D-Link DES-5024 User Manual
DES-5024 Fast Ethernet Switching
System
User’s Guide
Rev. 01 (January, 1999)
651DES32.K15
Printed In Taiwan
RECYCLABLE
i
Copyright © 1999 by D-Link Systems, Inc. All rights reserved.
D-Link Limited Warranty
Hardware:
D-Link warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the
following periods measured from date of purchase from D-Link or its authorized Reseller:
Product Type Warranty Period
Complete Products One year
Spare parts and spare kits 90 days
Your dealer, or your nearest D-Link office, can advise whether a longer period of warranty applies to your purchase, and if so, can provide
you a separate certificate of supplemental warranty.
The one-year period of warranty on complete products (or such longer period of warranty as may be offered as to your purchase) applies
on condition that the product’s Registration Card is filled out and returned to a D-Link office within ninety (90) days of purchase. A list of DLink offices is provided at the back of this manual, together with a copy of the Registration Card. Failing such timely registration of
purchase, the warranty period shall be limited to ninety (90) days.
If the product proves defective within the applicable warranty period, D-Link will provide repair or replacement of the product. D-Link shall
have the sole discretion whether to repair or replace, and replacement product may be new or reconditioned. Replacement product shall be
of equivalent or better specifications, relative to the defective product, but need not be identical. Any product or part repaired by D-Link
pursuant to this warranty shall have a warranty period of not less than 90 days, from date of such repair, irrespective of any earlier
expiration of original warranty period. When D-Link provides replacement, then the defective product becomes the property of D-Link.
Warranty service may be obtained by contacting a D-Link office within the applicable warranty period, and requesting a Return Material
Authorization (RMA) number. If a Registration Card for the product in question has not been returned to D-Link, then a proof of purchase
(such as a copy of the dated purchase invoice) must be provided. If handling of warranty correction is required under special
circumstances, you may request special procedure at the time of requesting an RMA number.
After an RMA number is issued, the defective product must be packaged securely in the original or other suitable shipping package to
ensure that it will not be damaged in transit, and the RMA number must be prominently marked on the outside of the package. The package
must be mailed or otherwise shipped to D-Link with all costs of mailing/shipping/insurance prepaid: D-Link will ordinarily reimburse for
mailing/shipping/insurance expenses incurred for return of defective product in accordance with this warranty. D-Link shall never be
responsible for any software, firmware, information, data contained in, stored on or integrated with any product returned to D-Link pursuant
to this warranty.
Any package returned to D-Link without an RMA number will be rejected and shipped back to you at your expense, and D-Link reserves the
right in such case to levy a reasonable handling charge in addition to mailing or shipping costs.
Software:
Warranty service for software products may be obtained by contacting a D-Link office within the applicable warranty
period. A list of D-Link offices is provided at the back of this manual, together with a copy of the Registration Card. If a
Registration Card for the product in question has not been returned to a D-Link office, then a proof of purchase (such as
the dated purchase invoice) must be provided when requesting warranty service. The term “purchase” in this software
warranty refers to the purchase transaction and resulting license to use such software.
D-Link warrants that its software products will perform in substantial conformance with the applicable product
documentation provided by D-Link with such software product, for a period of ninety (90) days from the date of purchase
from D-Link or its Authorized Reseller. D-Link warrants the magnetic media, on which D-Link provides its software
product, against failure during the same warranty period. This warranty applies to purchased software, and to replacement
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software provided by D-Link pursuant to this warranty, but shall not apply to any update or replacement which may be
provided for download via the Internet, or to any update which may otherwise be provided free of charge.
D-Link’s sole obligation under this software warranty shall be to replace any defective software product with product that
substantially conforms to D-Link’s applicable product documentation. You assume responsibility for the selection of
appropriate application and system/platform software and associated reference materials. D-Link makes no warranty that
its software products will work in combination with any hardware, or any application or system platform software product
provided by any third party, except those expressly designated in D-Link’s applicable product documentation as being
compatible. D-Link’s obligation under this warranty shall be a reasonable effort to provide compatibility, but D-Link shall
have no obligation to provide compatibility when there is fault in the third-party hardware or software. D-Link makes no
warranty that operation of its software products will be uninterrupted or absolutely error-free, and no warranty that all
defects in the software product, within or without the scope of D-Link’s applicable product documentation, will be
corrected.
D-Link Offices for Registration and Warranty Service:
The product’s Registration card, provided at the back of this manual, must be sent to a D-Link office. To obtain an RMA number for
warranty service as to a hardware product, or to obtain warranty service as to a software product, contact the D-Link office nearest to you.
