Contents

Add backup

Fill in the fields and click OK to activate high availability.

Port number

The number of a port that is unused on both Dispatcher machines that will be used for heartbeat messages. You must use the same port number for both the primary and backup machines.

Role

Choose between:

  • Primary
  • Backup
  • Both (mutual high availability feature)

Recovery strategy

Choose between:

  • Automatic--the primary machine will resume load balancing as soon as it comes back into service.
  • Manual--the primary machine will act as standby for the backup machine until you have manually forced the primary to takeover.

Heartbeat source address

Enter an intial heartbeat source address in either dotted decimal or host name format. The source address is the address of the high availability partner machine that sends heartbeats. This address should be defined on the physical adapter of the partner that you wish to use to monitor the health of the Dispatcher. You can define a source address for each physical adapter in the Dispatcher machine.

NOTE: For the mutual high availability feature (role of the dispatcher machine is both primary and backup), you need to specify the NFA (nonforwarding address) of the machine as the main heartbeat. Additional heartbeats can specify other network addresses of the machines.

Heartbeat destination address

Enter an intial heartbeat destination address in either dotted decimal or host name format. The destination address is the address of the high availability partner machine to which heartbeats and responses are sent. This address should be defined on the physical adapter of the partner that you wish to use to monitor the health of the Dispatcher. You can define a destination address for each physical adapter in the Dispatcher machine.

NOTE: For the mutual high availability feature (role of the dispatcher machine is both primary and backup), you need to specify the NFA (nonforwarding address) of the machine as the main heartbeat. Additional heartbeats can specify other network addresses of the machines.