Chapter 18
| Spanning Tree Commands
– 440 –
Command Mode
Global Configuration
Command Usage
This command sets the maximum time (in seconds) the root device will wait before
changing states (i.e., discarding to learning to forwarding). This delay is required
because every device must receive information about topology changes before it
starts to forward frames. In addition, each port needs time to listen for conflicting
information that would make it return to the discarding state; otherwise, temporary
data loops might result.
Example
Console(config)#spanning-tree forward-time 20
Console(config)#
spanning-tree
hello-time
This command configures the spanning tree bridge hello time globally for this
switch. Use the no form to restore the default.
Syntax
spanning-tree hello-time time
no spanning-tree hello-time
time - Time in seconds. (Range: 1-10 seconds).
The maximum value is the lower of 10 or [(max-age / 2) - 1].
Default Setting
2 seconds
Command Mode
Global Configuration
Command Usage
This command sets the time interval (in seconds) at which the root device transmits
a configuration message.
Example
Console(config)#spanning-tree hello-time 5
Console(config)#
Related Commands
spanning-tree forward-time (439)
spanning-tree max-age (441)
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