This window appears when you select one or more VLANs and click Modify on the Root Parameters tab of the STP window.
For most devices, you can enter new values in any of the fields. (An exception is the Protocol field; it is a read-only field if the device is a Catalyst 3550 switch.) If you need help, see the Root Parameters Table.
In the Max Age field, you can enter values from 6 to 200 seconds, unless the device is a Catalyst 3550 switch. In that case, the range is 6 to 40 seconds.
In the Forward Delay field, you can enter values from 4 to 200 seconds, unless the device is a Catalyst 3550 switch. In that case, the range is 4 to 30 seconds.
Click OK when you finish with the window.