ZyXEL Communications DIMENSION ES-1124 User manual

Dimension
ES-1124
Unmanaged 24-port Ethernet Switch with 4 Gigabit Ports
User’s Guide
April 2004
Version 1.00

Dimension ES-1124 Ethernet Switch
ii Copyright
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.

Dimension ES-1124 Ethernet Switch
ZyXEL Limited Warranty iii
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.
Interference Statements and Warnings
FCC Interference Statement
This device complies with Part 15 of the FCC rules. Operation is subject to the following
two conditions:

Dimension ES-1124 Ethernet Switch
iv Interference Statements and Warnings
(1) This device may not cause harmful interference.
(2) This device 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
device, 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 DSMF (Bureau of Standards, Metrology and Inspection) A
Warning:
Certifications
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.
(1) Go to www.zyxel.com
(2) Select your product from the drop-down list box on the ZyXEL home page to go to
that product's page.
(3) Select the certification you wish to view from this page.

Dimension ES-1124 Ethernet Switch
Customer Support v
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.
• Warranty information.
• Date you received your product.
• Brief description of the problem and the steps you took to solve it.
Support e-mail Telephone1Web SiteMethod
Location
Sales e-mail Fax1FTP Site
Regular Mail
[email protected] [phone] www.zyxel.com
www.europe.zyxel.com
ftp.zyxel.com
Worldwide
[email protected]w [phone] ftp.europe.zyxel.com
ZyXEL Communications
Corp.
6 Innovation Road II
Science Park
Hsinchu 300
Taiwan
[email protected] [phone]
[phone]
www.us.zyxel.comNorth America
[email protected] [phone] ftp.us.zyxel.com
ZyXEL Communications
Inc.
1130 N. Miller St.
Anaheim
CA 92806-2001
U.S.A.
[email protected] [phone] www.zyxel.deGermany
[email protected] [phone]
ZyXEL Deutschland
GmbH. Adenauerstr.
20/A2 D-52146
Wuerselen
Germany
1“+” is the (prefix) number you enter to make an international telephone call.

Dimension ES-1124 Ethernet Switch
vi Customer Support
Support e-mail Telephone1Web SiteMethod
Location
Sales e-mail Fax1FTP Site
Regular Mail
[phone]France [email protected]
[phone]
www.zyxel.fr ZyXEL France
1 rue des Vergers
Bat. 1 / C
69760 Limonest
France
[email protected] [phone]SPAIN
[email protected] [phone]
www.zyxel.es ZyXEL Communications
Alejandro Villegas 33
1º, 28043 Madrid
Spain
[email protected] [phone] www.zyxel.dkDenmark
[email protected] [phone]
ZyXEL Communications
A/S
Columbusvej 5
2860 Soeborg
Denmark
[email protected] [phone] www.zyxel.noNorway
[email protected] [phone]
ZyXEL Communications
A/S
Nils Hansens vei 13
0667 Oslo
Norway
[email protected] [phone] www.zyxel.seSweden
[email protected] [phone]
ZyXEL Communications
A/S
Sjöporten 4, 41764
Göteborg
Sweden
Finland [email protected] [phone] www.zyxel.fi ZyXEL Communications
Oy
Malminkaari 10
00700 Helsinki
Finland

