In the event of a pool or site failure, the first consideration must be of the Central Management Store (CMS). The CMS must be functional in order to provide failover of any other services. If a Front End Server pool has failed, or the site hosting that pool has failed and it was running the CMS, the CMS first must be failed to the secondary pool. The CMS is backed up as part of the pool pairing configured in earlier steps. Figure 15.15 provides an overview of the configuration to be used in the examples that follow. Pool A is currently running the CMS, and Pool A will be the failing pool.