Allied Telesis AT-9000 Series - Manual (Page 625)

AT-9000 Switch Command Line User’s Guide
597
SPANNING-TREE MAX-AGE
Syntax
spanning-tree max-age maxage
Parameters
maxage
Specifies the max-age parameter. The range is 6 to 40 seconds.
The default is 20 seconds.
Mode
Global Configuration mode
Description
Use this command to set the maximum age parameter. This parameter
determines how long bridge protocol data units (BPDUs) are stored by the
switch before they are deleted.
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 form of this command, NO SPANNING-TREE MAX-AGE, to
set the command to its default value of 20 seconds.
Confirmation Command
“SHOW SPANNING-TREE” on page 592
Example
This example sets the maximum age parameter to 35 seconds:
awplus> enable
awplus# configure terminal
awplus(config)# spanning-tree max-age 35