What is a benefit of configuring BIG-IP devices in active-active high availability mode?

Active-active does not inherently reduce overload risk during failover - when one device fails, the remaining device must absorb all traffic, potentially causing overload, whereas active-standby can be sized to handle full load on a single unit.

In an active-active configuration, both BIG-IP units concurrently handle production traffic across different traffic groups or virtual servers. This ensures that 100% of the purchased hardware capacity is utilized at all times, unlike active-standby where the secondary device processes no traffic until a failover event.

Active-active increases troubleshooting complexity because traffic is distributed across both devices, making it harder to trace sessions and correlate logs compared to a single active device.

The ability to upgrade one member without disruption is a benefit of active-standby or rolling upgrade procedures, not specific to active-active mode.