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Automatic SDLC role configuration on router interfaces

  • US 6,674,742 B1
  • Filed: 07/08/1999
  • Issued: 01/06/2004
  • Est. Priority Date: 07/08/1999
  • Status: Expired due to Fees
First Claim
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1. A method for automatically configuring a role of a router interface coupled to a synchronous data link control (SDLC) device over a communication link of a computer network, the method comprising the steps of:

  • waiting a predetermined period of time after activating the router to receive a frame from the SDLC device over the communication link;

    if no frame is received during the predetermined period, transmitting a null exchange identification (XID) frame from the router to the SDLC device forcing the device to respond with a configured XID identifying the device;

    examining the configured XID at the router; and

    automatically configuring the role of the router interface to primary if the configured XID is an XID0 frame.

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