multicast trees, multiple active cores, shared trees
Core-based multicast trees use less router state, but have significant drawbacks when compared to shortest-path trees, namely higher delay and poor fault tolerance. We evaluate the feasibility of using multiple independent cores within a shared multicast tree. We consider several basic designs and discuss how using multiple cores improves fault tolerance without sacrificing router state. We examine the performance of multiple-core trees with respect to single-core trees and find that adding cores significantly lowers delay without increasing cost. Moreover, it takes only a small number of cores, placed with a k-center approximation, for a multiple-core tree to have lower delay than a single-core tree with optimal core placement. We also find that traffic concentration is avoided as long as the load is spread among a set of cores. These results indicate that shared trees with multiple active cores are a viable alternative to shortest-path trees.
Original Publication Citation
Daniel Zappala and Aaron Fabbri, "An Evaluation of Shared Multicast Trees with Multiple Active Cores", IEEE International Conference on Networking, ICN'1, July 21.
BYU ScholarsArchive Citation
Zappala, Daniel and Fabbri, Aaron, "An Evaluation of Shared Multicast Trees with Multiple Active Cores" (2001). Faculty Publications. 568.
Physical and Mathematical Sciences
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