The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2009
Filed:
May. 24, 2002
Donald Banks, San Jose, CA (US);
Vijay Savla, Acton, MA (US);
Timothy Donahue, Natick, MA (US);
Balachander Chandrasekaran, Milpitas, CA (US);
Denis Leclerc, Sterling, MA (US);
Donald Banks, San Jose, CA (US);
Vijay Savla, Acton, MA (US);
Timothy Donahue, Natick, MA (US);
Balachander Chandrasekaran, Milpitas, CA (US);
Denis Leclerc, Sterling, MA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A system and method for supporting a 'hitless' switchover from an Active to a Standby processor uses a hybrid synchronization of interface states to allow applications that have been modified to have HA aware features and non-modified applications to function on the system. An interface description data block on the Standby RP is synchronized to the interface description data block on the Active RP and is maintained in a shadow state when the Active RP controls the system. In the event of a switchover between the RPs the interface description data block on the Standby RP is copied from the shadow state to a real state and applications on the Standby RP are notified of a status change.