Zyxel GS1500 user manual
GS1500-24P
Web Managed GbE Switch
Default Login Details
IP Address http://192.168.1.1
User Name admin
Password 1234
Firmware Version 1.00
Edition 1, 8/2009
www.zyxel.com
Copyright © 2009
ZyXEL Communications Corporation
About This User's Guide
About This User's Guide
Intended Audience
This manual is intended for people who want to configure the Switch using the
web configurator.
Related Documentation
• Support Disc
Refer to the included CD for support documents.
Documentation Feedback
Send your comments, questions or suggestions to: techwriters@zyxel.com.tw
Thank you!
The Technical Writing Team, ZyXEL Communications Corp.,
6 Innovation Road II, Science-Based Industrial Park, Hsinchu, 30099, Taiwan.
Need More Help?
More help is available at www.zyxel.com.
• Download Library
Search for the latest product updates and documentation from this link. Read
the Tech Doc Overview to find out how to efficiently use the User Guide and
Quick Start Guide in order to better understand how to use your product.
• Knowledge Base
If you have a specific question about your product, the answer may be here.
This is a collection of answers to previously asked questions about ZyXEL
products.
GS1500-24P User’s Guide
3
About This User's Guide
•Forum
This contains discussions on ZyXEL products. Learn from others who use ZyXEL
products and share your experiences as well.
Customer Support
Should problems arise that cannot be solved by the methods listed above, you
should contact your vendor. If you cannot contact your vendor, then contact a
ZyXEL office for the region in which you bought the device.
See http://www.zyxel.com/web/contact_us.php for contact information. Please
have the following information ready when you contact an office.
• Product model and serial number.
•Warranty Information.
• Date that you received your device.
• Brief description of the problem and the steps you took to solve it.
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GS1500-24P User’s Guide
Document Conventions
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
Warnings tell you about things that could harm you or your device.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The GS1500-24P may be referred to as the “Switch”, the “device”, the “system”
or the “product” in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example,
[ENTER] means the “enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the
[ENTER] key. “Select” or “choose” means for you to use one of the predefined
choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For
example, Maintenance > Log > Log Setting means you first click
Maintenance in the navigation panel, then the Log sub menu and finally the
Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value.
For example, “k” for kilo may denote “1000” or “1024”, “M” for mega may
denote “1000000” or “1048576” and so on.
• “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other
words”.
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5
Document Conventions
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The Switch icon is
not an exact representation of your device.
Switch Computer Notebook computer
Server DSLAM Firewall
Tele p ho n e Switch Router
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GS1500-24P User’s Guide
Safety Warnings
Safety Warnings
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Do not obstruct the device ventillation slots as insufficient airflow may harm your device.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device. Connect it to the right
supply voltage (for example, 110V AC in North America or 230V AC in Europe).
• Use ONLY power wires of the appropriate wire gauge (see Chapter 24 on page 161 for
details) for your device. Connect it to a power supply of the correct voltage (see Chapter
24 on page 161 for details).
• Do NOT allow anything to rest on the power adaptor or cord and do NOT place the
product where anyone can walk on the power adaptor or cord.
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the device and the power
source.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Fuse Warning! Replace a fuse only with a fuse of the same type and rating.
• The length of exposed (bare) power wire should not exceed 7 mm.
• For pluggable equipment (equipment that doesn’t have a fixed power connection), the
socket-outlet shall be installed near the equipment and shall be easily accessible (install
the device within reach of a power outlet and keep the area free of obstructions).
Your product is marked with this symbol, which is known as the WEEE mark.
WEEE stands for Waste Electronics and Electrical Equipment. It means that used
electrical and electronic products should not be mixed with general waste. Used
electrical and electronic equipment should be treated separately.
