4.5.4 Mutual high availability
The mutual high availability feature of Load Balancer provides the administrator with the opportunity to use both Dispatcher servers in a high availability configuration, where both servers actively perform load balancing for a cluster and are the backup for each other. So, in a simple high-availability configuration, only one machine performs load balancing. In mutual high availability, both machines participate in load balancing.
For mutual high availability, client traffic is assigned to each Dispatcher server on a cluster address basis.
You have to configure a cluster for each node that is a primary Dispatcher (so you have at least two clusters in your environment). Each cluster can be configured with the NFA (non-forwarding address) of its primary Dispatcher. The primary Dispatcher server normally performs load balancing for that cluster. In the event of a failure, the other machine performs load balancing for both its own cluster and for the failed Dispatcher's cluster.
