Siemens SCALANCE XB-200 - Page 148

Configuring with Web Based Management
5.5 The "Layer 2" menu
SCALANCE XB-200 Web Based Management
148 Configuration Manual, 04/2015, C79000-G8976-C360-02
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Topology Changes / Last Topology Change
The entry for the device shows the number of reconfiguration actions due to the spanning
tree mechanism since the last startup. For the root bridge, the time since the last
reconfiguration is displayed as follows:
– Seconds: sec unit after the number
– Minutes: min unit after the number
– Hour: hr unit after the number
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Bridge hello time [s] / Root hello time [s]
Each bridge sends configuration frames (BPDUs) regularly. The interval between two
such frames is the Hello time. The default for this parameter is 2 seconds.
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Bridge forward delay[s] / Root Forward Delay [s]
New configuration data is not used immediately by a bridge but only after the period
specified in the parameter. This ensures that operation is only started with the new
topology after all the bridges have the required information. The default for this parameter
is 15 seconds.
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Bridge Max Age / Root Max Age
Bridge Max Age defines the maximum "age" of a received BPDU for it to be accepted as
valid by the switch. The default for this parameter is 20.
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Reset Counters
Click this button to reset the counters on this page.
Steps in configuration
1. Enter the data required for the configuration in the input boxes.
2. Click the "Set Values" button.