D-Link Offices to Contact for Warranty Service:
To mail your Registration Card, or to obtain an RMA number or warranty service, see the following address:
In North, Central, and South America:
D-Link Systems Inc.
53 Discovery Drive, Irvine CA 92618
Tel. (1) 949-788-0805 Fax (1) 949-753-7033
In Europe and Israel:
D-Link Europe
Denmark House, Staples Corner, The Broadway, London NW9 7BW, U.K.
Tel. (44)181-203-9900 Fax (44)181-203-6915
In the Middle East (except Israel), Asia, Oceania and Africa:
D-Link Corporation
No. 233-2, 2nd F. Pao Chiao Road, Hsin Tien Taipei, Taiwan
TEL. (886)2-916-1600
Trademarks
Copyright 1999 D-Link Corporation.
D-Link © is a registered trademark of D-Link Corporation/D-Link Systems, Inc.
All rights reserved, contents may be revised without prior notice.
FlexSWITCHTM is a trademark of D-Link Systems, Inc.
Ethernet is a trademark of Xerox Corporation.
Microsoft Windows is a trademark of Microsoft Corporation.
iii
VT100 is a trademark of Digital Equipment Corporation.
All other trademarks belong to their respective proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation,
transformation, or adaptation without permission from D-Link Corporation/D-Link Systems Inc., as stipulated by the United States Copyright
Act of 1976.
FCC Warning
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
this user’s guide, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be
required to take adequate measures.
iv
Wichtige Sicherheitshinweise
Bitte lesen Sie sich diese Hinweise sorgfältig durch.
Heben Sie diese Anleitung für den spätern Gebrauch auf.
Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine Flüssig- oder Aerosolreiniger. Am besten dient ein
angefeuchtetes Tuch zur Reinigung.
Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden, die vom Hersteller zugelassen sind.
Das Gerät is vor Feuchtigkeit zu schützen.
Bei der Aufstellung des Gerätes ist auf sichern Stand zu achten. Ein Kippen oder Fallen könnte Verletzungen hervorrufen. Verwenden Sie
nur sichere Standorte und beachten Sie die Aufstellhinweise des Herstellers.
Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor Überhitzung schützt. Sorgen Sie dafür, daß diese Öffnungen nicht
abgedeckt werden.
Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
Die Netzanschlußsteckdose muß aus Gründen der elektrischen Sicherheit einen Schutzleiterkontakt haben.
Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollete auch nichts auf der Leitung abgestellt werden.
Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten.
Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz trennen. Somit wird im Falle einer
Überspannung eine Beschädigung vermieden.
Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät gelangen. Dies könnte einen Brand bzw.
Elektrischen Schlag auslösen.
Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur von authorisiertem Servicepersonal geöffnet
werden.
Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einerqualifizierten Servicestelle zu überprüfen:
Netzkabel oder Netzstecker sint beschädigt.
Flüssigkeit ist in das Gerät eingedrungen.
Das Gerät war Feuchtigkeit ausgesetzt.
Wenn das Gerät nicht der Bedienungsanleitung ensprechend funktioniert oder Sie mit Hilfe dieser Anleitung keine Verbesserung erzielen.
Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
Bei Reparaturen dürfen nur Orginalersatzteile bzw. den Orginalteilen entsprechende Teile verwendet werden. Der Einsatz von
ungeeigneten Ersatzteilen kann eine weitere Beschädigung hervorrufen.
Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren Servicepartner. Somit stellen Sie die Betriebssicherheit des
Gerätes sicher.
