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Switched token ring over ISL (TR-ISL) network

  • US 6,704,318 B1
  • Filed: 03/10/1999
  • Issued: 03/09/2004
  • Est. Priority Date: 11/30/1998
  • Status: Expired due to Term
First Claim
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1. A method for efficiently transporting token ring (TR) frames through a token ring computer network, comprising:

  • interconnecting a first switch and a second switch with an interswitch link (ISL) link;

    receiving an incoming TR frame at an inbound port of the first switch, the inbound port associated with a source Concentrator Relay Function (CRF);

    parsing the incoming TR frame at the inbound port to obtain forwarding information;

    rendering a forwarding decision for the incoming TR frame using the forwarding information from the incoming TR frame; and

    encapsulating the incoming TR frame with the forwarding information when the rendered forwarding decision indicates transporting of the TR frame from the first switch to the second switch over the ISL link, a logical token ring extending from the CRF through the ISL link.

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