When a BIG-IP system transitions from active to standby state or standby to active state, a message is displayed on the LCD display indicating the amount of time that has passed since the state transition occurred.
The BIG-IP system transitioning from standby to active displays a message similar to one of the following examples:
xxS unit going active
xxM unit going active
The BIG-IP system transitioning from active to standby displays a message similar to one of the following examples:
xxS unit going standby
xxM unit going standby
In these messages, S or M indicates the units in which time is measured: S indicates seconds, M indicates minutes. The xx characters represent the number of minutes or seconds the device has been in the current state. For example, a device that transitioned to the active state 15 minutes ago displays the following message:
15M unit going active
Note: These messages may appear on standalone systems or on members of a redundant pair.
Note: To determine the cause of an unexpected state change, examine the system log files.