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. 20, 2009
Filed:
Jun. 16, 2005
Applicant:
Sunil P. Shah, San Jose, CA (US);
Inventor:
Sunil P. Shah, San Jose, CA (US);
Assignee:
Extreme Networks, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 12/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
Preventing a loop in a virtual network that spans at least two rings when there is a failure in two or more segments shared between the rings. A node connected to one of the shared segments is designated as the root blocker node and prevents transmitting data traffic between the node and all the ports connected thereto that have not failed except for one, in response to detecting the failure. For one embodiment the root blocker node periodically transmits a path detect signal to validate its blocking status.