v
Table of Contents
Table of Contents...........................................................................................................vi
About This Guide ............................................................................................................1
Audience.....................................................................................................................1
Organization................................................................................................................1
1......................................................................................................................................2
Introduction.....................................................................................................................2
Features.......................................................................................................................2
Front Panel..................................................................................................................4
Rear Panel...................................................................................................................5
Management Methods.................................................................................................6
Local Console Management ....................................................................................6
Telnet Management.................................................................................................6
D-View/ SNMP Management..................................................................................6
RMON ....................................................................................................................6
Updating Firmware .....................................................................................................6
2......................................................................................................................................7
Installing the DES-5024..................................................................................................7
Unpacking the DES-5024............................................................................................7
Installation Options.....................................................................................................8
Installing Modules ..................................................................................................... 14
Power On..................................................................................................................17
3....................................................................................................................................18
Connecting the DES-5024 to the Network.....................................................................18
Cable Specifications..................................................................................................18
Copper Cable.........................................................................................................18
Fiber Optic Cable ..................................................................................................20
Ports..........................................................................................................................21
MDI-X Ports .........................................................................................................21
Fiber Optic Ports...................................................................................................21
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RS-232 Port...........................................................................................................21
DES-5024 to DES-5024 Connection..........................................................................22
Connecting the DES-5024 to other Switches and Hubs..............................................22
4....................................................................................................................................23
LEDs.............................................................................................................................23
CPU Module .............................................................................................................24
12-Port 10/100-TX Module.......................................................................................26
2-Port 100BASE-FX Module .................................................................................... 27
1-Port 1000BASE-SX Module ..................................................................................29
5....................................................................................................................................30
Managing the DES-5024...............................................................................................30
Local Console Management......................................................................................31
Telnet........................................................................................................................32
Log In.......................................................................................................................33
Help Message ............................................................................................................ 34
Panel Conventions ..................................................................................................... 35
Console Program.......................................................................................................36
System Configuration............................................................................................36
User Account Management ...................................................................................36
Switch Port 1-8, 9-16, 17-24 and Optional Module Configuration .........................36
100BASE-FX/ 1000BASE-SX Switch Port Module .............................................. 37
Spanning Tree Configuration ................................................................................. 37
SNMP Management Configuration ........................................................................ 37
VLAN Port Management.......................................................................................37
Trunking Port Management...................................................................................37
System Configuration Menu......................................................................................38
System Information Menu.....................................................................................39
System Reset.........................................................................................................41
Factory Reset.........................................................................................................42
System Rate Control .............................................................................................. 44
Software Update Menu..........................................................................................46
User Account Management .......................................................................................49
User Account Change Menu..................................................................................49
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Create New User...................................................................................................50
Delete Users..........................................................................................................52
Change Password ..................................................................................................54
Switch Port Configuration.........................................................................................56
Switch Port Configuration Menu ...........................................................................57
Spanning Tree Configuration.....................................................................................59
STA Operation Levels...........................................................................................59
Spanning Tree Configuration Menu.......................................................................59
SNMP Management Configuration............................................................................62
SNMP Management Configuration Menu..............................................................63
VLAN Port Management...........................................................................................66
VLAN Port Management Menu.............................................................................67
Create New VLAN................................................................................................68
Delete VLAN Menu..............................................................................................70
Trunking Port Management Menu.............................................................................72
Create New Trunking Port.....................................................................................73
Delete Trunking Port.............................................................................................75
6....................................................................................................................................77
Troubleshooting............................................................................................................77
Appendix A...................................................................................................................80
DES-5024 Technical Specifications ..............................................................................80
Switch Specifications ............................................................................................ 80
Port Specifications.................................................................................................80
Index.............................................................................................................................84
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Fast Ethernet Switching System User’s Guide
About This Guide
This section defines the scope of this guide and gives a summary of the contents of each
chapter. It describes the features of the D-Link DES-5024 Fast Ethernet Switching
System. Information about the DES-5024 and other D-Link products is available on our
web site at www.dlink.com.
Audience
This user guide is intended for the networking or computer technician who is installing
the DES-5024 on a network. Refer to other sources for information about networking in
general.
All the information you need to install, configure and troubleshoot the DES-5024 is
contained in this user guide.
Organization
Chapter 1, Introduction, gives a physical and functional overview of the DES-5024. The
DES-5024 features, LEDs, and management methods are covered.
Chapter 2, Installing the DES-5024, covers installing and powering on the DES-5024.
Chapter 3, Connecting the DES-5024 to the Network, covers connecting the DES-5024 to
the network, maximum cable length, cable specifications and connections between
multiple DES-5024s.
Chapter 4, LEDs, covers reading and interpreting the LED panel.
Chapter 5, Managing the DES-5024, covers all the menus and configurations available.
Chapter 6, Troubleshooting, covers troubleshooting the DES-5024.
Appendix A, DES-5024 Technical Specifications, covers the technical specifications of
the DES-5024.
About This Guide
1
Fast Ethernet Switching System User’s Guide
1
Introduction
This chapter gives a physical and functional overview of the DES-5024. The DES-5024
is an intelligent, managed switch, designed for use on medium sized networks as part of
the backbone or for use with other switches and hubs on a larger network.
There are two optional modules available: a 2-Port 100BASE-FX and 1-Port 1000BASESX gigabit module. The modules can only be installed in slot 3. Optional modules can be
ordered at the time of purchase or later.
