D-Link DES-3250TG User Manual - page 59

D-Link DES-3250TG Standalone Layer 2 Switch

The following fields can be set: 

Parameter 

              Description 

Spanning Tree 

Protocol <Disabled> 

This field can be toggled between Enabled

and Disabledusing the pull-down menu. This 

will enable or disable the Spanning Tree 

Protocol (STP), globally, for the switch. 

Bridge Max Age  (6-40 

Sec) <20 > 

The Bridge Maximum Age can be set from 6 

to 40 seconds. At the end of the Max. Age, if 

a BPDU has still not been received from the 

Root Bridge, your switch will start sending 

its own BPDU to all other switches for 

permission to become the Root Bridge. If it 

turns out that your switch has the lowest 

Bridge Identifier, it will become the Root 

Bridge. 

Bridge Hello Time (1-

10 Sec) < 2 > 

The Bridge Hello Time can be set from 1 to 

10 seconds. This is the interval between two 

transmissions of BPDU packets sent by the 

Root Bridge to tell all other switches that it is 

indeed the Root Bridge. 

Bridge Forward Delay 

(4-30 sec) <15 > 

The Bridge Forward Delay can be from 4 to 

30 seconds. This is the time any port on the 

switch spends in the listening state while 

moving from the blocking state to the 

forwarding state. 

Bridge Priority (0- 

65535 Sec) <32768> 

A Bridge Priority for the switch can be set 

from 0 to 65535. This number is used in the 

voting process between switches on the 

network to determine which switch will be 

the root switch. A low number indicates a 

high priority, and a high probability that this 

switch will be elected as the root switch. 

STP Version 

Choose rstp or StpCompatibility. Both 

versions use STP parameters in the same 

way. RSTP is fully compatible with IEEE 

802.1d STP and will function with legacy 

equipment. 

TX Hold Count(1-10) 

This is the maximum number of Hello 

packets transmitted per interval. The count 

can be specified from 1 to 10. The default 

value is 3. 

Forwarding BPDU 

<Enabled>  

This allows you to control whether or not to 

forward Bridge Protocol Data Units. 

Disabling this setting can be useful if, for 

example, the present switch has been 

designated as the root bridge and you do not 

want that status to change.   

Note:   The Hello Time cannot be longer than the Max. Age. Otherwise, a configuration error will occur.

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