Fragmentation considered harmful

  • Authors:
  • C. A. Kent;J. C. Mogul

  • Affiliations:
  • Digital Equipment Corporation;Digital Equipment Corporation

  • Venue:
  • SIGCOMM '87 Proceedings of the ACM workshop on Frontiers in computer communications technology
  • Year:
  • 1987

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Abstract

Internetworks can be built from many different kinds of networks, with varying limits on maximum packet size. Throughput is usually maximized when the largest possible packet is sent; unfortunately, some routes can carry only very small packets. The IP protocol allows a gateway to fragment a packet if it is too large to be transmitted. Fragmentation is at best a necessary evil; it can lead to poor performance or complete communication failure. There are a variety of ways to reduce the likelihood of fragmentation; some can be incorporated into existing IP implementations without changes in protocol specifications. Others require new protocols, or modifications to existing protocols.