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System for detecting errors in a network

  • US 6,208,616 B1
  • Filed: 10/01/1997
  • Issued: 03/27/2001
  • Est. Priority Date: 05/13/1997
  • Status: Expired due to Term
First Claim
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1. A computer system comprising:

  • a protocol stack;

    a plurality of network interface cards (NICs) and a second in communication with the protocol stack; and

    a program module in communication with said protocol stack, wherein said program module includes instructions for routing data packets from said protocol stack, wherein said routing comprises, designating one of the plurality of NICs as a primary NIC and designating the remainder of the NICs as secondary NICs;

    sending a probe packet to each of the NICs;

    attempting to receive a return packet in response to the probe packet from each of the NICs;

    if a return packet is not received from an NIC in the group, designating the NIC a failed NIC;

    redirecting packets that were originally addressed to the failed NIC to at least one other NIC through the protocol stack;

    if the failed NIC is the primary NIC, designating another NIC as a new primary NIC;

    sending a probe packet to the failed NIC;

    attempting to receive a return packet from the failed NIC; and

    if the failed NIC is the primary NIC and a return packet is received from the failed primary NIC, designating the failed NIC as a secondary NIC.

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