Spanning-tree max-age – Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) User Manual
Page 537
Spanning Tree Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A
AlliedWare Plus
TM
Operating System - Version 5.4.4C
19.47
spanning-tree max-age
Use this command to set the max-age. This sets the maximum age, in seconds, that
dynamic spanning tree configuration information is stored in the switch before it is
discarded.
Use this command for RSTP, STP or MSTP.
Use the no variant of this command to restore the default of max-age.
Syntax
spanning-tree max-age <max-age>
no spanning-tree max-age
Default
The default of spanning-tree max-age is 20 seconds.
Mode
Global Configuration
Usage
Max-age is the maximum time in seconds for which a message is considered valid.
Configure this value sufficiently high, so that a frame generated by the root bridge can be
propagated to the leaf nodes without exceeding the max-age.
The forward delay, max-age, and hello time parameters should be set according to the
following formula, as specified in IEEE Standard 802.1d:
2 x (forward delay - 1.0 seconds) >= max-age
max-age >= 2 x (hello time + 1.0 seconds)
Example
Related Commands
show spanning-tree
spanning-tree forward-time
Parameter
Description
<max-age>
<6-40> The maximum time, in seconds.
awplus#
configure terminal
awplus(config)#
spanning-tree max-age 12