ZyXEL GS-2024 User Guide

Dimension

GS-2024

Gigabit Ethernet Switch

October 2004

Version 3.50

User’s Guide

Dimension GS-2024 Gigabit Ethernet Switch

Copyright

Copyright © 2004 by ZyXEL Communications Corporation

The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval
system, translated into any language, or transmitted in any form or by any means, electronic, mechanical,
magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL
Communications Corporation.

Published by ZyXEL Communications Corporation. All rights reserved.

Disclaimer

ZyXEL does not assume any liability arising out of the application or use of any products, or software described
herein. Neither does it convey any license under its patent rights nor the patents rights of others. ZyXEL further
reserves the right to make changes in any products described herein without notice. This publication is subject to
change without notice.

Trademarks

Trademarks mentioned in this publication are used for identification purposes only and may be properties of their
respective owners.

ii Copyright

Dimension GS-2024 Gigabit Ethernet Switch

ZyXEL Limited Warranty

ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or
workmanship for a period of up to two (2) years from the date of purchase. During the warranty period and upon
proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials,
ZyXEL will, at its discretion, repair or replace the defective products or components without charge for either
parts or labor and to whatever extent it shall deem necessary to restore the product or components to proper
operating condition. Any replacement will consist of a new or re-manufactured functionally equivalent product of
equal value, and will be solely at the discretion of ZyXEL. This warranty shall not apply if the product is
modified, misused, tampered with, damaged by an act of God, or subjected to abnormal working conditions.

Note

Repair or replacement, as provided under this warranty, is the exclusive remedy of the purchaser. This warranty is
in lieu of all other warranties, express or implied, including any implied warranty of merchantability or fitness for
a particular use or purpose. ZyXEL shall in no event be held liable for indirect or consequential damages of any
kind of character to the purchaser.

To obtain the services of this warranty, contact ZyXEL's Service Center for your Return Material Authorization
number (RMA). Products must be returned Postage Prepaid. It is recommended that the unit be insured when
shipped. Any returned products without proof of purchase or those with an out-dated warranty will be repaired or
replaced (at the discretion of ZyXEL) and the customer will be billed for parts and labor. All repaired or replaced
products will be shipped by ZyXEL to the corresponding return address, Postage Paid. This warranty gives you
specific legal rights, and you may also have other rights that vary from country to country.

ZyXEL Limited Warranty iii

Dimension GS-2024 Gigabit Ethernet Switch

Interference Statements and Warnings

FCC Interference Statement

This switch complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:

(1) This switch may not cause harmful interference.

(2) This switch must accept any interference received, including interference that may cause undesired operations.

FCC Warning

This equipment has been tested and found to comply with the limits for a Class A digital switch, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, 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.

Taiwanese BSMI (Bureau of Standards, Metrology and Inspection) A Warning:

Certifications

Go to www.zyxel.com

Select your product from the drop-down list box on the ZyXEL home page to go to that product's page.

Select the certification you wish to view from this page.

Registration

Register your product online for free future product updates and information at www.zyxel.com for global
products, or at www.us.zyxel.com

for North American products.

iv Interference Statements and Warnings

Dimension GS-2024 Gigabit Ethernet Switch

Customer Support

If you have questions about your ZyXEL product or desire assistance, contact ZyXEL Communications
Corporation offices worldwide, in one of the following ways:

Contacting Customer Support

When you contact your customer support representative, have the following information ready:

♦ Product model and serial number.

♦ Firmware version information.

♦ Warranty information.

♦ Date you received your product.

♦ Brief description of the problem and the steps you took to solve it.

LOCATION

WORLDWIDE

SUPPORT E-MAIL TELEPHONE1 WEB SITE METHOD

SALES E-MAIL FAX1 FTP SITE

[e-mail] [phone] www.zyxel.com

[e-mail]

[e-mail] [phone]

[e-mail]

[e-mail] [phone] www.zyxel.de GERMANY

[e-mail]

[e-mail] [phone] SPAIN

[e-mail]

[e-mail] [phone] www.zyxel.dk DENMARK

[e-mail]

[e-mail] [phone] www.zyxel.no NORWAY

[e-mail]

[e-mail] [phone] www.zyxel.se SWEDEN

[e-mail]

[e-mail] [phone] www.zyxel.fi FINLAND

[e-mail]

[phone] ftp.europe.zyxel.com

[phone]

[phone] ftp.us.zyxel.com

[phone]

[phone] FRANCE [e-mail]

[phone]

[phone]

[phone]

[phone]

[phone]

[phone]

www.europe.zyxel.com

ftp.zyxel.com

www.us.zyxel.com NORTH AMERICA

www.zyxel.fr ZyXEL France

www.zyxel.es

ZyXEL Communications

ZyXEL Communications Corp.
6 Innovation Road II
Science Park
Hsinchu 300
Taiwan

ZyXEL Communications Inc.
1130 N. Miller St.
Anaheim
CA 92806-2001
U.S.A.

ZyXEL Deutschland GmbH. Adenauerstr.
20/A2 D-52146
Wuerselen
Germany

1 rue des Vergers
Bat. 1 / C
69760 Limonest
France

Alejandro Villegas 33
1º, 28043 Madrid
Spain

ZyXEL Communications A/S
Columbusvej 5
2860 Soeborg
Denmark

ZyXEL Communications A/S
Nils Hansens vei 13
0667 Oslo
Norway

ZyXEL Communications A/S
Sjöporten 4, 41764 Göteborg
Sweden

ZyXEL Communications Oy
Malminkaari 10
00700 Helsinki
Finland

REGULAR MAIL

1

“+” is the (prefix) number you enter to make an international telephone call.

Customer Support v

Dimension GS-2024 Gigabit Ethernet Switch

Table of Contents

Copyright..................................................................................................................................................ii

ZyXEL Limited Warranty .........................................................................................................................iii

Interference Statements and Warnings...................................................................................................iv

Customer Support................................................................................................................................... v

List of Figures........................................................................................................................................xiii

List of Tables ........................................................................................................................................ xvii

Preface.................................................................................................................................................. xix

Part I: ........................................................................................................................................................... I

Chapter 1 Getting to Know the GS-2024 ............................................................................................. 1-1

1.1 Introduction ........................................................................................................................................... 1-1

1.2 Features ................................................................................................................................................. 1-1

1.3 Applications .......................................................................................................................................... 1-3

Part II: ......................................................................................................................................................... II

Chapter 2 Hardware Installation........................................................................................................... 2-1

2.1 Installation Scenarios ............................................................................................................................ 2-1

Chapter 3 Hardware Connections........................................................................................................ 3-1

3.1 Safety Warnings .................................................................................................................................... 3-1

3.2 Front Panel ............................................................................................................................................ 3-1

3.3 Rear Panel .............................................................................................................................................3-4

3.4 Front Panel LEDs.................................................................................................................................. 3-5

3.5 Configuring the GS-2024...................................................................................................................... 3-6

Part III: ....................................................................................................................................................... III

Chapter 4 Introducing the Web Configurator................................................................................... 4-1

4.1 Introduction ........................................................................................................................................... 4-1

4.2 System Login ........................................................................................................................................ 4-1

4.3 Status Screen ......................................................................................................................................... 4-1

4.4 Switch Lockout ..................................................................................................................................... 4-6

4.5 Resetting the Switch.............................................................................................................................. 4-6

Chapter 5 System Status and Port Details ...................................................................................... 5-1

5.1 About System Statistics and Information.............................................................................................. 5-1

Table of Contents vii

Dimension GS-2024 Gigabit Ethernet Switch

5.2 Port Status Summary .............................................................................................................................5-1

Chapter 6 Basic Setting .................................................................................................................. 6-1

6.1 Introducing the Basic Setting Screens................................................................................................... 6-1

6.2 System Information ............................................................................................................................... 6-1

6.3 General Setup ........................................................................................................................................ 6-3

6.4 Introduction to VLANs..........................................................................................................................6-4

6.5 IGMP Snooping..................................................................................................................................... 6-5

6.6 Switch Setup Screen.............................................................................................................................. 6-5

6.7 IP Setup .................................................................................................................................................6-7

6.8 Port Setup .............................................................................................................................................. 6-8

Part IV: ...................................................................................................................................................... IV

Chapter 7 VLAN.............................................................................................................................. 7-1

7.1 Introduction to IEEE 802.1Q Tagged VLAN........................................................................................ 7-1

7.2 802.1Q VLAN ....................................................................................................................................... 7-3

7.3 Introduction to Port-based VLANs .......................................................................................................7-8

Chapter 8 Static MAC Forward Setup............................................................................................. 8-1

8.1 Introduction to Static MAC Forward Setup ..........................................................................................8-1

8.2 Configuring Static MAC Forwarding.................................................................................................... 8-1

8.3 Viewing and Editing Static MAC Forwarding Rules............................................................................8-2

Chapter 9 Spanning Tree Protocol.................................................................................................. 9-1

9.1 Introduction to Spanning Tree Protocol (STP)...................................................................................... 9-1

9.2 STP Status .............................................................................................................................................9-2

Chapter 10 Bandwidth Control........................................................................................................ 10-1

10.1 Introduction to Bandwidth Control .....................................................................................................10-1

Part V: ........................................................................................................................................................ V

Chapter 11 Broadcast Storm Control ...............................................................................................11-1

11.1 Introducing Broadcast Storm Control .....................................................................................................11-1

11.2 Configuring Broadcast Storm Control.....................................................................................................11-1

Chapter 12 Mirroring ....................................................................................................................... 12-1

12.1 Introduction to Port Mirroring................................................................................................................. 12-1

12.2 Port Mirroring Configuration ..................................................................................................................12-1

Chapter 13 Link Aggregation .......................................................................................................... 13-1

viii Table of Contents

Dimension GS-2024 Gigabit Ethernet Switch

13.1 Introduction to Link Aggregation ...........................................................................................................13-1

13.2 Link Aggregation Protocol Status........................................................................................................... 13-2

13.3 Link Aggregation Setup .......................................................................................................................... 13-3

Chapter 14 Port Authentication ....................................................................................................... 14-1

14.1 Introduction to Authentication ................................................................................................................ 14-1

14.2 Configuring Port Authentication............................................................................................................. 14-1

Chapter 15 Port Security ................................................................................................................. 15-1

15.1 About Port Security................................................................................................................................. 15-1

15.2 Port Security Setup.................................................................................................................................. 15-1

Chapter 16 Access Control .............................................................................................................16-1

16.1 About Access Control ............................................................................................................................. 16-1

16.2 Access Control Overview........................................................................................................................ 16-1

16.3 About SNMP........................................................................................................................................... 16-2

16.4 Service Access Control ........................................................................................................................... 16-6

16.5 Remote Management .............................................................................................................................. 16-6

Chapter 17 Differentiated Services .................................................................................................17-1

17.1 Introduction to DiffServ.......................................................................................................................... 17-1

17.2 DSCP-to-IEEE802.1p Priority Mapping................................................................................................. 17-2

Chapter 18 Queuing Method ........................................................................................................... 18-1

18.1 Introduction to Queuing .......................................................................................................................... 18-1

18.2 Configuring Queuing .............................................................................................................................. 18-2

Part VI:....................................................................................................................................................... VI

Chapter 19 Routing Protocol ........................................................................................................... 19-1

19.1 Static Route ............................................................................................................................................. 19-1

Chapter 20 Maintenance ................................................................................................................. 20-1

20.1 Maintenance ............................................................................................................................................ 20-1

20.2 Firmware Upgrade .................................................................................................................................. 20-1

20.3 Restore a Configuration File ................................................................................................................... 20-2

20.4 Backing Up a Configuration File ............................................................................................................ 20-2

20.5 Load Factory Defaults............................................................................................................................. 20-3

20.6 Reboot System ........................................................................................................................................ 20-3

20.7 Command Line FTP................................................................................................................................ 20-3

Table of Contents ix

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 21 Diagnostic .................................................................................................................... 21-1

21.1 Diagnostic................................................................................................................................................21-1

Chapter 22 Cluster Management.................................................................................................... 22-1

22.1 Introduction to Cluster Management....................................................................................................... 22-1

22.2 Cluster Management Status.....................................................................................................................22-2

22.3 Configuring Cluster Management ...........................................................................................................22-4

Chapter 23 MAC Table.................................................................................................................... 23-1

23.1 Introduction to MAC Table..................................................................................................................... 23-1

23.2 Viewing MAC Table ...............................................................................................................................23-2

Chapter 24 ARP Table .................................................................................................................... 24-1

24.1 Introduction to ARP Table ...................................................................................................................... 24-1

24.2 Viewing ARP Table ................................................................................................................................24-1

Part VII: .................................................................................................................................................... VII

Chapter 25 Introduction to CLI........................................................................................................ 25-1

25.1 Command Line Interface Overview ........................................................................................................25-1

25.2 Command Summary................................................................................................................................25-2

Chapter 26 Command Examples.................................................................................................... 26-1

26.1 Commonly Used Commands Overview.................................................................................................. 26-1

26.2 sys Commands......................................................................................................................................... 26-1

26.3 sys cluster Commands .............................................................................................................................26-3

26.4 ip Commands........................................................................................................................................... 26-5

26.5 Enabling rstp on the Gigabit Ports...........................................................................................................26-6

Chapter 27 IEEE 802.1Q Tagged VLAN Commands...................................................................... 27-1

27.1 IEEE 802.1Q Tagged VLAN Overview.................................................................................................. 27-1

27.2 Filtering Databases ..................................................................................................................................27-1

27.3 Configuring Tagged VLAN ....................................................................................................................27-1

27.4 IEEE VLAN1Q Tagged VLAN Configuration Commands....................................................................27-3

27.5 vlan1q svlan active ..................................................................................................................................27-8

