Siemens SCALANCE XB-200 - Page 54

Configuring with Web Based Management
5.3 The "Information" menu
SCALANCE XB-200 Web Based Management
54 Configuration Manual, 04/2015, C79000-G8976-C360-02
The table has the following columns:
●
Port
Shows the port via which the device communicates. The port is made up of the module
number and the port number, for example port 0.1 is module 0, port 1.
●
Role
Shows the status of the port. The following values are possible:
– Disabled
The port was removed manually from the spanning tree and will no longer be taken
into account by the spanning tree.
– Designated
The ports leading away from the root bridge.
– Alternate
The port with an alternative route to a network segment
– Backup
If a switch has several ports to the same network segment, the "poorer" Port becomes
the backup port.
– Root
The port that provides the best route to the root bridge.
– Master
This port points to a root bridge located outside the MST region.
●
State
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
The port receives BPDU frames. Other incoming or outgoing frames are discarded.
– Listening
The port receives and sends BPDU frames. The port is involved in the spanning tree
algorithm. Other outgoing and incoming frames are discarded.
– Learning
The port actively learns the topology; in other words, the node addresses. Other
outgoing and incoming frames are discarded.
– Forwarding
Following the reconfiguration time, the port is active in the network. The port receives
and sends data frames.
●
Oper. Version
Describes the type of spanning tree in which the port operates
●
Priority
If the path calculated by 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.