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High Availability (HA)
Feature Description
8
HA WUI Options
See below for descriptions of the various HA-related fields in the LoadMaster WUI.
8.1.1
Interfaces
If the unit is part of an HA configuration, the following screen will be displayed when one of the
interfaces is clicked.
Figure 8-1: Network Interface options
This screen tells the user:
The IP address of this LoadMaster
The HA shared IP address. This is the IP address used to configure the pair.
The IP address of the paired machine
Whether or not this interface is enabled for HA health-checking
The speed of the link (automatically detected)
Any alternate addresses on this interface
8.1.1.1
“Use for HA checks”
Some key points to note about this option are below:
The
Use for HA checks
check box must be selected on at least one interface that has
connectivity from HA1 to HA2.
If the
Use for HA checks
check box is greyed out it means that this is the only interface
configured to be used for HA checks and cannot be deselected.
This option should include at least one production interface, because if HA checks are
only selected on non-production interfaces, the backup unit will not notice if a
production interface goes down and will not take over for the incapacitated unit.
In a hardware configuration, if a direct cable is deployed between both units over eth1
and IP addresses have been set in the interface (and
Use for HA Checks
is enabled on
that interface) this causes problems because the LoadMaster will think it is a production
link and if one of the LoadMasters reboot, the other will fail too.