27.6 vlan1q svlan inactive ............................................................................................................................... 27-8

27.7 vlan1q svlan list....................................................................................................................................... 27-8

27.8 vlan1q vlan list ........................................................................................................................................27-9

Part VIII: .................................................................................................................................................. VIII

x Table of Contents

Dimension GS-2024 Gigabit Ethernet Switch

Appendix A Product Specifications.......................................................................................................A-1

Appendix B Index.................................................................................................................................B-1

Table of Contents xi

Dimension GS-2024 Gigabit Ethernet Switch

List of Figures

Figure 1-1 Backbone Application............................................................................................................. 1-4

Figure 1-2 Bridging Application................................................................................................................ 1-5

Figure 1-3 High Performance Switched Workgroup Application .............................................................. 1-6

Figure 1-4 VLAN Workgroup Application ................................................................................................. 1-7

Figure 1-5 Shared Server Using VLAN Example.....................................................................................1-7

Figure 2-1 Attaching Rubber Feet............................................................................................................ 2-1

Figure 2-2 Attaching Mounting Brackets and Screws .............................................................................. 2-2

Figure 2-3 Mounting the switch to an EIA standard 19-inch rack.............................................................2-2

Figure 3-1 GS-2024 Front Panel ............................................................................................................ 3-1

Figure 3-2 Transceiver Installation Example............................................................................................ 3-3

Figure 3-3 Installed Transceiver .............................................................................................................. 3-3

Figure 3-4 Opening the Transceiver’s Latch Example............................................................................. 3-4

Figure 3-5 Transceiver Removal Example............................................................................................... 3-4

Figure 3-6 GS-2024 Rear Panel .............................................................................................................. 3-4

Figure 3-7 Front Panel LEDs................................................................................................................... 3-5

Figure 4-1 Web Configurator: login.......................................................................................................... 4-1

Figure 4-2 Web Configurator Home Screen (Status)............................................................................... 4-2

Figure 4-3 Web Configurator: Change Password at Login ...................................................................... 4-6

Figure 4-4 Resetting the Switch: Via Console Port.................................................................................. 4-7

Figure 4-5 Web Configurator: Logout Screen.......................................................................................... 4-7

Figure 5-1 Status ..................................................................................................................................... 5-1

Figure 5-2 Status: Port Details................................................................................................................. 5-3

Figure 6-1 System Info ............................................................................................................................ 6-1

Figure 6-2 General Setup ........................................................................................................................ 6-3

Figure 6-3 Switch Setup .......................................................................................................................... 6-5

Figure 6-4 IP Setup.................................................................................................................................. 6-7

Figure 6-5 Port Setup .............................................................................................................................. 6-9

Figure 7-1 Selecting a VLAN Type .......................................................................................................... 7-3

Figure 7-2 802.1Q VLAN Status .............................................................................................................. 7-3

Figure 7-3 802.1Q VLAN Port Settings.................................................................................................... 7-4

List of Figures xiii

Dimension GS-2024 Gigabit Ethernet Switch

Figure 7-4 802.1Q Static VLAN ............................................................................................................... 7-6

Figure 7-5 Static VLAN: Summary Table ................................................................................................. 7-7

Figure 7-6 VID1 Example Screen............................................................................................................ 7-8

Figure 7-7 Port Based VLAN Setup (All Connected)............................................................................... 7-9

Figure 7-8 Port Based VLAN Setup (Port isolation) .............................................................................. 7-10

Figure 8-1 Static MAC Forwarding .......................................................................................................... 8-1

Figure 8-2 Static MAC Forwarding: Summary Table ............................................................................... 8-2

Figure 9-1 Spanning Tree Protocol: Status.............................................................................................. 9-3

Figure 9-2 Spanning Tree Protocol: Configuration .................................................................................. 9-4

Figure 10-1 Bandwidth Control.............................................................................................................. 10-1

Figure 11-1 Broadcast Storm Control .....................................................................................................11-1

Figure 12-1 Mirroring............................................................................................................................. 12-1

Figure 13-1 Aggregation ID ................................................................................................................... 13-2

Figure 13-2 Link Aggregation: Link Aggregation Protocol Status .......................................................... 13-2

Figure 13-3 Link Aggregation: Configuration......................................................................................... 13-4

Figure 14-1 RADIUS Server.................................................................................................................. 14-1

Figure 14-2 Port Authentication............................................................................................................. 14-1

Figure 14-3 Port Authentication: RADIUS ............................................................................................. 14-2

Figure 14-4 Port Authentication: 802.1x ................................................................................................ 14-3

Figure 15-1 Port Security ...................................................................................................................... 15-1

Figure 16-1 Access Control ................................................................................................................... 16-1

Figure 16-2 Console Port Priority .......................................................................................................... 16-1

Figure 16-3 SNMP Management Model................................................................................................ 16-2

Figure 16-4 Access Control: SNMP....................................................................................................... 16-4

Figure 16-5 Access Control: Logins ...................................................................................................... 16-5

Figure 16-6 Access Control: Service Access Control ............................................................................ 16-6

Figure 16-7 Access Control: Remote Management .............................................................................. 16-7

Figure 17-1 DiffServ: Differentiated Service Field ................................................................................. 17-1

Figure 17-2 DiffServ Network Example ................................................................................................. 17-2

Figure 17-3 DiffServ: DSCP Setting ...................................................................................................... 17-2

Figure 18-1 Queuing Method ................................................................................................................ 18-2

Figure 19-1 Static Routing..................................................................................................................... 19-1

xiv List of Figures

Dimension GS-2024 Gigabit Ethernet Switch

Figure 19-2 Static Routing: Summary Table .......................................................................................... 19-2

Figure 20-1 Maintenance....................................................................................................................... 20-1

Figure 20-2 Firmware Upgrade.............................................................................................................. 20-1

Figure 20-3 Restore Configuration ........................................................................................................ 20-2

Figure 20-4 Backup Configuration......................................................................................................... 20-2

Figure 20-5 Confirm Load factory Defaults............................................................................................ 20-3

Figure 20-6 Restart Switch After Load Factory Defaults........................................................................ 20-3

Figure 20-7 Confirm Restart The Switch ............................................................................................... 20-3

Figure 21-1 Diagnostic...........................................................................................................................21-1

Figure 22-1 Clustering Application Example.......................................................................................... 22-1

Figure 22-2 Cluster Management Status ............................................................................................... 22-2

Figure 22-3 Cluster Member Web Configuration Screen Example........................................................ 22-3

Figure 22-4 Example: Uploading Firmware to a Cluster Member Switch .............................................. 22-4

Figure 22-5 Configuring Cluster Management....................................................................................... 22-5

Figure 23-1 MAC Table Flowchart ......................................................................................................... 23-1

Figure 23-2 MAC Table.......................................................................................................................... 23-2

Figure 24-1 ARP Table........................................................................................................................... 24-2

Figure 25-1 CLI Help: Sample Output ................................................................................................... 25-2

Figure 26-1 sys log disp Command Example ........................................................................................ 26-1

Figure 26-2 sys version Command Example......................................................................................... 26-2

Figure 26-3 sys sw vlan1q vlan list Command Example .......................................................................26-2

Figure 26-4 sys sw pktcnt Command Example .....................................................................................26-3

Figure 26-5 sys sw mac list Command Example................................................................................... 26-3

Figure 26-6 sys cluster status Command Example ............................................................................... 26-4

Figure 26-7 sys cluster showMember Command Example ................................................................... 26-4

Figure 26-8 sys cluster status Command Example ............................................................................... 26-5

Figure 26-9 IP SET Command Example ............................................................................................... 26-5

Figure 26-10 IP PING Command Example............................................................................................ 26-5

Figure 26-11 ip route status Command Example .................................................................................. 26-6

Figure 26-12 ip arp status Command Example ..................................................................................... 26-6

Figure 26-13 ip dhcp Command Examples ...........................................................................................26-6

Figure 27-1 Tagged VLAN Configuration and Activation Example ........................................................ 27-2

List of Figures xv

Dimension GS-2024 Gigabit Ethernet Switch

Figure 27-2 CPU VLAN Configuration and Activation Example ............................................................ 27-2

Figure 27-3 Deleting Default VLAN Example ........................................................................................ 27-3

Figure 27-4 GARP STATUS Command Example.................................................................................. 27-3

Figure 27-5 garp timer Command Example .......................................................................................... 27-4

Figure 27-6 garp status Command Example......................................................................................... 27-4

Figure 27-7 vlan1q port status Command Example .............................................................................. 27-5

Figure 27-8 vlan1q port default vid Command Example ....................................................................... 27-5

Figure 27-9 vlan1q port accept Command Example ............................................................................. 27-6

Figure 27-10 vlan1q port gvrp Command Example............................................................................... 27-6

Figure 27-11 vlan1q svlan cpu Command Example .............................................................................. 27-6

Figure 27-12 Modifying the Static VLAN Example................................................................................. 27-7

Figure 27-13 vlan1q svlan delentry Command Example....................................................................... 27-8

Figure 27-14 vlan1q svlan list Command Example ............................................................................... 27-9

Figure 27-15 vlan1q svlan list Command Example ............................................................................... 27-9

Figure 27-16 vlan1q vlan status Command Example.......................................................................... 27-10

xvi List of Figures

Dimension GS-2024 Gigabit Ethernet Switch

List of Tables

Table 3-1 GS-2024: Front Panel .............................................................................................................. 3-1

Table 3-2 Front Panel LED Descriptions.................................................................................................. 3-5

Table 4-1 Navigation Panel Sub-links Overview ...................................................................................... 4-3

Table 4-2 Web Configurator Screen Sub-links Details.............................................................................4-3

Table 4-3 Navigation Panel Sub-link Descriptions ................................................................................... 4-4

Table 5-1 Status....................................................................................................................................... 5-2

Table 5-2 Status: Port Details .................................................................................................................. 5-3

Table 6-1 System Info .............................................................................................................................. 6-2

Table 6-2 General Setup.......................................................................................................................... 6-3

Table 6-3 Switch Setup ............................................................................................................................ 6-6

Table 6-4 IP Setup ................................................................................................................................... 6-8

Table 6-5 Port Setup ................................................................................................................................ 6-9

Table 7-1 GARP Terminology .................................................................................................................. 7-2

Table 7-2 802.1Q VLAN Status................................................................................................................ 7-3

Table 7-3 802.1Q VLAN Port Settings ..................................................................................................... 7-5

Table 7-4 802.1Q Static VLAN................................................................................................................. 7-6

Table 7-5 Static VLAN: Summary Table................................................................................................... 7-7

Table 7-6 Port Based VLAN Setup ........................................................................................................7-10

Table 8-1 Static MAC Forwarding ............................................................................................................ 8-1

Table 8-2 Static MAC Forwarding: Summary Table ................................................................................. 8-2

Table 9-1 STP Path Costs .......................................................................................................................9-1

Table 9-2 STP Port States .......................................................................................................................9-2

Table 9-3 Spanning Tree Protocol: Status................................................................................................9-3

Table 9-4 Spanning Tree Protocol: Configuration .................................................................................... 9-5

Table 10-1 Bandwidth Control................................................................................................................ 10-2

Table 11-1 Broadcast Storm Control ...................................................................................................... 11-2

Table 12-1 Mirroring............................................................................................................................... 12-1

Table 13-1 Link Aggregation: Link Aggregation Protocol Status ............................................................ 13-3

Table 13-2 Link Aggregation: Configuration........................................................................................... 13-4

Table 14-1 Port Authentication: RADIUS ............................................................................................... 14-2

List of Tables xvii

Dimension GS-2024 Gigabit Ethernet Switch

Table 14-2 Port Authentication: 802.1x.................................................................................................. 14-3

Table 15-1 Port Security ........................................................................................................................ 15-1

Table 16-1 Access Control Summary .................................................................................................... 16-1

Table 16-2 SNMP Commands ............................................................................................................... 16-3

Table 16-3 SNMP Traps ........................................................................................................................ 16-3

Table 16-4 Access Control: SNMP ........................................................................................................ 16-4

Table 16-5 Access Control: Logins........................................................................................................ 16-5

Table 16-6 Access Control: Service Access Control.............................................................................. 16-6

Table 16-7 Access Control: Remote Management ................................................................................ 16-7

Table 17-1 Default DSCP-IEEE802.1p Mapping ................................................................................... 17-2

Table 17-2 DiffServ: DSCP Setting........................................................................................................ 17-2

Table 18-1 Physical Queue Priority ....................................................................................................... 18-1

Table 18-2 Queuing Method .................................................................................................................. 18-2

Table 19-1 Static Routing ...................................................................................................................... 19-1

Table 19-2 Static Routing: Summary Table............................................................................................ 19-2

Table 20-1 Filename Conventions......................................................................................................... 20-4

Table 20-2 General Commands for GUI-based FTP Clients ................................................................. 20-5

Table 21-1 Diagnostic............................................................................................................................ 21-1

Table 22-1 ZyXEL Clustering Management Specifications.................................................................... 22-1

Table 22-2 Cluster Management Status ................................................................................................ 22-2

Table 22-3 FTP Upload to Cluster member Example ............................................................................ 22-4

Table 22-4 Configuring Cluster Management ........................................................................................ 22-5

Table 23-1 MAC Table ........................................................................................................................... 23-2

Table 24-1 ARP Table ............................................................................................................................ 24-2

Table 25-1 Command Summary: sys .................................................................................................... 25-2

Table 25-2 Command Summary: sys sw............................................................................................... 25-6

Table 25-3 CLI Command Summary: exit ........................................................................................... 25-12

Table 25-5 Command Summary : ether .............................................................................................. 25-13

Table 25-5 Command Summary: config .............................................................................................. 25-13

Table 25-4 Command Summary: ip ..................................................................................................... 25-13

xviii List of Tables

Dimension GS-2024 Gigabit Ethernet Switch

Preface

Congratulations on your purchase from the Dimension series of switches.

