Quantile sampling for practical delay monitoring in Internet backbone networks

Quantile sampling for practical delay monitoring in Internet backbone networks

Point-to-point delay is an important network performance measure as it captures service degradations caused by various events. We study how to measure and report delay in a concise and meaningful way for an ISP, and how to monitor it efficiently. We analyze various measurement intervals and potential metric definitions. We find that reporting high quantiles (between 0.95 and 0.99) every 10–30 m...

A Practical Approach for Providing Qos in the Internet Backbone

This article describes a practical approach for providing quality of service in the Internet backbone. The approach considers both technical and economic factors. We first present network service provider (NSP) billing models and how NSPs provision their networks. We then analyze causes of QoS-related problems, and describe a practical approach for providing QoS. This approach makes use of good...

Addressing Practical Challenges for Anomaly Detection in Backbone Networks

Network monitoring has always been a topic of foremost importance for both network operators and researchers for multiple reasons ranging from anomaly detection to traffic classification or capacity planning. Nowadays, as networks become more and more complex, traffic increases and security threats reproduce, achieving a deeper understanding of what is happening in the network has become an ess...

Monitoring and Failure Localization in the Optical Internet Backbone

Delay Monitoring in ATM Networks