Allied Telesis AT-8100 Series - Manual (Page 810)

Chapter 55: STP Commands
810
SPANNING-TREE HELLO-TIME
Syntax
spanning-tree hello-time hellotime
Parameters
hellotime
Specifies the hello time. The range is 1 to 10 seconds. The default
is 2 seconds.
Mode
Global Configuration mode
Description
Use this command to set the hello time parameter on the switch. This
parameter controls how frequently the switch sends spanning tree
configuration information when it is the root bridge or is trying to become
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)
To view the current setting for this parameter, refer to “SHOW
SPANNING-TREE” on page 806.
Use the no version of this command, NO SPANNING-TREE HELLO-
TIME, to set the command to its default value of 2 seconds.
Confirmation Command
“SHOW SPANNING-TREE” on page 806
Example
This example sets the hello time parameter on the switch to 7 seconds:
awplus> enable
awplus# configure terminal
awplus(config)# spanning-tree hello-time 7