This preface introduces you to the GS-2024 and discusses the conventions of this User’s Guide. It also provides
information on other related documentation.

About the GS-2024

The GS-2024 Gigabit Ethernet Switch is a managed switch with features ideally suited in an enterprise
environment. It can deliver broadband IP services to:

 Multi-tenant unit (MTU) buildings (hotels, motels, resorts, residential multi-dwelling units, office

buildings, educational establishments, etc.)

 Public facilities (convention centers, airports, plazas, train stations, etc.)

 Enterprises.

It can also be deployed as a mini-POP (point-of-presence) in a building basement delivering 10/100/1000Mbps data
service over Category 5 wiring to each customer.

General Syntax Conventions

 This guide shows you how to configure the switch using the web configurator and CLI commands. See the

online HTML help for information on individual web configurator screens.

 Mouse action sequences are denoted using a comma. For example, click Start, Settings, Control Panel,

Network means first you click Start, click or move the mouse pointer over Settings, then click or move
the mouse pointer over Control Panel and finally click (or double-click) Network.

 “Enter” means for you to type one or more characters. “Select” or “Choose” means for you to use one of

the predefined choices.

 Predefined choices are in Bold Arial font.

 Button and field labels, links and screen names in are in Bold Times New Roman font.

 For brevity’s sake, we will use “e.g.” as shorthand for “for instance”, and “i.e.” as shorthand for “that is” or

“in other words” throughout this manual.

 The ZyXEL Dimension GS-2024 Gigabit Ethernet Switch will be referred to as the “GS-2024”, the “GS”

or, simply, as “the switch” in this User’s Guide.

Preface xix

Dimension GS-2024 Gigabit Ethernet Switch

Graphics Icons Key

The GS Switch Server

Computer Printer Gateway

Related Documentation

Web Configurator Online HTML help

The online HTML help shows you how to use the web configurator to configure individual screens. More
background information can be found in this UG.

ZyXEL Web Site

The ZyXEL download library at www.zyxel.com contains additional support documentation as well as an online
glossary of networking terms.

User Guide Feedback

Help us help you. E-mail all User Guide-related comments, questions or suggestions for improvement to

[e-mail]

Innovation Road II, Science-Based Industrial Park, Hsinchu, 300, Taiwan. Thank you.

xx Preface

or send regular mail to The Technical Writing Team, ZyXEL Communications Corp., 6

Features and Applications

Part I:

Features and Applications

This part acquaints you with the features and applications of the GS-2024.

I

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 1

Getting to Know the GS-2024

This chapter describes the key features, benefits and applications of the GS-2024.

1.1 Introduction

The GS-2024 is a layer 2 stand-alone Gigabit Ethernet switch with 24 100/1000Mbps ports, two mini GBIC slots
for optical uplinking and one console port and RJ-45 port for local management.

With its built-in web configurator, managing and configuring the switch is easy. From cabinet management to port­level control and monitoring, you can visually configure and manage your network via the web browser. Just click
your mouse instead of typing cryptic command strings. In addition, the switch can also be managed via Telnet, the
console port, or third-party SNMP management.

TM

The GS-2024 also supports iStacking

technology, allowing management of 24 switches with one IP address.

1.2 Features

The next two sections describe the hardware and firmware features of the GS-2024.

1.2.1 Hardware Features

Power

The GS-2024 requires 100~240VAC/1.5A power.

24 100/1000 Mbps Gigabit Ports (with two paired with the mini GBIC ports)

Connect up to 24 computers or switches directly to the 100/1000Mbps auto-negotiating, automatic cable sensing
(auto MDI/MDIX) Gigabit ports. All ports support:

 IEEE 802.3/3u/3ab standards

 Back pressure flow control in half duplex mode

 IEEE 802.3x flow control in full duplex mode

Two Mini GBIC Slots

These are slots for mini GBIC (Gigabit Interface Converter) transceiver. These allow the GS-2024 to connect to
another WAN switch or daisy-chain to other switches.

Console Port

Use the console port for local management of the switch.

One Management Port

Use the RJ-45 management port for switch management only. The management port is out-of-band, meaning that it
does not carry switch traffic.

Getting to Know the GS-2024 1-1

Dimension GS-2024 Gigabit Ethernet Switch

Fans

The two fans cool the GS-2024 sufficiently to allow reliable operation of the switch in even poorly ventilated
rooms or basements.

1.2.2 Firmware Features

IP Protocols

 IP Host (No routing)

 Telnet for configuration and monitoring

 SNMP for management

o SNMP MIB II (RFC 1213)

o Ethernet MIBs RFC 1643

o Bridge MIBs RFC 1493

o SMI RFC 1155

o RMON RFC 1757

o SNMPv2 or SNMPv2c

o Bridge extension MIBs RFC 2674

Management

 Web configurator

 Command-line interface locally via console port or remotely via Telnet

 Out-of-band RJ-45 management port

 SNMP

System Monitoring

 System status (link status, rates, statistics counters)

 SNMP

 Temperatures, voltage, fan speed reports and alarms

 Port Mirroring allows you to analyze one port’s traffic from another. This mechanism helps to track

network errors or abnormal packet transmission without interrupting the flow of data.

Security

 System management password protection  Port-based VLAN

 IEEE 802.1Q VLAN  802.1x Authentication

 Static MAC address

Port Link Aggregation

The GS-2024 adheres to the 802.3ad standard for static and dynamic port link aggregation.

1-2 Getting to Know the GS-2024

Dimension GS-2024 Gigabit Ethernet Switch

Bandwidth Control

 The GS-2024 supports rate limiting allowing you to create different service plans.

 The GS-2024 supports IGMP snooping enabling group multicast traffic to be only forwarded to ports that

are members of that group; thus allowing you to significantly reduce multicast traffic passing through your
switch.

 Broadcast storm control.

Quality of Service (QoS)

 Four priority queues so you can ensure mission-critical data is delivered on time.

 Follows the IEEE 802.1p priority setting standard.

STP (Spanning Tree Protocol) / RSTP (Rapid STP)

(R)STP detects and breaks network loops and provides backup links between switches, bridges or routers. It allows
a switch to interact with other (R)STP -compliant switches in your network to ensure that only one path exists
between any two stations on the network.

iStacking

ZyXEL iStacking™ allows an administrator to remotely manage multiple switches located in different areas. The
administrator can configure, monitor, troubleshoot and manage up to 24 switches at once with only one single IP,
regardless of the physical location. The switches must be directly connected and be in the same VLAN group so as
to be able to communicate with one another.

TM

1.3 Applications

This section shows a few examples of using the GS-2024 in various network environments.

1.3.1 Backbone Application

In this application, the switch is an ideal solution for small networks where rapid growth can be expected in the
near future.

The switch can be used standalone for a group of heavy traffic users. You can connect computers directly to the
switch’s ports or connect other switches to the GS-2024.

In this example, all computers connected directly or indirectly to the GS-2024 can share super high-speed
applications on the Gigabit server.

To expand the network, simply add more networking devices such as switches, routers, firewalls, print servers etc.

Getting to Know the GS-2024 1-3

Dimension GS-2024 Gigabit Ethernet Switch

Figure 1-1 Backbone Application

1.3.2 Bridging Example

In this example application the switch is the ideal solution for different company departments to connect to the
corporate backbone. It can alleviate bandwidth contention and eliminate server and network bottlenecks. All users
that need high bandwidth can connect to high-speed department servers via the switch. You can provide a super­fast uplink connection by installing the transceiver(s) in the mini GBIC slots on the GS-2024.

Moreover, the switch eases supervision and maintenance by allowing network managers to centralize multiple
servers at a single location.

1-4 Getting to Know the GS-2024

Dimension GS-2024 Gigabit Ethernet Switch

Figure 1-2 Bridging Application

Full-duplex mode operation only applies to point-to-point access (for example, when attaching the switch to a
workstation, server, or another switch). When connecting to hubs, use a standard cascaded connection set at half­duplex operation.

1.3.3 High Performance Switched Workgroup Example

The switch is ideal for connecting two power workgroups that need high bandwidth. In the following example, use
trunking to connect these two power workgroups.

Switching to higher-speed LANs such as FDDI or ATM is not feasible for most people due to the expense of
replacing all existing Ethernet cables and adapter cards, restructuring your network and complex maintenance.

The GS-2024 can provide the same bandwidth as FDDI and ATM at much lower cost while still being able to use
existing adapters and switches. Moreover, the current LAN structure can be retained as all ports can freely
communicate with each other.

Getting to Know the GS-2024 1-5

Dimension GS-2024 Gigabit Ethernet Switch

Figure 1-3 High Performance Switched Workgroup Application

1.3.4 IEEE 802.1Q VLAN Application Examples

This section shows a workgroup and a shared server example using 802.1Q tagged VLANs. For more information
on VLANs, see the Switch Setup section and the VLAN Setup chapter in this User’s Guide. A VLAN (Virtual Local
Area Network) allows a physical network to be partitioned into multiple logical networks. Stations on a logical
network belong to one group. A station can belong to more than one group. With VLAN, a station cannot directly
talk to or hear from stations that are not in the same group(s) unless such traffic first goes through a router.

Tag-based VLAN Workgroup Example

Ports in the same VLAN group share the same broadcast domain thus increase network performance through
reduced broadcast traffic. VLAN groups can be modified at any time by adding, moving or changing ports without
any re-cabling.

1-6 Getting to Know the GS-2024

Dimension GS-2024 Gigabit Ethernet Switch

Figure 1-4 VLAN Workgroup Application

VLAN Shared Server Example

Shared resources such as a server can be used by all ports in the same VLAN as the server, as shown in the
following example. In this example, only ports that need access to the server need belong to VLAN 3 while they
can belong to other VLAN groups too.

Figure 1-5 Shared Server Using VLAN Example

Getting to Know the GS-2024 1-7

Hardware Installation and Connections

Part II:

Hardware Installation and Connections

This part acquaints you with installation scenarios of the GS-2024, instructs you on how to make

the hardware connections and explains the front panel LEDs.

II

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 2

Hardware Installation

This chapter shows two switch installation scenarios.

2.1 Installation Scenarios

The switch can be placed on a desktop or rack-mounted on a standard EIA rack. Use the rubber feet in a desktop
installation and the brackets in a rack-mounted installation.

For proper ventilation, allow at least 4 inches (10 cm) of clearance at the front and 3.4 inches (8

cm) at the back of the switch. This is especially important for enclosed rack installations.

2.1.1 Desktop Installation Procedure

1. Make sure the switch is clean and dry.

2. Set the switch on a smooth, level surface strong enough to support the weight of the switch and the

connected cables. Make sure there is a power outlet nearby.

3. Make sure there is enough clearance around the switch to allow air circulation and the attachment of cables

and the power cord.

4. Remove the adhesive backing from the rubber feet.

5. Attach the rubber feet to each corner on the bottom of the switch. These rubber feet help protect the switch

from shock or vibration and ensure space between switches when stacking.

Figure 2-1 Attaching Rubber Feet

Do not block the ventilation holes. Leave space between switches when stacking.

2.1.2 Rack-Mounted Installation

The switch can be mounted on an EIA standard size, 19-inch rack or in a wiring closet with other equipment.
Follow the steps below to mount your switch on a standard EIA rack using a rack-mounting kit.

Hardware Installation 2-1

Dimension GS-2024 Gigabit Ethernet Switch

1. Align one bracket with the holes on one side of the switch and secure it with the bracket screws smaller

than the rack-mounting screws.

2. Attach the other bracket in a similar fashion.

Figure 2-2 Attaching Mounting Brackets and Screws

3. After attaching both mounting brackets, position the switch in the rack by lining up the holes in the
brackets with the appropriate holes on the rack. Secure the switch to the rack with the rack-mounting
screws.

Figure 2-3 Mounting the switch to an EIA standard 19-inch rack

2-2 Hardware Installation

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 3

Hardware Connections

This chapter acquaints you with the front and rear panels, shows you how to make the connections,

install/remove (optional) modules and explains the LEDs.

3.1 Safety Warnings

 The length of exposed (bare) power wire should not exceed 7mm.

 Do not use this product near water, for example, in a wet basement.
 Only a qualified technician should service or disassemble this device.

3.2 Front Panel

The following figure shows the front panel of the GS-2024. The front panel contains the switch LEDs, 24 RJ-45
gigabit ports, two mini GBIC ports and a console and management port for local management.

LEDs

Ethernet Ports Mini GBIC Ports

Console Port

Figure 3-1 GS-2024 Front Panel

Table 3-1 GS-2024 Front Panel

CONNECTOR DESCRIPTION

24 100/1000 Mbps
RJ-45 Ethernet Ports

Mini GBIC Ports Use mini GBIC transceivers in these slots for fiber-optical connections to backbone

Console Port The console port is for local configuration of the GS-2024.

Management Port Connect to a computer using an RJ-45 Ethernet cable for local configuration of the GS-

Connect these 1Gbps Electrical Ethernet ports to high-bandwidth backbone network
Ethernet switches or use them to daisy-chain other switches.

Ethernet switches.

2024.

Management Port

3.2.1 Console Port

For local management, you can use a computer with terminal emulation software configured to the following
parameters:

♦ VT100 terminal emulation ♦ 9600 bps

♦ No parity, 8 data bits, 1 stop bit ♦ No flow control

Connect the male 9-pin end of the console cable to the console port of the GS-2024 switch. Connect the female end
to a serial port (COM1, COM2 or other COM port) of your computer.

