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:
Nov. 18, 2008
Filed:
May. 01, 2006
Hien Nguyen, Fremont, CA (US);
Rodney Fong, Pleasanton, CA (US);
Ravikanth Samprathi, Santa Clara, CA (US);
Stanley Tang, Millbrae, CA (US);
Hien Nguyen, Fremont, CA (US);
Rodney Fong, Pleasanton, CA (US);
Ravikanth Samprathi, Santa Clara, CA (US);
Stanley Tang, Millbrae, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Potential forwarding loops in bridged networks are detected. A switch monitors the movement of packet addresses in the forwarding table to different ports. If the port associated with an address changes multiple times in a short time duration, then a potential forwarding loop is detected, and a loop corrector is notified to take appropriate action to correct the problem, such as, but not limited to changing the state of a port to a blocking state or disabling an interface, etc. If there are multiple movements outside the short time duration, they may be correct movements adjusting to the actual reconfiguration of a network, and thus, these movements are effectively filtered out of consideration.