Reference Guide

Default 15 seconds
Format spanning-tree vlan vlan-list forward-time 4-30
Mode Global Config
Parameter Description
vlan-list
The VLANs to which to apply this command.
forward-
time
The spanning tree forward delay time. The range is 4-30 seconds.
spanning-tree vlan hello-time
Use this command to configure the spanning tree hello time for a specified VLAN or a range of VLANs.
The default is 2 seconds. Set this value to a lower number to accelerate the discovery of topology
changes.
Default 2 seconds
Format spanning-tree vlan vlan-list hello-time 1-10
Mode Global Config
Parameter Description
vlan-list
The VLANs to which to apply this command.
hello-time The spanning tree forward hello time. The range is 1-10 seconds.
spanning-tree vlan max-age
Use this command to configure the spanning tree maximum age time for a set of VLANs. The default is
20 seconds.
Set this value to a lower number to accelerate the discovery of topology changes. The network operator
must take into account the end-to-end BPDU propagation delay and message age overestimate for
their specific topology when configuring this value.
The default setting of 20 seconds is suitable for a network of diameter 7, lost message value of 3, transit
delay of 1, hello interval of 2 seconds, overestimate per bridge of 1 second, and a BPDU delay of 1
second. For a network of diameter 4, a setting of 16 seconds is appropriate if all other timers remain at
their default values.
Default
20 seconds
Format spanning-tree vlan vlan-list max-age 6-40
Mode Global Config
Switching Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 299