GS1500-24P User’s Guide
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Safety Warnings
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GS1500-24P User’s Guide
Contents Overview
Contents Overview
Introduction and Hardware ...................................................................................................19
Getting to Know Your Switch ..................................................................................................... 21
Hardware Installation and Connection ....................................................................................... 27
Hardware Panels ....................................................................................................................... 31
Basic Configuration ...............................................................................................................37
The Web Configurator ............................................................................................................... 39
Initial Setup Example ................................................................................................................. 47
System ...................................................................................................................................... 51
Configuration .........................................................................................................................57
Link Aggregation ........................................................................................................................ 59
VLAN ......................................................................................................................................... 67
Spanning Tree Protocol ............................................................................................................. 73
QoS ........................................................................................................................................... 79
Mirroring .................................................................................................................................... 91
SNMP ........................................................................................................................................ 95
Rate Limit ................................................................................................................................ 107
Bandwidth Control and Jumbo Frame ...................................................................................... 111
Power Over Ethernet ................................................................................................................115
Security ................................................................................................................................. 119
MAC Address ......................................................................................................................... 121
802.1x ...................................................................................................................................... 127
Dynamic ARP .......................................................................................................................... 131
Storm Control ........................................................................................................................... 137
Defence Engine ....................................................................................................................... 139
Monitoring and Tools ...........................................................................................................141
Monitoring ................................................................................................................................ 143
Tools ........................................................................................................................................ 149
Troubleshooting & Product Specifications ....................................................................... 155
Troubleshooting ....................................................................................................................... 157
Product Specifications ............................................................................................................. 161
Appendices and Index ......................................................................................................... 167
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Contents Overview
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GS1500-24P User’s Guide
Table of Contents
Table of Contents
About This User's Guide ..........................................................................................................3
Document Conventions............................................................................................................5
Safety Warnings........................................................................................................................7
Contents Overview ................................................................................................................... 9
Table of Contents.................................................................................................................... 11
Part I: Introduction and Hardware ........................................................ 19
Chapter 1
Getting to Know Your Switch.................................................................................................21
1.1 Introduction .......................................................................................................................... 21
1.1.1 Backbone Application ................................................................................................. 21
1.1.2 Bridging Example ....................................................................................................... 22
1.1.3 High Performance Switching Example ....................................................................... 23
1.1.4 IEEE 802.1Q VLAN Application Examples ................................................................ 23
1.2 Ways to Manage the Switch ................................................................................................ 24
1.3 Good Habits for Managing the Switch ................................................................................. 24
Chapter 2
Hardware Installation and Connection .................................................................................27
2.1 Installation Scenarios .......................................................................................................... 27
2.2 Desktop Installation Procedure ........................................................................................... 27
2.3 Mounting the Switch on a Rack .......................................................................................... 27
2.3.1 Rack-mounted Installation Requirements .................................................................. 28
2.3.2 Attaching the Mounting Brackets to the Switch .......................................................... 28
2.3.3 Mounting the Switch on a Rack .................................................................................. 29
Chapter 3
Hardware Panels .....................................................................................................................31
3.1 Overview .............................................................................................................................. 31
3.2 Front Panel ......................................................................................................................... 31
3.2.1 Gigabit Ethernet Ports ............................................................................................... 32
3.2.2 Mini-GBIC Slots ..........................................................................................................33
3.2.3 The RESET Button ..................................................................................................... 35
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3.3 Rear Panel .......................................................................................................................... 35
3.3.1 Power Connector ....................................................................................................... 35
3.4 LEDs .................................................................................................................................. 35
Part II: Basic Configuration................................................................... 37
Chapter 4
The Web Configurator ............................................................................................................39
4.1 Overview .............................................................................................................................. 39
4.2 System Login .................................................................................................................... 39
4.3 The Status Screen .......................................................................................................... 40
4.3.1 Change Your Password .......................................................................................... 44
4.4 Saving Your Configuration ................................................................................................... 44
4.5 Switch Lockout .................................................................................................................. 44
4.6 Resetting the Switch ......................................................................................................... 45
4.7 Logging Out of the Web Configurator ................................................................................. 45
Chapter 5
Initial Setup Example..............................................................................................................47
5.1 Overview .............................................................................................................................. 47
5.1.1 Creating a VLAN ........................................................................................................ 47
5.1.2 Setting Port VID .........................................................................................................48
