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In certain configurations, Virtual Clustered Multiprocessing (vCMP) guests running on a BIG-IP 12.1.0 vCMP host may experience a lack of CPU resources for essential BIG-IP processes, resulting in an unexpected active-active state or an unexpected failover. For more information, refer to SOL41494015: A vCMP guest may experience a lack of CPU resources due to vCMP host processes assigned with an incorrect priority.

Download the F5 BIG-IP Access Policy Manager Operations Guide for a detailed collection of use cases, troubleshooting suggestions, and concise illustrations that provide greater insight into the BIG-IP APM module.

Download the F5 BIG-IP TMOS Operations Guide for a detailed collection of F5-suggested practices for maintaining and monitoring your BIG-IP environment.