NorthStar Planner Policy-Based Routes Overview
The Policy-Based Routes chapter explains how to view and modify policy based routes. Policy based routing provides additional control above that of routing protocols. A policy can be applied to an interface so that packets coming in through the interface meeting a given criteria will be forwarded out to a given interface, tunnel, or next hop. The criteria that must be met, if any, is specified in a route map statement. The information that must be matched can be specified in an access list, such as source IP address, destination IP address, port numbers, and protocol. The route map statement also sets the outgoing interface, tunnel, or next hop.
Policy Based Routes can be used to implement QoS-specific routing, protocol-sensitive routing, source-sensitive routing, or routing based on dedicated links.