Zyxel GS-1124 EE User Manual [ru]

Dimension

GS-1116 and GS-1124

Gigabit Switches

User’s Guide

March 2004

Version 0.1

Dimension GS-1116/GS-1124 Gigabit 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-1116/GS-1124 Gigabit 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 out­dated 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-1116/GS-1124 Gigabit Switch

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:

(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 BCIQ A Warning

Certifications

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.

Select the certification you wish to view from this page.

iv Interference Statements and Warnings

Dimension GS-1116/GS-1124 Gigabit 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

• Warranty information

• Date that you received your product.

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

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

Customer Support v

Dimension GS-1116/GS-1124 Gigabit Switch

SUPPORT E-MAIL TELEPHONE1 WEB SITE METHOD

LOCATION

FINLAND [e-mail] [phone] www.zyxel.fi ZyXEL Communications Oy

SALES E-MAIL FAX1 FTP SITE

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

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00700 Helsinki
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vi Customer Support

Dimension GS-1116/GS-1124 Gigabit Switch

Table of Contents

Chapter 1 Getting to Know the Switch.................................................................................................1-1

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

1.2 Features.................................................................................................................................1-2

1.3 Package Contents..................................................................................................................1-3

1.4 Gigabit Switch Network Applications ..................................................................................1-3

Chapter 2 Hardware Description and Installation.................................................................................2-1

2.1 Desktop Installation ..............................................................................................................2-1

2.2 Rack-mounted Installation....................................................................................................2-2

2.3 Rear Panel.............................................................................................................................2-3

2.4 Front Panel............................................................................................................................2-3

Chapter 3 Troubleshooting ...................................................................................................................3-1

3.1 Introduction...........................................................................................................................3-1

3.2 Improper Network Cabling and Topology............................................................................3-2

Table of Contents vii

Dimension GS-1116/GS-1124 Gigabit Switch

List of Figures

Figure 1-1 GS-1116 ..............................................................................................................................1-1

Figure 1-2 GS-1124 ..............................................................................................................................1-1

Figure 1-3 Gigabit Switch for Server Farm ..........................................................................................1-4

Figure 1-4 Gigabit Switch for Super User Work Groups .....................................................................1-5

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

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

Figure 2-3 Switch Mounting to an EIA Standard 19-inch Rack...........................................................2-2

Figure 2-4 GS-1116/GS-1124 Rear Panel ............................................................................................2-3

Figure 2-5 GS-1116 Front Panel...........................................................................................................2-3

Figure 2-6 GS-1124 Front Panel...........................................................................................................2-3

Figure 2-7 Transceiver Installation Example........................................................................................2-5

Figure 2-8 Installed Transceiver...........................................................................................................2-5

Figure 2-9 Opening the Transceiver’s Latch Example.........................................................................2-6

Figure 2-10 Transceiver Removal Example .........................................................................................2-6

Figure 2-11 GS-1116 Front Panel LEDs ..............................................................................................2-7

Figure 2-12 GS-1116 Front Panel LEDs ..............................................................................................2-7

List of Tables

Table 2-1 GS-1116/GS-1124: Front Panel Ports ..................................................................................2-3

Table 2-2 Mini GBIC Slots LED Descriptions.....................................................................................2-4

Table 2-3 Network Cable Types...........................................................................................................2-7

Table 2-4 Front Panel LED Descriptions .............................................................................................2-8

Table 3-1 Troubleshooting PWR LED .................................................................................................3-1

Table 3-2 Troubleshooting LNK/ACT LED ........................................................................................3-1

Table 3-3 Troubleshooting 1000 LEDs ................................................................................................3-1

Table 3-4 Troubleshooting FDX LED..................................................................................................3-2

Table 3-5 Troubleshooting Improper Network Cabling and Topology................................................3-2

List of Figures/Tables ix

Dimension GS-1116/GS-1124 Gigabit Switch

Preface

Congratulations on your purchase of the Dimension GS-1116 or GS-1124 Gigabit Switch.

This preface introduces you to the Dimension GS-1116 and GS-1124 Gigabit Switch and discusses the
organization and conventions of this User’s Guide. It also provides information on other related
documentation.

About Gigabit Ethernet

Gigabit Ethernet is a 1Gbps (1000Mbps) extension of the IEEE 802.3 Ethernet networking standard.
Its primary applications are in corporate LANs, campus networks and service provider networks where
it can be used to tie together existing 100Mbps Ethernet networks.

