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High availability networking with alternate pathing failover

  • US 6,763,479 B1
  • Filed: 06/02/2000
  • Issued: 07/13/2004
  • Est. Priority Date: 06/02/2000
  • Status: Expired due to Fees
First Claim
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1. A method for maintaining high availability in a two node computer network, wherein said computer network includes alternate pathing, said method comprising:

  • adding a first High Availability Networking (HAnet) mechanism to a first node of said two node computer network, wherein said HAnet mechanism operates within an Application layer of an architectural model of said computer network;

    monitoring a first network path of said computer network, wherein said first network path is between said first node and said second node, wherein said first network path corresponds to a primary path of said alternate pathing, and wherein said monitoring is by said first HAnet mechanism;

    detecting a failure of said first network path, wherein said failure is detected by said first HAnet mechanism; and

    performing a failover from said first network path to a second network path of said first node in response to detecting said failure, wherein said second network path corresponds to an alternate path of said alternate pathing, wherein said failover is performed by said first HAnet mechanism;

    wherein said first network path comprises a first network interface card in said first node coupled to a second network interface card in said second node, wherein said first network interface card and said second network interface card are coupled via a first crossover cable, and wherein said second network path comprises a third network interface card in said first node coupled to a fourth network interface card in said second node, wherein said third network interface card and said fourth network interface card are coupled via a second crossover cable;

    wherein said failover comprises;

    pausing monitoring of said first network interface card;

    disabling said first network interface card;

    plumbing said third network interface card;

    configuring said third network interface card with interface address parameters corresponding to said first network interface card; and

    enabling said third network interface card, wherein said enabling is subsequent to the expiration of a time delay, wherein said time delay corresponds to a delay parameter read from a configuration file; and

    resuming monitoring, wherein said second network path is monitored.

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