A Scalable Architecture for Monitoring and Visualizing Multicast Statistics
DSOM '00 Proceedings of the 11th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management: Services Management in Intelligent Networks
Challenges of Integrating ASM and SSM IP Multicast Protocol Architectures
IWDC '01 Proceedings of the Thyrrhenian International Workshop on Digital Communications: Evolutionary Trends of the Internet
Multicast Routing Instabilities
IEEE Internet Computing
Supporting multicast deployment efforts: a survey of tools for multicast monitoring
Journal of High Speed Networks
Real-time multicast network monitoring
APNOMS'07 Proceedings of the 10th Asia-Pacific conference on Network Operations and Management Symposium: managing next generation networks and services
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The multicast infrastructure has transitioned to a topology that now supports hierarchical routing. Instead of a flat virtual topology originally called the Multicast Backbone (MBone) there now exists a hierarchy where routing information is exchanged between autonomous systems (ASes). In today's multicast infrastructure reachability problems are common. Unlike in the MBone, the possibility of limited connectivity between domains is now possible. We present a system called sdr-monitor. This tool collects session directory information from numerous places around the world and presents an application layer view of reachability. Using data collected over the last year, we present an analysis of long term reachability characteristics for the global multicast infrastructure. Our findings are that overall reachability is generally quite poor. However, having identified some of the reasons, we believe there is not a fundamental infrastructure problem, but rather protocol bugs and a lack of management tools.