Patents by Inventor Arun Girdharilal Khanna

Arun Girdharilal Khanna 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).

  • Arrangement for controlling network proxy device traffic on a transparently-bridged local area network using token management
    Patent number: 6442610
    Abstract: A transparently-bridged wide area network connecting Ethernet/IEEE 802.3-based local area networks uses redundant proxy devices one each LAN for internetwork communications. The proxy devices on a given LAN, implemented as data link switching (DLSw) devices, mediate for proxy services by generation and maintenance of a token between the proxy devices capable of providing the corresponding proxy services. In the case of transfer of a data frame, a proxy device having received a frame from an end station determines whether any other proxy device possess a token authorizing the establishment of a circuit connection via a wide area network for transfer of the frame to another local area network. If the proxy devices determines that another proxy device possess the token, the proxy device lacking the token drops the frame. If the proxy device possesses the token, then the frame can be transferred via the wide area network.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: August 27, 2002
    Assignee: Cisco Technology, Inc.
    Inventors: Arun Girdharilal Khanna, Arunkumar Bhushappagala Thippeswamy, Frank Gerard Bordonaro, Scott Allan Bales, Uwe Sellentin
  • Arrangement for preventing looping of explorer frames in a transparent bridging domain having multiple entry points
    Patent number: 6343330
    Abstract: A transparently-bridged wide area network connecting Ethernet/IEEE 802.3-based local area networks uses redundant proxy devices on each LAN for internetwork communications. The proxy devices, implemented as data link switching (DLSw) devices, prevent looping of traffic such as explorer frames by sharing their MAC addresses to enable the proxy devices to recognize data packets from another proxy device. Incoming explorer frames from the wide area network are modified by performing an address substitution, where the source address in a received explorer frame is replaced with the address of the local proxy device. The proxy device then outputs the modified explorer frame onto the local area network. Any other proxy device on that same local network will then be able to detect the modified explorer frame as a frame forwarded by another proxy device, as opposed to a data frame from an end station on that local area network.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: January 29, 2002
    Assignee: Cisco Technology, Inc.
    Inventors: Arun Girdharilal Khanna, Arunkumar Bhushappagala Thippeswamy, Frank Gerard Bordonaro, Patricia Ann Webster, Scott Allen Bales, Uwe Sellentin