The chapter is divided into the following sections. Each section briefly describes the
features of the DES-5024. Most of the topics discussed will be explained in greater detail
later in the manual.
The topics covered are:
• Summary of Features
• Modules of the DES-5024
• Explanation of Front and Rear Panels
• Management Methods
• Updating Firmware
Features
The DES-5024 has the following features:
• All 24 TX ports auto-negotiate 10/100 Mbps.
• One half-size slot supporting two optional, installable modules, 2-Port 100BASE-
FX, and 1-Port 1000BASE-SX module.
• The DES-5024 can be configured and customized to your network.
• The DES-5024 can be managed in three ways: Local Console Management,
Telnet and SNMP.
• Supports Cut-through and Store-and-Forward switching.
• Supports Full and Half Duplex for both 10 Mbps and 100 Mbps.
• Eight thousand active MAC address table entries per device with self-learning and
table aging.
• The DES-5024 supports SNMP for RFC 1213, RFC 1757, and RFC 1493.
• VLAN support for eight broadcast domains.
• Port Trunking support for bandwidth aggregation between two DES-5024
switches.
Introduction
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Fast Ethernet Switching System User’s Guide
• Modular chassis that accepts RJ-45, fiber optic and gigabit expansion modules
• Support for RMON statistics through SNMP software.
• The 1000BASE-SX port supports flow control compliant with IEEE 802.3
standard.
Introduction
3
Fast Ethernet Switching System User’s Guide
Slot 1
CPU Module
RS-232 Port
Slot 2
Slot 3
MDI-X Ports
Slot 4
Front Panel
The DES-5024 is designed for management at a glance. The front of the DES-5024,
displayed in Figure 1, has LEDs that give you essential information at a glance.
The DES-5024 is a modular unit. The chassis has five slots. All the modules have LEDs.
See Chapter 4, LEDs, for information on interpreting the LEDs. The slots are in the
following order: CPU module is always on top. Slots one and two are full sized and cme
with two 12-Port 10/100-TX Modules. Slots three and four are half sized and only slot 3
can accommodate feature modules. Slot 4 may not be used.
All ports can be used for network connections. The RS-232 port is used for Out of Band
Management.
All LEDs are located on the front panel of the DES-5024. Their purpose is to allow you
to monitor the operation and performance of the DES-5024 at a glance.
Fiber Optic Ports
Figure 1: DES-5024 Front Panel
4
4
Introduction
4
Fast Ethernet Switching System User’s Guide
Fan
Power On/Off switch
Rear Panel
The three pronged power plug, ventilation fan and the on/off switch are located at the rear
of the DES-5024 displayed in Figure 2. The DES-5024 will work with AC in the range
100-240 VAC, 50-60 Hz. The power requirements are indicated on the rear panel of the
DES-5024. When installing the DES-5024, leave enough room to allow you to plug in the
power cable.
There are heat vents located on the sides. The fans and the vents help to cool the DES-
5024. Always leave two inches of space around the DES-5024 so that air can circulate
and cool the DES-5024.
Figure 2: DES-5024 Rear Panel
Three pronged power plug
Introduction
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Fast Ethernet Switching System User’s Guide
Management Methods
The DES-5024 supports three management methods:
• Local Console Management
• Telnet Management
• D-View/ SNMP Management
Local Console Management
Local Console Management is done through the RS-232 Console port. Managing the
DES-5024 in this mode requires a direct connection between a PC and the DES-5024.
Telnet Management
Telnet is done over the network. Once the DES-5024 is on the network, you can use
Telnet to log in and change the configuration.
D-View/ SNMP Management
The DES-5024 supports SNMP through D-View, D-Link’s proprietary SNMP application
and through other vendors’ SNMP applications. Please refer to the appropriate
documentation for instructions on installing and using D-View and other SNMP
applications.
RMON
The DES-5024 is an RMON agent. RMON statistics can be gathered through SNMP
software. There is no option to gather RMON statistics without using SNMP software.
Updating Firmware
Firmware can be updated quickly and easily. See the section Software Update Menu,
Chapter 5, for instructions on updating firmware.
Introduction
6
Fast Ethernet Switching System User’s Guide
Installing the DES-5024
This chapter covers the following:
• Unpacking the DES-5024
• Installation Options
• Installing Optional Modules
• Powering on the DES-5024
Unpacking the DES-5024
Open the box and carefully unpack the DES-5024. You should have all the items on the
following checklist:
• DES-5024 Fast Ethernet Switching System
• RS-232 DCE serial cable
• Two mounting brackets and eight screws
• Four rubber pads with adhesive backing
• One six foot (1.82 m) power cord
• DES-5024 User’s Guide CD ROM, DES-32/50 V.01 5.25/625M, part #
651DES32.K15.
