Allied Telesis AT-8100 Series - Manual (Page 808)

Chapter 55: STP Commands
808
SPANNING-TREE FORWARD-TIME
Syntax
spanning-tree forward-time forwardtime
Parameters
forwardtime
Specifies the forward time. The range is 4 to 30 seconds. The
default is 15 seconds.
Mode
Global Configuration mode
Description
Use this command to set the forward time parameter on the switch. This
parameter specifies how long the ports remain in the listening and learning
states before they transition to the forwarding state.
This parameter is active only if the switch is acting as the root bridge of the
spanning tree domain. Switches that are not acting as the root bridge use
a dynamic value supplied by the root bridge.
The forward time, max-age and hello time parameters should be set
according to the following formulas, as specified in IEEE Standard 802.1d:
max-age <= 2 x (forward time - 1.0 second)
max-age >= 2 x (hello time + 1.0 second)
Use the no version of this command, NO SPANNING-TREE FORWARD-
TIME, to set the command to its default value of 15 seconds.
Confirmation Command
“SHOW SPANNING-TREE” on page 806
Example
This example sets the forward time on the switch to 25 seconds:
awplus> enable
awplus# configure terminal
awplus(config)# spanning-tree forward-time 25