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RFC 3260 — New Terminology and Clarifications for Diffserv. (Updates RFC 2474, RFC 2475 and RFC 2597.) RFC 4594 — Configuration Guidelines for DiffServ Service Classes. RFC 5865 — A differentiated services code point (DSCP) for capacity-admitted traffic.
RFC 2474 (which was released in December 1998) reserved the first six bits of the DS (or IPv4 ToS) field for the Differentiated Services Code Point (DSCP), and RFC 3168 reserved the last two bits for Explicit Congestion Notification.
The bits of this field hold two values. The six most-significant bits hold the differentiated services field (DS field), which is used to classify packets. [2] [3] Currently, all standard DS fields end with a '0' bit. Any DS field that ends with two '1' bits is intended for local or experimental use. [4]
This is a partial list of RFCs (request for comments memoranda). A Request for Comments (RFC) is a publication in a series from the principal technical development and standards-setting bodies for the Internet, most prominently the Internet Engineering Task Force (IETF).
With: In December 1998, the IETF published RFC 2474 - Definition of the Differentiated services field (DS field) in the IPv4 and IPv6 headers, which replaced the IPv4 TOS field and the IPv4 Precedence field with the DS field.
Differentiated services provides an additional method to select outgoing interfaces, based on a field that indicates the forwarding priority of the packet, as well as the preference of the packet to be dropped in the presence of congestion. Routers that support differentiated service not only have to look up the output interface for the ...
During the development of the first version of the Internet Protocol in the 1970s, the initial experimental versions 1 to 3 were not standardized.
RFC 2638 from the IETF defines the entity of the Bandwidth Broker (BB) in the framework of differentiated services (DiffServ). According to RFC 2638, a Bandwidth Broker is an agent that has some knowledge of an organization's priorities and policies and allocates quality of service (QoS) resources with respect to those policies.