Patents by Inventor Patricia Ann Webster

Patricia Ann Webster 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 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