Enabling IP-Multicast in Differentiated Services Networks
نویسندگان
چکیده
The Differentiated Services approach is currently intensively discussed in the Internet community. It will also bring benefits for multicast applications that need quality of service support. For instance, a highly reliable multicast can be provided based on Expedited Forwarding. However, current efforts mainly concentrate on unicast services, whereas multicast services have not been addressed in a very detailed manner yet. This article illustrates some of the problems which will arise when IP Multicast is used in Differentiated Services networks without taking special provisions into account for supplying it. Those problems mainly lead to situations in which other service users are affected adversely. In order to retain the benefits of the DiffServ approach, a quite simple and scalable solution for those problems is required, not resulting in additional complexity or costs in a DiffServ domain. The proposed solution in this paper requires only an additional entry for the DiffServ Codepoint in the multicast routing table and some support by management mechanisms. The discussion of the related problems and presentation of the solution is illustrated and affirmed by some measurements with IP Multicast groups using Expedited Forwarding.
منابع مشابه
INTERNET-DRAFT R. Bless Expires: March 2000 K. Wehrle Universitaet Karlsruhe (TH) September 1999 IP Multicast in Differentiated Services Networks
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تاریخ انتشار 2000