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Transferring messages in networks made up of subnetworks with different namespaces

  • US 5,940,394 A
  • Filed: 08/08/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 08/08/1996
  • Status: Expired due to Term
First Claim
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1. A method employed in a packet network to transfer a packet via a path that involves subnetworks having different namespaces, the method comprising the steps of:

  • when the packet enters a first subnetwork and a current header of the packet specifies a destination in a subnetwork other than said first subnetwork, adding a new header to the packet and treating the new header as the current header, the new header specifying an exit destination where packets transferred via the path enter a second subnetwork;

    sending the packet to the destination specified in the current header; and

    if the packet arrives at the exit destination, removing the current header and providing the packet to said second subnetwork;

    wherein the path is such that the namespace of the first subnetwork is nested in the namespace of the second subnetwork, andthe method further comprises dynamically assigning a temporary address in the second subnetwork to the path, the source address being the temporary address, and providing the assigned temporary address via the path.

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