Siemens SCALANCE W788-1PRO Operating Instructions Manual page 195

Configuration Using Web Based Management and the Command Line Interface
The bridge with the highest prior
this parameter) becomes the root bridge. If several network components in a
network have the same priority, the station whose MAC address has the
lowest numeric value will become the root bridge. Both parameters, bridg
priority and MAC address together form
bridge manages all path changes, it should be located as centrally as
possible due to the propagation time of the frames. The value for the bridge
priority is a whole m
61440.
Max Age text box
Max Age is the time that a bridge waits for a configuration frame (BPDU).
When this time has elapsed, the bridge attempts to reconfig
The default for this parameter is 20 seconds.
Hello Time
Each bridge regularly sends configuration frames (B
between two such frames is the Hello Time. The default for this parameter is
2 seconds.
Forwar d Delay text box
New configuration data is not used immediately by a bridge but only a
period specif
is only starte
information. The default for this parameter is 11 secon
Syntax of the Command Line Interface
CLI\BRIDGE\SPANNING>
Command
info
spanning [E|D]
version [R | S]
bridge [0 ... 61440]
hellotm [1 ... 10]
fwd_delay [ 4 .. 30] .
maxage [6 ... 40]
Operating Instructions SCALANCE W78x
C79000-G8976-C184-07
ultiple of 4096 with a range of values from 0 through
text box
ied in the Forward Delay parameter. This ensures that operation
d with the new topology after all the bridges have the required
Description
Displays the current Spanning Tree
configuration.
Enables (E) or disables (D) the (R)STP
algorithm.
Specifies whether the Rapid Spanning
Tree (R) or Spanning Tree (S) mode is
used.
This specifies the bridge priority for the
SCALANCE W:
Specifies the interval between two
BPDUs in seconds.
Specifies the delay time for the
effectiveness of configuration
information (specified in seconds).
Maximum age for configuration
information. (specified in seconds)
ity (in other words, with the lowest value for
the Bridge Identifier. Since the root
PDUs). The interval
ds.
Default value: 32768
Default v
Default value: 11 s
Default value: 20 s
e
ure the network.
fter the
Comment
alue: 2 s
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