CoS rewrite rules: Packet marking schemes on a per-customer basis

Traditionally, packet marking in the Junos OS uses the forwarding class and loss priority determined from a BA classifier or multifield classifier. This approach does not allow for direct assignment of rewrite rules on a per-customer basis due to the limited number of combinations of forwarding class and loss priority. There is a packet marking scheme, called policy map, that allows the definition of rewrite rules on a per-customer basis. Policy maps are defined at the [edit class-of-service policy-map] hierarchy level and can be assigned to a customer through a firewall action, an ingress interface, or a routing policy.