Failure in a known state can address safety or security in accordance with the mission needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality, integrity, or availability in the event of a failure of the SDN controller. Preserving network element state information helps to facilitate continuous network operations minimal or no disruption to mission-essential workload processes and flows.
Review the SDN controller configuration to determine if it is configured to peer with one or more controllers in an active/active or active/passive failover mode. If the SDN controller is not configured to be deployed as a cluster in active/active or active/passive mode, this is a finding.
Configure the SDN controller to peer with one or more controllers in an active/active or active/passive failover mode.