Siemens SIMATIC NET SCALANCE W760 Series Configuration Manual page 76

Configuring with Web Based Management
5.4 "Information" menu
● Oper. Version
Describes the type of spanning tree in which the port operates
● Priority
If the path calculated by the spanning tree is possible over several ports of a device, the
port with the highest priority (in other words the lowest value for this parameter) is
selected. A value between 0 and 240 can be entered for the priority in steps of 16. If you
enter a value that cannot be divided by 16, the value is automatically adapted. The
default is 128.
● Path Cost
This parameter is used to calculate the path that will be selected. The path with the
lowest value is selected as the route. 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" box 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:
– 10,000 Mbps = 2,000
– 1000 Mbps = 20,000
– 100 Mbps = 200,000
– 10 Mbps = 2,000,000.
● Edge Type
Shows the type of the connection. The following values are possible:
– Edge Port
– No Edge Port
● P.t.P. Type
shows the type of the point-to-point link. The following values are possible:
– P.t.P.
– Shared Media
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A n edge port is connected to this port.
There is a spanning tree or rapid spanning tree device at this port.
With half duplex, a point-to-point link is assumed.
W ith a full duplex connection, a point-to-point link is not assumed.
Note
Point-to-point link means a direct connection between two devices. A shared media
connection is, for example, a connection to a hub.
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03