On a per-packet basis as quickly as possible. Packetįorwarding is the relatively simple task that needs to be performed Made to separate the forwarding and routing components. Guided by the original design of the Internet where the decision was Other of which is just beginning to be understood. Major components, one of which is fairly well-understood and the The differentiated services approachĪims to speed deployment by separating the architecture into two Introductionĭifferentiated services are intended to provide a framework andīuilding blocks to enable deployment of scalable serviceĭiscrimination in the Internet. RFC 2474 Differentiated Services Field December 1998 1. Per-Hop Behavior Standardization Guidelines. 12Ĥ.2.2.4 Example Mechanisms for Implementing Class. 11 4.2.2.3 Using the Class Selector PHB Requirements. 11 4.2.2.2 The Class Selector PHB Requirements. 10 4.2.2 Subsuming IP Precedence into Class Selector. 10 4.2.1 IP Precedence History and Evolution in Brief. 9 4.2 Once and Future IP Precedence Field Use.
Historical Codepoint Definitions and PHB Requirements. Differentiated Services Field Definition. Set of packet forwarding treatments, or per-hop behaviors, isįor a more complete understanding of differentiated services, seeĪlso the differentiated services architecture. The TOS octet in IPv6, the Traffic Class octet. This document defines the IP header field, called the DS (forĭifferentiated services) field. Temporal behavior of marked packets need only be performed at network Setting of the DS field and conditioning of the Of delivering the specific packet forwarding treatment indicated by A differentiated services-compliant network node includesĪ classifier that selects packets based on the value of the DS field,Īlong with buffer management and packet scheduling mechanisms capable The requirements or rules of each service must be set throughĪdministrative policy mechanisms which are outside the scope of thisĭocument. RFC 2474 Differentiated Services Field December 1998 With the requirements or rules of each service. conditioning the marked packets at network boundaries in accordance using those bits to determine how packets are forwarded by the (autonomous system boundaries, internal administrative boundaries, setting bits in an IP header field at network boundaries Services can be constructed by a combination of: That can satisfy quantitative performance requirements (e.g., peakīandwidth) and those based on relative performance (e.g., "class"ĭifferentiation). May be either end-to-end or intra-domain they include both those Variety of services may be built from a small, well-defined set ofīuilding blocks which are deployed in network nodes. Without the need for per-flow state and signaling at every hop. Intended to enable scalable service discrimination in the Internet All Rights Reserved.ĭifferentiated services enhancements to the Internet protocol are
Distribution of this memo is unlimited.Ĭopyright (C) The Internet Society (1998). Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the
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NicholsĬategory: Standards Track Torrent Networking Technologiesĭefinition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers Updated by: 3168, 3260, 8436 Errata Exist Network Working Group K. RFC 2474: Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers
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