Dimension ES-1124 Ethernet Switch
viii Table of Contents
Table of Contents
Copyright............................................................................................................................ii
ZyXEL Limited Warranty..................................................................................................iii
Interference Statements and Warnings...............................................................................iii
Customer Support ...............................................................................................................v
List of Figures....................................................................................................................ix
List of Tables .....................................................................................................................ix
Preface ................................................................................................................................x
Chapter 1 Getting to Know Your Switch ........................................................................ 1-1
1.1 Introduction ...................................................................................................... 1-1
1.2 Features ............................................................................................................ 1-2
1.3 Package Contents ............................................................................................. 1-2
1.4 Ethernet Switching Technology........................................................................ 1-2
1.5 Applications ..................................................................................................... 1-3
1.5.1 Standalone Workgroup.............................................................................. 1-3
1.5.2 Bridging .................................................................................................... 1-4
Chapter 2 Hardware Description and Installation........................................................... 2-1
2.1 Desktop Installation.......................................................................................... 2-1
2.2 Rack-Mount Installation................................................................................... 2-2
2.3 Rear Panel ........................................................................................................ 2-3
2.4 Rear Panel Power Connection .......................................................................... 2-3
2.5 Front Panel ....................................................................................................... 2-3
2.5.1 10Base-T/100Base-TX RJ-45 auto-negotiating ports ............................... 2-4
2.5.2 Auto-crossover MDI/MDIX ports............................................................. 2-4
2.5.3 Gigabit uplink ports................................................................................... 2-4
2.5.4 Front Panel Connections ........................................................................... 2-5
2.5.5 Front Panel LEDs...................................................................................... 2-5
Chapter 3 Troubleshooting ............................................................................................. 3-1
3.1 Introduction ...................................................................................................... 3-1
3.1.1 PWR LED ................................................................................................. 3-1
3.1.2 FDX LED .................................................................................................. 3-1
3.1.3 LNK/ACT LED......................................................................................... 3-1
3.1.4 FDX/COL LED......................................................................................... 3-2
3.2 Improper Network Cabling and Topology........................................................ 3-2
Product Specifications .......................................................................................................A
Index .................................................................................................................................. C

Dimension ES-1124 Ethernet Switch
List of Figures/Tables ix
List of Figures
Figure 1-1 The ES-1124.................................................................................................. 1-1
Figure 1-2 Standalone ES-1124 Workgroup Example .................................................... 1-4
Figure 1-3 Bridging Example ......................................................................................... 1-5
Figure 2-1 Attaching Rubber Feet................................................................................... 2-1
Figure 2-2 Attaching Mounting Brackets and Screws..................................................... 2-2
Figure 2-3 Mounting the ES to an EIA standard 19-inch rack ........................................ 2-3
Figure 2-4 Rear Panel of the ES-1124 ............................................................................ 2-3
Figure 2-5 The Front Panel of the ES-1124 .................................................................... 2-4
Figure 2-6 The Front Panel LEDs of the ES-1124 .......................................................... 2-5
List of Tables
Table 2-1 Network Cable Types...................................................................................... 2-5
Table 2-2 The Front Panel LED Descriptions................................................................. 2-5
Table 3-1 Troubleshooting Power LED .......................................................................... 3-1
Table 3-2 Troubleshooting FDX LED............................................................................. 3-1
Table 3-3 Troubleshooting LNK/ACT LED ................................................................... 3-1
Table 3-4 Troubleshooting FDX/COL LED.................................................................... 3-2
Table 3-5 Troubleshooting Improper Network Cabling and Topology ........................... 3-2

Dimension ES-1124 Ethernet Switch
xPreface
Preface
Congratulations on your purchase of the Dimension ES-1124 Ethernet Switch.
About the Dimension ES-1124 Ethernet Switch
The Dimension ES-1124 switch is a cost effective Fast Ethernet multi-port switch ideal
for setting up high performance switched workgroup networks.
The ES-1124 comes with 24TX ports and four Gigabit ports: two Gigabit copper and two
mini GBIC.
General Syntax Conventions
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 Dimension ES-1124 Ethernet Switch will be referred to as ES-1124 or the switch in
this manual.
Unless specified, images of the ES-1124 are used throughout this document.
Related Documentation
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 [email protected].tw or send regular mail to The Technical
Writing Team, ZyXEL Communications Corp., 6 Innovation Road II, Science-Based
Industrial Park, Hsinchu, 300, Taiwan. Thank you!

