The Fail Over Service (CORP-FOS) provides a technique used to assure minimual down time whan a Cdrfw experiences a resource or device failure.
A CDRFW™ fail over cluster consists of two nodes: one functioning as the active provider of IP services to the public client network, and the other (referred to as the inactive node) monitors those services and operates as a standby system. When any service on the active node becomes unresponsive, the inactive node becomes active and provides those services instead. Services are automatically started and stopped as needed during the transition. If the failed system comes back online it will become the new inactive node and monitor for failures on the now-active system.