Management device and managed device in policy based management system

摘要

Provided is a policy based management system such that a policy enforced by each router (a managed device) in a network can be optimally adjusted in real time according to a traffic usage. At a managed device 3 in a network NT, there is provided: a policy enforcement means 31 for enforcing policy information distributed from a management device 2, thereby controlling a traffic; a policy evaluation means 32 for evaluating a policy based on policy evaluation information distributed from the management device 2; and a policy adjustment means 33 for dynamically adjusting the policy based on the policy adjustment information distributed from the management device 2 and the evaluation result caused by said evaluation means.