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Summary: Prashant Rajvaidya
and Kevin C.Almeroth
University of California,
Santa Barbara
Multicast Routing
Instabilities
Native multicast is critical for scaling the delivery of high-bandwidth data, such as
audio and video,to multiple receivers.Until recently,however,multicast routing has
been unstable,thus making it difficult to ensure robust data delivery.The authors' in-
depth analysis of routing instabilities in the multicast infrastructure seeks to identify
underlying inconsistencies among routing views at different routers and characterize
instabilities by evaluating temporal and spatial variations in these views.Results are
based on multiprotocol border gateway protocol (MBGP) routing tables.
M
ulticast1
is one of the best available
service models for scalable, many-
to-many delivery of data on the
Internet. Multicast achieves scalability by
letting sources send a packet only once,
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