Spanning tree bridge and route change method using the same

Details Spanning tree bridge and route change method using the same Spanning tree bridge and route change method using the same

2005-05-10

2005-05-10

Pezzlo, John (Department: 2662)

Multiplex communications

Network configuration determination

Using a particular learning algorithm or technique

C370S401000, C370S408000, C209S239000

Reexamination Certificate

active

06891808

ABSTRACT:
A controller changes a blocked port to a forwarding state when a link down or change of the representative bridge is detected and a receiving port of a bridge settled in the root bridge is a blocked port. When the bridge itself is not settled in a root bridge, a transmitter transmits to another bridge a TCN-BPDU that, when the bridge itself has received a BPDU inferior to itself BPDU, the representative bridge changes. A transmitter transmits to all other bridges a TC detection flag set BPDU when the bridge itself has received a TCN-BPDU and the bridge itself is settled in a root bridge. When the bridge itself is not settled in a root bridge and the bridge itself has received the TC detection flag set BPDU, such BPDU is transmitted in a direction other than root bridge direction, and the contents of a forwarding table of the bridge itself are deleted.

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ISO/IEC 15802-3; 1998 (E) ANSI/IEEE Std. 802. 1D, 1998 Edition, Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges, pp. 58-75. The Spanning Tree Algorithm and Protocol.

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