Estimación de ancho de banda disponible por generación de paquetes de prueba a través de NetFPGA

Abstract

Estimate the available bandwidth required of appropriate measurements and analysis of packet flows produced and the measures contained in them, errors associated with generating and receiving test packets cannot be controlled and are outside the scope of tools estimation. Incorrect timestamp of test packets, using standard network card, the not using the real capacity of transmission of the network interfaces, receiving packets out of order, replication, packet corruption, among others, hinder the correct measurement of available bandwidth. The interchange of process in the operating system ago to be added unnecessary time between sending test packets and therefore are added errors in estimating the available bandwidth. The purpose of this article is to design a mechanism that allows for the generation of test packets at the hardware level using a technology called NetFPGA. This platform allows you to modify their behavior by having programmable logic arrays to generate and transmit packets to the link speed and in turn, interact with the software tool called Traceband estimate. The results raised the various modules for generating test packets and dialing the timestamp sent to the RAM of the NetFPGA; In addition to describing how the NetFPGA and Traceband must communicate it is through Traceband Register module.