IETF RFC 2474 PDF

Google Network Working Group D. Grossman Request for Comments: Motorola, Inc. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

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Google Network Working Group D. Grossman Request for Comments: Motorola, Inc. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. All Rights Reserved. Abstract This memo captures Diffserv working group agreements concerning new and improved terminology, and provides minor technical clarifications.

When RFCs and advance on the standards track, and RFC is updated, it is intended that the revisions in this memo will be incorporated, and that this memo will be obsoleted by the new RFCs.

Introduction As the Diffserv work has evolved, there have been several cases where terminology has needed to be created or the definitions in Diffserv standards track RFCs have needed to be refined. Some minor technical clarifications were also found to be needed. This memo was created to capture group agreements, rather than attempting to revise the base RFCs and recycle them at proposed standard. RFC has been obsoleted by RFC , and clarifications agreed by the group were incorporated in that revision.

There also could be other technical considerations in such an agreement e. It was therefore agreed that the notions of SLAs and TCAs would be taken to represent the broader context, and that new terminology would be used to describe those elements of service and traffic conditioning that are addressed by Diffserv.

Note that the definition of "Traffic stream" is unchanged from RFC A traffic stream can be an individual microflow or a group of microflows i. RFC defines a "Service Provisioning Policy as "a policy which defines how traffic conditioners are configured on DS boundary nodes and how traffic streams are mapped to DS behavior aggregates to achieve a range of services. Therefore, the relationship between an SLS and a service provisioning policy is that the latter is, in part, the set of rules that express the parameters and range of values that may be in the former.

Further note that this definition is more restrictive than that in RFC

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Google Network Working Group K. Baker Cisco Systems D. Please refer to the current edition of the "Internet Official Protocol Standards" STD 1 for the standardization state and status of this protocol. Distribution of this memo is unlimited. All Rights Reserved. Abstract Differentiated services enhancements to the Internet protocol are intended to enable scalable service discrimination in the Internet without the need for per-flow state and signaling at every hop. A variety of services may be built from a small, well-defined set of building blocks which are deployed in network nodes.

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References to rfc2474

Baker Cisco Systems D. Please refer to the current edition of the "Internet Official Protocol Standards" STD 1 for the standardization state and status of this protocol. Distribution of this memo is unlimited. All Rights Reserved. Abstract Differentiated services enhancements to the Internet protocol are intended to enable scalable service discrimination in the Internet without the need for per-flow state and signaling at every hop. A variety of services may be built from a small, well-defined set of building blocks which are deployed in network nodes.

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Differentiated services

Carlson Sun Microsystems E. Davies Nortel UK Z. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. All Rights Reserved. Abstract This document defines an architecture for implementing scalable service differentiation in the Internet. Packets are classified and marked to receive a particular per-hop forwarding behavior on nodes along their path.

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Background[ edit ] Modern data networks carry many different types of services, including voice, video, streaming music, web pages and email. Many of the proposed QoS mechanisms that allowed these services to co-exist were both complex and failed to scale to meet the demands of the public Internet. Traffic management mechanisms[ edit ] DiffServ is a coarse-grained, class-based mechanism for traffic management. In contrast, IntServ is a fine-grained, flow-based mechanism.

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