About the Dimension GS-1116 and GS-1124 Gigabit Switch

The GS-1116 or GS-1124 is designed to improve your network performance with high-speed data
transmission over copper wire. The GS-1116 or GS-1124 provides an ideal upgrade path for existing
Ethernet-based networks that need more bandwidth. It can be installed as a backbone network while
retaining existing investments in Ethernet hubs, switches and wiring infrastructure.

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 GS-1116 or GS-1124 Gigabit Switch may be referred to as the switch in this manual
except where we refer to a specific switch.

Related Documentation

ZyXEL Web Site

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

x Preface

Dimension GS-1116/GS-1124 Gigabit Switch

Chapter 1

Getting to Know the Switch

This chapter describes the key features, benefits and applications of the switch.

1.1 Introduction

The switch is designed for the campus or building environment as a high bandwidth backbone. The
GS-1116 has 16 100/1000 Mbps RJ-45 ports. The GS-1124 has twenty-four 100/1000 Mbps RJ-45
ports. You can connect the switch to existing Ethernet routers, switches or hubs without additional
expensive wiring or equipment installation.

Figure 1-1 GS-1116

Figure 1-2 GS-1124

Gigabit Ethernet over copper technology is a cost effective way of upgrading network equipment from
fast Ethernet to Gigabit speed by using standard 4-pair Category 5 copper cabling. The Mini GBIC
slots allow for fiber optic high-speed backbone connections.

Getting to Know the GS1116/GS-1124 1-1

Dimension GS-1116/GS-1124 Gigabit Switch

Both ports 15 and 16 in the GS-1116 (or 23 and 24 in the GS-1124) support 3.3V Mini GBIC. The
GBIC port auto detects between Giga copper and Mini GBIC. The Mini GBIC module is optional.
When the Mini GBIC module is not installed, these act as Giga copper connections.

The switch is an ideal solution for solving traffic block at the core of the network. It offers auto­negotiation 100/1000Base-T Gigabit Ethernet ports that can significantly improve your network
backbone performance.

1.2 Features

• Conforms to IEEE 802.3 10Base-T, IEEE802.3u 100Base-TX, IEEE802.3z Gigabit fiber and
IEEE802.3ab 1000Base-T standards.

• IEEE 802.1p supports two priority queues for outgoing traffic helping improving network
efficiency and performance.

• Auto-negotiating 100/1000Mbps Ethernet RJ-45 ports.

• Automatic MDI/MDIX supported.

• Switching fabric of 32Gbps in the GS-1116 and 48Gbps in the GS-1124.

• N-way Auto-negotiation supported.

• Embedded 4K MAC address table providing 4000 MAC addresses entries.

• 2 Megabits memory buffer.

• 3.3V Mini GBIC port for Gigabit fiber transceiver. .

• Two Gigabit copper ports.

• Supports auto address learning.

• Supports store-and-forwarding switching architecture for abnormal packet filtering.

• Back-Pressure-Base flow control on Half-duplex mode Ethernet ports.

• Pause-Frame-Base flow control on Full-duplex mode Ethernet ports.

• No-Blocking full wire speed architecture.

• One fan for good ventilation and to increase system heat sink performance.

• Power, 1000, LNK/ACT, FDX/COL LEDs and Mini-GBIC LEDs.

• Standard 19-inch rack mount design

1.2.1 IEEE 802.1p Class of Service

The IEEE 802.1p Class of Service (CoS) provides two queues for high and low priority traffic. This
improves network efficiency and performance by giving higher priority to outgoing traffic. The lower
queue has a priority value in the range of zero to three and the higher queue has a priority value in the
range of four to seven.

1-2 Getting to Know the GS1116/GS-1124

Dimension GS-1116/GS-1124 Gigabit Switch

 When the Mini GBIC module is installed, the Mini GBIC (Giga fiber) port

has higher priority than Giga copper port. When the Mini GBIC port is
connected, the Giga copper port is disabled.

1.3 Package Contents

Compare the contents of your GS-1116/GS-1124 Gigabit Switch package with the checklist below. If
any item is missing or damaged, please contact your local dealer.

• GS-1116 or GS-1124 Gigabit switch

• Power cord

• Quickstart Guide

• This User’s Guide in CD-ROM format.

• Four rubber feet

• Rack mount brackets

1.4 Gigabit Switch Network Applications

This section provides a sample of network topologies in which the Gigabit switch functions as a high­bandwidth backbone switch for a server farm or as a high-bandwidth backbone switch for a super user
workgroup. The switch is an ideal upgrade for 100Mbps Ethernet networks. You can connect existing
switches, hubs or computers with Gigabit 1000Base-T Ethernet adapters to the switch.

