This event is raised when pool member of load balancer is down. Ensure that pool member has not been disabled by the administrator. Ensure that pool/pool-member uses the correct Health Monitors which are getting required responses from the backend server. Ensure that backend server used by this pool member is functional. For more details, log into Load Balancer UI, navigate to Local Traffic -> Pools -> Pools List. Also check documentation at https://support.f5.com/csp/article/K12531 Alternatively, you can log into VMware Aria Operations for Networks UI and search 'Pool Member where state = DISABLED'. For more details about this event, please log into VMware Aria Operations for Networks, navigate to Settings -> Events