Siemens SCALANCE XM-400 Configuration Manual page 93

● Status
Displays the current status of the port. The values are only displayed. The parameter
depends on the configured protocol. The following statuses are possible:
– Discarding
– Listening
– Learning
– Forwarding
● 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. If several ports of a device have the same value, the port with the lowest
port number will be selected.
If the value in the "Cost Calc." box is "0", the automatically calculated value is shown.
Otherwise, the value of the "Cost Calc." 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.
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
The port receives BPDU frames. Other incoming or outgoing frames are discarded.
The port receives and sends BPDU frames. The port is involved in the spanning tree
algorithm. Other outgoing and incoming frames are discarded.
The port actively learns the topology; in other words, the node addresses. Other
outgoing and incoming frames are discarded.
Following the reconfiguration time, the port is active in the network. The port receives
and sends data frames.
Configuring with Web Based Management
5.3 The "Information" menu
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