US Patent 11374849 High availability router switchover decision using monitoring and policies

High availability router switchover decision are described using monitoring and policies. In one example, available network routing parameters are monitored. A change of one of the network routing parameters is detected. A parameter matrix of network routing parameters is updated in response to the detected change. The changed network routing parameters are applied to a policy in response to updating the parameter matrix and a switchover request is sent to a standby network node when the policy is mite by the changed network routing parameter.