. When the traffic on the active interface decreases below the
disable-threshold, the standby interface frequently switches it state from up and down. To avoid this
problem, HP recommends that you set the disable-threshold to lower than half of the
enable-threshold.
• You can only use the standby threshold command on active interfaces and after standby interfaces
are specified.
Examples
# Configure the enable-threshold of load balancing on interface GigabitEthernet 0/1 as 80 and the
disable-threshold as 20.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] standby threshold 80 20
Related commands
• standby interface
• standby bandwidth