Traffic Policing Standards; Supported Standards For Policing - Juniper EX9200 Features Manual

CHAPTER 2

Traffic Policing Standards

Supported Standards for Policing

Copyright © 2016, Juniper Networks, Inc.
Supported Standards for Policing on page 13
Three-color policers are part of an assured forwarding (AF) per-hop-behavior (PHB)
classification system for a Differentiated Services (DiffServ) environment, which is
described and defined in the following RFCs:
RFC 2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6
Headers
RFC 2475, An Architecture for Differentiated Service
RFC 2597, Assured Forwarding PHB Group
RFC 2598, An Expedited Forwarding PHB
RFC 2698, A Two Rate Three Color Marker
In a DiffServ environment, the most significant 6 bits of the type-of-service (ToS) octet
in the IP header contain a value called the Differentiated Services code point (DSCP).
Within the DSCP field, the most significant 3 bits are interpreted as the IP precedence
field, which can be used to select different per-hop forwarding treatments for the packet.
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