Incorporating priority scheme in IPv6 over ATM networks

An effective approach to support multiple QoS classes in IPV6 running over ATM networks is implemented by mapping the priority field of IPV6 into the ATM format. Such a scheme might not be necessary for simple congestion cont rol in a network of equal capacity links, however, it might be important fo r multicasting to destinations reachable through a very diverse capacity ne twork. When network congestion occurs, the cell loss requirements for diffe rent services can be satisfied by selectively discarding low priority cells . As the multi-priority scheme used in IPv6 is a "differentiated service" m echanism to enhance the QoS by best effort, its performance is certainly af fected by the background traffic when these multi-priority traffic are mult iplexed at the ATM level. This paper focuses on the performance with multip riority scheme under different traffic conditions to determine the loss cha racteristics. The expected results are how QoS is affected and how priority can be given for more important traffic in the case of congested network. (C) 1999 Elsevier Science B.V. All rights reserved.