Policy-based management involves the following:
Developing a set of policies (rules) that describe the desired network configuration.
Baselining your current network. The baseline data is used to confirm that the network is capable of handling a particular policy, and for other tasks such as long-term planning.
Using tools that translate policies into individual device-configuration changes. These configuration changes can then be applied to the affected devices.
Reporting on whether the policy is being met. Whether the policy was not implemented correctly or a subsequent change undoes a previously implemented policy, you need a method to validate that things work as you expected. This validation is achieved ...