D-Link DES-3250TG User manual

DES-3250TG
Standalone Layer 2 Switch
User’s Guide
Second Edition (July 2003)
651TG3250035
Printed In Taiwan
RECYCLABLE

D-Link Offices for Registration and Warranty Service
The product's Registration Card, provided at the back of this manual, must be
sent to a D-Link office. To obtain an RMA number for warranty service as to a
hardware product, or to obtain warranty service as to a software product,
contact the D-Link office nearest you. An address/telephone/fax/e-mail/Web
site list of D-Link offices is provided in the back of this manual.
Trademarks
Copyright 2003 D-Link Corporation.
Contents subject to change without prior notice.
D-Link is a registered trademark of D-Link Corporation/D-Link
Systems, Inc. All other trademarks belong to their respective
proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by any
means or used to make any derivative such as translation,
transformation, or adaptation without permission from D-Link
Corporation/D-Link Systems Inc., as stipulated by the United States
Copyright Act of 1976.
FCC Warning
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with
this user’s guide, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product
may cause radio interference in which case the user may be required
to take adequate measures.

VCCI Warning

v
Table of Contents
Introduction............................................................................1
Features ...............................................................................1
Ports ..................................................................................1
Performance Features...........................................................2
Traffic Classification and Prioritization ............................... 3
Management ......................................................................4
Fast Ethernet Technology .....................................................5
Gigabit Ethernet Technology.................................................5
Unpacking and Setup..............................................................6
Unpacking ............................................................................6
Installation ...........................................................................7
Desktop or Shelf Installation ..............................................7
Rack Installation................................................................8
Power on...............................................................................9
Power Failure ................................................................... 10
Identifying External Components ..........................................11
Front Panel.........................................................................11
Rear Panel ..........................................................................12
Side Panels.........................................................................13
Gigabit Combo Ports...........................................................13
LED Indicators ...................................................................14
Connecting The Switch..........................................................16
Switch to End Node ............................................................16
Switch to Hub or Switch .....................................................17
10BASE-T Device .............................................................18
100BASE-TX Device.........................................................18
Switch Management and Operating Concepts .......................19
Local Console Management ................................................19
Diagnostic (console) port (RS-232 DCE)............................20

vi
Switch IP Address...............................................................21
SNMP .................................................................................23
MIBs...................................................................................25
Packet Forwarding..............................................................26
802.1w Rapid Spanning Tree ..............................................27
Link Aggregation.................................................................30
VLANs ................................................................................32
IP Addresses .......................................................................40
Internet Protocols ...............................................................47
Packet Headers...................................................................54
Web-Based Switch Management............................................63
Introduction .......................................................................63
Before You Start .................................................................64
Getting Started ...................................................................64
Configuring the Switch .......................................................65
User Accounts Management.............................................65
Save Changes...................................................................67
Using Web-Based Management...........................................69
Configuration .....................................................................74
IP Address........................................................................74
Switch Information...........................................................78
Advanced Settings............................................................79
Port Configuration............................................................81
Port Mirroring ..................................................................84
Link Aggregation ..............................................................86
IGMP................................................................................89
Spanning Tree..................................................................94
Forwarding Filtering.......................................................102
VLANs............................................................................105
Port Bandwidth .............................................................. 112
SNTP Settings ................................................................ 114
Port Security .................................................................. 118
QOS (Quality of Service) .................................................121
Access Profile Table........................................................ 130
PAE Access Entity .......................................................... 138
Management..................................................................... 150
Security IP ..................................................................... 150

vii
User Accounts................................................................152
SNMPV3.........................................................................153
Monitoring........................................................................166
Port Utilization ...............................................................166
Packets .......................................................................... 168
Errors ............................................................................176
Size ................................................................................ 182
MAC Address .................................................................186
IGMP Snooping Group ...................................................188
IGMP Snooping Forwarding............................................190
VLAN Status ..................................................................191
Router Port ....................................................................191
Port Access Control ........................................................ 192
Maintenance..................................................................... 193
TFTP Utilities .................................................................193
Switch History................................................................196
Ping Test ........................................................................ 197
Save Changes................................................................. 197
Reboot Services.............................................................. 198
Logout............................................................................ 200
Warranty and Registration ..................................................201
All countries and regions except USA .............................201
USA Only .......................................................................204
Technical Specifications ...................................................... 208
Understanding and Troubleshooting the Spanning Tree
Protocol............................................................................... 211
Brief Review of Bitwise Logical Operations...........................227
Index................................................................................... 229

DES-3250TG Layer 2 Fast Ethernet Switch User’s Guide
1
1
INTRODUCTION
This section describes the functionality features of the
DES-3250TG.
Features
The DES-3250TG Switch was designed for easy installation
and high performance in an environment where traffic on the
network and the number of users increase continuously.
Switch features include:
Ports
• Forty-eight high-performance NWay ports all operating
at 10/100 Mbps for connecting to end stations, servers
and hubs.
• All 48 10/100 UTP ports can auto-negotiate (NWay)
between 10Mbps/100Mbps, half-duplex or full duplex.
• One front panel slide-in module interface for a 2-port
1000BASE-T module (provided) and one front panel
slide-in module interface for a 2-port Mini GBIC Gigabit

DES-3250TG Layer 2 Fast Ethernet Switch User’s Guide
2
Ethernet module (optional). Please note that although
these two front panel modules can be used
simultaneously, the ports must be different. For
example, if port 49x is used on the Mini GBIC module,
port 49x is not available on the 1000BASE-T module,
and vice versa.
• RS-232 DCE Diagnostic port (console port) for setting up
and managing the Switch via a connection to a console
terminal or PC using a terminal emulation program.
Performance Features
• Store and forward switching scheme.
• Full and half-duplex for both 10Mbps and 100Mbps
connections. The front-port Gigabit Ethernet module
operates at full duplex only. Full duplex allows the
switch port to simultaneously transmit and receive data,
and only works with connections to full-duplex capable
end stations and switches. Connections to hubs must
take place at half-duplex.
• Auto-polarity detection and correction of incorrect
polarity on the transmit and receive twisted-pair at each
port.
• IEEE 802.3z compliant for Mini GBIC ports (optional
module).
• IEEE 802.3ab compliant for 1000BASE-T (Copper)
Gigabit ports (optional module).
• Data forwarding rate 14,880 pps per port at 100% of
wire-speed for 10Mbps speed.