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:
Apr. 07, 2015
Filed:
Jan. 04, 2013
International Business Machines Corporation, Armonk, NY (US);
Tamanna Z. Sait, San Jose, CA (US);
Venkatesan Selvaraj, Sunnyvale, CA (US);
Shoou Yiu, San Jose, CA (US);
Yu H. Guo, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Physical links between an access switch and a pair aggregation switches are aggregated into a virtual link aggregation group (vLAG). Each aggregation switch is a local switch to itself and a remote switch to the other aggregation switch. Each aggregation switch maintains a state machine including initialization, local-up, remote-up, and formed states. In the initialization state, the physical link between the access switch and each aggregation switch is down, and the vLAG is down. In the local-up state, just the physical link between the access switch and the local switch is up, and the vLAG is down. In the remote-up state, just the physical link between the access switch and the remote switch is up, and the vLAG is down. In the formed state, the physical link between the access switch and each aggregation switch is up, and the vLAG is up.