D-Link DES-3326S - Manual (Page 271)

DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Web-Based Switch Management 271
The Hello Time cannot be longer than the Max.
Age. Otherwise, a configuration error will occur.
Observe the following formulas when setting the
above parameters:
Max. Age ≤ 2 x (Forward Delay - 1 second)
Max. Age ≥ 2 x (Hello Time + 1 second)
STP Port Settings
The Spanning Tree Protocol (STP) operates on two levels: on the
switch level, the settings are globally implemented. On the port
level, the settings are implemented on a per user-defined
Group of ports basis.
To configure STP on a per user-defined group of ports
basis, click on the Spanning Tree folder and then click on
the STP Port Settings link: