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:
Jan. 27, 2009
Filed:
Dec. 22, 2003
Rana Dayal, Cary, NC (US);
Donald B. Grosser, Apex, NC (US);
Michael D. Mroz, Fuquay Varina, NC (US);
Daniel L. Schweitzer, Durham, NC (US);
Rana Dayal, Cary, NC (US);
Donald B. Grosser, Apex, NC (US);
Michael D. Mroz, Fuquay Varina, NC (US);
Daniel L. Schweitzer, Durham, NC (US);
Extreme Networks, Inc., Santa Clara, CA (US);
Abstract
Methods and systems for hitless switch management module failover and upgrade are disclosed. According to one method, a master switch management module participates in network protocols and performs packet forwarding operations. The master switch management module distributes protocol state and packet forwarding information to the slave switch management module. The slave switch management module continuously monitors the operational state of the master switch management module. In response to detecting failure of the master switch management module or a forced failover initiated by the user interface on the master switch management module, the slave switch management module begins network protocol operation in the master mode in a state where the master switch management module last operated correctly.