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Impending control plane disruption indication using forwarding plane liveliness detection protocols

  • US 9,769,017 B1
  • Filed: 09/26/2014
  • Issued: 09/19/2017
  • Est. Priority Date: 09/26/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • using, by a control plane of a network device, one or more routing protocols to exchange network topology information with one or more other network devices, the one or more other network devices including a peer network device;

    programming, by the control plane of the network device, a packet forwarding component of the network device to forward packets in accordance with the network topology information;

    detecting, by the packet forwarding component, that a disruption to operation of the control plane of the network device is impending, wherein the disruption to operation of the control plane compromises control plane communication between the control plane of the network device and the peer network device;

    constructing, by the packet forwarding component of the network device, a liveliness detection message in accordance with a forwarding-plane liveliness detection protocol, wherein the liveliness detection message comprises an indication that the disruption to operation of the control plane is impending; and

    outputting, by the packet forwarding component, the liveliness detection message to the peer network device in accordance with the forwarding plane liveliness detection protocol.

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