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. 06, 2011
Filed:
Jun. 02, 2009
Andrew Tai-chin Kuo, Newark, CA (US);
Ivy Pei-shan Hsu, Pleasanton, CA (US);
Jordi Moncada-elias, Milpitas, CA (US);
Rajkumar Jalan, Saratoga, CA (US);
Gurudeep Kamat, Mountain View, CA (US);
Andrew Tai-Chin Kuo, Newark, CA (US);
Ivy Pei-Shan Hsu, Pleasanton, CA (US);
Jordi Moncada-Elias, Milpitas, CA (US);
Rajkumar Jalan, Saratoga, CA (US);
Gurudeep Kamat, Mountain View, CA (US);
Brocade Communications Systems, Inc., San Jose, CA (US);
Abstract
Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.