基于ONOS的网络编程环境端口转发指令优化方法  

Optimization Method for Port Forwarding Instructions in Network Programming Environment Based on ONOS

作　　者：柳羽佳 王雨薇 朱晓东[1] 曾学文[1,2] LIU Yujia;WANG Yuwei;ZHU Xiaodong;ZENG Xuewen(National Network New Media Engineering Research Center,Institute of Acoustics,Chinese Academy of Sciences,Beijing,100190,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《网络新媒体技术》2024年第6期38-47,56,共11页Network New Media Technology

基　　金：基于SEANET网络的分布式超算(ARP号:E155180301)。

摘　　要：软件定义网络SDN开放了网络的可编程能力,SDN编程环境在控制面的基础上提供进一步的编程抽象,简化用户编程过程,屏蔽底层通信协议的复杂性。但现有编程环境在协议支持、编程抽象和指令处理效率方面仍有不足。本文在通用开源控制器平台ONOS上实现了一种以POF协议为南向协议的编程环境,在编译器中,将中间结构转换为POF消息时进行优化,采用预先加载指令同时将转发动作写入流元数据的方式,减少对交换机空间的无效占用,提高交换机资源的利用效率。实验表明,本文实现的编程环境可正确地将用户策略的逻辑转换为POF消息,有效地控制交换机的转发行为,显著节省指令所占用的交换机内存资源。SDN has opened up the programmable capabilities of networks.SDN programming environments provide further programming abstractions based on the control plane,simplifying the user’s programming process and shielding the complexity of underlying communication protocols.However,existing programming environments still have shortcomings in terms of protocol support,programming abstraction,and instruction processing efficiency.In this paper,we have implemented a programming environment with the POF protocol as the southbound protocol on the universal open-source controller platform ONOS.We have optimized the process by preloading instructions and writing forwarding actions into flow metadata when the compiler converts intermediate structures into POF messages.This reduces the unnecessary occupation of switch space and improves the utilization efficiency of switch resources.Experiments show that the programming environment implemented in this paper can correctly convert the logic of user policies into POF messages,effectively control the forwarding behavior of the switch,and significantly save the memory resources occupied by instructions on the switch.

关 键 词：软件定义网络 SDN 控制器 网络编程 协议无关转发 指令 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]