1.4.1 Gigabit Switch for Server Farm

The following figure depicts a 24-port 100/1000 TX plus 2 Mini GBIC Switch connected to a
computer network and a server farm. For enterprise networks where large data broadcasts are
constantly processed, this switch is suitable for connecting departmental switches to the core Gigabit
switch through a number of servers. Connecting servers to the core Gigabit switch allows each end
station to rapidly access the server’s data and to smoothly communicate with all the devices in the
network.

Getting to Know the GS1116/GS-1124 1-3

Dimension GS-1116/GS-1124 Gigabit Switch

Figure 1-3 Gigabit Switch for Server Farm

1.4.2 Gigabit Switch for “Super User” Work Groups

You can use the GS-1116 or the GS-1124 to connect servers, switches, workstations and computers
(the Gigabit 1000Base-T NIC must be installed onto the computer) to each other.

The following figure depicts a typical backbone application of the switch in an enterprise
environment. The “Normal User” workgroup and the “Super User” workgroup are connected to a
switch via a 10/100Mbps switch and a Gigabit switch respectively. This enables the two networks to
communicate with each other, prioritizing the “Super User” network with higher connection speeds
though a Gigabit switch.

The “Normal User” workgroup runs applications that are not time sensitive and do not require large
amounts of bandwidth, such as Internet browsing and e-mail.

The “Super User” workgroup runs bandwidth-hungry applications like large FTP file transfers and
real time applications such as video conferencing.

The switch automatically learns node addresses, which are subsequently used to filter and forward all
traffic based on the destination address. You can use the Mini GBIC slots to connect with a fiber optic
network that extends your Ethernet network and to separate “Normal User” and “Super User”
networks.

1-4 Getting to Know the GS1116/GS-1124

Dimension GS-1116/GS-1124 Gigabit Switch

Figure 1-4 Gigabit Switch for Super User Work Groups

Getting to Know the GS1116/GS-1124 1-5

Dimension GS-1116/GS-1124 Gigabit Switch

Chapter 2

Hardware Description and Installation

This section discusses switch installations, hardware and functional overview.

The switch is suited to an office environment where it can be rack mounted on standard EIA racks or
placed as a standalone switch on a desktop.

 For proper ventilation, allow at least 4 inches (10 cm) of clearance at

the front, 3.4 inches (8 cm) at the back of the switch. This is especially
important for enclosed rack installations.

2.1 Desktop Installation

1. Set the switch upside-down on a study level space with a power outlet nearby.

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

of cables and the power cord.

3. Remove the adhesive backing from the supplied rubber feet.

4. 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.

5. Turn the switch right side up after you attach the rubber feet.

Figure 2-1 Attaching Rubber Feet

Hardware Description and Installation 2-1

Dimension GS-1116/GS-1124 Gigabit Switch

 Do not block the ventilation holes. Leave space between switches

when stacking.

2.2 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 the included
rack-mounting kit.

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

Similarly, attach the other bracket.

Figure 2-2 Attaching Mounting Brackets and Screws

After attaching both mounting brackets, position the switch in the rack by lining up the holes in the

2.

brackets with the appropriate holes on the rack. Secure the switch to the rack with the rack’s
mounting screws.

Figure 2-3 Switch Mounting to an EIA Standard 19-inch Rack

2-2 Hardware Description and Installation

Dimension GS-1116/GS-1124 Gigabit Switch

2.3 Rear Panel

The ventilation fan and three-pronged power receptacle are located on the rear panel of the switch.

Figure 2-4 GS-1116/GS-1124 Rear Panel

2.3.1 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 100-240 VAC, 50-60 Hz power source. Push the power switch to the ON position.

2.4 Front Panel

The following graphics show the front panels of the GS-1116 and the GS-1124.

Figure 2-5 GS-1116 Front Panel

Figure 2-6 GS-1124 Front Panel

Table 2-1 GS-1116/GS-1124: Front Panel Ports

CONNECTOR DESCRIPTION

1-16 and 1-24 RJ-45 ports Connect these 100/1000 Mbps RJ-45 Ethernet ports to computers, hubs, Ethernet

switches or routers.

17 - 18 and 25 - 26
mini GBIC ports

Use mini GBIC transceivers in these ports for fiber-optical connections to
backbone Ethernet switches.

