Trafiko analisia

Modeling Packet Processing Time in a Multiprocessor Network Traffic Monitoring System

Luis Zabala, Armando Ferro, Alberto Pineda
The 2012 International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA '12). Las Vegas (Nevada), USA. July 16-19

<span lang="en">Nowadays traffic monitoring is a must for manypurposes (IDS, antivirus, QoS monitoring, network problem detection, etc.) Deployment of high speed networks implies problems with these kind of systems to be able to cope with all the traffic in the network. Therefore, it would be interesting to know in advance whether our system will be able to do its task correctly, or it needs more processing power. This paper presents a simulator for network traffic capturing systems that use commodity hardware and general purpose operating systems. In order to establish the different elements of the simulator we carried out an in depth study of the network capturing subsystem in the Linux kernel. We identified the different stages of the travel of packets from wire to application, as well as the particular behavior of the system and computational cost for each one of them. With this information we have built up a model that simulates these different stages of a capturing system. This model allows us to estimate the performance a network application will be able to achieve, when packet losses will start and where they will appear.</span>