File draft-ietf-idmr-qosmic-00.ftxt,psg Designing QoSMIC A Quality of Service sensitive Mul.pdf

INTERNET-DRAFT Anindo Banerjea (U. of Toronto)Inter-Domain Multicast Routing Michalis Faloutsos (U. of Toronto)Expires: 1st October 1998 Rajesh Pankaj (QUALCOMM)File: draft-ietf-idmr-qosmic-00.ftxt,psgDesigning QoSMIC: A Quality of Service sensitive Multicast Internet protoColSTATUS OF THIS MEMOThis document is an Internet-Draft. Internet-Drafts are working documents of the Internet EngineeringTask Force (IETF), its areas, and its working groups. Note that other groups may also distribute workingdocuments as Internet-Drafts.Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced,or obsoleted by other documents at any time. It is inappropriate to use Internet- Drafts as reference materialor to cite them other than as work in progress.To view the entire list of current Internet-Drafts, please check the 1id-abstracts.txt listing containedin the Internet-Drafts Shadow Directories onftp.is.co.za (Africa), (Northern Europe),ftp.nis.garr.it (Southern Europe),munnari.oz.au (Pacic Rim), (US East Coast), (US West Coast). ABSTRACTWe present, QoSMIC, a multicast protocol for the Internet that supports QoS-sensitive routing, andminimizes the importance of a priori conguration decisions (such as core selection). The protocol is resource-ecient, robust, exible, and scalable. In addition, our protocol is provably loop-free.Our protocol starts with a resources-saving tree (Shared Tree) and individual receivers switch to a QoS-competitive tree (Source-Based Tree) when necessary. In both trees, the new destination is able to choosethe most promising among several paths. An innovation is that we use dynamic routing information withoutrelying on a link state exchange protocol to provide it. Our protocol limits the eect of pre-congurationdecisions drastically, by separating the management from the data transfer functions; administrative routersare not necessarily part of the tree. This separation increases the robustness, and exibility of