Siemens SCALANCE X-300 Configuration Manual page 200

Configuration using Web Based Management and Command Line Interface
4.5 The Switch menu
STP Status
Shows whether spanning tree is enabled or disabled for the port.
Priority
If the path calculated by spanning tree is possible over several ports of a switch, the port with
the highest priority (in other words the lowest value for this parameter) is selected. A value
from 0 through 255 can be specified for the priority; the default is 128.
Admin Path Cost
Shows the value of the path costs to be used.
Calc Path Cost
If the value for Admin Path Cost is > 0, this value is adopted as Calculated Path Cost.
If the value for Admin Path Cost = 0, the value for Calculated Path Cost is calculated
automatically. The calculation of the path costs is largely based on the transmission speed.
The higher the achievable transmission speed is, the lower the value for Admin Path Cost
should be.
Typical values for path costs with spanning tree:
● 1000 Mbps = 4
● 100 Mbps = 19
● 10 Mbps = 100
Typical values for path costs with rapid spanning tree:
● 1000 Mbps = 20,000
● 100 Mbps = 200,000
● 10 Mbps = 2,000,000
State
Displays the current status of the port. The following statuses are possible:
● disabled
T he port only receives and is not involved in the STP configuration.
● blocking
I n the blocking mode, BPDUs are received.
● listening
I n this status, BPDUs are both received and sent. The port is involved in the spanning
tree algorithm.
● learning
S tage prior to the forwarding status, the port is actively learning the topology again (in
other words, the node addresses).
● forwarding
F ollowing the reconfiguration time, the port is once again active in the network; it receives
and forwards data frames.
FWD Transitions
Specifies the number of transitions from the listening to forwarding status.
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Configuration Manual, 10/2014, C79000-G8976-C187-22
SCALANCE X-300 / X-400