Specifications

spanning-tree vlan max-age
197
spanning-tree vlan max-age
Sets the maximum valid time of BPDUs that are sent via PVST+.
Syntax
To set or change information:
spanning-tree vlan <VLAN ID list> max-age <Seconds>
To delete information:
no spanning-tree vlan <VLAN ID list> max-age
Input mode
(config)
Parameters
<VLAN ID list>
Starts configuration of PVST+ for the set VLAN.
1. Default value when this parameter is omitted:
This parameter cannot be omitted.
2. Range of values:
For details about how to set <VLAN ID list> and the specifiable values, see
Specifiable values for parameters.
<Seconds>
Sets the maximum valid time in seconds for BPDUs that are sent from the Switch.
1. Default value when this parameter is omitted:
This parameter cannot be omitted.
2. Range of values:
6 to 40 (seconds)
3. Note on using this parameter:
If you set a value less than 20, then this might result in a changeable topology.
Default behavior
The maximum valid time of BPDUs that can be sent from a Switch is set to 20 seconds.
Impact on communication
None
When the change is applied
The change is applied immediately after setting values are changed.
Notes
None
Related commands
None