Hardware Installation 3-1

Dimension GS-2024 Gigabit Ethernet Switch

3.2.2 Gigabit Ports

The GS-2024 has 100/1000Mbps auto-negotiating, auto-crossover Gigabit ports. The speed of the Gigabit ports
can be 100Mbps or 1000Mbps and the duplex mode can be half duplex (for 100 Mbps) or full duplex.

When auto-negotiation is turned on, a Gigabit port on the GS-2024 negotiates with the peer automatically to
determine the connection speed and duplex mode. If the peer Ethernet port does not support auto-negotiation or
turns off this feature, the GS-2024 determines the connection speed by detecting the signal on the cable. When the
GS-2024’s auto-negotiation is turned off, a Gigabit port uses the pre-configured speed and duplex mode when
making a connection, thus requiring you to make sure that the settings of the peer Ethernet port are the same in
order to connect.

Two Gigabit ports are paired with the two mini GBIC slots. The switch uses up to one connection for each pair for
a total of two possible Gigabit connections (one from each of the two pairs). The mini GBIC ports have priority
over the Gigabit ports. This means that if a mini GBIC port and the corresponding Gigabit port are connected at the
same time, the Gigabit port will be disabled.

Default Ethernet Negotiation Settings

The factory default negotiation settings for the Gigabit ports on the GS-2024 are:

• Speed: Auto • Duplex: Auto

• Flow control: Off • Link Aggregation: Disabled

Auto-crossover

All ports are auto-crossover, that is auto MDI/MDIX ports (Media Dependent Interface Crossover), so you may use
either a straight-through Ethernet cable or crossover Ethernet cable for all Gigabit port connections. Auto-crossover
ports automatically sense whether they need to function as crossover or straight ports, so crossover cables can
connect both computers and switches/hubs.

3.2.3 Mini GBIC Slots

These are slots for mini GBIC (Gigabit Interface Converter) transceiver. A transceiver is a single unit that houses a
transmitter and a receiver. The GS-2024 does not come with transceivers. You must use transceivers that comply
with the Small Form-factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA). See the SFF committee’s
INF-8074i specification Rev 1.0 for details.

You can change transceivers while the switch is operating. You can use different transceivers to connect to Ethernet
switches with different types of fiber-optic connectors.

To avoid possible eye injury, do not look into an operating fiber-optic module’s connectors.

 Type: SFP connection interface
 Connection speed: 1 Gigabit per second (Gbps)

Transceiver Installation

Use the following steps to install a mini GBIC transceiver (SFP module).

1. Insert the transceiver into the slot with the exposed section of PCB board facing down.

2. Press the transceiver firmly until it clicks into place.

3. The switch automatically detects the installed transceiver. Check the LEDs to verify that it is functioning

properly.

3-2 Hardware Installation

Dimension GS-2024 Gigabit Ethernet Switch

Figure 3-2 Transceiver Installation Example

Figure 3-3 Installed Transceiver

Transceiver Removal

Use the following steps to remove a mini GBIC transceiver (SFP module).

1. Open the transceiver’s latch (latch styles vary).

2. Pull the transceiver out of the slot.

Hardware Installation 3-3

Dimension GS-2024 Gigabit Ethernet Switch

Figure 3-4 Opening the Transceiver’s Latch Example

Figure 3-5 Transceiver Removal Example

3.2.4 Management Port

The MGMT (management) port is used for local management. The port is not used for network data transmission
meaning that it is out-of-band. Connect directly to this port using an Ethernet cable. You can configure the switch
via Telnet or the web configurator.

The default IP address of the management port is 192.168.0.1 with a subnet mask of 255.255.255.0.

3.3 Rear Panel

The following figure shows the rear panel of the GS-2024. The rear panel contains the power receptacle.

Figure 3-6 GS-2024 Rear Panel

3-4 Hardware Installation

Dimension GS-2024 Gigabit Ethernet Switch

3.3.1 Power Connector

Make sure you are using the correct power source as shown on the panel.

To connect the power to the GS-2024 unit, insert the female end of power cord to the power receptacle on the rear
panel. Connect the other end of the supplied power cord to a 100~240VAC/1.5A power outlet. Make sure that no
objects obstruct the airflow of the fans (located on the side of the unit).

3.4 Front Panel LEDs

After you connect the power to the switch, view the LEDs to ensure proper functioning of the switch and as an aid
in troubleshooting.

Figure 3-7 Front Panel LEDs

The following table describes the Ethernet port LEDs.

Table 3-2 Front Panel LED Descriptions

LED COLOR STATUS DESCRIPTION

PWR Green On

Off

SYS Green Blinking

On
Off

ALM Red On

Off

LNK/ACT

(Gigabit ports)

Amber Blinking

Green Blinking

On
Off

On
Off

The system is turned on.
The system is off.

The system is rebooting and performing self-diagnostic tests.
The system is on and functioning properly.
The power is off or the system is not ready/malfunctioning.

There is a hardware failure.
The system is functioning normally.

The system is transmitting/receiving to/from an Ethernet network.
The link to a 1000 Mbps Ethernet network is up.
The link to an Ethernet network is down.

The system is transmitting/receiving to/from an Ethernet network.
The link to a 100 Mbps Ethernet network is up.
The link to an Ethernet network is down.

Amber

(Gigabit ports)

GBIC Slots

LNK Green On The link to this port is up.

On The Gigabit port is negotiating in full-duplex mode. FDX

Off The Gigabit port is negotiating in half-duplex mode and no collisions are

occurring.

Hardware Installation 3-5

Dimension GS-2024 Gigabit Ethernet Switch

Table 3-2 Front Panel LED Descriptions

LED COLOR STATUS DESCRIPTION

Off The link to this port is not connected.

ACT Green Blinking This port is receiving or transmitting data.

MGMT

10 Green Blinking The system is transmitting/receiving to/from an Ethernet device.

On The port is connected at 10Mbps.

Off The port is not connected at 10Mbps or to an Ethernet device.

100 Amber Blinking The system is transmitting/receiving to/from an Ethernet device.

On The port is connected at 100Mbps.

Off The port is not connected at 100Mbps or to an Ethernet device.

3.5 Configuring the GS-2024

You may use the embedded web configurator or command line interface to configure the GS-2024. If you’re using
the web configurator, you need Internet Explorer 5.5 and later or Netscape Navigator 6 and later.

You can access the command line interface using a terminal emulation program on a computer connected to the
switch console port (see Section 3.2.1) or access the switch using Telnet.

You can use the “config save” command to save 802.1Q, STP, Cluster and IP configuration

changes to non-volatile memory (Flash). These changes are effective after you restart the switch.

However you cannot use “config save” for all other line command configurations. These are

saved in volatile memory (DRAM), so are not effective after you restart the switch.

The next part of this guide discusses configuring the GS-2024 using the web configurator.

3-6 Hardware Installation

Getting Started

Part III:

Getting Started

This part introduces you to the GS-2024 web configurator, describes the Status and Port

Details screens and shows you how to configure the Basic Setting screens.

III

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 4

Introducing

This section introduces the configuration and functions of the Web Configurator.

the Web Configurator

4.1 Introduction

The embedded web configurator allows you to manage the switch from anywhere through a standard browser
such as Microsoft Internet Explorer or Netscape Navigator.

Use Internet Explorer 5.5 and later or Netscape Navigator 6 and later versions.

4.2 System Login

Step 1. Start your Internet Explorer or Netscape Navigator web browser.

Step 2.

Type “http://” and the IP address of the switch (for example, the default is 192.168.1.1) in the Location or
Address field. Press Enter.

The default IP address of the switch using the MGMT port is 192.168.0.1.

The default IP address of the switch using a Gigabit port is 192.168.1.1.

Step 3. The login screen appears. The default username is admin and the associated default password is 1234.

The date and time display as shown if you have not configured a time server nor manually entered a time
and date in the General Setup screen.

Figure 4-1 Web Configurator: login

Step 4. Click OK to view the first web configurator screen.

4.3 Status Screen

Introducing the Web Configurator 4-1

Dimension GS-2024 Gigabit Ethernet Switch

The Status screen is the first web configurator screen you see after you log in. The following figure shows the
navigating components of a web configurator screen.

Click Status to view

current device statistics.

Navigation Panel.

Click on a tab to

display related links.

Click Logout to exit

the web configurator.

Figure 4-2 Web Configurator Home Screen (Status)

Click here for help on

configuring a screen.

In the navigation panel, click a main link to reveal a list of submenu links.

4-2 Introducing the Web Configurator

Dimension GS-2024 Gigabit Ethernet Switch

Table 4-1 Navigation Panel Sub-links Overview

BASIC SETTING ADVANCED APPLICATION ROUTING PROTOCOL MANAGEMENT

The following table lists the various web configurator screens within the sub-links.

Table 4-2 Web Configurator Screen Sub-links Details

BASIC SETTING ADVANCED

APPLICATIONS

ROUTING PROTOCOL MANAGEMENT

System Info

General Setup

Switch Setup

IP Setup

Port Setup

VLAN Status

VLAN Port Setting

Static VLAN

Static MAC Forwarding

Spanning Tree Protocol

Spanning Tree Protocol

Configuration

Bandwidth Control

Broadcast Storm Control

Mirroring

Link Aggregation

Link Aggregation

Configuration

Port Authentication

RADIUS

Status

Status

Static Routing

Maintenance

Firmware Upgrade

Restore Configuration

Backup Configuration

Load Factory Default

Reboot System

Diagnostic

Cluster Management

Status

Cluster Management

Configuration

MAC Table

ARP Table

Introducing the Web Configurator 4-3

Dimension GS-2024 Gigabit Ethernet Switch

Table 4-2 Web Configurator Screen Sub-links Details

BASIC SETTING ADVANCED

APPLICATIONS

802.1x

Port Security

Access Control

SNMP

Logins

Service Access Control

Remote Management

DiffServ

Queuing Method

ROUTING PROTOCOL MANAGEMENT

The following table summarizes these sub-links in the navigation panel.

Table 4-3 Navigation Panel Sub-link Descriptions

LABEL DESCRIPTION

Basic Setting Screens

System Info This link takes you to a screen that displays general system and hardware monitoring

information.

General Setup This link takes you to a screen where you can configure general identification information

about the switch.

Switch Setup This link takes you to a screen where you can set up global switch parameters such as

VLAN type, MAC address learning, IGMP snooping, GARP and priority queues.

IP Setup This link takes you to a screen where you can configure the IP address, subnet mask

(necessary for switch management) and DNS (domain name server).

Port Setup This link takes you to screens where you can configure settings for individual switch ports.

Advanced Application

VLAN This link takes you to screens where you can configure port-based or 802.1Q VLAN

(depending on what you configured in the Switch Setup menu).

Static MAC
Forwarding

Filtering This link takes you to a screen to set up filtering rules.

Spanning Tree

Protocol

Bandwidth Control This link takes you to screens where you can cap the maximum incoming bandwidth

Broadcast Storm

Control

Mirroring This link takes you to screens where you can copy traffic from one port or ports to another

This link takes you to screens where you can configure static MAC addresses for a port.
These static MAC addresses do not age out.

This link takes you to screens where you can configure the STP to prevent network loops.

allowed on specified port(s).

This link takes you to a screen to set up broadcast filters.

port in order that you can examine the traffic from the first port without interference

Link Aggregation This link takes you to a screen where you can logically trunk physical links to form one

logical, higher-bandwidth link.

4-4 Introducing the Web Configurator

Dimension GS-2024 Gigabit Ethernet Switch

Table 4-3 Navigation Panel Sub-link Descriptions

LABEL DESCRIPTION

Port Authentication This link takes you to a screen where you can configure RADIUS (Remote Authentication

Dial-In User Service), a protocol for user authentication that allows you to use an external
server to validate an unlimited number of users.

Port Security This link takes you to a screen where you can activate maximum port security through the

use of configured static MAC addresses.

Access Control This link takes you to screens where you can change the system login password and

configure SNMP and remote management.

DiffServ This link takes you to screens where you can enable DiffServ and set DSCP-to-

IEEE802.1p mappings.

Queuing Method This link takes you to a screen where you can configure SPQ or WFQ with associated

queue weights.

Routing Protocol

Static Routing This link takes you to screens where you can configure static routes. A static route

defines how the GS-2024 should forward traffic by configuring the TCP/IP parameters
manually.

Management

Maintenance This link takes you to screens where you can perform firmware and configuration file

maintenance as well as reboot the system.

Diagnostic This link takes you to screens where you can view system logs and test port(s).

Cluster Management This link takes you to a screen where you can configure clustering management and view

its status.

MAC Table This link takes you to a screen where you can view the MAC addresses (and types) of

devices attached to what ports and VLAN IDs.

ARP Table This link takes you to a screen where you can view the MAC addresses – IP address

resolution table.

4.3.1 Change Your Password

After you log in for the first time, it is recommended you change the default Administrator password in the

Logins screen. Click Advanced Application, Access Control and then Logins to display the next screen.

Introducing the Web Configurator 4-5

Dimension GS-2024 Gigabit Ethernet Switch

Figure 4-3 Web Configurator: Change Password at Login

4.4 Switch Lockout

You are locked out from managing the switch if another administrator is currently logged in. You must wait until
he/she has logged out before you can log in.

Moreover, you could lock yourself (and all others) out from the switch by:

1. Deleting the management VLAN (default is VLAN 1).

2. Deleting all port-based VLANs with the CPU port as a member. The “CPU port” is the management port of

the switch.

3. Filtering all traffic to the CPU port.

4. Disabling all ports.

5. Assigning minimum bandwidth to the CPU port. If you limit bandwidth to the CPU port, you may find that

the switch performs sluggishly or not at all.

Be careful not to lock yourself and others out of the switch.

4.5 Resetting the Switch

If you lock yourself (and others) from the switch or forget the GS-2024 password, you will need to reload the
factory-default configuration file.

