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Method and device for checking health of link

  • US 9,912,560 B2
  • Filed: 12/10/2014
  • Issued: 03/06/2018
  • Est. Priority Date: 10/31/2014
  • Status: Active Grant
First Claim
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1. A method for checking health of a link, comprising:

  • receiving and saving control information generated by a keep-alive program, wherein the control information comprises a source Internet Protocol IP address, a source port, a destination IP address, a destination port, an IP address of a server to be checked, and mode information, wherein the mode information comprises a Direct Routing DR mode or a Tunnel TUN mode;

    performing a matching on a message received according to the control information, processing the message if the matching is successful, and sending a processed message to the server to be checked; and

    determining that the link is healthy if a response message is received from the server to be checked, and determining that the link is unhealthy if no response message is received from the server to be checked;

    wherein processing the message comprises;

    if the mode information is determined as the DR mode, amending a destination MAC address of the message to a MAC address of the server to be checked; and

    if the mode information is determined as the TUN mode, adding a TUNNEL head before the destination IP address of the message.

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