Hitless Stacking Failover

Hitless stacking failover provides automatic failover from the active controller to the standby controller without resetting any of the units in the stack and with sub-second packet loss to hitless stacking-supported services and protocols.

For a description of the events that occur during a hitless failover, refer to What happens during a hitless stacking switchover or failover.

For a description of this feature’s impact on major system functions, refer to Supported hitless stacking protocols and services.

For an example of hitless failover operation, refer to Hitless stacking failover example.

For feature limitations and configuration notes, refer to Hitless stacking configuration notes and feature limitations.