Allied Telesis AT-9000/28 - Spanning-Tree Max-Age

AT-9000 Switch Command Line User’s Guide
Section VI: Spanning Tree Protocols 543
SPANNING-TREE MAX-AGE
Syntax
spanning-tree max-age maxage
Parameters
maxage Specifies the maximum 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 on the switch. This
parameter determines how long the switch retains bridge protocol data
units (BPDUs) before it deletes them.
The forward time, maximum 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)
Confirmation Command
“SHOW SPANNING-TREE” on page 533
Example
This example sets the maximum age parameter to 10 seconds:
awplus> enable
awplus# configure terminal
awplus(config)# spanning-tree max-age 10