• Registration Card
2
If any items are missing, contact the retailer where you purchased the DES-5024 for
assistance.
Be sure to register the DES-5024 immediately. Failure to register the DES-5024 may
void the warranty.
Installing the DES-5024
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Fast Ethernet Switching System User’s Guide
Installation Options
There are two options for installing the DES-5024: desktop/ shelf installation or rack
installation.
Follow these guidelines for desktop/ shelf installation or rack installation:
• The surface must support 18 lbs or 8 kg.
• The power source must be within six feet (1.82 m)
• Power cord and cables should never be stretched
• Leave at least two inches (5.08 cm) around the DES-5024 for ventilation
The following tools and materials may be necessary to install the DES-5024:
• Screwdriver to install the brackets as needed
• Wire cutters to cut cable as needed for network connections
• Crimpers to crimp cable as needed
• RJ-45 connectors as needed
• SC fiber optic cable connectors
Refer to Chapter 3, Cable Specifications for cable types and specifications.
Installing the DES-5024
8
Fast Ethernet Switching System User’s Guide
Desktop/ Shelf Installation
The dimensions of the DES-5024 are 17.362 inches (441 mm) x 10.393 inches (264 mm)
x 4.645 inches (118 mm). These measurements include the 8-mm rubber feet provided
with the DES-5024.
Follow these steps to install the DES-5024 on a desktop or shelf:
1. Place the four rubber feet at the corners of the DES-5024. See Figure 3 and Figure 4.
2. Place the DES-5024 on the desktop/shelf.
Figure 3: Install Feet on Bottom
Installing the DES-5024
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Fast Ethernet Switching System User’s Guide
Figure 4: Attach Feet
Installing the DES-5024
10
Fast Ethernet Switching System User’s Guide
Rack Installation
The DES-5024 can be mounted in an EIA standard size, 19-inch rack. The dimensions of
the DES-5024 are 17.362 inches (441 mm) x 10.393 inches (264 mm) x 4.33 inches (110
mm). The DES-5024 can be placed in a wiring closet along with other equipment.
Follow these steps to install the DES-5024 on a rack:
1. Attach a mounting bracket to each side of the DES-5024 with the screws provided.
See Figure 5.
2. Slide the DES-5024 into the rack and use the screws provided to secure the DES5024 to the rack. See Figure 6.
3. Connect the power cord and verify that the DES-5024 is receiving adequate power.
Installing the DES-5024
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Fast Ethernet Switching System User’s Guide
Figure 5: Attach Mounting Brackets
Installing the DES-5024
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Fast Ethernet Switching System User’s Guide
Figure 6: Insert into Rack
Installing the DES-5024
13
Fast Ethernet Switching System User’s Guide
Installing Modules
The process for installing both optional modules is the same. You cannot change the
position of the CPU module. The DES-5024 will not work unless the CPU module is
installed in the CPU slot.
You can purchase optional modules separately in order to meet the needs of your
network. The two optional modules available for the DES-5024 are: a 2-Port 100BASEFX (fiber optic) module and a 1-Port 1000BASE-SX (gigabit) module. As shown in
Figure 7, optional modules can only be installed in Slot 3. Nothing can be installed in slot
4. The procedure for installing modules is the same for all both modules.
Follow these steps to install an optional module:
1. Power the DES-5024 off before installing the optional module. The optional modules
are not hot swappable.
2. Remove the blank bracket, as shown in Figure 7, and set aside. Grasp the
thumbscrews on the sides of the blank bracket and turn counterclockwise to unscrew
them. You can also use a Phillips screwdriver to unscrew the blank bracket. Do not
discard the blank bracket. Put the blank bracket back in if you remove the optional
module.
3. Install the optional module by inserting it into the guide, see Figure 8, and sliding it in
until it stops. Press in firmly until you feel the optional module snap into place. The
optional module should be level and flush with the rest of the DES-5024. Never force,
twist or bend the module. The optional module slides in smoothly.
4. Gently push the thumbscrews in and turn clockwise to tighten. Do not over tighten
the thumbscrews.
5. Power the DES-5024 on after you have installed the optional module. The DES-5024
will auto detect the optional module.
6. Remove the dust cover from the transceiver and plug the cable in.
7. Check the LEDs to verify that there is a link and a proper connection at the port.
See the Troubleshooting section if the optional module is not working properly.
