Siemens SCALANCE W770 Series Configuration Manuals page 322

Network structures
7.3 Spanning Tree
The parameters have the following meaning:
Parameter
forward-time
seconds
hello-time
seconds
max-age
seconds
Note
Dependencies when setting the timing
If you specify the time settings for spanning tree, you need to keep to the following two rules:
● 2 * (forward-time - 1) ≥ max-age
● max-age ≥ 2 * (hello-time + 1)
Result
The selected setting for the time is configured.
Further notes
You reset the time settings to the default values with the no spanning-tree forward-
time, no spanning-tree hello-time or no spanning-tree max-age.
If you call the no spanning-tree command without parameters, you disable the spanning
tree function. The configured time settings are retained.
If you call the restart factory command, the system restarts with the factory configuration
settings All rime settings are reset.
You display these settings and other information with the commands that start with show
spanning-tree ....
no spanning-tree (time settings)
Description
With this command in conjunction with the relevant parameter you reset the time settings of
the spanning tree function to the default values.
322
Description
Keyword for the time after which a port
changes its spanning tree status from
"Blocking" to "Forwarding"
Time after which the changeover takes
place
Keyword for the time after which the
bridge sends its configuration BPDUs
Time after which they are sent
Keyword for the time after which the in‐
formation of the BPDUs becomes invalid
Maximum age of the BPDUs in seconds 6 ... 40
SCALANCE W770/W730 acc. to IEEE 802.11n Command Line Interface
Range of values / note
-
4 ... 30
Default: 15
-
1 ... 2
Default: 2
-
Default: 20
Configuration Manual, 09/2017, C79000-G8976-C324-08