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Network node and method of frame transfer

  • US 6,188,689 B1
  • Filed: 10/01/1997
  • Issued: 02/13/2001
  • Est. Priority Date: 10/04/1996
  • Status: Expired due to Fees
First Claim
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1. A node, comprising:

  • first means for transferring a connection-less type frame received from one logical network to another logical network by assembling a packet from the received frame and by referring to a destination network-layer address in the packet;

    a memory for storing a correspondence relationship between an input dedicated virtual link identifier allocated dedicatedly to a specified flow and information for designating a next-hop node to which a frame of the specified flow is to be transferred;

    second means for transferring a connection-less type frame received from one logical network to another logical network by referring to the correspondence relationship stored in the memory based on the input dedicated virtual link identifier written in the received frame using a Media Access Control (MAC) address field and by writing the information for designating the next-hop node in the frame to be transferred;

    means for receiving a frame when the input dedicated virtual link identifier stored in the memory is written in the frame using a destination MAC address field, and wherein the second means includes means for referring to the correspondence relationship stored in the memory based on the input dedicated virtual link identifier written in the received frame using a destination MAC address field and writing the information designating the next-hop node in the frame to be transferred using the destination MAC address field;

    means for creating a frame and writing the inout dedicated virtual link identifier in the created frame using a source MAC address field; and

    means for transmitting the created frame with the input dedicated virtual link identifier to said one logical network so that a datalink switch in said one logical network obtains information for routing a frame based on a destination MAC address in the frame the destination MAC address corresponding to the input dedicated virtual link identifier.

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