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Mechanism for terminating relay operations in a distributed switch with cascaded configuration

  • US 9,641,455 B2
  • Filed: 07/18/2013
  • Issued: 05/02/2017
  • Est. Priority Date: 07/18/2013
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • maintaining a plurality of switches in a cascaded configuration, wherein the plurality of switches comprise an originating switch, an intermediate switch, and a destination switch;

    sending, by the originating switch a switch fabric internal link services (SW-ILS) that has resources denoted by a first exchange to the intermediate switch;

    forwarding, by the intermediate switch the SW-ILS request to the destination switch, where the SW-ILS request that is forwarded has resources denoted by a second exchange;

    subsequent to the forwarding, detecting an error by the originating switch;

    in response to the detecting of the error by the originating switch, sending an abort sequence (ABTS) with which the first exchange is associated, by the originating switch to the intermediate switch;

    receiving at the intermediate switch the ABTS sent by the originating switch; and

    in response to receiving at the intermediate switch the ABTS sent by the originating switch, performing by the intermediate switch;

    sending an acknowledgement associated with the first exchange to the originating switch to deallocate the resources denoted by the first exchange;

    sending an ABTS with which the second exchange is associated to the destination switch;

    in response to sending the ABTS with which the second exchange is associated to the destination switch, receiving an acknowledgement associated with the second exchange from the destination switch; and

    in response to receiving the acknowledgement associated with the second exchange from the destination switch, deallocating the resources denoted by the second exchange.

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