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Spanning tree protocol enabled N-node link aggregation system

  • US 10,397,099 B2
  • Filed: 05/03/2017
  • Issued: 08/27/2019
  • Est. Priority Date: 05/03/2017
  • Status: Active Grant
First Claim
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1. A spanning tree enabled n-node link aggregation system, comprising:

  • a networking device;

    a plurality of link aggregation node devices, wherein a spanning tree protocol runs on each of the plurality of link aggregation node devices, and wherein the plurality of link aggregation node devices include;

    a first link aggregation node device that is coupled to the networking device by at least one first link that is part of a Link Aggregation Group (LAG), wherein the first link aggregation node device has been designated as a root bridge via the spanning tree protocol; and

    a second link aggregation node device that is coupled to the networking device by at least one second link that is part of the LAG;

    a plurality of Inter-Chassis Links (ICLs) coupled to the second link aggregation node device; and

    an enhanced spanning tree protocol engine running on the each of the plurality of link aggregation node devices, wherein the enhanced spanning tree protocol engine is configured to;

    determine that a first port that is part of one of the plurality of CLs has been designated as a first root port via the spanning tree protocol;

    determine that a second port that is part of one of the plurality of ICLs has been designated as an alternate port via the spanning tree protocol; and

    redesignate, in response to the first port being part of one of the plurality of ICLs and designated as the first root port and the second port being part of one of the plurality of ICLs and designated as the alternate port, the second port as a second root port, wherein the redesignating the second port as the second root port prevents blocking of the plurality of ICLs via the spanning tree protocol.

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