Some guidelines relating to the Use for HA checks option are below:

  • The standby unit will not become active unless it does not receive a health check message from the active unit. So, all interfaces with Use for HA checks must fail or be blocked.
  • The active unit will give up the role and become standby if any of its interfaces with Use for HA checks enabled fails.
  • In the past it was common practice to have a directly connected network cable between the two LoadMasters but this is no longer a supported configuration. This type of configuration causes the LoadMaster to think it is a production link and if one of the LoadMasters reboots, the other one fails too. This is why this type of setup is not supported.
  • If the Use for HA checks check box is grayed out it means that this is the only interface configured to be used for HA checks and it cannot be deselected.

To enable the Use for HA checks option, follow the steps below:

  1. Go to the WUI of the shared IP address.
  2. In the main menu, select System Configuration.
  3. Select the relevant interface.
  4. Select the Use for HA checks check box.

These steps can be repeated if you need to enable the Use for HA checks option on more than one interface.