User-configurable traffic class map

Junos OS introduces a user-configurable input priority map, known as a traffic class map, that helps prioritize and classify input traffic entering a Packet Forwarding Engine during ingress oversubscription. You can define traffic class maps for a packet on the basis of the following CoS code points:

Differentiated Services code point (DSCP) for IP DiffServ

• IP precedence bits
• MPLS EXP bits
• IEEE 802.1p CoS bits
• IEEE-802.1ad drop eligible indicator (DEI) bits

You can associate the traffic class map to one of the following traffic classes:

• Real time
• Network control
• Best effort