Configuration using Web Based Management and Command Line Interface
4.5 The Switch menu
SCALANCE X-300 / X-400
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Configuration Manual, 10/2014, C79000-G8976-C187-22
by the device. For this reason, the data shown here is read-only. If the device is a root
bridge, the information on the left and right matches.
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Bridge Priority / Root Priority
Which device becomes the root bridge is decided based on the bridge priority. The bridge
with the highest priority becomes the root bridge. The lower the value, the higher the
priority.
If several devices have the same priority in a network, the device with the lowest numeric
value in the MAC address becomes the root bridge.
Both parameters, bridge priority and MAC address together form the bridge identifier.
Since the root bridge manages all path changes, it should be located as centrally as
possible due to the delay of the frames.
Enter the priority of the device in the "Bridge Priority" input box.
The value of the bridge priority is an integral multiple of 4096 with the range of values
from 0 to 61440.
The "Root Priority" display box shows the priority of the CIST root bridge.
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Bridge Address / Root Address
The "Bridge Address" display box shows the MAC address of the device.
The "Root Address" display box shows the MAC address of the CIST root bridge.
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Root Port
The "Root Port" display box shows the port via which the device communicates with the
CIST root bridge.
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Root Cost
The "Root Cost" display box shows the path costs from this device to the CIST root
bridge.
●
Topology Changes / Last Topology Change
The "Topology Changes" display box shows the number of reconfiguration actions due to
the spanning tree mechanism since the last startup.
The "Last Topology Change" display box shows the time since the last reconfiguration as
follows:
–
Seconds: sec unit after the number
–
Minutes: min unit after the number
–
Hour: hr unit after the number
●
Bridge Hello Time [s] / Root Hello Time [s]
Each bridge regularly sends configuration frames (BPDUs).
Enter the interval between two configuration frames in the "Bridge Hello Time" input box.
The default value for this parameter is 2 seconds.
The "Root Hello Time" display box shows the interval between two configuration frames
at the root bridge.
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Bridge Forward Delay [s] / Root Forward Delay [s]
New configuration information is not used immediately by a bridge. This ensures that
operation is only started according to the new topology when all bridges have the
required information.