Uploading the factory-default configuration file replaces the current configuration file with the factory-default
configuration file. This means that you will lose all previous configurations and the speed of the console port will
be reset to the default of 9600bps with 8 data bit, no parity, one stop bit and flow control set to none. The

4-6 Introducing the Web Configurator

Dimension GS-2024 Gigabit Ethernet Switch

password will also be reset to “1234” and the IP address to 192.168.1.1 for the Gigabit ports and 192.168.0.1 for
the MGMT port.

To upload the configuration file, do the following:

Step 1. Connect to the console port using a computer with terminal emulation software. See the chapter on

hardware connections for details.

Step 2. Disconnect and reconnect the switch’s power to begin a session. When you reconnect the switch’s power,

you will see the initial screen.

Step 3. When you see the message “Press any key to enter Debug Mode within 3 seconds”

press any key to enter debug mode.

Step 4. Type atlc after the “Enter Debug Mode” message.

Step 5. Wait for the “Starting XMODEM upload” message before activating XMODEM upload on your

terminal.

Step 6. After a successful configuration file upload, type atgo to restart the switch.

GS-2024> sys romreset
Do you want to restore default ROM file(y/n)?y

Restore default Romfile.........................................................

..........OK

System Restart! (Console speed will be changed to 9600 bps)
GS-2024> û
Bootbase Version: V0.6 | 05/18/2004 15:28:28
RAM:Size = 32 Mbytes
FLASH: Intel 32M

ZyNOS Version: V3.50(LT.0)b4 | 07/02/2004 19:08:46

Press any key to enter debug mode within 3 seconds.

..........................

Enter Debug Mode

GS-2024> atlc

Starting XMODEM upload (CRC mode)....

CCCCCCCCCCCCCC
Total 393216 bytes received.

Erasing...

................................................................................

................

OK

GS-2024> atgo

Figure 4-4 Resetting the Switch: Via Console Port

The switch is now reinitialized with a default configuration file including the default password of “1234”.

4.5.1 Logging Out of the Web Configurator

Click Logout in a screen to exit the web configurator. You have to log in with your password again after you log
out. This is recommended after you finish a management session both for security reasons and so as you don’t
lock out other switch administrators.

Introducing the Web Configurator 4-7

Dimension GS-2024 Gigabit Ethernet Switch

Figure 4-5 Web Configurator: Logout Screen

4.5.2 Help

The web configurator’s online help has descriptions of individual screens and some supplementary information.

Click the

Help link from a web configurator screen to view an online help description of that screen.

4-8 Introducing the Web Configurator

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 5

System

This chapter describes the system status (web configurator home page) and port details screens.

Status and Port Details

5.1 About System Statistics and Information

The home screen of the web configurator displays a port statistical summary with links to each port showing
statistical details.

5.2 Port Status Summary

To view the port statistics, click Status in all web configurator screens to display the Status screen as shown next.

Figure 5-1 Status

The following table describes the labels in this screen.

System Status and Port Details 5-1

Dimension GS-2024 Gigabit Ethernet Switch

Table 5-1 Status

LABEL DESCRIPTION

System up Time This field shows how long the system has been running since the last time it was started.

Port This identifies the Gigabit port. Click a port number to display the Port Details screen (refer to

Section 5.2.1).

Link This field displays the speed (either 100M for 100Mbps or 1000M for 1000Mbps) and the duplex

(F for full duplex or H for half duplex). This field also shows whether the port connection is Down.

State This field displays the STP state of the port. The states are FORWARDING (forwarding), which

means the link is functioning normally or STOP (the port is stopped to break a loop or duplicate
path). See the Spanning Tree Protocol chapter for details on STP port states.

LACP This fields displays whether the Link Aggregation Control Protocol (LACP) has been enabled on

the port.

TxPkts This field shows the number of transmitted frames on this port.

RxPkts This field shows the number of received frames on this port.

Errors This field shows the number of received errors on this port.

Tx KB/s This field shows the number of kilobytes per second transmitted on this port.

Rx KB/s This field shows the number of kilobytes per second received on this port.

Up Time This field shows the total amount of time in hours, minutes and seconds the port has been up.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the refresh

interval by typing a new number in the text box and then clicking Set Interval.

Stop Click Stop to halt system statistic polling.

Clear Counter Select a port from the Port drop-down list box and then click Clear Counter to erase the

recorded statistical information for that port.

5.2.1 Port Details

Click a number in the Port column in the Status screen to display individual port statistics. Use this screen to
check status and detailed performance data about an individual port on the switch.

5-2 System Status and Port Details

Dimension GS-2024 Gigabit Ethernet Switch

Figure 5-2 Status: Port Details

The following table describes the labels in this screen.

Table 5-2 Status: Port Details

LABEL DESCRIPTION

Port Info

Port NO. This field identifies the Gigabit port described in this screen.

Link This field shows whether the port connection is down, and the speed/duplex mode.

Status This field shows the training state of the ports. The states are FORWARDING (forwarding), which

means the link is functioning normally or STOP (the port is stopped to break a loop or duplicate
path).

LACP This field shows if LACP is enabled on this port or not.

TxPkts This field shows the number of transmitted frames on this port

RxPkts This field shows the number of received frames on this port

Errors This field shows the number of received errors on this port.

System Status and Port Details 5-3

Dimension GS-2024 Gigabit Ethernet Switch

Table 5-2 Status: Port Details

LABEL DESCRIPTION

Tx KB/s This field shows the number kilobytes per second transmitted on this port.

Rx KB/s This field shows the number of kilobytes per second received on this port.

Up Time This field shows the total amount of time the connection has been up.

Tx Packet
The following fields display detailed information about frames transmitted.

TX Packets This field shows the number of good frames (unicast, multicast and broadcast) transmitted.

Multicast This field shows the number of good multicast frames transmitted.

Broadcast This field shows the number of good broadcast frames transmitted.

Pause This field shows the number of 802.3x Pause frames transmitted.

Rx Packet

The following fields display detailed information about frames received.

RX Packets This field shows the number of good frames (unicast, multicast and broadcast) received.

Multicast This field shows the number of good multicast frames received.

Broadcast This field shows the number of good broadcast frames received.

Pause This field shows the number of 802.3x Pause frames received.

Giant This field shows the number of packets dropped because they were bigger than the maximum

frame size.

TX Collision

The following fields display information on collisions while transmitting.

Single This is a count of successfully transmitted frames for which transmission is inhibited by exactly one

collision.

Multiple This is a count of successfully transmitted frames for which transmission was inhibited by more than

one collision.

Excessive This is a count of frames for which transmission failed due to excessive collisions. Excessive

collision is defined as the number of maximum collisions before the retransmission count is reset.

Late This is the number of times a late collision is detected, that is, after 512 bits of the frame have

already been transmitted.

Error Packet The following fields display detailed information about frames received that were in error.

RX CRC This field shows the number of frames received with CRC (Cyclic Redundant Check) error(s).

Length This field shows the number of frames received with a length that was out of range.

Runt This field shows the number of frames received that were too short (shorter than 64 octets),

5-4 System Status and Port Details

Dimension GS-2024 Gigabit Ethernet Switch

Table 5-2 Status: Port Details

LABEL DESCRIPTION

including the ones with CRC errors.

Rx Packet

This field shows the number of good packets (unicast, multicast and broadcast) received.

64 This field shows the number of packets (including bad packets) received that were 64 octets in

length.

65-127 This field shows the number of packets (including bad packets) received that were between 65 and

127 octets in length.

128-255 This field shows the number of packets (including bad packets) received that were between 128

and 255 octets in length.

256-511 This field shows the number of packets (including bad packets) received that were between 256

and 511 octets in length.

512-1023 This field shows the number of packets (including bad packets) received that were between 512

and 1023 octets in length.

1024-1518 This field shows the number of packets (including bad packets) received that were between 1024

and 1518 octets in length.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the refresh

interval by typing a new number in the text box and then clicking Set Interval.

Stop Click Stop to stop port statistic polling.

System Status and Port Details 5-5

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 6

Basic

This chapter describes how to configure the System Info, General Setup, Switch Setup, IP Setup

and Port Setup screens.

Setting

6.1 Introducing the Basic Setting Screens

The System Info screen displays general switch information (such as firmware version number) and hardware
polling information (such as fan speeds). The
identification information. The
current time and date from an external server when you turn on your switch. The real time is then displayed in the
switch logs. The
screen allows you to configure a switch IP address, subnet mask and DNS (domain name server) for management
purposes.

Switch Setup screen allows you to set up and configure global switch features. The IP Setup

General Setup screen also allows you to set the system time manually or get the

General Setup screen allows you to configure general switch

6.2 System Information

In the navigation panel, click Basic Setting and then System Info to display the screen as shown. You can check
the firmware version number and monitor the switch temperature, fan speeds and voltage in this screen.

Figure 6-1 System Info

Basic Setting 6-1

Dimension GS-2024 Gigabit Ethernet Switch

The following table describes the labels in this screen.

Table 6-1 System Info

LABEL DESCRIPTION

System Name This field displays the switch 's model name.

ZyNOS F/W
Version

Ethernet Address This field refers to the Ethernet MAC (Media Access Control) address of the switch.

Hardware Monitor

Temperature Unit The switch has temperature sensors that are capable of detecting and reporting if the

Temperature MAC, CPU and PHY refer to the location of the temperature sensors on the switch printed

Current This field displays the current temperature measured at this sensor.

Threshold This field displays the upper temperature limit at this sensor.

Status This field displays Normal for temperatures below the threshold and Error for those above.

Fan speed (RPM) A properly functioning fan is an essential component (along with a sufficiently ventilated, cool

This field displays the version number of the switch 's current firmware including the date
created.

temperature rises above the threshold. You may choose the temperature unit (Centigrade or
Fahrenheit) in this field.

circuit board.

MAX This field displays the maximum temperature measured at this sensor.

MIN This field displays the minimum temperature measured at this sensor.

operating environment) in order for the device to stay within the temperature threshold. Each
fan has a sensor that is capable of detecting and reporting if the fan speed falls below the
threshold shown.

Current This field displays this fan's current speed in Revolutions Per Minute (RPM).

MAX This field displays this fan's maximum speed measured in Revolutions Per Minute (RPM).

MIN This field displays this fan's minimum speed measured in Revolutions Per Minute (RPM).

"<41" is displayed for speeds too small to measure (under 2000 RPM).

Threshold This field displays the minimum speed at which a normal fan should work.

Status Normal indicates that this fan is functioning above the minimum speed. Error indicates that

this fan is functioning below the minimum speed.

Voltage (V) The power supply for each voltage has a sensor that is capable of detecting and reporting if

the voltage falls out of the tolerance range.

Current This is the current voltage reading.

MAX This field displays the maximum voltage measured at this point.

MIN This field displays the minimum voltage measured at this point.

6-2 Basic Setting

Dimension GS-2024 Gigabit Ethernet Switch

Table 6-1 System Info

LABEL DESCRIPTION

Threshold This field displays the minimum voltage at which the switch should work.

Status Normal indicates that the voltage is within an acceptable operating range at this point;

otherwise Error is displayed.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the

refresh interval by typing a new number in the text box and then clicking Set Interval.

Stop Click Stop to halt statistic polling.

6.3 General Setup

Click Basic Setting and General Setup in the navigation panel to display the screen as shown.

Figure 6-2 General Setup

The following table describes the labels in this screen.

Table 6-2 General Setup

LABEL DESCRIPTION

System Name Choose a descriptive name for identification purposes. This name consists of up to 32

printable characters; spaces are not allowed.

Location Enter the geographic location (up to 32 characters) of your switch.

Basic Setting 6-3

Dimension GS-2024 Gigabit Ethernet Switch

Table 6-2 General Setup

LABEL DESCRIPTION

Contact Person's
Name

Use Time Server
When Bootup

Time Server IP
Address

Current Time This field displays the time you open this menu (or refresh the menu).

New Time
(hh:min:ss)

Current Date This field displays the date you open this menu.

Enter the name (up to 32 characters) of the person in charge of this switch.

Enter the time service protocol that a timeserver sends when you turn on the switch. Not all
timeservers support all protocols, so you may have to use trial and error to find a protocol that
works. The main differences between them are the time format.

Daytime (RFC 867) format is day/month/year/time zone of the server.

Time (RFC-868) format displays a 4-byte integer giving the total number of seconds since

1970/1/1 at 0:0:0.

NTP (RFC-1305) is similar to Time (RFC-868).

None is the default value. Enter the time manually. Each time you turn on the switch, the time

and date will be reset to 1970-1-1 0:0.

Enter the IP address (or URL if you configure a domain name server in the IP Setup screen) of
your timeserver. The switch searches for the timeserver for up to 60 seconds. If you select a
timeserver that is unreachable, then this screen will appear locked for 60 seconds. Please
wait.

Enter the new time in hour, minute and second format. The new time then appears in the
Current Time field after you click Apply.

New Date (yyyy­mm-dd)

Time Zone Select the time difference between UTC (Universal Time Coordinated, formerly known as

Apply Click Apply to save the settings.

Cancel Click Cancel to start configuring the screen again.

Enter the new date in year, month and day format. The new date then appears in the Current
Date field after you click Apply.

GMT, Greenwich Mean Time) and your time zone from the drop-down list box.

6.4 Introduction to VLANs

A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical
networks. Devices on a logical network belong to one group. A device can belong to more than one group. With
VLAN, a device cannot directly talk to or hear from devices that are not in the same group(s); the traffic must first
go through a router.

In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and security among the
subscribers. When properly configured, VLAN prevents one subscriber from accessing the network resources of
another on the same LAN, thus a user will not see the printers and hard disks of another user in the same building.

