A stochastic model for transit latency in OpenFlow SDNs

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• 作者：Uzzam Javed^a ; ^{13mseeujaved@seecs.edu.pk}Author Vitae ; Azeem Iqbal^a ; ^{13mseeaiqbal@seecs.edu.pk}Author Vitae ; Saad Saleh^a ; ^{saad.saleh@seecs.edu.pk}Author Vitae ; Syed Ali Haider^a ; ^b ; ^{ali.haider@seecs.edu.pk}Author Vitae ; Muhammad U. Ilyas ; ^a ; ^c ; ^{usman@ieee.org} ; ^{usman.ilyas@seecs.edu.pk}Author Vitae
• 关键词：Software defined networks ; OpenFlow ; Open vSwitch ; Latency ; Modeling
• 刊名：Computer Networks
• 出版年：2017
• 出版时间：11 February 2017
• 年：2017
• 卷：113
• 期：Complete
• 页码：218-229
• 全文大小：6872 K
• 卷排序：113

文摘

Software defined networks (SDNs) introduced the concept of decoupling control and data planes which is a paradigm shift. The OpenFlow protocol is one of a number of technologies that enables this decoupling and, in effect, commodifies network equipment. As of now, there is still limited work that has been done towards modeling the transit delay across OpenFlow switches experienced by network traffic. In this work we develop a stochastic model for the path latency in Open vSwitch (used together with a POX controller) based on measurements made in experiments performed on three different platforms which include 1) Mininet, 2) MikroTik RouterBoard 750GL and 3) GENI testbed softswitch. We propose a log-normal mix model (LNMM) and show that it offers a R2 value of greater than 0.90 for most of our experiments. We also demonstrate how the M/M/1 models proposed in earlier studies is a poor fit.