D-Link DES-2212 manual Using the Console Interface

User’s Guide

♦Forward Delay (sec) Indicates how fast any port on the DES-2212 can change its spanning state when moving towards the forwarding state. This value determines how long the port stays in each of the listening and learning states, which precede the forwarding state.

♦Bridge Max Age When the value you set for this parameter expires, and the DES-2212 still has not received a BPDU from the root bridge, it will start sending its own BPDU to all other bridges for permission to become the root bridge. If it turns out that the DES-2212 has the lowest bridge identifier, it will then become the root bridge. Bridge Max Age ranges from 6 to 40 seconds, with 20 seconds as the default value.

♦Bridge Hello Time This is the interval between two consecutive transmissions of BPDU packets sent by the root bridge to inform all other bridges that it is indeed the root bridge. If you set a Bridge Hello Time for a bridge that is not the root bridge, the setting will be used if and when this bridge becomes the root bridge. Bridge Hello Time ranges from 1 to 10 seconds, with 2 seconds as default.

♦Bridge Forward Delay. Bridge Forward Delay ranges from 4 to 30 seconds. This is the time any port on the DES-2212 spends in the “listening state” while moving from “blocking state” to “forwarding state”.

Use the following formulas when setting this parameter: Bridge Max Age ≥ 2 · (Bridge Hello Time + 1 second) Bridge Max Age ≤ 2 · (Bridge Forward Delay - 1 second)

♦Bridge Priority FIXME This parameter sets the priority number of the system. Valid value ranges from 0 to 65535, with 0 being the highest bridge priority. Default value is 32768.

To set the STP port parameters for the switch,

1.Choose Spanning Tree Algorithm Parameters from the main menu.

Using the Console Interface 47