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. 23, 2005
Filed:
Dec. 29, 2000
Carmel Chi Him Lau, Petaluma, CA (US);
Michael F. Davis, Penngrove, CA (US);
Thomas E. Black, Jr., Santa Rosa, CA (US);
Carmel Chi Him Lau, Petaluma, CA (US);
Michael F. Davis, Penngrove, CA (US);
Thomas E. Black, Jr., Santa Rosa, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Restricting the assignment of VLANs so that a unique VLAN or set of VLANs must be assigned to each link for a particular network circuit (NC) or group of NCs. NCs are prevented from being assignd a particular VLAN if the addition of the VLAN assignment will create a mix-match topology, which may either create a loop or prevent a loop from being able to be properly blocked without inadvertently blocking a link of another NC. Restriction of VLAN assignment allow a single conventional spanning tree to be run to ensure that there are no layerforwarding loops exist while at the same time not inadvertently blocking the path of another NC.