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Home | Seminars and Symposia | Past seminars/symposia: Wednesday, November 12, 2003

DTC Seminar Series

IP-based Restoration in the Sprint Backbone


Supratik Bhattacharyya
Sprint Advanced Technology Laboratory

Wednesday, November 12, 2003
10:30 am

404 Walter Library

BhattacharyyaDownload slides (pdf 1.62 MB) Large IP networks usually combine protection and restoration mechanisms at various layers of the protocol stack to minimize service disruption in the event of failures. Sprint has chosen an IP-based restoration approach for building a highly available tier-1 IP backbone. In this talk I will motivate and identify some of the design principles behind Sprint's decision. Then I will present an analysis of failure characteristics in Sprint's backbone, and efforts to reduce the restoration time for each failure. I will conclude the talk with a discussion on service availability in IP networks.



Supratik Bhattacharyya holds an engineering degree from Jadavpur University India, and M.S. and Ph.D. degrees in Computer Science from the University of Massachusetts, Amherst. Since completing his Ph.D. in 1999, he has been a member of the IP Research Group at the Sprint Advanced Technology Laboratory. His research interests cover various aspects of IP networks including measurement and monitoring, network availability and survivability, routing and traffic engineering, and multicasting.