Load Balancer Failover Modes

Load balancers support the following failover modes:

• Path failover

• Device failover or high availability (HA)

• Single device failover (non-HA)

A path failover occurs when one interface to the router fails. In that case, the path on the failed interface is automatically restored on the live interface. In a high availability setup, one load balancer device is on standby as the secondary load balancer, while the primary, active load balancer device handles processing. If the primary load balancer fails, the secondary load balancer automatically takes over processing. A single device failover situation is resolved manually through the replaceFailedDevice tool.