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:
Aug. 27, 2013
Filed:
May. 04, 2010
Vishal Zinjuvadia, San Jose, CA (US);
Vikas Khetan, Sunnyvale, CA (US);
Girish Sarveiya, Pleasanton, CA (US);
Vishal Zinjuvadia, San Jose, CA (US);
Vikas Khetan, Sunnyvale, CA (US);
Girish Sarveiya, Pleasanton, CA (US);
Force10 Networks, Inc., San Jose, CA (US);
Abstract
A plurality of network devices such as routers are included in an instance of a spanning tree. The network device creates a ring context on a port that it identifies as both a blocking port and configured to run a spanning tree protocol. The ring context can be comprised of a region name, an STP domain name or a spanning tree instance. The network device transmits a ring discover message for the ring context over a forwarding port and determines that a ring exists when it receives the message at a blocking port. The network device subsequently transmits a reverse ring discover message from its blocking port which includes the status of the discovered ring to the members of the ring topology.