Installing the DES-5024
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Fast Ethernet Switching System User’s Guide
Figure 7: Remove Blank Bracket
Installing the DES-5024
15
Fast Ethernet Switching System User’s Guide
Figure 8: Insert Optional Module
Installing the DES-5024
16
Fast Ethernet Switching System User’s Guide
Power On
The power supply will adjust to the local power source automatically. The DES-5024
may be plugged in without having any or with all LAN segment cables connected.
The power plug is located at the rear of the DES-5024. Plug the cable into the wall socket
and plug the other end into the DES-5024. There is a power on/ off switch located at the
rear of the DES-5024. Move the switch to the on position to power the DES-5024 on. The
Power LED will light and all ports will auto negotiate the proper speed and duplex mode
when the DES-5024 is powered on.
Reboot the DES-5024 if there is a problem. Contact D-Link Systems, Inc. for technical
support.
Check the configuration of the DES-5024 after a power failure but do not reset unless it is
necessary.
The DES-5024 can be used with power sources in the range 100 to 240 VAC., 50 to 60
Hz.
Installing the DES-5024
17
Fast Ethernet Switching System User’s Guide
Connecting the DES-5024 to the
Network
This chapter covers the following:
• Cable Specifications
• Ports
• Connecting the DES-5024 to another DES-5024
• Connecting the DES-5024 to other switches and hubs
This section deals with making cables and connecting the DES-5024 to other devices. It
is extremely important that cables have the correct pin arrangement and that the proper
cables be used when connecting to servers, switches, hubs, workstations and other
devices.
3
Cable Specifications
Use the following guidelines when handling cables:
• Do not stretch or bend cables.
• Do not put copper cables near sources of electromagnetic interference. Fiber optic
cables are immune to electromagnetic interference.
• Do not create trip hazards by laying cables in aisles and walkways.
• Secure cables to the floor when routing in aisles or walkways.
Do not use telephone cable. Telephone cable does not support Ethernet or Fast Ethernet.
Copper Cable
In order for Ethernet or Fast Ethernet to work the wires must be arranged correctly inside
the RJ-45 connector. The most common problem on Ethernet or Fast Ethernet networks is
the cable. If you migrate from Ethernet to Fast Ethernet, make sure the cables are pinned
out properly.
There are two types of cables: straight through and crossover. Category 3, 4, or 5
UTP/STP cable has eight wires inside the sheath. The wires form four pairs. Straight
through cable has the same pin out, inside the RJ-45 connector, at both ends. Crossover
cable has a different pin arrangement at each end. Fast Ethernet does not tolerate
incorrect pin arrangements. You must use the correct pin arrangement in order for the
DES-5024 to work properly. See Figure 9 for an example of straight through and
crossover cable.
The type of cable you use depends on the speed of your network. A network running at
10 Mbps can use lower grade cable than a network running at 100 Mbps., Table 1: Cable
Specifications, shows the cable requirements for Ethernet and Fast Ethernet networks.
Connecting the DES-5024 to the Network
18
Fast Ethernet Switching System User’s Guide
Table 1: Cable Specifications for Copper Connection
Ethernet Type Cable Requirements Maximum Length
10BASE-T
100BASE-TX Category 5 UTP or STP 328 ft (100 M)
Category 3, 4, or 5 UTP or
STP
328 ft (100 M)
Figure 9: Cable Diagram
Connecting the DES-5024 to the Network
19
Fast Ethernet Switching System User’s Guide
Fiber Optic Cable
Data can travel much farther over fiber optic cable than over Category 3, 4 or 5 cable.
Cable length can be up to 1.25 miles (two kilometers) in full duplex and 1350 feet (412
meters) in half duplex transmitting at 100 Mbps.
Fiber optic cables connected to the fiber expansion module for 100 Mbps must meet the
following specifications to carry 1300 nm wavelength for the specified distance:
• Multi-mode cable ISO/IEC 793-2 type B1 and ITU-T G.652 standards
• Cable must have SC connectors
Fiber optic cables attached to the gigabit expansion module must meet the following
specifications to carry 850 nm wavelength for the specified distance:
• Multi-mode cable ISO/IEC 793-2 type B1 and ITU-T G.652 standards
• Cable must have SC connectors
Gigabit traffic can travel the following distances using the specified cable:
• 62.5 um cable 720 feet (220 meters)
• 50 um cables 1639 feet (500 meters)
Connecting the DES-5024 to the Network
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