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VLAN DATA FRAMING AND TRANSMISSION

  • US 20110058559A1
  • Filed: 08/07/2008
  • Published: 03/10/2011
  • Est. Priority Date: 08/08/2007
  • Status: Abandoned Application
First Claim
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1. A method of framing data for transmission to or from one of a number of users connected to a VLAN data network, comprising:

  • sending data from a first user to a first layer 2 switch;

    dividing the data in the first layer 2 switch into frames including a header and a payload, the header comprising a portion of one of two selectable values assigned according to whether the data is to be transmitted from or to a user, wherein the header comprises a VLAN tag including a Tag Protocol ID (TPID) portion and a Tag Control Information (TCI) portion, a first TPID value being assigned in the first layer 2 switch to be indicative of data being transmitted from the user;

    forwarding the framed data from the first layer 2 switch to a distribution router comprising the VLAN;

    reframing the data in the distribution router so as to assign a second, different, TPID value which is indicative of data being transmitted to a second user;

    forwarding the re-framed data from the distribution router to a second layer 2 switch to which the second user is connected; and

    transmitting the data from the second layer 2 switch to the second user.

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