Department of Computer Science and Technology

Technical reports

The Cambridge Fast Ring networking system (CFR)

Andy Hopper, Roger M. Needham

June 1986, 25 pages

DOI: 10.48456/tr-90


Local area networks have developed from slow systems operating at below 1MBs to fast systems at 50MBs or more. We discuss the choices facing a designer as faster speeds for networks are contemplated. The 100MBs Cambridge Fast Ring is described. The ring protocol allows one of a number of fixed size slots to be used once or repeatedly. The network design allows sets of rings to be constructed by pushing the bridge function to the lowest hardware level. Low cost and ease of use is normally achieved by design of special chips and we describe a two-chip VLSI implementation. This VLSI hardware forms the basis of a kit-of-parts from which many different network components can be constructed.

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BibTeX record

  author =	 {Hopper, Andy and Needham, Roger M.},
  title = 	 {{The Cambridge Fast Ring networking system (CFR)}},
  year = 	 1986,
  month = 	 jun,
  url = 	 {},
  institution =  {University of Cambridge, Computer Laboratory},
  doi = 	 {10.48456/tr-90},
  number = 	 {UCAM-CL-TR-90}