VLAN also increases network performance by limiting broadcasts to a smaller and more manageable logical
broadcast domain. In traditional switched environments, all broadcast packets go to each and every individual
port. With VLAN, all broadcasts are confined to a specific broadcast domain.

6-4 Basic Setting

Note that VLAN is unidirectional: it only governs outgoing traffic.

Dimension GS-2024 Gigabit Ethernet Switch

See the

VLAN chapter for information on port-based and 802.1Q tagged VLANs.

6.5 IGMP Snooping

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership in a Multicast
group - it is not used to carry user data. Refer to RFC 2236 for information IGMP version 2 and RFC 1112 for
IGMP version 1.

A layer-2 switch can passively snoop on IGMP Query, Report and Leave (IGMP version 2) packets transferred
between IP multicast routers/switches and IP multicast hosts to learn the IP multicast group membership. It checks
IGMP packets passing through it, picks out the group registration information, and configures multicasting
accordingly.

Without IGMP snooping, multicast traffic is treated in the same manner as broadcast traffic, that is, it is forwarded
to all ports. With IGMP snooping, group multicast traffic is only forwarded to ports that are members of that
group. IGMP Snooping generates no additional network traffic, allowing you to significantly reduce multicast
traffic passing through your switch.

6.6 Switch Setup Screen

Click Basic Setting and then Switch Setup in the navigation panel display the screen as shown. The VLAN setup
screens change depending on whether you choose
screen. Refer to the chapter on VLANs.

802.1Q or Port Based in the VLAN Type field in this

Figure 6-3 Switch Setup

Basic Setting 6-5

Dimension GS-2024 Gigabit Ethernet Switch

The following table describes the labels in this screen.

Table 6-3 Switch Setup

LABEL DESCRIPTION EXAMPLE

VLAN Type Choose 802.1Q or Port Based from the drop-down list box. The VLAN Setup

screen changes depending on whether you choose 802.1Q VLAN Type or Port
Based VLAN Type in this screen. See Section 6.4 and the VLAN chapter for
more information on VLANs.

IGMP
Snooping

MAC Address
Learning

Aging Time Enter a time from 10 to 3000 seconds. This is how long all dynamically learned

GARP Timer: Switches join VLANs by making a declaration. A declaration is made by issuing a Join message
using GARP. Declarations are withdrawn by issuing a Leave message. A Leave All message terminates all
registrations. GARP timers set declaration timeout values. See the chapter on VLAN setup for more background
information.

Join Timer Join Timer sets the duration of the Join Period timer for GVRP in milliseconds.

Select Active to enable IGMP snooping have group multicast traffic only
forwarded to ports that are members of the VLAN specified in the VLAN field,
significantly reducing multicast traffic passing through your switch. See Section

6.5 for more information on IGMP snooping.

MAC address learning reduces outgoing traffic broadcasts. For MAC address
learning to occur on a port, the port must be active.

MAC addresses remain in the MAC address table before they age out (and must
be relearned).

Each port has a Join Period timer. The allowed Join Time range is between 100
and 65535 milliseconds; the default is 200 milliseconds. See the chapter on
VLAN setup for more background information.

802.1Q

300

200 milliseconds

(default)

Leave Timer Leave Timer sets the duration of the Leave Period timer for GVRP in

milliseconds. Each port has a single Leave Period timer. Leave Time must be two
times larger than Join Timer; the default is 600 milliseconds.

Leave All

Timer

Priority Queue Assignment

IEEE 802.1p defines up to eight separate traffic types by inserting a tag into a MAC-layer frame that contains bits to
define class of service. Frames without an explicit priority tag are given the default priority of the ingress port. Use
the next two fields to configure the priority level-to-physical queue mapping.

The switch has four physical queues that you can map to the eight priority levels. On the switch, traffic assigned to
higher index queues gets through faster while traffic in lower index queues is dropped if the network is congested.

See also Queuing Method and 802.1p Priority in Port Setup for related information.

Priority Level (The following descriptions are based on the traffic types defined in the IEEE 802.1d standard (which
incorporates the 802.1p).

Level 7 Typically used for network control traffic such as router configuration messages.

Level 6 Typically used for voice traffic that is especially sensitive to jitter (jitter is the variations in delay).

Leave All Timer sets the duration of the Leave All Period timer for GVRP in
milliseconds. Each port has a single Leave All Period timer. Leave All Timer must
be larger than Leave Timer; the default is 10000 milliseconds.

600 milliseconds

(default)

10000

milliseconds

(default)

6-6 Basic Setting

Dimension GS-2024 Gigabit Ethernet Switch

Table 6-3 Switch Setup

LABEL DESCRIPTION

Level 5 Typically used for video that consumes high bandwidth and is sensitive to jitter.

Level 4

Level 3

Level 2 This is for “spare bandwidth”.

Level 1

Level 0 Typically used for best-effort traffic.

Apply Click Apply to save your changes back to the switch.

Cancel Click Cancel to begin configuring this screen afresh.

Typically used for controlled load, latency-sensitive traffic such as SNA (Systems Network
Architecture) transactions.

Typically used for “excellent effort” or better than best effort and would include important business
traffic that can tolerate some delay.

This is typically used for non-critical “background” traffic such as bulk transfers that are allowed but
that should not affect other applications and users.

6.7 IP Setup

Use the IP Setup screen to configure the switch IP address, default gateway device, the default domain name
server and the management VLAN ID. The default gateway specifies the IP address of the default gateway (next
hop) for outgoing traffic.

Figure 6-4 IP Setup

The following table describes the labels in this screen.

Basic Setting 6-7

Dimension GS-2024 Gigabit Ethernet Switch

Table 6-4 IP Setup

LABEL DESCRIPTION

Domain
Name Server

In-Band Management IP Address

DHCP Client Select this option if you have a DHCP server that can assign the switch an IP address, subnet mask,

Static IP
Address

IP Address Enter the IP address of your switch in dotted decimal notation for example 192.168.1.1.

IP Subnet

Default

Gateway

Management
VID

DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and
vice versa. Enter a domain name server IP address in order to be able to use a domain name
instead of an IP address.

a default gateway IP address and a domain name server IP address automatically.

Select this option if you don’t have a DHCP server or if you wish to assign static IP address
information to the switch. You need to fill in the following fields when you select this option.

Enter the IP subnet mask of your switch in dotted decimal notation for example 255.255.255.0.

Mask

Enter the IP address of the default outgoing gateway in dotted decimal notation, for example

192.168.1.254.

Enter the VLAN identification number associated with the switch IP address. Management VLAN ID
is the VLAN ID of the CPU and is used for management only. The default is "1". All ports, by default,
are fixed members of this "management VLAN" in order to manage the device from any port. If a
port is not a member of this VLAN, then users on that port cannot access the device. To access the
switch make sure the port that you are connected to is a member of Management VLAN.

Out-of-band Management IP Address

IP Address Enter the IP address of the management port in dotted decimal notation for example 192.168.0.1.

If you change this IP address, make sure the computer connected to this management port is in the
same subnet before accessing the GS-2024.

IP Subnet
Mask

Default
Gateway

Apply Click Apply to save your changes back to the switch.

Cancel Click Cancel to begin configuring the fields again.

Enter the IP subnet mask in dotted decimal notation for example 255.255.255.0.

Enter the IP address of the default outgoing gateway in dotted decimal notation, for example

192.168.0.254.

6.8 Port Setup

Click Basic Setting and then Port Setup in the navigation panel to enter the port configuration screen.

6-8 Basic Setting

Dimension GS-2024 Gigabit Ethernet Switch

Figure 6-5 Port Setup

The following table describes the fields in this screen.

Table 6-5 Port Setup

LABEL DESCRIPTION

Port This is the port index number.

Active Select this check box to enable a port. The factory default for all ports is enabled. A port must be

enabled for data transmission to occur.

Name Enter a descriptive name that identifies this port.

Type This field displays 100/1000M for this connection.

Basic Setting 6-9

Dimension GS-2024 Gigabit Ethernet Switch

Table 6-5 Port Setup

LABEL DESCRIPTION

Speed/Duplex Select the speed and the duplex mode of the connection on this port. Choices are Auto, 100M/Half

Duplex, 100M/Full Duplex, 1000M/Half Duplex and 1000M/Full Duplex.

Selecting Auto (auto-negotiation) makes one Gigabit port able to negotiate with a peer automatically
to obtain the connection speed and duplex mode that both ends support. When auto-negotiation is
turned on, a Gigabit port on the switch negotiates with the peer automatically to determine the
connection speed and duplex mode. If the peer Ethernet port does not support auto-negotiation or
turns off this feature, the switch determines the connection speed by detecting the signal on the
cable and using half duplex mode. When the switch’s auto-negotiation is turned off, a Gigabit port
uses the pre-configured speed and duplex mode when making a connection, thus requiring you to
make sure that the settings of the peer Ethernet port are the same in order to connect.

Flow Control A concentration of traffic on a port decreases port bandwidth and overflows buffer memory causing

packet discards and frame losses. Flow Control is used to regulate transmission of signals to
match the bandwidth of the receiving port.

The switch uses IEEE802.3x flow control in full duplex mode and backpressure flow control in half
duplex mode.

IEEE802.3x flow control is used in full duplex mode to send a pause signal to the sending port,
causing it to temporarily stop sending signals when the receiving port memory buffers fill.

Back Pressure flow control is typically used in half duplex mode to send a "collision" signal to the
sending port (mimicking a state of packet collision) causing the sending port to temporarily stop
sending signals and resend later. Select this option to enable flow control.

802.1p
Priority

Jumbo Frame Jumbo frames are used to forward non-standard packet sizes on your network. These frames can

The switch uses this priority value for incoming frames without an IEEE 802.1p priority queue tag.
The switch uses this priority value internally and does not add an IEEE 802.1p priority tag. See

Priority Queue Assignment in Table 6-3 for more information. See also Priority Queue
Assignment in Switch Setup and Queuing Method for related information.

deliver frames of up to 9216 bytes instead of standard Ethernet frames of 1522 bytes. Fewer
packets are required for large data transfer, improving traffic throughput on the port.

Select this option to allow a port to send and receive jumbo frames.

The peer device must also support non-standard packet traffic.

Apply Click Apply to save your changes back to the switch.

Cancel Click Cancel to begin configuring this screen afresh.

6-10 Basic Setting

Advanced Application 1

Part IV:

Advanced Application 1

This part shows you how to configure the VLAN, Static MAC Forwarding, STP and Bandwidth

Control Advanced Application screens.

IV

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 7

VLAN

The type of screen you see here depends on the VLAN Type you selected in the Switch Setup screen.

This chapter shows you how to configure 802.1Q tagged and port-based VLANs. See the General,

Switch and IP Setup chapter for more information.

7.1 Introduction to IEEE 802.1Q Tagged VLAN

Tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the VLAN membership of a frame
across bridges - they are not confined to the switch on which they were created. The VLANs can be created
statically by hand or dynamically through GVRP. The VLAN ID associates a frame with a specific VLAN and
provides the information that switches need to process the frame across the network. A tagged frame is four bytes
longer than an untagged frame and contains two bytes of TPID (Tag Protocol Identifier, residing within the
type/length field of the Ethernet frame) and two bytes of TCI (Tag Control Information, starts after the source
address field of the Ethernet frame).

The CFI (Canonical Format Indicator) is a single-bit flag, always set to zero for Ethernet switches. If a frame
received at an Ethernet port has a CFI set to 1, then that frame should not be forwarded as it is to an untagged port.
The remaining twelve bits define the VLAN ID, giving a possible maximum number of 4,096 (212) VLANs. Note
that user priority and VLAN ID are independent of each other. A frame with VID (VLAN Identifier) of null (0) is
called a priority frame, meaning that only the priority level is significant and the default VID of the ingress port is
given as the VID of the frame. Of the 4096 possible VIDs, a VID of 0 is used to identify priority frames and value
4095 (FFF) is reserved, so the maximum possible VLAN configurations are 4,094

TPID
2 Bytes

User Priority
3 Bits

CFI
1 Bit

VLAN ID
12 bits

7.1.1 Forwarding Tagged and Untagged Frames

Each port on the switch is capable of passing tagged or untagged frames. To forward a frame from an 802.1Q
VLAN-aware switch to an 802.1Q VLAN-unaware switch, the switch first decides where to forward the frame
and then strips off the VLAN tag. To forward a frame from an 802.1Q VLAN-unaware switch to an 802.1Q
VLAN-aware switch, the switch first decides where to forward the frame, and then inserts a VLAN tag reflecting
the ingress port's default VID. The default PVID is VLAN 1 for all ports, but this can be changed.

7.1.2 Automatic VLAN Registration

GARP and GVRP are the protocols used to automatically register VLAN membership across switches.

VLAN 7-1

Dimension GS-2024 Gigabit Ethernet Switch

GARP

GARP (Generic Attribute Registration Protocol) allows network switches to register and de-register attribute
values with other GARP participants within a bridged LAN. GARP is a protocol that provides a generic
mechanism for protocols that serve a more specific application, for example, GVRP.

GARP Timers

Switches join VLANs by making a declaration. A declaration is made by issuing a Join message using GARP.
Declarations are withdrawn by issuing a Leave message. A Leave All message terminates all registrations. GARP
timers set declaration timeout values.

GVRP

GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a way for switches to register
necessary VLAN members on ports across the network. Enable this function to permit VLANs groups beyond the
local switch.

Please refer to the following table for common GARP terminology.

Table 7-1 GARP Terminology

VLAN

PARAMETER

VLAN Type Permanent VLAN This is a static VLAN created manually.

VLAN
Administrative
Control

VLAN Tag Control Tagged Ports belonging to the specified VLAN tag all outgoing frames

Dynamic VLAN This is a VLAN configured by a GVRP registration/deregistration

Registration Fixed Fixed registration ports are permanent VLAN members.

