C
HAPTER
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| Spanning Tree Commands
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EXAMPLE
This example shows how to enable the Spanning Tree Algorithm for the
switch:
Console(config)#spanning-tree
Console(config)#
spanning-tree cisco-
prestandard
This command configures spanning tree operation to be compatible with
Cisco prestandard versions. Use the no form to restore the default setting.
[no] spanning-tree cisco-prestandard
DEFAULT SETTING
Disabled
COMMAND MODE
Global Configuration
COMMAND USAGE
Cisco prestandard versions prior to Cisco IOS Release 12.2(25)SEC do not
fully follow the IEEE standard, causing some state machine procedures to
function incorrectly. The command forces the spanning tree protocol to
function in a manner compatible with Cisco prestandard versions.
EXAMPLE
Console(config)#spanning-tree cisco-prestandard
Console(config)#
spanning-tree
forward-time
This command configures the spanning tree bridge forward time globally
for this switch. Use the no form to restore the default.
SYNTAX
spanning-tree forward-time seconds
no spanning-tree forward-time
seconds - Time in seconds. (Range: 4 - 30 seconds)
The minimum value is the higher of 4 or [(max-age / 2) + 1].
DEFAULT SETTING
15 seconds
COMMAND MODE
Global Configuration
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