Matching differentiated services PHBs to ATM service categories-the AF to VBR case
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Integrating Differentiated Services with ATM
IP in the edge and ATM in the core are commonplace in today’s internetworks. The IETF has proposed a new Quality of Service (QoS) mechanism namely Differentiated Services (DiffServ) for IP networks. On the other hand, QoS is an inherent feature in ATM. It is imperative that IP and ATM QoS interoperate efficiently to provide an end-to-end service guarantee. DiffServ provides a class of service n...
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ATM or Asynchronous Transfer Mode is a network transfer technique that supports a large variety of applications having diverse performance requirements and service. Traffic bandwidths and traffic types are supported by it from constant, fixed rate traffic to the traffic that is highly bursty. The delay bandwidth and loss requirements of the present day real time multimedia traffics greatly diff...
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The Assured Forwarding Per Hop Behavior (AF PHB) has been devised by the IETF Differentiated Services (DiffServ) working group to provide drop level differentiation. The intent of AF is to support services with different loss requirements, but with no strict delay and jitter guarantees. Another suggested use of AF is to provide differentiated support for traffic conforming to an edge conditioni...
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This document describes service classes configured with Diffserv and recommends how they can be used and how to construct them using Differentiated Services Code Points (DSCPs), traffic conditioners, Per-Hop Behaviors (PHBs), and Active Queue Management (AQM) mechanisms. There is no intrinsic requirement that particular DSCPs, traffic conditioners, PHBs, and AQM be used for a certain service cl...
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The Available Bit Rate (ABR) service category was defined for ATM networks in order to provide a minimal guaranteed rate while letting a user exploit additional unused capacity from other service categories. In this paper experiences with an implementation of a driver enabling ABR support and the steps needed to integrate it in an end system are described. Furthermore, the deployment of ABR in ...
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تاریخ انتشار 1999