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:
Oct. 05, 2010
Filed:
Jun. 03, 2008
John R. Reilly, Roseville, CA (US);
John R. Reilly, Roseville, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Embodiments of the invention disclose a method of determining the existence of state synchronization between two redundant processing modules operating in a network switch that operates in a manner wherein ordinary network traffic stimuli are autonomously processed through interface and fabric modules, and extraordinary network stimuli are processed from the interface modules to the redundant processing modules, wherein one of the modules is operating actively in the switch and the other is operating in a standby condition whereby state latency exists between the two modules, comprising stopping processing of the extraordinary stimuli to the actively operating processing module, completing processing of stimuli previously received by the actively operating processing module, completing processing of stimuli previously received by the processing module operating in a standby condition, reading the state information of each of the two processing modules, and comparing the state information of said two processing modules to determine if their state information is synchronized, and resuming processing extraordinary stimuli by the actively operating processing module.