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Data plane restart without state change in a control plane of an intermediate network node

  • US 6,785,843 B1
  • Filed: 02/23/2001
  • Issued: 08/31/2004
  • Est. Priority Date: 02/23/2001
  • Status: Active Grant
First Claim
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1. A method for restarting a data plane of an intermediate node of a computer network without affecting state information stored on a control plane of the node, the method comprising the steps of:

  • executing an operating system on a supervisor processor, the operating system having a platform independent code region and a platform specific code region, the platform independent code region having code features to build forwarding information base (FIB) tables for designated protocols;

    coupling client software to each code feature, the client software also coupling to the platform specific code region of the operating system;

    maintaining a current state of the control plane with the supervisor processor of the control plane;

    detecting a fatal error in the data plane at the supervisor processor, the data plane including hardware components;

    notifying the client software about the fatal error;

    restarting only the data plane while continuing operation of the control plane; and

    loading software into the hardware components of the data plane by the client software.

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