Dimension ES-1124 Ethernet Switch
Getting To Know Your Switch 1-1
Chapter 1
Getting to Know Your Switch
This chapter describes the key features, benefits and applications of your
switch.
1.1 Introduction
The ES-1124 is a multi-port switch that can be used to build high-performance switched
workgroup networks. This switch is a store-and-forward device that offers low latency
for high-speed networking. The switch is targeted at workgroup, department or
backbone computing environments for SME (small, medium enterprise) businesses.
Figure 1-1 The ES-1124
The ES-1124 features a “store-and-forward “ switching scheme. This allows the switch
to auto-learn and store source address in an 8K-entry MAC address table.
All ports are auto-crossover, that is auto-MDIX ports (Media Dependent Interface
Crossover), so you may use either a straight through Ethernet cable or crossover
Ethernet cable for all Ethernet 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.
The ES-1124 has 24 auto-crossover 10/100Base-TX RJ-45 ports and 2 auto-detect
gigabit ports for higher connection speed.

Dimension ES-1124 Ethernet Switch
1-2 Getting To Know Your Switch
1.2 Features
• Conforms to IEEE802.3 10Base-T, IEEE802.3u 100Base-TX, IEEE802.3ab
1000Base-T, IEEE802.3z Gigabit fiber standards.
• Auto-negotiating 10/100Mbps Ethernet RJ-45 ports.
• Automatic MDI/MDIX supported.
• High switch fabric up to 8.8Gbps.
• N-way Auto-negotiation supported.
• Store-and-forwarding switching architecture for abnormal packet filtering.
• Embedded 8K MAC address table providing 8000 MAC addresses entries.
• 2.5Mbits memory buffer.
• 3.3V MINI GBIC port for Gigabit fiber transceiver.
• Two Gigabit copper ports.
• IEEE 802.1p supports two priority queues for outgoing traffic. Improves
network efficiency and performance.
• Back-Pressure-Base flow control on Half-duplex ports.
• Pause-Frame-Base flow control on Full-duplex ports.
• Supports automatic address learning.
• No-Blocking full wire speed architecture
• Fan free design
• Power, LNK/ACT and FDX/COL LEDs.
• Standard 19-inch rack-mount design.
1.3 Package Contents
Compare the contents of your ES-1124 Ethernet Switch package with the checklist
below. If any item is missing or damaged, please contact your local dealer.
• ES-1124 Ethernet switch
• Power cord
• Quickstart Guide
• This User’s Guide in CD-ROM format.
• Four rubber feet
• Rack mount brackets
1.4 Ethernet Switching Technology
Ethernet Switching Technology has dramatically boosted the total bandwidth of a
network, eliminated congestion problems inherent with CSMA/CD (Carrier Sense
multiple access with Collision Detection) protocol, and greatly reduced
unnecessary transmissions.

Dimension ES-1124 Ethernet Switch
Getting To Know Your Switch 1-3
This revolutionized networking in a number of ways:
• By allowing two-way, simultaneous transmissions over the same port (Full-
duplex), which essentially doubled the bandwidth.
• Reducing the collision domain to a single switch-port, which eliminated the
need for carrier sensing.
• Using the store-and-forward technology’s approach of inspecting each packet
to intercept corrupt or redundant data, switching eliminated unnecessary
transmission that slowed the network.
• By employing address learning, which replaced the inefficient receiving port.
Auto-negotiation regulates the speed and duplex of each port, based on the
capability of both devices. Flow-control allows transmission from a 100Mbps
node to a 10Mbps node without loss of data. Auto-negotiation and flow-control
may require disablement for some networking operations involves legacy
equipment. Disabling the auto-negotiation is accomplished by fixing the speed or
duplex of a port.
Ethernet Switching Technology supplied higher performance at costs lower than
other solutions. Wider bandwidth, no congestion, and the reduction in traffic is
why switching is replacing expensive routers and inefficient hubs as the ultimate
networking solution.
1.5 Applications
This section provides two network topology examples in which the switch is used.
By using the uplink port, the switch can connect with another switch or hub to
interconnect other workgroups to form a larger switched network. The distance between
two switches via fiber cable can be up to 550 meters (multi-mode fiber) or 10 kilometers
(single-mode fiber).
1.5.1 Standalone Workgroup
The switch can be used as a standalone switch to which, computers, servers and printer
server are directly connected to form a small workgroup.