5.2 Configuring Switch Management IP Address ...................................................................... 49
Chapter 6
System ....................................................................................................................................51
6.1 Overview .............................................................................................................................. 51
6.2 What You Can Do ................................................................................................................ 51
6.3 Information ........................................................................................................................ 52
6.4 Time Setting ....................................................................................................................... 53
6.5 IP Setting Screen ............................................................................................................... 53
6.6 User Account ...................................................................................................................... 54
6.7 Port Setting ......................................................................................................................... 55
Part III: Configuration ............................................................................ 57
Chapter 7
Link Aggregation .................................................................................................................... 59
7.1 Overview ............................................................................................................................. 59
7.2 What You Can Do ................................................................................................................ 59
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7.3 What You Need to Know ......................................................................................................59
7.3.1 Dynamic Link Aggregation ........................................................................................ 60
7.4 Trunk Group Setting ............................................................................................................ 60
7.5 Trunk Distribution Algorithm ............................................................................................... 62
7.6 LACP Setting ...................................................................................................................... 63
7.7 Technical Reference ............................................................................................................ 64
7.7.1 Static Trunking Example ............................................................................................. 64
Chapter 8
VLAN ........................................................................................................................................67
8.1 Overview .............................................................................................................................. 67
8.2 What You Can Do ................................................................................................................ 67
8.3 What You Need to Know ....................................................................................................67
8.3.1 IEEE 802.1Q Tagged VLANs ..................................................................................... 67
8.3.2 Forwarding Tagged and Untagged Frames ................................................................ 68
8.3.3 Common IEEE 802.1Q VLAN terminology ................................................................. 68
8.3.4 Static VLAN ................................................................................................................ 69
8.4 Static VLAN ........................................................................................................................ 70
8.5 Port-based VLAN ............................................................................................................. 71
Chapter 9
Spanning Tree Protocol..........................................................................................................73
9.1 Overview .............................................................................................................................. 73
9.2 What You Can Do ................................................................................................................ 73
9.3 What You Need to Know ......................................................................................................73
9.3.1 STP Terminology ....................................................................................................... 74
9.3.2 How STP Works ........................................................................................................ 74
9.3.3 STP Port States .........................................................................................................74
9.4 STP Global Setting .............................................................................................................. 75
9.5 STP Port Setting .................................................................................................................. 77
Chapter 10
QoS...........................................................................................................................................79
10.1 Overview ........................................................................................................................... 79
10.2 What You Can Do .............................................................................................................. 79
10.3 What You Need to Know .................................................................................................... 80
10.3.1 DiffServ .................................................................................................................... 80
10.3.2 DSCP and Per-Hop Behavior .................................................................................. 80
10.3.3 DiffServ Network Example ...................................................................................... 81
10.4 Port-based Priority ............................................................................................................. 81
10.5 DSCP-to-IEEE 802.1p Priority Settings ............................................................................. 82
10.5.1 DSCP-based Priority ................................................................................................ 83
10.6 Policy-based Priority .......................................................................................................... 83
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Table of Contents
10.6.1 Policy-based Priority - Add/Modify ........................................................................... 85
10.7 Priority to Queue Mapping .................................................................................................86
10.8 Packet Scheduling ............................................................................................................. 87
10.8.1 Strictly Priority Queuing ............................................................................................ 87
10.8.2 Weighted Fair Queuing ............................................................................................ 88
10.8.3 Weighted Round Robin Scheduling (WRR) ............................................................. 88
Chapter 11
Mirroring ..................................................................................................................................91
11.1 Overview ........................................................................................................................... 91
11.2 What You Can Do .............................................................................................................. 91
11.3 Port-based Mirroring .......................................................................................................... 92
11.4 Policy-based Mirroring ....................................................................................................... 93
11.4.1 Policy-based Mirroring - Add/Modify ........................................................................ 93
Chapter 12
SNMP........................................................................................................................................95
12.1 Overview .......................................................................................................................... 95
12.2 What You Can Do .............................................................................................................. 95
12.3 What You Need to Know .................................................................................................... 95
12.3.1 About SNMP ........................................................................................................... 95
12.4 SNMP Setting .................................................................................................................... 97
12.5 SNMPv3 Setting ................................................................................................................ 99
12.6 Technical Reference ........................................................................................................ 103
Chapter 13
Rate Limit...............................................................................................................................107
13.1 Rate Limit Overview ....................................................................................................... 107
13.2 What You Can Do ............................................................................................................ 107
13.3 Rate Limit Summary ........................................................................................................107
13.3.1 Rate Limit Add/Modify ........................................................................................... 108
Chapter 14
Bandwidth Control and Jumbo Frame................................................................................ 111
14.1 Bandwidth Control and Jumbo Frame Overview ............................................................. 111
