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Supported CoS Standards

Junos OS substantially supports the following standards for class of service (CoS).

  • IEEE Standard 802.1D, IEEE Standard for Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges

    This document discusses Quality of Service (QoS) at the MAC level, often referred to as 802.1p.

  • RFC 2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers

  • RFC 2597, Assured Forwarding PHB Group

  • RFC 2598, An Expedited Forwarding PHB

The following RFCs do not define standards, but provide information about CoS and related technologies. The IETF classifies them as “Informational.”

  • RFC 2475, An Architecture for Differentiated Services

  • RFC 2697, A Single Rate Three Color Marker

  • RFC 2698, A Two Rate Three Color Marker

  • RFC 2983, Differentiated Services and Tunnels

  • RFC 3140, Per Hop Behavior Identification Codes

  • RFC 3246, An Expedited Forwarding PHB (Per-Hop Behavior)

  • RFC 3260, New Terminology and Clarifications for Diffserv