2.4.1 100/1000Mbps RJ-45 Auto-negotiating Ports

The GS-1116 has 16 100/1000 Mbps RJ-45 ports. The GS-1124 has twenty-four 100/1000 Mbps RJ­45 ports. The auto-negotiation feature allows the switches to detect the speed of incoming
transmission and adjust appropriately without manual intervention. It allows data transfers of either

• 100Mbps in half-duplex mode

Hardware Description and Installation 2-3

Dimension GS-1116/GS-1124 Gigabit Switch

• 100Mbps or 1000Mbps in full-duplex mode depending on your Ethernet network.

2.4.2 Auto-sensing (Auto MDI/MDIX) Ports

You can connect each RJ-45 auto-sensing port to a computer, hub or switch using either a straight
through or a crossover Ethernet cable.

2.4.3 Mini GBIC Slots

These are slots for Mini GBIC (Gigabit Interface Converter) transceivers. A transceiver is a single unit
that houses a transmitter and a receiver. The switch 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)

Table 2-2 Mini GBIC Slots LED Descriptions

LED COLOR STATUS DESCRIPTION

Green

On The link to a 1000 Mbps (1 Gbps) Ethernet network is up. LNK

Off There is no link to a 1000 Mbps (1 Gbps) Ethernet network or the 1000

Mbps network link is down.

Blinking The system is transmitting/receiving Ethernet traffic. ACT Yellow

Off The system is not transmitting/receiving Ethernet traffic.

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.

2-4 Hardware Description and Installation

Dimension GS-1116/GS-1124 Gigabit Switch

Figure 2-7 Transceiver Installation Example

Figure 2-8 Installed Transceiver

Transceiver Removal

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

1. Remove the fiber-optic cables from the transceiver.

2. Unlock the transceiver’s latch (latch styles vary).

3. Pull the transceiver out of the slot.

4. Put the transceiver’s dust cover on the transceiver.

Hardware Description and Installation 2-5

Dimension GS-1116/GS-1124 Gigabit Switch

Figure 2-9 Opening the Transceiver’s Latch Example

Figure 2-10 Transceiver Removal Example

 Keep the dust cover on a fiber optic module until you connect it.

Use the appropriate Ethernet or fiber-optic cables to connect the module to an Ethernet switch. With a
fiber-optic module, remove the dust covers from the connectors. You may need to clean the fiber-optic
cable’s connectors with a cotton swab dipped in alcohol.

2.4.4 Front Panel Connections

You can use unshielded twisted pair (UTP) or shielded twisted-pair (STP) Ethernet cables for RJ-45
ports. The following table describes the types of network cable used for the different connection
speeds.

2-6 Hardware Description and Installation

Dimension GS-1116/GS-1124 Gigabit Switch

Table 2-3 Network Cable Types

SPEED NETWORK CABLE TYPE

100Mbps 100Ω 2-pair UTP/STP Category 5

1000Mbps 100Ω 4-pair UTP/STP Category 5

 Make sure the cable length between connections does not exceed 100

meters (328 feet).

2.4.5 Front Panel LEDs

The LEDs give real-time status information.

Figure 2-11 GS-1116 Front Panel LEDs

Figure 2-12 GS-1116 Front Panel LEDs

The following table provides LED descriptions.

Hardware Description and Installation 2-7

Dimension GS-1116/GS-1124 Gigabit Switch

Table 2-4 Front Panel LED Descriptions

SYSTEM

LED COLOR STATUS DESCRIPTION

PWR

Green

On The switch is turned on and receiving power.

Off The switch is off or not receiving power.

1000 BASE-T ETHERNET PORTS

LED COLOR STATUS DESCRIPTION

1000

LNK/ACT

FDX/COL

Green

Green

Yellow

On A link to a 1000Mbps Ethernet device is up.

Off The port is not connected to a 1000Mbps Ethernet device.

On The port is connecting with an Ethernet device.

Blinking The port is receiving or transmitting data.

Off No Ethernet device is attached.

On The port is operating in full-duplex mode.

Blinking

Off No device is attached or the device is in half-duplex mode.

The port is operating in half-duplex mode and collisions are
occurring. The more collisions there are, the faster the LED
blinks.

MINI-GBIC SLOTS

LED COLOR STATUS DESCRIPTION

On Port is connected at 1000Mbps.

LNK Green

ACT Orange Blinking The port is receiving or transmitting data.

Off Port is not connected at 1000Mbps.

