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:
Feb. 15, 2011
Filed:
Mar. 27, 2006
Jessy Rouyer, Fort Worth, TX (US);
Laurence Rose, Oak Park, CA (US);
Nalinakshan Kunnath, Calabasas, CA (US);
Jessy Rouyer, Fort Worth, TX (US);
Laurence Rose, Oak Park, CA (US);
Nalinakshan Kunnath, Calabasas, CA (US);
Alcatel Lucent, Paris, FR;
Abstract
A bridge (e.g., IEEE 802.1 bridge) and a method are described herein which ensure the proper propagation of a 'cut' within a bridged network (e.g., Ethernet-based bridged network). In one embodiment, the bridge has a port role transitions (PRT) state machine which uses a first condition represented as (proposed && !agree) to transit to an X_PROPOSED state and a second condition represented as (! proposed && allSynced && !agree) ∥ (proposed && agree) to transit to an X_AGREED state (where X represents 'ROOT', “ALTERNATE” and “MASTER”). The first condition and the second condition are both defined such that the X_PROPOSED state is always entered before the X_AGREED state which ensures the proper propagation of a “cut” within the bridged network.