Real-Time Dynamic Decomposition Storage of Routing Tables

  • Wenlong Chen
  • Lijing Lan
  • Xiaolan TangEmail author
  • Shuo Zhang
  • Guangwu Hu
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 201)


The decomposition storage of routing tables can effectively alleviate the storage problem caused by the Internet routing expansion. However, the existing researches based on certain routing tables cannot apply to unknown ones or support dynamic changes of routing tables. This paper presents a real-time dynamic decomposition storage model, named RDDS, which takes the IP prefix with 8 bits length mask as a pocket prefix and distributes the routing entries (REs) to different line cards (LCs) according to different pocket prefixes. In the light of the mapping relationship between the destination IP addresses of packets and the pocket prefixes, the forwarding engine determines the host LC of one IP packet and complete forwarding in the LC. RDDS needs a mapping table to locate the host LC in the process of packets forwarding, which only introduces very little logical processing. Therefore, RDDS hardly affect the overall performance of packets forwarding in routers. Experimental results show that RDDS achieves real-time part-storage and the load balancing of REs in LCs. Considering the frequent update of routing tables, RDDS is more significant than other storage models in real environments.


Routing tables Real-time Dynamic Decomposition storage Pocket prefix Mapping table 



This work is supported by the National Natural Science Foundation of China under Grant No. 61373161, 61502320, 61300171. Science & Technology Project of Beijing Municipal Commission of Education under Grant No. KM201410028015, the Youth Backbone of Beijing Outstanding Talent Training Project under Grant No. 2014000020124G133, and Guangdong Natural Science Foundation No. 2015A030310492.


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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2017

Authors and Affiliations

  • Wenlong Chen
    • 1
  • Lijing Lan
    • 1
  • Xiaolan Tang
    • 1
    Email author
  • Shuo Zhang
    • 1
  • Guangwu Hu
    • 2
  1. 1.College of Information EngineeringCapital Normal UniversityBeijingChina
  2. 2.Graduate School at ShenzhenTsinghua UniversityShenzhenChina

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