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Redundent virtual link aggregation group

  • US 10,476,698 B2
  • Filed: 03/18/2015
  • Issued: 11/12/2019
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. A switch, comprising:

  • link aggregation circuitry configured to establish a single virtual link aggregation group (VLAG) comprising a first set of links and a second set of links, whereina first end device is reachable via the VLAG through the first set of links from the switch and a second switch in one hop, anda second end device is reachable via the VLAG through the second set of links from the switch and the second switch in one hop; and

    link management circuitry configured to;

    determine a current mode of the VLAG by comparing a respective number of operational links in the first set of links and the second set of links with a protection threshold value, the current mode indicating which one of the first set of links and the second set of links is currently active in the VLAG; and

    operate, based on the current mode and a port role, the first set of links as active links carrying traffic for the VLAG and the second set of links as standby links for the first set of links, the port role being of a respective port participating in the VLAG and the port role indicating whether the respective port corresponds to an active link or a standby link,wherein comparing the respective number of operational links includes determining whether the number of operational links in one of the first set of links and the second set of links is lower than the protection threshold value and whether the number of operational links in another of the first and second set of links is greater than or equal to the protection threshold value.

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