Refer to the exhibit. During a planned upgrade lo a BIG-IP HA pair running Active/Standby, an outage to application traffic is reported shortly after the Active unit is forced to Standby Reverting…

In F5 HA configurations, 'Tag value' (often related to HA groups or failover preferences/priorities) on a device influences its behavior and ability to take over traffic groups during a failover. If the Standby device's tag value is improperly configured or too low, it might not correctly assume the Active role and process traffic, leading to an outage.

The issue occurred when the Active unit became Standby; modifying the Active unit's interface would not resolve a problem with the *newly active* (formerly Standby) device.

Modifying the Tag value on the *already working* Active device is not the solution for an outage caused by the *Standby* device failing to perform correctly when it became Active.

While an interface misconfiguration on the Standby device could cause an outage, simply changing 'the Interface to 1.1' is too vague and less directly related to failover logic than modifying a 'Tag value' that dictates HA behavior.