att_abstract={{IP multicast, after spending much of the last 20 years as
the subject of research papers, protocol design efforts and
limited experimental usage, is finally seeing significant deployment in production networks. The efficiency afforded
by one-to-many network layer distribution is well-suited to
such emerging applications as IPTV, file distribution, conferencing, and the dissemination of financial trading information. However, it is important to understand the behavior
of these applications in order to see if network protocols are
appropriately supporting them. In this paper we undertake
a study of enterprise multicast traffic as observed from the
vantage point of a large VPN service provider. We query
multicast usage information from provider edge routers for
our analysis. To our knowledge, this is the first study of production multicast traffic. Our purpose is both to understand
the characteristics of the tra�c (in terms of �ow duration,
throughput, and receiver dynamics) and to gain insight as
to whether the current mechanisms support multicast VPNs
can be improved. Our analysis reveals several classes of multicast traffic for which changes to the underlying protocols
may yield benefits.}},
	att_authors={lb7179, ag1971, ss2864},
	att_copyright_notice={{(c) ACM, 2009. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in ACM SICOMM 2009 {{, 2009-08-17}}.}},
	att_tags={Multicast, Enterprise, IP routing},
	author={Elliott Karpilovsky and Lee Breslau and Alexandre Gerber and Subhabrata Sen},
	institution={{in Proc. of ACM SIGCOMM Workshop: Research on Enterprise Networking (WREN)}},
	title={{Multicast Redux: A First Look at Enterprise Multicast Traffic}},