D-Link DES-2108/E [46/199] User changeable sta parameters

24-port NWay Ethernet Switch User’s Guide

32 Switch Management

On the Port Level

♦ Root Port Each switch has a Root Port. This is the port

that has the lowest Path Cost to the Root Bridge. In case

there are several such ports, then the one with the lowest

Port Identifier is the Root Port.

♦ Designated Port This is the port on each Designated

Bridge that is attached to the LAN segment for which the

switch is the Designated Bridge.

♦ Port Priority The smaller this number, the higher the

Port Priority is. With higher Port Priority, the higher the

probability that the port will be selected as the Root Port.

♦ Path Cost This is a changeable parameter and may be

modified according to the STA specification. The 100Mbps

segment has an assigned Path Cost of 10, and each 10Mbps

segment has an assigned Path Cost of 100, based on the STA

specifications.

User-Changeable STA Parameters

The factory default setting should cover the majority of

installations. However, it is advisable to keep the default settings

as set at the factory; unless, it is absolutely necessary. The user

changeable parameters in the Switch are as follows:

♦ Bridge Priority A Bridge Priority can be from 0 to 65535. 0

is equal to the highest Bridge Priority.

♦ Bridge Hello Time The Hello Time can be 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. If you set a Hello

Time for your Switch, and it is not the Root Bridge, the set

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Interface