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:
May. 17, 2011
Filed:
Jan. 05, 2009
Peter Tabery, Munich, DE;
Ralf Klotsche, Neuenbuerg, DE;
Peter Tabery, Munich, DE;
Ralf Klotsche, Neuenbuerg, DE;
Alcatel-Lucent, Paris, FR;
Abstract
A method for protecting a network configuration set up by a spanning tree protocol, STP, by selecting one of a plurality of bridges (to) of a computer network () as a root bridge () and by selecting one of a plurality of bridge ports (to,) of each of the plurality of bridges (to) as a root port (to), the method comprising the steps of: setting a sub-state of at least one bridge port (to) of at least one of the bridges (to) to an active sub-state in case that bidirectional traffic passes through the bridge port (to), receiving an STP message, in particular a Bridge Protocol Data Unit, BPDU, in one of the bridge ports (to) being in the active sub-state, and protecting the network configuration by discarding the STP message and/or by sending an alarm message to a network management unit () in case that the STP message indicates a change of the root bridge () of the network configuration.