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Author Clifton, Christopher ♦ Fahmy, Sonia ♦ Avasarala, Srinivas R. ♦ Prabhakar, Venkatesh ♦ Bhargava, Bharat ♦ Mabib, Ahsan
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Abstract We design and cvaluate a simple and scalable system to verify Quality of Service (QoS) in a differentiated services domain. The system uscs a distributed edge-to-edge monitoring approach with measurement agents collecting information about delays. losses and thl-oughput. and reporting to a Service Level Agreement Monitor (SLAM). The SLAM detects potential service violations. bandwidth theft. denial of scrvice attacks, and flags the need to redimension the network domain or limit its users. Measurements n~ay be performed entirely edge-to-edge. or the core routers may pa~iicipate in logging packet drop infolmation. We compare the core-assisted and edge-to-edge schemes. and we extend network tomography-based loss inference mechanisms to cope with different drop precedences in a QoS network. We also develop a load-based service monitol-ins scheme which probes the appropriate edge routers for loss and throughput on demand. Simulation results indicate that the system detects attacks with reasonable accuracy. and is useful for dainaze control in both QoS-enabled and best effort network domains.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study