14.2 What You Can Do ............................................................................................................. 111
14.3 Bandwidth Control ............................................................................................................112
14.4 Jumbo Frame Setting .......................................................................................................113
Chapter 15
Power Over Ethernet ............................................................................................................115
15.1 Power Over Ethernet Overview .......................................................................................115
15.2 What You Can Do .............................................................................................................115
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Table of Contents
15.3 Power Over Ethernet ........................................................................................................116
Part IV: Security ....................................................................................119
Chapter 16
MAC Address ....................................................................................................................... 121
16.1 Overview .......................................................................................................................... 121
16.2 What You Can Do ............................................................................................................ 121
16.2.1 MAC Forwarding Table ........................................................................................... 122
16.2.2 Static MAC Address Forwarding ............................................................................ 122
16.3 MAC Forwarding Table .................................................................................................... 123
16.4 Static MAC ....................................................................................................................... 123
16.5 MAC Filtering ................................................................................................................... 124
Chapter 17
802.1x.....................................................................................................................................127
17.1 Overview ......................................................................................................................... 127
17.2 What You Can Do ............................................................................................................ 127
17.3 What You Need to Know .................................................................................................. 128
17.3.1 IEEE 802.1x Authentication ................................................................................... 128
17.4 Port Authentication Configuration .................................................................................... 128
17.5 802.1x Setting .............................................................................................................. 129
17.6 802.1x Port Setting ...................................................................................................... 130
Chapter 18
Dynamic ARP ........................................................................................................................131
18.1 ARP Table Overview ........................................................................................................131
18.2 What You Can Do ............................................................................................................ 131
18.3 What You Need to Know .................................................................................................. 131
18.3.1 ARP Table Entries .................................................................................................. 132
18.3.2 How Dynamic ARP Works ..................................................................................... 132
18.3.3 ARP Inspection Overview ...................................................................................... 132
18.3.4 MAC-IP Binding ...................................................................................................... 133
18.4 Dynamic ARP Setting ...................................................................................................... 133
18.5 Dynamic ARP VLAN Setting ............................................................................................ 134
18.6 MAC-IP Binding Config .................................................................................................... 135
Chapter 19
Storm Control........................................................................................................................137
19.1 Overview ......................................................................................................................... 137
19.2 What You Can Do ............................................................................................................ 137
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Table of Contents
19.3 Storm Control Setting ...................................................................................................... 138
Chapter 20
Defence Engine.....................................................................................................................139
20.1 Overview ......................................................................................................................... 139
20.2 What You Can Do ............................................................................................................ 139
20.3 Activating Defence Engine .............................................................................................. 139
Part V: Monitoring and Tools .............................................................. 141
Chapter 21
Monitoring ............................................................................................................................. 143
21.1 Overview .......................................................................................................................... 143
21.2 What You Can Do ............................................................................................................ 143
21.3 Logging Setting ............................................................................................................... 143
21.4 Logging Viewing .............................................................................................................. 145
21.5 Port Statistics ................................................................................................................... 147
Chapter 22
Tools....................................................................................................................................... 149
22.1 Overview .......................................................................................................................... 149
22.2 What You Can Do ............................................................................................................ 149
22.3 TFTP ................................................................................................................................ 149
22.4 Reset ............................................................................................................................... 151
22.5 Reboot ............................................................................................................................. 151
Part VI: Troubleshooting & Product Specifications.......................... 155
Chapter 23
Troubleshooting....................................................................................................................157
23.1 Power, Hardware Connections, and LEDs ...................................................................... 157
23.2 Switch Access and Login ................................................................................................. 158
Chapter 24
Product Specifications.........................................................................................................161
Part VII: Appendices and Index .......................................................... 167
Appendix A Changing a Fuse ..............................................................................................169
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Table of Contents
Appendix B Common Services.............................................................................................171
Appendix C Legal Information ..............................................................................................175
Index.......................................................................................................................................179
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Table of Contents
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GS1500-24P User’s Guide
PART I
Introduction and
Hardware
Getting to Know Your Switch (21)
Hardware Installation and Connection
(27)
Hardware Panels (31)
19
20
CHAPTER 1
Getting to Know Your Switch
1.1 Introduction
This chapter introduces the main features and applications of the Switch.
The Switch is a web managed switch with Layer 2 functions. The Switch has
twenty-four 10/100/1000 Mbps Ethernet ports each with Power-Over-Ethernet
(PoE) function. It also has four GbE dual personality interfaces with each interface
comprising one mini-GBIC slot and one 100/1000 Mbps RJ-45 port, with either
port or slot active at a time.
With its built-in web configurator, managing and configuring the Switch is easy. In
addition, the Switch can also be managed via Telnet, or third-party SNMP
management.
See Chapter 24 on page 161 for a full list of software features available on the
Switch.
This section shows a few examples of using the Switch in various network
environments.
1.1.1 Backbone 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 and servers directly to the
Switch’s port or connect other switches to the Switch.
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Chapter 1 Getting to Know Your Switch
In this example, all computers can share high-speed applications on the server. To
expand the network, simply add more networking devices such as switches,
routers, computers, print servers etc.
