| Publisher | Purdue University | ||
|---|---|---|---|
| Format | 180.9KB PDF | Date added | 27 Aug 2009 |
| Topics | SLA, Bandwidth Issues, Quality of Service | ||
| Downloads | 16 | ||
The authors design and evaluate a simple and scalable system to verify Quality of Service (QoS) in a differentiated services domain. The system uses a distributed edge-to-edge monitoring approach with measurement agents collecting information about delays, losses and throughput, and reporting to a Service Level Agreement Monitor (SLAM). The SLAM detects potential service violations, bandwidth theft, denial of service attacks, and flags the need to re-dimension the network domain or limit its users. Measurements may be performed entirely edge-to-edge, or the core routers may participate in logging packet drop information. The authors compare the core-assisted and edge-to-edge schemes, and extend network tomography-based loss inference mechanisms to cope with different drop precedence in a QoS network.
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