2-8 Hardware Description and Installation

Dimension GS-1116/GS-1124 Gigabit Switch

Chapter 3

Troubleshooting

This section describes common problems you may encounter with the switch in your network and

possible solutions.

3.1 Introduction

Troubleshoot the switch using the LEDs to detect problems.

3.1.1 PWR LED

The PWR LED on the front panel does not light up.

Table 3-1 Troubleshooting PWR LED

STEPS CORRECTIVE ACTION

1 Check the connections from your switch to the power source. Make sure you are using the supplied

power cord and that you are using a 100 - 240V AC, 50/60Hz power source.

2 Make sure the power source is turned on and that the switch is receiving sufficient power.

3 If these steps fail to correct the problem, contact your local distributor for assistance.

3.1.2 LNK/ACT or LNK/ACT LED

The LNK/ACT (or LNK/ACT) LED does not light up when a device is connected.

Table 3-2 Troubleshooting LNK/ACT LED

STEPS CORRECTIVE ACTION

1 Verify that the attached device(s) is turned on and properly connected to your switch.

2 Make sure the Ethernet adapters are working on the attached devices.

3 Verify that proper network cable type is used and its length does not exceed 100 meters. For more

information on network cable types, see Table 2-3.

3.1.3 100, 1000 LEDs

The LEDs do not show the speed of my Ethernet device.

Table 3-3 Troubleshooting 1000 LEDs

STEPS CORRECTIVE ACTION

1 Check the connection between the switch and your Ethernet device(s).

2 Verify that you are using the proper cable type and that its length does not exceed 100 meters. For

more information on network cable types, see Table 2-3.

Troubleshooting 3-1

Dimension GS-1116/GS-1124 Gigabit Switch

3.1.4 FDX/COL LED

What is the duplex mode of the Ethernet device?

Table 3-4 Troubleshooting FDX LED

STEPS CORRECTIVE ACTION

The Ethernet device is connected at full-duplex mode if the FDX LED is yellow but not blinking.

1

The Ethernet device is connected at half-duplex mode if the FDX LED is off but the LNK/ACT LED is

2

on or blinking.

3.2 Improper Network Cabling and Topology

Improper network cabling or topology setup is a common cause of poor network performance and
network failure.

Table 3-5 Troubleshooting Improper Network Cabling and Topology

DESCRIPTION PROBLEMS AND CORRECTIVE ACTION

Faulty cables Using faulty network cables may affect data rates and have an impact on your network

performance. Replace with new standard network cables.

Non-standard network
cables

Cabling Length If you use longer cables than are needed, transmission quality may be affected.

Too many hubs
between the computers
in the network

A loop in the data path A data path loop forms when there is more than one path or route between two

Non-standard cables may increase the number of packet collisions and cause other
network problems that affect your network performance. Refer to Table 2-3 for more
information on network cable types.

The network cables should not be longer than the limit of 100 meters.

Too many hubs (or repeaters) between the connected computers in the network may
increase the number of packet collisions or other network problems. Remove
unnecessary hubs from the network.

networked computers. This results in broadcast storms that will severely affect your
network performance. Make sure there are no loops in your network topology.

3-2 Troubleshooting

Dimension GS-1116/GS-1124 Gigabit Switch

Product Specifications

This section provides the specifications of the switch.

GENERAL

IEEE802.3

IEEE802.3u 100BASE-TX

Standards

Uplink Interface

Media Interface Exchange All ports auto-sensing (auto MDI-/MDI-X)

IEEE802.3z Gigabit fiber

IEEE802.3ab 1000Base-T

IEEE802.3x Flow Control

GS-1116: 16x 1000Base-T Ethernet Ports

GS-1124: 24x 1000Base-T Ethernet Ports

Two 3.3V mini-GBIC slots, provide gigabit fiber connectivity

Connector type: RJ-45

Auto-MDIX

Pause frame for 100/1000 Mbps full duplex

Back pressure flow control for 100 Mbps half duplex

Data Transfer Rate

Network Cables

Performance and Management

Packet Forwarding Rate

Switching Method Store-and-forward

MAC Address Table (Auto-learning)

Data Buffer

Layer 2 features

Physical Environment

Weight Main switch: GS-1116: 3.5Kg, GS-1124: 3.5Kg

Fast Ethernet: 100Mbps (half duplex)/200Mbps (full duplex)

Gigabit Ethernet: 2000Mbps(full duplex)

