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:
Oct. 27, 2009
Filed:
Aug. 10, 2006
Laurence Rose, Oak Park, CA (US);
Laurence Rose, Oak Park, CA (US);
Alcatel Lucent, Paris, FR;
Abstract
A method for providing Topology Change functionality in a Local Area Network (LAN) comprises a plurality of operations. An operation is performed for determining that a Multiple Spanning Tree Instance (MSTI) Master port on a Bridge of a LAN has transitioned to Forwarding state from a corresponding Common Internal Spanning Tree Instance (CSTI) Root port state and an operation is performed for transitioning a Port Transmit state machine of the Bridge from an Idle state to a Transmit state for enabling issuance of a Topology Change (TC) BPDU message from the MSTI Master port. The operation of transitioning the Port Transmit state machine is performed in response to performing the operation of determining that the Multiple Spanning Tree Instance (MSTI) Master port has transitioned to Forwarding state.