Web Interface

STA (Spanning Tree Algorithm)

The Spanning Tree Algorithm can be used to detect and disable network loops, and to provide backup links between switches, bridges or routers. This allows the switch to interact with other bridging devices (that is, STA-compliant switch, bridge or router) in your network to ensure that only one route exists between any two stations on the network. For a more detailed description of how to use this algorithm, refer to “Spanning Tree Algorithm” on page 4-1.

Spanning Tree Information

The Spanning Tree Information screen displays a summary of the STA information for the overall bridge or for a specific port. To make any changes to the parameters for the Spanning Tree, use the STA Configuration and STA Port Configuration screens.

Spanning Tree

The parameters shown in the following figure and table describe the current bridge STA Information.

Parameter

Description

 

 

Spanning Tree State

Shows if the switch is enabled to participate in an STA-compliant network.

Bridge ID

A unique identifier for this bridge, consisting of bridge priority plus MAC

 

address (where the address is normally taken from Port 1).

Max Age

The maximum time (in seconds) a device can wait without receiving a

 

configuration message before attempting to reconfigure.

Hello Time

The time interval (in seconds) at which the root device transmits a

 

configuration message.

Forward Delay

The maximum time (in seconds) the root device will wait before changing

 

states (i.e., listening to learning to forwarding).

Root Port

The number of the port on this switch that is closest to the root. This switch

 

communicates with the root device through this port. If there is no root port,

 

then this switch has been accepted as the root device of the spanning tree

 

network.

Designated Root

The priority and MAC address of the device in the spanning tree that this

 

switch has accepted as the root device.

Root Path Cost

The path cost from the root port on this switch to the root device.

Configuration Changes

The number of times the spanning tree has been reconfigured.

Last Topology Change

The time since the spanning tree was last reconfigured.

 

 

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Alcatel Carrier Internetworking Solutions 8008 manual STA Spanning Tree Algorithm, Spanning Tree Information
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8008 specifications

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