QoS policy

Policy conditions consist of a variety of selection criteria that act as traffic filters. Traffic can be filtered based on source and destination IP addresses, source and destination ports, protocol, inbound and outbound interfaces, application name, application specific data or application priority. Only packets that match the filter criteria are selected to receive the accompanying action. Policy rules can refer to several policy actions, but only one policy action is executed per policy scope. A given policy action may be referred to by several policy rules.

The type of policy defined is in general controlled by the policy scope value defined for the policy action. SD policies are an exception. SD policies are a subset of DS policies, so use the DS scope.

Although RSVP policies are installed into the TCP/IP stack, they are used only for collecting policy statistics. For policy use and limit enforcement, these policies are requested from the Policy Agent by the RSVP Agent, to apply to RSVP reservation requests from RSVP applications.