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Browse Prior Art Database

Improvement to Handling of Intermittent Network Error Conditions

IP.com Disclosure Number: IPCOM000116942D
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Meyer, AJ: AUTHOR

Abstract

A method of ignoring non-critical protocol violations (violations that do not involve loss in data integrity) is disclosed. Examples of these types of violations are discussed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 75% of the total text.

Improvement to Handling of Intermittent Network Error Conditions

      A method of ignoring non-critical protocol violations
(violations that do not involve loss in data integrity) is disclosed.
Examples of these types of violations are discussed.

      By utilizing information on the line (such as timeout errors,
who is currently transmitting, etc.) and checking this against
current protocol rules, the real effects of certain errors can be
determined, and possibly ignored, depending on the condition in which
they occurred.  Two examples are discussed below:
  o  In a half duplex environment, with one station transmitting data
      to a second station, if the first station happens to send an
XOFF
      within the data stream, this request can usually be ignored by
      the second station since XOFFs are sent when buffers fill up,
      which is not the case in this instance.
  o  Given two stations transmitting over a network using a protocol
      with a required response needed after each poll (i.e.,
      Synchronous Data Link Control (SDLC) half-duplex ).  If the
      network buffers responses from the secondary, and causes
timeout
      to occur since the response never returns to the primary
station,
      the primary will then re-poll.  The response to this re-poll
      might "kick loose" the preceding response that was buffered in
      the network, and the primary station then sees two respo...