Registration
Forbidden

Normal Registration Ports dynamically join a VLAN using GVRP.

Untagged Ports belonging to the specified don't tag all outgoing frames

TERM DESCRIPTION

process.

Ports with registration forbidden are forbidden to join the specified
VLAN.

transmitted.

transmitted.

VLAN Port Port VID This is the VLAN ID assigned to untagged frames that this port received.

Acceptable frame
type

You may choose to accept both tagged and untagged incoming frames
or just tagged incoming frames on a port.

7-2 VLAN

Dimension GS-2024 Gigabit Ethernet Switch

Ingress filtering If set, the switch discards incoming frames for VLANs that do not have

this port as a member

7.2 802.1Q VLAN

Follow the steps below to set the 802.1Q VLAN Type on the switch.

1. Select 802.1Q as the VLAN Type in the Switch Setup screen (under Basic Setting) and click Apply.

Figure 7-1 Selecting a VLAN Type

2. Click VLAN under Advanced Application to display the VLAN Status screen as shown next.

Figure 7-2 802.1Q VLAN Status

The following table describes the labels in this screen.

Table 7-2 802.1Q VLAN Status

LABEL DESCRIPTION

The Number of
VLAN

Index This is the VLAN index number.

VID VID is the PVID, the Port VLAN ID assigned to untagged frames or priority-tagged frames

Port Number This column displays the ports that are participating in a VLAN. A tagged port is marked as T,

Elapsed Time This field shows how long it has been since a normal VLAN was registered or a static VLAN

This is the number of VLANs configured on the switch.

received on this port that you configure in the VLAN Port Setting screen.

an untagged port is marked as U and ports not participating in a VLAN in marked as “–“.

was set up.

VLAN 7-3

Dimension GS-2024 Gigabit Ethernet Switch

Table 7-2 802.1Q VLAN Status

LABEL DESCRIPTION

Status This field shows how this VLAN was added to the switch; dynamically using GVRP or

statically, that is, added as a permanent entry.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the

refresh interval by typing a new number in the text box and then clicking Set Interval.

Stop Click Stop to halt 802.1Q VLAN statistic polling.

Previous / Next
Page

Click one of these buttons to show the previous/next screen if all status information cannot be
seen in one screen.

7.2.1 802.1Q VLAN Port Settings

To configure the 802.1Q VLAN settings on a port, click the VLAN Port Setting link in the VLAN Status screen.

Figure 7-3 802.1Q VLAN Port Settings

7-4 VLAN

Dimension GS-2024 Gigabit Ethernet Switch

The following table describes the labels in this screen.

Table 7-3 802.1Q VLAN Port Settings

LABEL DESCRIPTION

GVRP GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a way for

switches to dynamically register necessary VLAN members on ports across the network.

Select this check box to permit VLAN groups beyond the local switch.

Port This field displays the port numbers.

Ingress Check If this check box is selected for a port, the device discards incoming frames for VLANs that do

not include this port in its member set.

PVID Each port on the switch is capable of passing tagged or untagged frames. To forward a frame

from an 802.1Q VLAN-unaware switch to an 802.1Q VLAN-aware switch, the switch first
decides where to forward the frame, and then inserts a VLAN tag reflecting the default ingress
port's VLAN ID, the PVID. The default PVID is VLAN 1 for all ports, but this can be changed to
any number between 1 and 4094.

GVRP Select this check box to permit VLANs groups beyond the local switch on this port. GVRP

(GARP VLAN Registration Protocol) is a registration protocol that defines a way for switches to
register necessary VLAN members on ports across the network.

Acceptable
Frame Type

Apply Click Apply to save the changes.

Cancel Click Cancel to start configuring the screen again.

Specify the type of frames allowed on a port. Choices are All, Tag Only and Untag Only.

Select All to accept all frames with untagged or tagged frames on this port. This is the default
setting.

Select Tag Only to accept only tagged frames on this port. All untagged frames are dropped.

Select Untag Only to accept only untagged frames on this port. All tagged frames are dropped.

7.2.2 802.1Q Static VLAN

You can dynamically have a port join a VLAN group using GVRP, permanently assign a port to be a member of a
VLAN group or prohibit a port from joining a VLAN group in this screen. Click Static VLAN in the VLAN
Status screen to display the screen as shown next.

VLAN 7-5

Dimension GS-2024 Gigabit Ethernet Switch

Figure 7-4 802.1Q Static VLAN

The following table describes the labels in this screen.

Table 7-4 802.1Q Static VLAN

LABEL DESCRIPTION

ACTIVE Select this check box to enable the VLAN.

Name Enter a descriptive name for this VLAN group for identification purposes.

VLAN Group ID Enter the VLAN ID for this static VLAN entry; the valid range is between 1 and 4094.

Port The port number identifies the port you are configuring.

Control Select Normal for the port to dynamically join this VLAN group using GVRP. This is the default

selection.

Select Fixed for the port to be a permanent member of this VLAN group.

Select Forbidden if you want to prohibit the port from joining this VLAN group.

Tagging Select TX Tagging if you want the port to tag all outgoing frames transmitted with this VLAN

Group ID.

Add Click Add to save the new rule to the switch. It then displays in the summary table at the bottom

of the screen.

Cancel Click Cancel to reset the fields to your previous configuration.

7-6 VLAN

Dimension GS-2024 Gigabit Ethernet Switch

Table 7-4 802.1Q Static VLAN

LABEL DESCRIPTION

Clear Click Clear to clear the fields to the factory defaults.

7.2.3 Viewing and Editing VLAN Settings

To view a summary of the VLAN configuration, scroll down to the summary table at the bottom of the Static
VLAN screen.

To change the settings of a rule, click a number in the VID field.

Figure 7-5 Static VLAN: Summary Table

The following table describes the labels in this screen.

Table 7-5 Static VLAN: Summary Table

LABEL DESCRIPTION

VID This field displays the ID number of the VLAN group. Click the number to edit the VLAN settings.

Active This field indicates whether the VLAN settings are enabled (Yes) or disabled (No).

Name This field displays the descriptive name for this VLAN group.

Delete Check the rule(s) that you want to remove in the Delete column, and then click the Delete button.

Cancel Click Cancel to clear the Delete check boxes.

VLAN 7-7

Dimension GS-2024 Gigabit Ethernet Switch

VID1 Example Screen

Figure 7-6 VID1 Example Screen

7.3 Introduction to Port-based VLANs

Port-based VLANs are VLANs where the packet forwarding decision is based on the destination MAC address
and its associated port.

Port-based VLANs require allowed outgoing ports to be defined for each port. Therefore, if you wish to allow two
subscriber ports to talk to each other, for example, between conference rooms in a hotel, you must define the
egress (an egress port is an outgoing port, that is, a port through which a data packet leaves) for both ports.

Port-based VLANs are specific only to the switch on which they were created.

The port-based VLAN setup screen is shown next. The CPU management port forms a VLAN with all Gigabit
ports.

7-8 VLAN

Dimension GS-2024 Gigabit Ethernet Switch

7.3.1 Configuring a Port-based VLAN

Select Port Based as the VLAN Type in the Switch Setup screen under Basic Setting and then click VLAN
under Advanced Application to display the next screen.

Figure 7-7 Port Based VLAN Setup (All Connected)

VLAN 7-9

Dimension GS-2024 Gigabit Ethernet Switch

Figure 7-8 Port Based VLAN Setup (Port isolation)

The following table describes the labels in this screen.

Table 7-6 Port Based VLAN Setup

LABEL DESCRIPTION

Setting Wizard Choose from All connected or Port isolation.

All connected means all ports can communicate with each other, that is, there are no virtual

LANs. All incoming and outgoing ports are selected (Figure 7-7). This option is the most flexible
but also the least secure.

Port isolation means that each port can only communicate with the CPU management port and
cannot communicate with each other. All incoming ports are selected while only the CPU
outgoing port is selected (Figure 7-8). This option is the most limiting but also the most secure.

After you make your selection, click Apply (top right of screen) to display the screens as
mentioned above. You can still customize these settings by adding/deleting incoming or outgoing
ports, but you must also click Apply at the bottom of the screen.

Incoming These are the ingress ports; an ingress port is an incoming port, that is, a port through which a

data packet enters. If you wish to allow two subscriber ports to talk to each other, you must define
the ingress port for both ports. The numbers in the top row denote the incoming port for the
corresponding port listed on the left (its outgoing port). CPU refers to the switch management
port. By default it forms a VLAN with all Gigabit ports. If it does not form a VLAN with a particular
port then the switch cannot be managed from that port.

7-10 VLAN

Dimension GS-2024 Gigabit Ethernet Switch

Table 7-6 Port Based VLAN Setup

LABEL DESCRIPTION

Outgoing These are the egress ports; an egress port is an outgoing port, that is, a port through which a

data packet leaves. If you wish to allow two subscriber ports to talk to each other, you must define
the egress port for both ports. CPU refers to the switch management port. By default it forms a
VLAN with all Gigabit ports. If it does not form a VLAN with a particular port then the switch
cannot be managed from that port.

Apply Click Apply to save the changes, including the “wizard settings”.

Cancel Click Cancel to start configuring the screen again.

VLAN 7-11

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 8

Static MAC Forward Setup

Use these screens to configure static MAC address forwarding.

8.1 Introduction to Static MAC Forward Setup

A static MAC address entry is an address that has been manually entered in the MAC address learning table.
Static MAC addresses do not age out. When you set up static MAC address rules, you are setting static MAC
addresses for a port. Devices that match static MAC address rules on a port can only receive traffic on that port
and cannot receive traffic on other ports. This may reduce unicast flooding.

8.2 Configuring Static MAC Forwarding

Click Static MAC Forwarding to display the configuration screen as shown.

Figure 8-1 Static MAC Forwarding

The following table describes the labels in this screen.

Table 8-1 Static MAC Forwarding

LABEL DESCRIPTION

Active Select this check box to activate your rule. You may temporarily deactivate a rule without deleting

it by clearing this check box.

Name Enter a descriptive name for identification purposes for this static MAC address-forwarding rule.

MAC Address Enter the MAC address in valid MAC address format, that is, six hexadecimal character pairs.

Static MAC addresses do not age out.

Static MAC Forward Setup 8-1

Dimension GS-2024 Gigabit Ethernet Switch

Table 8-1 Static MAC Forwarding

LABEL DESCRIPTION

VID Enter the VLAN identification number.

Port Select a port where the MAC address entered in the previous field will be automatically forwarded.

Add Click Add to save the new rule to the switch. It then displays in the summary table at the bottom of

the screen.

Cancel Click Cancel to reset the fields to your previous configuration.

Clear Click Clear to clear the fields to the factory defaults.

8.3 Viewing and Editing Static MAC Forwarding Rules

To view a summary of the rule configuration, scroll down to the summary table at the bottom of the Static MAC
Forwarding screen.

To change the settings of a rule, click a number in the Index field.

Figure 8-2 Static MAC Forwarding: Summary Table

The following table describes the labels in this screen.

Table 8-2 Static MAC Forwarding: Summary Table

LABEL DESCRIPTION

Index Click an index number to modify a static MAC address rule for a port.

Active This field displays whether this static MAC address forwarding rule is active (Yes) or not (No).

You may temporarily deactivate a rule without deleting it.

Name This field displays the descriptive name for identification purposes for this static MAC address-

forwarding rule.

MAC Address This field displays the MAC address that will be forwarded and the VLAN identification number to

which the MAC address belongs.

Port This field displays the port where the MAC address shown in the next field will be forwarded.

Delete Check the rule(s) that you want to remove in the Delete column, then click the Delete button.

Cancel Click Cancel to clear the selected checkboxes in the Delete column.

8-2 Static MAC Forward Setup

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 9

Spanning Tree Protocol

This chapter introduces the Spanning Tree Protocol (STP).

9.1 Introduction to Spanning Tree Protocol (STP)

STP detects and breaks network loops and provides backup links between switches, bridges or routers. It allows a
switch to interact with other STP-compliant switches in your network to ensure that only one route exists between
any two stations on the network.

9.1.1 STP Terminology

The root bridge is the base of the spanning tree; it is the bridge with the lowest identifier value (MAC address).

Path cost is the cost of transmitting a frame onto a LAN through that port. It is assigned according to the speed of
the link to which a port is attached. The slower the media, the higher the cost - see the next table.

Table 9-1 STP Path Costs

LINK SPEED RECOMMENDED VALUE RECOMMENDED RANGE ALLOWED RANGE

Path Cost 4Mbps 250 100 to 1000 1 to 65535

Path Cost 10Mbps 100 50 to 600 1 to 65535

Path Cost 16Mbps 62 40 to 400 1 to 65535

Path Cost 100Mbps 19 10 to 60 1 to 65535

Path Cost 1Gbps 4 3 to 10 1 to 65535

Path Cost 10Gbps 2 1 to 5 1 to 65535

On each bridge, the root port is the port through which this bridge communicates with the root. It is the port on
this switch with the lowest path cost to the root (the root path cost). If there is no root port, then this switch has
been accepted as the root bridge of the spanning tree network.

For each LAN segment, a designated bridge is selected. This bridge has the lowest cost to the root among the
bridges connected to the LAN.

9.1.2 How STP Works

After a bridge determines the lowest cost-spanning tree with STP, it enables the root port and the ports that are the
designated ports for connected LANs, and disables all other ports that participate in STP. Network packets are
therefore only forwarded between enabled ports, eliminating any possible network loops.

STP-aware switches exchange Bridge Protocol Data Units (BPDUs) periodically. When the bridged LAN
topology changes, a new spanning tree is constructed.