Dimension ES-1124 Ethernet Switch
1-4 Getting To Know Your Switch
Figure 1-2 Standalone ES-1124 Workgroup Example
1.5.2 Bridging
With its large address table (8000 MAC address entries) and high performance, the
switch is an ideal solution for department networks to connect to the corporate backbone
or for connecting network segments.
The following figure depicts a typical segment bridge application of the switch in an
enterprise environment. The two workgroups, the standalone server and the two servers
can all communicate with each other and share all network resources.

Dimension ES-1124 Ethernet Switch
Getting To Know Your Switch 1-5
Figure 1-3 Bridging Example

Dimension ES-1124 Ethernet Switch
Hardware Description and Installation 2-1
Chapter 2
Hardware Description and Installation
This section shows two switch installations, describes the hardware of the
switch and gives a functional overview of the switch.
The switch is suitable for an office environment where it can be rack mounted on
standard EIA racks or as a standalone.
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 Desktop Installation
Step 1. Make sure the switch is clean and dry.
Step 2. Set the switch on a smooth, leveled and sturdy flat space strong enough to
support the weight of the switch and the connected cables. Make sure there is
a power outlet nearby.
Step 3. Make sure there is enough clearance around the switch to allow air
circulation and the attachment of cables and the power cord.
Step 4. Remove the adhesive backing from the supplied rubber feet.
Step 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 devices when stacking.
Figure 2-1 Attaching Rubber Feet

Dimension ES-1124 Ethernet Switch
2-2 Hardware Description and Installation
Do not block the ventilation holes. Leave space between switches
when stacking.
2.2 Rack-Mount 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 the included rack-mounting kit.
Step 1. Align one bracket with the holes on one side of the switch and secure it with
the bracket screws that are smaller than the rack-mounting screws. Similarly,
attach the other brackets.
Figure 2-2 Attaching Mounting Brackets and Screws
Step 2. 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.

Dimension ES-1124 Ethernet Switch
Hardware Description and Installation 2-3
Figure 2-3 Mounting the ES to an EIA standard 19-inch rack
2.3 Rear Panel
The three-pronged power receptacle is located on the rear panel of the switch. Refer to
the Product Specifications for power specification.
Figure 2-4 Rear Panel of the ES-1124
2.4 Rear Panel Power Connection
Connect one end of the supplied power cord to the power receptacle on the back of the
switch and the other end to the appropriate power source.
2.5 Front Panel
The front panel of the ES-1124 consists of 24 auto-crossover 10/100Base-TX RJ-45
ports and two auto-detecting Gigabit uplink ports, which may be a Copper Gigabit port
or a Mini Gigabit Fiber module (optional). The LEDs are also located on the front panel
of the switch.

Dimension ES-1124 Ethernet Switch
2-4 Hardware Description and Installation
Figure 2-5 The Front Panel of the ES-1124
2.5.1 10Base-T/100Base-TX RJ-45 auto-negotiating ports
Your switch comes with 24 crossover 10Base-T/100Base-TX RJ-45 ports. The auto-
negotiation feature allows the switch to detect the speed of incoming transmission and
adjust appropriately without manual intervention. It allows data transfers of either 10
Mbps or 100 Mbps in full-duplex mode.
2.5.2 Auto-crossover MDI/MDIX ports
RJ-45 Ports (Auto MDI/MDIX): 24 auto-crossover 10/100 10Base-T or 100Base-TX
connections.
All ports are auto-crossover, that is, auto-MDIX ports (Media Dependent Interface
Crossover), so you may use either a straight through Ethernet cable or crossover Ethernet
cable for all Ethernet 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.
2.5.3 Gigabit uplink ports
Two Gigabit uplink ports: two auto detecting Giga uplink ports — UTP (unshielded
twisted pair) or Gigabit fiber.
Note that when you connect the Mini GBIC to the switch, you
must disconnect the Giga copper connection if you have
connected it to the device. Otherwise, the switch will not detect
the Mini GBIC. While you using Giga copper port or Mini GBIC
port, only one of them will work, for example, when a Giga copper
port is connected, the Mini GBIC will be disabled.