100BASE-TX: 2 pair STP Cat. 5 cable EIA/TIA 568 100Ohm(100M)

1000BASE-T: 4 pair STP Cat. 5 cable EIA/TIA 568 100Ohm(100M)

148800PPS for 100BASE-TX

1488000PPS for 1000BASE-T

GS-1116: 4K entries

GS-1124: 4K entries

GS-1116: 2Mbits

GS-1124: 2Mbits

Bridging: 4K MAC addresses

Switching fabric: GS-1116: 32Gbps

GS-1124: 48Gbps

IEEE802.1p egress, two priority queues

Support Frame size: 1522 bytes

Broadcast storm control

Product Specifications A

Dimension GS-1116/GS-1124 Gigabit Switch

SYSTEM

PWR (Green): On/Off

16/24 x 1000BASE-T ETHERNET PORTS

1000 (Green): On/Off

LED

Dimensions

Power Supply 100 - 240V AC, 50/60Hz internal universal power supply

Power Consumption

Operating Temperature 0ºC to 45ºC (32ºF to 113ºF)

Operational Humidity 10% to 90% (Non-condensing)

EMI FCC Class A, CE, C-Tick for NZ/AUS

Safety UL, cUL

LNK/ACT (Link/Activity), (Green): On/Blinking/Off

FDX/COL (Full-duplex), (Yellow): On/Blinking/Off

MINI-GBIC SLOTS

LNK (Green): On/Off

ACT (Green): Blinking

440(W) x 161(D) x 44(H) mm

19” rack mountable enclosure

GS-1116: 47W max

GS-1124: 69W max

B Product Specifications

Dimension GS-1116/GS-1124 Gigabit Switch

Index

1000/ 100 Ethernet LED.............................. 2-4

802.3x .......................................................... 1-2

About the Dimension Gigabit Switch........... xii

Auto MDI/MDIX......................................... 2-4

Auto-negotiation.......................................... 2-4

Cabling Length ............................................3-2

Campus Environment ..................................1-1

CE .................................................................. iv

Certification .................................................... v

class A............................................................ iv

Collisions .....................................................2-8

Contacting Customer Support....................... vii

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

CoS ..............................................................1-3

Data path loop.............................................. 3-2

Desktop Installation ..................................... 2-1

Installation

Desktop ....................................................2-1

Network Application

Backbone Switch......................................1-3

Network Cable Length Limit .......................2-7

Network Cable Types...................................2-7

1000Mbps ................................................2-7

100Mbps ..................................................2-7

Non-standard network cables.......................3-2

Normal User workgroup ..............................1-4

Package Contents .........................................1-3

Power Connection........................................2-3

Power Receptacle.........................................2-3

Product Specifications

General....................................................... A

Performance and Management................... A

Disclaimer....................................................... ii

Faulty cables ................................................ 3-2

FCC................................................................ iv

FCC Rules...................................................... iv

Features........................................................ 1-2

Federal Communications Commission (FCC)

Interference Statement ............................... iv

Front Panel................................................... 2-3

Front Panel Connections..............................2-6

Front Panel LED.......................................... 2-7

Front Panel LED Descriptions..................... 2-8

GBIC............................................................ 2-4

Gigabit Ethernet............................................ xii

High Bandwidth Backbone.......................... 1-1

IEEE 802.1p................................................. 1-3

Installation

Rack-Mounted .........................................2-2

Physical Environment ................................ A

Rack-mounted Installation ...........................2-2

Rear Panel ....................................................2-3

Related Documentation.................................xii

Repair.............................................................iii

Return Material Authorization number..........iii

RJ-45 ports ...................................................2-4

Server Farm..................................................1-3

Service............................................................iii

Speed............................................................3-1

Store-and-Forward Switching ......................1-2

Super User workgroup .................................1-4

Syntax Conventions ......................................xii

Trademarks .....................................................ii

Transceiver...................................................1-2

Transceiver Installation................................2-5

Transceiver Removal ...................................2-5

Index C

Dimension GS-1116/GS-1124 Gigabit Switch

Troubleshooting

100, 1000 LEDs .......................................3-1

FD LED....................................................3-2

Troubleshooting

Improper Network Cabling and Topology.3-

2

LK/ACT LED ..........................................3-1

PWR LED ................................................3-1

ventilation.................................................... 2-1

Ventilation Fan............................................ 2-3

Warranty........................................................ iii

Work Groups............................................... 1-4

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

Note ........................................................... iii

ZyXEL Web Site...........................................xii

D Index