Application-transparent IP redundancy
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 29, 2008
Grant Date -
May 13, 2004
app pub date -
Nov 13, 2002
filing date -
Nov 13, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is directed to a method, a service node and a system for providing IP redundancy between a first service node and a second service node being mutually redundant. The first and the second service nodes are connected via a virtual connection. The first service node has a physical network interface to an IP node and a virtual network interface to the virtual connection. The first service node comprises a routing table having a cost associated with the virtual network interface. The method comprises steps of detecting by the first service node that the second service node is unavailable, updating in the routing table the cost from a higher value to a lower value and informing the IP node connected to the physical network interface of the update of the cost so as to process at the first service node traffic addressed to the second service node.
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