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Link status monitoring based on packet loss detection

  • US 10,200,264 B2
  • Filed: 05/31/2016
  • Issued: 02/05/2019
  • Est. Priority Date: 05/31/2016
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a source node comprising a first plurality of communication interfaces, a first memory storing first routing information, and a first packet router; and

    a target node comprising a second plurality of communication interfaces, a second memory storing second routing information, and a second packet router,wherein the source node is configured to transmit a series of distinct forward link monitoring protocol messages destined for the target node over a first communication interface of the source node according to the stored first routing information, each distinct forward link monitoring protocol message having a metadata portion including a distinct forward sequence number;

    receive a series of return link monitoring protocol messages from the target node over a second communication interface of the source node, each return link monitoring protocol message responsive to a distinct forward link monitoring protocol message and having a metadata portion including a forward sequence number from the received forward link monitoring protocol message and a distinct return sequence number;

    determine if a communication problem occurred based on the forward and reverse sequence numbers in the series of received return link monitoring protocol messages; and

    when the source node determines that a communication problem occurred, determine whether the communication problem is associated with an outgoing communication link to the target node or an incoming communication link from the target node based on the forward and reverse sequence numbers in the series of received return link monitoring protocol messages; and

    wherein the target node is configured to receive a forward link monitoring protocol message including a distinct forward sequence number over a first communication interface of the target node, format a return link monitoring protocol message including the distinct forward sequence number and a distinct return sequence number, and transmit the return link monitoring protocol message destined for the source node over a second communication interface of the target node according to the stored second routing information.

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