Siemens SCALANCE W780 Configuration Manual page 256
Simatic net industrial wireless lan to ieee 802.11n web based management
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- Configuration manual (456 pages) ,
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Configuring with Web Based Management
5.7 "Layer 2" menu
Table 2 has the following columns:
● Port
Shows all available ports and the following interfaces.
– Port X
– WLAN X
– VAP X.Y
– WDS X.Y
● Spanning Tree Status
Specify whether the port is integrated in the spanning tree or not.
Note
If you disable the "Spanning Tree Status" option for a port, this may cause the formation
of loops. The topology must be kept in mind.
● Priority
Enter the priority of the port. The priority is only evaluated when the path costs are the
same.
The value must be divisible by 16. If the value that cannot be divided by 16, the value is
automatically adapted.
Range of values: 0 - 240.
The default is 128.
● Cost Calc
Enter the path cost calculation. If you enter the value "0" here, the automatically
calculated value is displayed in the "Path Cost" box.
● Path Cost
The path costs from this port to the root bridge. The path with the lowest value is selected
as the path. If several ports of a device have the same value, the port with the lowest port
number is selected.
If the value in the "Cost Calc" field is "0", the automatically calculated value is displayed.
Otherwise, the value of the "Cost Calc" box is displayed.
The calculation of the path costs is largely based on the transmission speed. The higher
the achievable transmission speed is, the lower the value of the path costs.
Typical values for path costs with rapid spanning tree:
– 1000 Mbps = 20,000
– 100 Mbps = 200,000
– 10 Mbps = 2,000,000
The values can, however, also be set individually.
256
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
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