Node device and method for controlling label switching path set up in inter-connected networks

  • US 6,341,127 B1
  • Filed: 07/13/1998
  • Issued: 01/22/2002
  • Est. Priority Date: 07/11/1997
  • Status: Expired due to Term
First Claim
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1. A router device, comprising:

  • a switch unit for carrying out a label switching with respect to entered packets according to a correspondence between an input side label for identifying a channel from which a packet stream is to be entered and an output side label for identifying a channel from which the packet stream is to be outputted;

    a memory unit for storing a policy information indicating a permitted starting point of a label switching path for which a packet transfer by the label switching is to be permitted;

    a receiving unit for receiving a request message for requesting a set up of a requested label switching path through the router device, the request message containing a starting point information indicating a starting point node/network of the requested label switching path and a stream information indicating a desired packet stream to be transferred through the requested label switching path; and

    a control unit for judging whether or not to permit the set up of the requested label switching path by comparing the starting point information contained in the request message as received by the receiving unit with the policy information as stored in the memory unit, and setting up the requested label switching path through the router device for the desired packet stream indicated by the stream information contained in the request message as received by the receiving unit when the set up of the requested label switching path is judged as permitted.

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