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Single tag scheme for segment routing in software-defined network

Author

Listed:
  • Nattapong Kitsuwan

    (The University of Electro-Communications)

  • Eiji Oki

    (Kyoto University)

  • Takashi Kurimoto

    (National Institute of Informatics)

  • Shigeo Urushidani

    (National Institute of Informatics)

Abstract

This paper proposes a scheme to reduce a size of a packet header for a segment routing (SR) scheme in a software-defined network (SDN). The SR scheme inserts a segment identification (SID) list into the packet header to indicate a path for the source–destination pair of the packet. The path can be split into different segments to suit the service requirement and the segments are carried by the SID-list whose length increases with the number of segments. This also increases the packet overhead, and an additional packet is needed if the packet length exceeds the maximum transmission unit (MTU). Moreover, it may not be possible to implement SR in SDN due to the limited number of stacked labels provided by the switch vendor. In the proposed scheme, the SID-list is replaced by a single tag to indicate a node edge, called a swapping node. The tag is replaced by a new tag at the swapping node. With this scheme, the size of SID-list is fixed and does not vary with the number of segments, and no additional packets are required. A mathematic model to balance the number of flow entries in each swapping node is introduced by minimizing the maximum number of flow entries in each swapping node over the network. We implement the proposed scheme on the transmission-Japan science information network (SINET5) and demonstrate confirms its functionality.

Suggested Citation

  • Nattapong Kitsuwan & Eiji Oki & Takashi Kurimoto & Shigeo Urushidani, 2020. "Single tag scheme for segment routing in software-defined network," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 74(2), pages 173-184, June.
    • Handle: RePEc:spr:telsys:v:74:y:2020:i:2:d:10.1007_s11235-019-00645-w
    DOI: 10.1007/s11235-019-00645-w
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