? 在软件定义数据中心网络中基于LLDP的延迟测量方法
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Journal of Computer Science and Technology 2018, Vol. 33 Issue (2) :277-285    DOI: 10.1007/s11390-018-1819-2
Special Section on Computer Networks and Distributed Computing << Previous Articles | Next Articles >>
在软件定义数据中心网络中基于LLDP的延迟测量方法
Yang Li1, Student Member, CCF, Zhi-Ping Cai1*, Senior Member, CCF, Member, IEEE, Hong Xu2, Member, ACM, IEEE
1 College of Computer, National University of Defense Technology, Changsha 410073, China;
2 Department of Computer Science, City University of Hong Kong, Hong Kong 999077, China
LLMP: Exploiting LLDP for Latency Measurement in Software-Defined Data Center Networks
Yang Li1, Student Member, CCF, Zhi-Ping Cai1*, Senior Member, CCF, Member, IEEE, Hong Xu2, Member, ACM, IEEE
1 College of Computer, National University of Defense Technology, Changsha 410073, China;
2 Department of Computer Science, City University of Hong Kong, Hong Kong 999077, China

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摘要 为了及时检测网络异常,确保网络有效运行,数据中心网络的管理员不得不持续地监控路径延迟。我们在本文中提出了链路层测量协议(LLMP),这是一种基于链路层发现协议(LLDP)的延迟测量框架。LLDP是软件定义网络(SDN)中控制器用于动态发现网络拓扑的协议。我们将时间戳插入到LLDP的可选字段LLDPTLV中,从而使得控制器可以评测任何单个链路段的延迟。该框架利用反应式性测量方法,无需向网络注入任何额外的探测分组。实验结果表明,通过LLMP可以准确测量链路延迟。即使在相对复杂的网络条件下,LLMP仍然可以获得很高的测量精度。将LLMP测量结果存储到一个延迟矩阵中,还可用于推断多链路的路径延迟。
关键词软件定义网络   链路层发现协议   延迟测量     
Abstract: The administrators of data center networks have to continually monitor path latency to detect network anomaly quickly and ensure the efficient operation of the networks. In this work, we propose Link Layer Measurement Protocol (LLMP), a prototype latency measuring framework based on the Link Layer Discovery Protocol (LLDP). LLDP is utilized by the controller to discover network topology dynamically. We insert timestamps into the optional LLDPTLV field in LLDP, so that the controller can estimate latency on any single link. The framework utilizes a reactive measurement approach without injecting any probe packets to the network. Our experiments show that the latency of a link can be measured accurately by LLMP. In relatively complex network conditions, LLMP can still maintain a high accuracy. We store the LLMP measurement results into a latency matrix, which can be used to infer the path latency.
Keywordssoftware-defined network (SDN)   Link Layer Discovery Protocol (LLDP)   latency measurement     
Received 2017-07-31;
本文基金:

This work was supported by the National Natural Science Foundation of China under Grant Nos. 61379145, 61501482, 61762033.

通讯作者: Zhi-Ping Cai     Email: zpcai@nudt.edu.cn
About author: Yang Li received his B.S. degree in computer science from Ocean University of China, Qingdao, in 2014. Then he received his M.S. degree in computer science and technology from National University of Defense Technology, Changsha, in 2017. His research interests are mainly in software-defined network (SDN) and network measurement
引用本文:   
Yang Li, Zhi-Ping Cai, Hong Xu.在软件定义数据中心网络中基于LLDP的延迟测量方法[J]  Journal of Computer Science and Technology , 2018,V33(2): 277-285
Yang Li, Zhi-Ping Cai, Hong Xu.LLMP: Exploiting LLDP for Latency Measurement in Software-Defined Data Center Networks[J]  Journal of Computer Science and Technology, 2018,V33(2): 277-285
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