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:
Dec. 29, 2009
Filed:
Feb. 08, 2006
Manoj T. Narayanan, San Jose, CA (US);
Hemant K. Hebbar, Santa Clara, CA (US);
Vinayakumar V. Parameswarannair, San Jose, CA (US);
Eden Tan, Campbell, CA (US);
Michael R. Smith, San Jose, CA (US);
Norman W. Finn, Livermore, CA (US);
Manoj T. Narayanan, San Jose, CA (US);
Hemant K. Hebbar, Santa Clara, CA (US);
Vinayakumar V. Parameswarannair, San Jose, CA (US);
Eden Tan, Campbell, CA (US);
Michael R. Smith, San Jose, CA (US);
Norman W. Finn, Livermore, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A system and method detects and responds to failures occurring in a virtual switch. The virtual switch is formed from two or more physical switches interconnected by a Virtual Switch Link (VSL). One physical switch is elected the Master, and it executes a link aggregation protocol for the virtual switch. If the VSL fails, one of the other physical switches assumes that it should become the Master for the virtual switch, and it begins executing the link aggregation protocol. By adding information unique to the physical switches in the control packets of the link aggregation protocol, remote switches can identify when the VSL fails, and report this condition to the original Master. In response, the original Master or the new Master takes corrective action.