| 途中无重组的隧道MTU机制研究 |
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| 引用本文： | 肖融,孙波,肖永康,何珺,胡晓雁. 途中无重组的隧道MTU机制研究[J]. 计算机工程与应用, 2010, 46(17): 92-95. DOI: 10.3778/j.issn.1002-8331.2010.17.026 |
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| 作者姓名： | 肖融 孙波 肖永康 何珺 胡晓雁 |
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| 作者单位： | 1.北京师范大学 信息科学与技术学院，北京 100875 2.北京师范大学 教育技术学院，北京 100875 |
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| 摘 要： | 隧道已经在互联网中大量部署。隧道通信中两次端到端通信及途中封装及解封装的特点，会导致隧道出口出现重组现象。分析了隧道中重组的具体代价，表明重组极大地影响着隧道转发性能。对现有隧道MTU问题解决方案进行了研究，提出了在隧道入口实施的SFCT（SRC Fragment Completely for Tunnel）模型和FATE（Fragment in Advance on Tunnel Entry）模型来规避隧道中的重组，并给出了主要类型隧道中MTU问题的方案选择策略。模拟实验验证了其可用性及较好的性能。
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| 关 键 词： | 隧道 分片 重组 最大传输单元（MTU） |
| 收稿时间： | 2008-11-27 |
| 修稿时间： | 2009-2-26 |
Research of tunnel MTU mechanism without reassembling on way |
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| XIAO Rong,SUN Bo,XIAO Yong-kang,HE Jun,HU Xiao-yan. Research of tunnel MTU mechanism without reassembling on way[J]. Computer Engineering and Applications, 2010, 46(17): 92-95. DOI: 10.3778/j.issn.1002-8331.2010.17.026 |
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| Authors: | XIAO Rong SUN Bo XIAO Yong-kang HE Jun HU Xiao-yan |
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| Affiliation: | 1.College of Information Science and Technology，Beijing Normal University，Beijing 100875，China 2.College of Education Technology，Beijing Normal University，Beijing 100875，China |
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| Abstract: | Lots of tunnels have been deployed in Internet.There are two features in tunnel：Twice host-to-host communication,encapsulation and decapsulation on the way.The features would bring on reassembling in tunnel exit point,which would greatly impact the performance of tunnel packets forwarding.Current solutions for tunnel MTU are studied,and the cost of reassembling during tunnel forwarding is analysed.SFCT model and FATE model are proposed in tunnel entry point to evade reassembling.Moreover,the detailed data flow is presented,which integrates two models.Experiments show the solution can achieve better performance. |
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| Keywords: | tunnel fragment reassemble Maximum Transmission Uni（tMTU） |
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