Upgrading Licenses for a Stack

License updates for stack members can be entered from the active controller. As with standalone devices, the license install perpetual command is used to update licenses on a stack. Licenses can be installed on each stack member by referencing its stack unit ID in the command. The updates are retained and applied by the individual stack member, and related information is then shared with the active controller. If a stack unit is non-operational, license updates are applied when the unit returns to active mode. If a stack member goes down, it retains its own license information, but the active controller does not retain it.

The active and standby controllers for the stack store and sync license information. License information is retained during controller switchover or failover. When a device joins the stack, its license information is synced to the active and standby controllers.

In an ICX stack, Layer 3 Premium features can be enabled if all units in the stack have a Premium license installed. If a Layer 3 Premium feature is enabled, any unit that joins the stack without a Premium license becomes non-operational. Either the Premium feature must be disabled, or the unit must be upgraded with a Premium license to become operational.