Multicast performance measurement on a high-performance IP backbone

Authors:
R.E Beverly, IV;G.J Miller;K Thompson
Affiliations:
WorldCom, Advanced Internet Technology, 22001 Loudoun County Parkway, Ashburn, VA 20147, USA;WorldCom, Advanced Internet Technology, 22001 Loudoun County Parkway, Ashburn, VA 20147, USA;WorldCom, Advanced Internet Technology, 22001 Loudoun County Parkway, Ashburn, VA 20147, USA
Venue:
Computer Communications
Year:
2001

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Abstract

This paper describes an approach to IP multicast performance measurement on the National Science Foundation's very-high-speed Backbone Network Service (vBNS). Using OC-12c ATM attached workstations that act as either multicast senders or receivers distributed throughout the vBNS backbone, we create arbitrary topologies, generate synthetic IP multicast traffic and measure loss encountered. We present packet loss results as a function of time and as a function of router hop count (distribution tree depth). We analyze the multicast join latency incurred and consider both raw results and results with the loss due to the initiation of multicast state removed. We then correlate these loss measurements to the multicast distribution tree where results show less correlation than expected. We attribute various factors including unbalanced non-binary distribution trees, loss on the receiver links and the individual characteristics of different wide area links as factors affecting the correlation.