DES-3326 Layer 3 Fast Ethernet Switch User’s Guide

Figure 6-72. Configure Spanning Tree - Global

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 basis.

The factory default setting should cover the majority of installations. It is advisable to keep the default settings as set at the factory; unless, it is absolutely necessary to change them.

The following fields can be set:

 

 

 

Parameter

Description

 

Status:<Enabled>

This field can be toggled between Enabled and Disabled using the

 

 

 

space bar. This will enable or disable the Spanning Tree Protocol

 

 

 

(STP), globally, for the switch.

 

 

STP

 

 

This field can be toggled using the space bar to select any of the STP

Group:<Default>

groups that have been configured on the switch.

Max. Age: [

]

 

The Max. 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.

Hello Time:[

]

The 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.

Forward Delay:[ ]

The 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.

Priority:[ ]

 

 

A 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.

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D-Link DES-3326 manual Status Enabled, Group Default, Max. Age, Hello Time, Forward Delay, Priority