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RFC 71 - Reallocation in Case of Input Error

  • Status: Unknown
  • Published: 25 September 1970
  • Stream: Legacy
  • Errata: No Errata

Document Information​

  • RFC Number: 71
  • Title: Reallocation in Case of Input Error
  • Authors: Tjaart Schipper (UCLA-CCN)
  • Date: 25 September 1970
  • Category: Unknown

Abstract​

RFC 71 describes the protocol used at the CCN-Host at UCLA to resynchronize flow control when an input error makes it impossible for the receiving NCP to determine the length of a message read from the IMP. When an input error is detected and the NCP can find the intended link number, it sends a GVB with frac = 0 to the sending Host and disregards further incoming messages on that link, and a new ALL is sent once the RET has been received. If the sending Host is not waiting for a RFNM when the GVB arrives, it sends the RET immediately; if it is waiting for a RFNM corresponding to the message in error, or to a following message, it sends the RET after that RFNM has been received. In this way the receiving Host knows that the link is clear before it issues a new ALL.

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