Siemens SCALANCE X-300 Configuration Manual page 211

● Role
The "Role" column specifies which role the port adopts:
– Root
– Designated
– Alternate
– Backup
● FWD Transitions
The "FWD Transitions" column shows the number of changes from the listening status to
the forwarding status.
● Edge
The "Edge" column shows whether or not an end device is connected to the port.
With an end device, an IE switch can switch over the port faster without taking into
account spanning tree frames. If a spanning tree frame is received despite this setting,
the port automatically changes to the no status.
– yes
– no
● P.t.P.
There is a point-to-point link when two RSTP-compliant network components are
connected together over this port.
The following statuses are possible:
– Yes
– No
SCALANCE X-300 / X-400
Configuration Manual, 10/2014, C79000-G8976-C187-22
Configuration using Web Based Management and Command Line Interface
The port has the lowest path costs from the device itself to the CIST regional root
bridge.
Via this port, a connected network segment reaches the CIST regional root bridge with
minimum path costs.
The port is blocked and provides an alternative path to the CIST regional root bridge.
The port is blocked and provides an alternative path to a collision domain that is
already connected via a different port.
A n edge port is connected to this port.
There is a Spanning Tree or Rapid Spanning Tree device at this port.
T here is a point-to-point link.
T here is no a point-to-point link.
4.5 The Switch menu
211