Spanning Tree Protocol 9-1

Dimension GS-2024 Gigabit Ethernet Switch

Once a stable network topology has been established, all bridges listen for Hello BPDUs (Bridge Protocol Data
Units) transmitted from the root bridge. If a bridge does not get a Hello BPDU after a predefined interval (Max
Age), the bridge assumes that the link to the root bridge is down. This bridge then initiates negotiations with other
bridges to reconfigure the network to re-establish a valid network topology.

9.1.3 STP Port States

STP assigns five port states (see next table) to eliminate packet looping. A bridge port is not allowed to go directly
from blocking state to forwarding state so as to eliminate transient loops.

Table 9-2 STP Port States

PORT STATE DESCRIPTION

Disabled STP is disabled (default).

Blocking Only configuration and management BPDUs are received and processed.

Listening All BPDUs are received and processed.

Learning All BPDUs are received and processed. Information frames are submitted to the learning process

but not forwarded.

Forwarding All BPDUs are received and processed. All information frames are received and forwarded.

9.2 STP Status

Click Advanced Application and then Spanning Tree Protocol in the navigation panel to display the STP status
as shown in the screen next.

9-2 Spanning Tree Protocol

Dimension GS-2024 Gigabit Ethernet Switch

Figure 9-1 Spanning Tree Protocol: Status

The following table describes the labels in this screen.

Table 9-3 Spanning Tree Protocol: Status

LABEL DESCRIPTION

Spanning Tree Protocol This field displays Running if STP is activated. Otherwise, it displays Down.

Bridge Root refers to the base of the spanning tree (the root bridge). Our Bridge is this switch.

This switch may also be the root bridge.

Bridge ID This is the unique identifier for this bridge, consisting of bridge priority plus MAC

address. This ID is the same for Root and Our Bridge if the switch is the root switch.

Hello Time (second) This is the time interval (in seconds) at which the root switch transmits a configuration

message. The root bridge determines Hello Time, Max Age and Forwarding Delay

Max Age (second) This is the maximum time (in seconds) a switch can wait without receiving a

configuration message before attempting to reconfigure.

Forwarding Delay
(second)

This is the time (in seconds) the root switch will wait before changing states (that is,
listening to learning to forwarding).

Cost to Bridge This is the path cost from the root port on this switch to the root switch.

Port ID This is the priority and number of the port on the switch through which this switch must

communicate with the root of the Spanning Tree.

Spanning Tree Protocol 9-3

Dimension GS-2024 Gigabit Ethernet Switch

Table 9-3 Spanning Tree Protocol: Status

LABEL DESCRIPTION

Topology Changed
Times

Time Since Last Change This is the time since the spanning tree was last reconfigured.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the

Stop Click Stop to halt STP statistic polling.

This is the number of times the spanning tree has been reconfigured.

refresh interval by typing a new number in the text box and then clicking Set Interval.

9.2.1 Configuring STP

To configure STP, click the Configuration link in the Spanning Tree Protocol screen as shown next.

Figure 9-2 Spanning Tree Protocol: Configuration

9-4 Spanning Tree Protocol

Dimension GS-2024 Gigabit Ethernet Switch

The following table describes the labels in this screen.

Table 9-4 Spanning Tree Protocol: Configuration

LABEL DESCRIPTION

Active Select this check box to activate STP.

Bridge Priority Bridge priority is used in determining the root switch, root port and designated port. The switch with

the highest priority (lowest numeric value) becomes the STP root switch. If all switches have the
same priority, the switch with the lowest MAC address will then become the root switch. The
allowed range is 0 to 61440.

The lower the numeric value you assign, the higher the priority for this bridge.

Bridge Priority determines the root bridge, which in turn determines Hello Time, Max Age and
Forwarding Delay.

Hello Time This is the time interval in seconds between BPDU (Bridge Protocol Data Units) configuration

message generations by the root switch. The allowed range is 1 to 10 seconds.

Max Age This is the maximum time (in seconds) a switch can wait without receiving a BPDU before

attempting to reconfigure. All switch ports (except for designated ports) should receive BPDUs at
regular intervals. Any port that ages out STP information (provided in the last BPDU) becomes the
designated port for the attached LAN. If it is a root port, a new root port is selected from among the
switch ports attached to the network. The allowed range is 6 to 40 seconds.

Forwarding
Delay

This is the maximum time (in seconds) a switch will wait before changing states. This delay is
required because every switch must receive information about topology changes before it starts to
forward frames. In addition, each port needs time to listen for conflicting information that would
make it return to a blocking state; otherwise, temporary data loops might result. The allowed range
is 4 to 30 seconds.

As a general rule:

2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)

Port This field displays the port number.

Active Select this check box to activate STP on this port.

Priority Configure the priority for each port here.

Priority decides which port should be disabled when more than one port forms a loop in a switch.
Ports with a higher priority numeric value are disabled first. The allowed range is between 0 and
255 and default value is 128.

Path Cost Path cost is the cost of transmitting a frame on to a LAN through that port. It is assigned according

to the speed of the bridge. The slower the media, the higher the cost - see Table 9-1 for more
information.

Apply Click Apply to save your changes back to the switch.

Cancel Click Cancel to begin configuring this screen afresh.

Spanning Tree Protocol 9-5

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 10

Bandwidth Control

This chapter shows you how you can cap the maximum bandwidth allowed from specific source(s) to

specified destination(s) using the Bandwidth Control setup screen.

10.1 Introduction to Bandwidth Control

Bandwidth control means defining a maximum allowable bandwidth for incoming and/or out-going traffic flows
on a port. Click Advanced Application and then Bandwidth Control in the navigation panel to bring up the
screen as shown next.

Figure 10-1 Bandwidth Control

The following table describes the labels in this screen.

Bandwidth Control 10-1

Dimension GS-2024 Gigabit Ethernet Switch

Table 10-1 Bandwidth Control

LABEL DESCRIPTION

Active Select the checkbox to activate bandwidth control on the switch.

You may temporarily deactivate bandwidth control without deleting the rules configured by clearing
this checkbox.

Port This field displays the port number.

Active Make sure to select this check box to activate your rule. You may temporarily deactivate a rule

without deleting it by clearing this check box.

Ingress Rate Specify the maximum bandwidth allowed in Kilobytes per second (Kbps) for the incoming traffic flow

on a port. Select a number from the drop-down list box.

Scheme Select Drop (default) from the drop-down list box to discard all incoming packets that are over the

maximum allowable bandwidth on a port.

A concentration of traffic on a port decreases port bandwidth and overflows buffer memory causing
packet discards and frame losses. Flow Control is used to regulate transmission of signals to match
the bandwidth of the receiving port.

The switch uses IEEE802.3x flow control in full duplex mode.

IEEE802.3x flow control is used in full duplex mode to send a pause signal to the sending port,
causing it to temporarily stop sending signals when the receiving port memory buffers fill.

Apply Click Apply to save the settings.

Cancel Click Cancel to reset the fields to your previous configuration.

10-2 Bandwidth Control

Advanced Application 2

Part V:

Advanced Application 2

This part shows you how to configure the Broadcast Storm Control, Mirroring, Link

Aggregation, Port Authentication, Port Security, Access Control, Differentiated Services and

Queuing Method Advanced Application screens.

V

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 11

Broadcast

Storm Control

11.1 Introducing Broadcast Storm Control

Broadcast storm control limits the number of broadcast, multicast and unknown unicast packets the switch
receives per second on the ports. When the maximum number of allowable broadcast, multicast and/or unknown
unicast packets is reached per second, the subsequent packets are discarded. Enable this feature to reduce
broadcast, multicast and/or unknown unicast packets in your network.

11.2 Configuring Broadcast Storm Control

Click Advanced Application, Broadcast Strom Control in the navigation panel to display the screen as shown
next.

Figure 11-1 Broadcast Storm Control

The following table describes the labels in this screen.

Broadcast Storm Control 11-1

Dimension GS-2024 Gigabit Ethernet Switch

Table 11-1 Broadcast Storm Control

LABEL DESCRIPTION

Active Select this check box to enable broadcast storm control on the switch.

Storm
Control
Type

Packet
Limit

Port This field displays a port number.

Active Make sure to select this check box to activate broadcast storm control on a port.

Apply Click Apply to save your changes back to the switch.

Cancel Click Cancel to begin configuring this screen afresh.

Select Broadcast Only, Broadcast and multicast, Broadcast and unknown unicast or Broadcast,
multicast and unknown unicast from the drop-down list box.

Select from the drop-down list box, how many packets a port receives per second based on the chosen
storm control type.

11-2 Broadcast Storm Control

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 12

Mirroring

This chapter discusses the Mirror setup screens.

12.1 Introduction to Port Mirroring

Port mirroring allows you to copy traffic going from one port to another port in order that you can examine the
traffic from the monitor port (the port you copy the traffic to) without interference.

12.2 Port Mirroring Configuration

Click Advanced Application, Mirroring in the navigation panel to display the Mirroring screen.

You must first select a monitor port. A monitor port is a port that copies the traffic of another port. After you
select a monitor port, configure a mirroring rule in the related fields.

Figure 12-1 Mirroring

The following table describes the related labels in this screen.

Table 12-1 Mirroring

LABEL DESCRIPTION

Active Select this check box to activate port mirroring on the switch.

Monitor Port The monitor port is the port you copy the traffic to in order to examine it in more detail without

interfering with the traffic flow on the original port(s). Select a port from the drop-down list box.

Direction Specify the direction of the traffic to mirror by selecting from the drop-down list box. Choices are

Egress (outgoing), Ingress (incoming) and Both.

Mirrored
Port

Apply Click Apply to save the settings.

Mirroring 12-1

Select a port from the drop-down list box. Select this option to mirror the traffic on a port.

Dimension GS-2024 Gigabit Ethernet Switch

Table 12-1 Mirroring

LABEL DESCRIPTION

Cancel Click Cancel to reset the fields.

12-2 Mirroring

Dimension GS-2024 Gigabit Ethernet Switch

Chapter 13

Link

This chapter shows you how to logically aggregate physical links to form one logical, higher-bandwidth

Aggregation

link.

13.1 Introduction to Link Aggregation

Link aggregation (trunking) is the grouping of physical ports into one logical higher-capacity link. You may want
to trunk ports if for example, it is cheaper to use multiple lower-speed links than to under-utilize a high-speed, but
more costly, single-port link.

However, the more ports you aggregate then the fewer available ports you have. A link aggregation group is one
logical link containing multiple ports.

13.1.1 Dynamic Link Aggregation

The GS-2024 adheres to the 802.3ad standard for static and dynamic (LACP) port trunking.

The GS-2024 supports the link aggregation IEEE802.3ad standard. This standard describes the Link Aggregate
Control Protocol (LACP), which is a protocol that dynamically creates and manages trunk groups.

When you enable LACP link aggregation on a port, the port can automatically negotiate with the ports at the
remote end of a link to establish trunk groups. LACP also allows port redundancy, that is, if an operational port
fails, then one of the “standby” ports become operational without user intervention

Please note that:

 You must connect all ports point-to-point to the same Ethernet switch and configure the ports for LACP

trunking.

 LACP only works on full-duplex links.

 All ports in the same trunk group must have the same media type, speed, duplex mode and flow control

settings.

Configure trunk groups or LACP before you connect the Ethernet switch to avoid causing network topology
loops.

13.1.2 Link Aggregation ID

LACP aggregation ID consists of the following information:

Link Aggregation 13-1

Dimension GS-2024 Gigabit Ethernet Switch

[(0000,00-00-00-00-00-00,0000,00,0000)] [(0000,00-00-00-00-00-00,0000,00,0000)]

Local switch

0000 00-00-00-00-00 0000 00 0000

System priority Local switch MAC address Key Port Priority1 Port Number1

Peer switch

0000 00-00-00-00-00 0000 00 0000

System priority MAC address Key Port Priority1 Port Number1

Figure 13-1 Aggregation ID

13.2 Link Aggregation Protocol Status

Click Advanced Application, Link Aggregation in the navigation panel to display the Link Aggregation
Protocol Status screen.

Figure 13-2 Link Aggregation: Link Aggregation Protocol Status

1

This is “0” as it is the aggregator ID for the link aggregation group, not the individual port.

13-2 Link Aggregation

Dimension GS-2024 Gigabit Ethernet Switch

The following table describes the labels in this screen.

Table 13-1 Link Aggregation: Link Aggregation Protocol Status

LABEL DESCRIPTION

Index This field displays the trunk ID to identify a trunk group, that is, one logical link containing

multiple ports.

Aggregator ID Refer to Figure 13-1 for more information on this field.

Enabled Port These are the ports you have configured in the Link Aggregation screen to be in the trunk

group.

Synchronized Ports These are the ports that are currently transmitting data as one logical link in this trunk group.

Poll Interval(s) The text box displays how often (in seconds) this screen refreshes. You may change the

refresh interval by typing a new number in the text box and then clicking Set Interval.

Stop Click Stop to halt statistic polling.

13.3 Link Aggregation Setup

Click Configuration in the Link Aggregation Protocol Status screen to display the screen shown next.

You can configure up to four link aggregation groups and each group can aggregate up to eight ports.

Link Aggregation 13-3

Dimension GS-2024 Gigabit Ethernet Switch

Figure 13-3 Link Aggregation: Configuration

The following table describes the labels in this screen.

Table 13-2 Link Aggregation: Configuration

LABEL DESCRIPTION

Link Aggregation Control Protocol

Active Select this checkbox to enable Link Aggregation Control Protocol (LACP).

System Priority LACP system priority is a number between 1 and 65,355. The switch with the lowest system

priority (and lowest port number if system priority is the same) becomes the LACP “server”. The
LACP “server” controls the operation of LACP setup. Enter a number to set the priority of an
active port using Link Aggregate Control Protocol (LACP). The smaller the number, the higher
the priority level.

13-4 Link Aggregation