Figure 1 Backbone Application
1.1.2 Bridging Example
In this example, the Switch connects different company departments (RD and
Sales) 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
super-fast uplink connection by using a Gigabit Ethernet/mini-GBIC port on the
Switch.
Moreover, the Switch eases supervision and maintenance by allowing network
managers to centralize multiple servers at a single location.
Figure 2 Bridging Application
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GS1500-24P User’s Guide
Chapter 1 Getting to Know Your Switch
1.1.3 High Performance Switching Example
The Switch is ideal for connecting two networks that need high bandwidth. In the
following example, use trunking to connect these two networks.
Switching to higher-speed LANs such as ATM (Asynchronous Transmission Mode)
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 Switch can provide the same bandwidth as 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.
Figure 3 High Performance Switched Workgroup Application
1.1.4 IEEE 802.1Q VLAN Application Examples
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.
For more information on VLANs, refer to Chapter 8 on page 67.
1.1.4.1 Tag-based VLAN Example
Ports in the same VLAN group share the same frame 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 recabling.
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Chapter 1 Getting to Know Your Switch
Shared resources such as a server can be used by all ports in the same VLAN as
the server. In the following figure only ports that need access to the server need
to be part of VLAN 1. Ports can belong to other VLAN groups too.
Figure 4 Shared Server Using VLAN Example
1.2 Ways to Manage the Switch
Use any of the following methods to manage the Switch.
• Web Configurator. This is recommended for everyday management of the Switch
using a (supported) web browser. See Chapter 4 on page 39.
• TFTP. Use TFTP for firmware upgrades and configuration backup/restore. See
Chapter 22 on page 149.
• SNMP. The Switch can be monitored by an SNMP manager. See Chapter 12 on
page 95.
1.3 Good Habits for Managing the Switch
Do the following things regularly to make the Switch more secure and to manage
the Switch more effectively.
• Change the password. Use a password that’s not easy to guess and that consists
of different types of characters, such as numbers and letters.
• Write down the password and put it in a safe place.
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GS1500-24P User’s Guide
Chapter 1 Getting to Know Your Switch
• Back up the configuration (and make sure you know how to restore it).
Restoring an earlier working configuration may be useful if the device becomes
unstable or even crashes. If you forget your password, you will have to reset the
Switch to its factory default settings. If you backed up an earlier configuration
file, you would not have to totally re-configure the Switch. You could simply
restore your last configuration.
GS1500-24P User’s Guide
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Chapter 1 Getting to Know Your Switch
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GS1500-24P User’s Guide
CHAPTER 2
Hardware Installation and
Connection
2.1 Installation Scenarios
This chapter shows you how to install and connect the Switch.
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.
Note: 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.
2.2 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.
2.3 Mounting the Switch on a Rack
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.
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Chapter 2 Hardware Installation and Connection
2.3.1 Rack-mounted Installation Requirements
• Two mounting brackets.
• Eight M3 flat head screws and a #2 Philips screwdriver.
• Four M5 flat head screws and a #2 Philips screwdriver.
Failure to use the proper screws may damage the unit.
2.3.1.1 Precautions
• Make sure the rack will safely support the combined weight of all the equipment
it contains.
• Make sure the position of the Switch does not make the rack unstable or topheavy. Take all necessary precautions to anchor the rack securely before
installing the unit.
2.3.2 Attaching the Mounting Brackets to the Switch
1 Position a mounting bracket on one side of the Switch, lining up the four screw
holes on the bracket with the screw holes on the side of the Switch.
Figure 5 Attaching the Mounting Brackets
2 Using a #2 Philips screwdriver, install the M3 flat head screws through the
mounting bracket holes into the Switch.
3 Repeat steps 1 and 2 to install the second mounting bracket on the other side of
the Switch.
4 You may now mount the Switch on a rack. Proceed to the next section.
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Chapter 2 Hardware Installation and Connection
2.3.3 Mounting the Switch on a Rack
1 Position a mounting bracket (that is already attached to the Switch) on one side of
the rack, lining up the two screw holes on the bracket with the screw holes on the
side of the rack.
Figure 6 Mounting the Switch on a Rack
2 Using a #2 Philips screwdriver, install the M5 flat head screws through the
mounting bracket holes into the rack.
3 Repeat steps 1 and 2 to attach the second mounting bracket on the other side of
the rack.
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Chapter 2 Hardware Installation and Connection
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