13.
Rapid Spanning Tree Protocol (RSTP)
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rapid-spanning-tree enable/disable
The
rapid-spanning-tree enable/disable
command, in Protocol Configuration mode,
enables/disables the Rapid-Spanning Tree option.
When RSTP is disabled, you can still use the other commands to set the RSTP configuration.
These settings are preserved when RSTP is enabled.
By default, RSTP is disabled.
Command Syntax
device-name
(cfg protocol)#
rapid-spanning-tree
{
enable
|
disable
}
Argument Description
enable
Enable the spanning tree status.
disable
Disable the spanning tree status.
rapid-spanning-tree priority
The
rapid-spanning-tree priority
command, in Protocol Configuration mode, assigns the
specified value to the RSTP bridge priority. The
no
form of this command resets the default
value 32768.
If the command is issued without specifying the priority value, it will display the currently
configured priority value.
Command Syntax
device-name
(cfg protocol)#
rapid-spanning-tree priority <
0-65535
>
device-name
(cfg protocol)#
no rapid-spanning-tree priority
Argument Description
0-65535
The rapid spanning tree bridge priority in increments of 4096. Any other number will be
rounded down. The default value is 32768 (IEEE802.1w).
rapid-spanning-tree hello-time
The
rapid-spanning-tree hello-time
command, in Protocol Configuration mode, sets the
time interval, in seconds, between BPDU transmissions from the ports of this unit. You use
this command when the unit is the root of the Rapid Spanning Tree, or trying to become so.
The default value is 2 seconds and the range depends on the MaxAge value (between 1 and 10
seconds). The
no
form of this command resets this time interval to its default value.
NOTE
You cannot assign
hello-time
a value greater than
MaxAge
/2-1.
Command Syntax
device-name
(cfg protocol)#
rapid-spanning-tree hello-time <
hello-time
>
device-name
(cfg protocol)#
no rapid-spanning-tree hello-time