Patents by Inventor Michelle M. Ragonese

Michelle M. Ragonese 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).

  • Ethernet automatic protection switching
    Patent number: 7003705
    Abstract: A method and apparatus is provided for automatic protection switching in a ring network by creating a protection domain having a control vlan and protected data vlans and designating a master node and transit nodes connected by a primary port and a secondary port. The master node blocks the secondary port for data vlan traffic until it detects a fault either by notice from a transit node or by polling. When a fault is detected, the master node unblocks the secondary port for data vlan traffic. When the fault is restored, the transit node temporarily blocks the restored port to data vlan traffic thereby preventing a loop. Each time the secondary port is blocked and unblocked, the forwarding databases on all the nodes are flushed.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: February 21, 2006
    Assignee: Extreme Networks, Inc.
    Inventors: Michael Yip, Sunil P. Shah, Michelle M. Ragonese
  • Ethernet automatic protection switching
    Patent number: 6766482
    Abstract: A method and apparatus is provided for automatic protection switching in a ring network by creating a protection domain having a control vlan and protected data vlans and designating a master node and transit nodes connected by a primary port and a secondary port. The master node blocks the secondary port for data vlan traffic until it detects a fault either by notice from a transit node or by polling. When a fault is detected, the master node unblocks the secondary port for data vlan traffic. When the fault is restored, the transit node temporarily blocks the restored port to data vlan traffic thereby preventing a loop. Each time the secondary port is blocked and unblocked, the forwarding databases on all the nodes are flushed.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: July 20, 2004
    Assignee: Extreme Networks
    Inventors: Michael Yip, Sunil P. Shah, Michelle M. Ragonese