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:
Sep. 10, 2013
Filed:
Oct. 16, 2006
Sanjay Sane, Fremont, CA (US);
Lawrence Kreeger, Fremont, CA (US);
Thomas Edsall, Cupertino, CA (US);
Elango Ganesan, Palo Alto, CA (US);
Soei-shin Hang, Saratoga, CA (US);
Ramana Mellacheruvu, San Jose, CA (US);
Sanjay Sane, Fremont, CA (US);
Lawrence Kreeger, Fremont, CA (US);
Thomas Edsall, Cupertino, CA (US);
Elango Ganesan, Palo Alto, CA (US);
Soei-Shin Hang, Saratoga, CA (US);
Ramana Mellacheruvu, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A solution is provided wherein the interfaces between multiple chassis (e.g., edge switches) in a network of layer 2 devices and a spanning tree device are treated as a single emulated switch. This emulated switch effectively enables two different views to the two different sides. Thus, frames from the network of layer 2 switches destined to any port of the emulated switch may take any of the links (through any of the physical switches), thereby enabling effective load-balancing for frames traveling from the layer 2 network side into the spanning tree device. Meanwhile the spanning tree device does not recognize an illegal loop in its connection to two different edge switches as it views the two links as a single logical EtherChannel.