Large Flow Detection and Delay Measuring for Multipath Routing over SDN

Abstract

The traditional single path routing can cause imbalanced link utilization and is not efficient for all traffic types such as long-lived large flows. Moreover, it can lead to low network throughput and high network latency. Traffic engineering (TE) is a key solution to solve these problems of single path. The main purpose of TE is to optimize the network resource utilization and improve network performance by measuring and controlling network traffic. One of the TE approach for large flows is multipath routing which distribute traffic load among available multiple paths. To be intelligent multipath routing based on traffic types, we also need to detect large flow in network. In this paper, we present two main folds: (1) large flow detection approach by using sFlow analyzer in real time, and (2) measuring end-to-end delays of available paths between source node and destination node where large flow occurred in SDN environment.