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Fiber channel CRC for internal error checking on a switching platform

  • US 6,647,528 B1
  • Filed: 11/02/2000
  • Issued: 11/11/2003
  • Est. Priority Date: 11/02/2000
  • Status: Expired due to Fees
First Claim
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1. A fibre channel interface to a fibre channel communications line comprising:

  • a) an external interface connected to the communications line so as to receive and transmit fibre channel frames having headers and data payloads over the communications line;

    b) a fibre channel controller receiving frames from the external interface; and

    c) a CRC module connected so as to monitor data flowing between the external interface and the fibre channel controller;

    the CRC module having i) a first CRC generator that generates a CRC value based on a starting value and data to be analyzed ii) a first frame header processor with circuitry to analyze headers and transmit data payloads to the CRC generator as data to be analyzed; and

    iii) a first memory in communication with the first CRC generator that stores intermediate CRC values for a sequence for later use by the first CRC generator as the starting value when analyzing a next frame in the sequence.

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