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Methods, systems and computer program products for non-disruptively transferring a virtual internet protocol address between communication protocol stacks

  • US 6,996,617 B1
  • Filed: 08/17/2000
  • Issued: 02/07/2006
  • Est. Priority Date: 08/17/2000
  • Status: Active Grant
First Claim
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1. A method of transferring a virtual Internet Protocol address (VIPA) between communication protocol stacks including at least a first communication protocol stack and a second communication protocol stack, comprising:

  • establishing ownership of the VIPA at the second communication protocol slack;

    maintaining connections using the VIPA to the first communication protocol stack subsequent to ownership of the VIPA being established at the second communication protocol stack;

    routing TCP/IP messages for the connections to the first communication protocol stack through the second communication protocol stack to the first communication protocol stack so as to non-disruptively move the VIPA from the first communication protocol stack to the second communication protocol stack; and

    establishing new connections to the second communication protocol stack using the VIPA such that connections using the VIPA concurrently exist to the first communication protocol stack and the second communication protocol stack.

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