Patents by Inventor Rong-Lung Lue

Rong-Lung Lue has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for learning and switching frames in a distributed network switch
    Patent number: 6807172
    Abstract: A technique enables learning and switching of frames between line cards that are interconnected by a switch fabric of a distributed network switch. The network switch comprises a router and a plurality of forwarding engines, each having an associated forwarding table.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: October 19, 2004
    Assignee: Cisco Technology, Inc.
    Inventors: Herman Levenson, Jonathan Davar, Ajit Sanzgiri, Thomas J. Edsall, Chingwei Chang, Rong-Lung Lue, Saravanakumar Rajendran, Tuan Thanh Nguyen, Claudette Lucille Surma
  • Method and apparatus for updating and synchronizing forwarding tables in a distributed network switch
    Patent number: 6735198
    Abstract: A mechanism and technique updates and synchronizes forwarding tables contained on line cards that are interconnected by a switch fabric of a distributed network switch. The network switch is preferably a L3 or L4 switch comprising a plurality of forwarding engines distributed among the line cards. Each forwarding engine has an associated forwarding table, which preferably includes a L2 portion and L3/L4 portions. The L2 portion of the table is used to execute forwarding decision operations for frames forwarded among ports of the line cards, whereas the L3/L4 portions of the table are used to execute shortcut and forwarding operations for frames routed among the ports. The mechanism comprises a media access control (MAC) notification (MN) frame for updating and synchronizing the location of a destination port stored in the L2 portions of the forwarding tables.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 11, 2004
    Assignee: Cisco Technology, Inc.
    Inventors: Thomas J. Edsall, Herman Levenson, Claudette Lucille Surma, Ajit Sanzgiri, Saravanakumar Rajendran, Rong-Lung Lue, Tuan Thanh Nguyen