Olicom CrossFire 8720 User manual

Installation Guide
CrossFire™ 8720
Fast Ethernet Layer 3 Switch
DOC-7037/v.1.00.02

CrossFireTM 8720
Fast Ethernet Layer 3 Switch
Installation Guide

ii
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800
Trademarks
GoCard and the Olicom clasped hands logo are registered trademarks of Olicom A/S. CellDriver,
ClearServer, ClearSession, ClearSight, CrossFire, LANscout, PowerMACH, RapidFire and RapidLAN
are trademarks of Olicom A/S. ClearCare, ClearPartner, ClearStep and ExpertWatch are service marks
of Olicom A/S. Olicom is a registered trademark. Other brand and product names are trademarks,
registered trademarks, service marks or registered service marks of their respective holders.
Copyrights
Olicom A/S reserves the right to modify the information given in this publication without prior notice.
The warranty terms and conditions applicable for your purchase of this equipment are given at the time
of purchase. Please consult your place of purchase for details.
Publication: DOC-7037 v.1.00.02
Part Number: 710001800
© Copyright Olicom A/S, Denmark, June 1999
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, without the prior written permission of the publisher.
FCC Compliance
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 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.
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.
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, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Declaration of Conformity
We Olicom A/S
Nybrovej 114
DK-2800 Lyngby
Denmark
declare under our sole responsibility that the product
CrossFire 8720 Fast Ethernet Layer 3 Switch
to which this declaration relates is in conformity with the following standards or other normative
documents
EN 50082-1
EN 55022
EN 60950 including Amendments
EN 60825-1
following the provisions of 89/336/EEC Directive and 73/23/EEC Directive.
Product Warranty
This product is covered by a limited lifetime warranty. See Appendix C, Warranty Conditions for details.

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800
Modifications
If the device is changed or modified without the express approval of Olicom A/S the user may void his
or her authority to operate the equipment.
Safety Notices
➽Danger: To avoid shock hazard, do not connect or disconnect any cables or perform installation,
maintenance, or reconfiguring of the CrossFire 8720 Fast Ethernet Layer 3 Switch during an electrical
storm.
➽Danger: To avoid the possibility of electrical shock, switch power off and unplug the power cord from
the outlet before detaching the power cord from the CrossFire 8720 Fast Ethernet Layer 3 Switch.
➽Danger: Do not open the CrossFire 8720 Fast Ethernet Layer 3 Switch. Dangerous voltages inside.
➽Danger: To avoid shock hazard the power cord must be connected to a properly wired and grounded
receptacle. Any equipment to which the CrossFire 8720 Fast Ethernet Layer 3 Switch will be attached
must also be connected to properly wired and grounded receptacles.
➽Caution: Observe the following power cable considerations before you begin installation of the
CrossFire 8720 Fast Ethernet Layer 3 Switch.
1. The socket outlet must be installed near the equipment and must be easily accessible.
2. To prevent electrical shock, the power cord set used must comply with national regulations.
2a. The female receptacle of the cord must meet CEE-22 requirements.
2b. The cord must be UL listed, CSA labelled, and consist of three conductors with a maximum
of 15 feet in length.
Type SVT or SJT cord sets must be used for units which stand on a desk or table. Type SJT
cord sets must be used for units which stand on floor.
2c. The male plug for units operating at 115 VAC must consist of a parallel blade, grounding
type attachment plug rated 15 A, 125 VAC.
The male plug for units operating at 230 VAC must consist of a tandem blade, grounding
type attachment plug rated 15 A, 250 VAC.
The male plug for units operating at 230 VAC (outside of the United States and Canada) must
consist of a grounding type attachment plug rated 15 A, 250 VAC and have the appropriate
safety approvals for the country in which the equipment will be installed.
➽Caution: Support the while you are installing the unit to avoid dropping it on the floor or any equipment
beneath it in the rack. The CrossFire 8720 Fast Ethernet Layer 3 Switch unit weighs approximately 8.8
kg (19.4 lbs).
➽Warning:All RJ45 connectors must only be connected to safety extra low voltage (SELV) circuits like
local area networking (LAN).

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800
Table of Contents
1. Introduction 1
1.1 About the Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Front Panel Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2.1 Connectors and Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2.2 Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Rear Panel Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3.1 Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Default Settings for the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Installation 7
2.1 Preparing for Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Safety Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.3 Cabling Rules to Remember . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.1 Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.2 Unpacking and Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 Other Materials You Will Need. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.4 Installing a Universal Expansion Module . . . . . . . . . . . . . . . . . . . . 12
2.2.5 Mounting Hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.6 Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.7 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Switch Access for Management 17
3.1 Selecting Management Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Using Web-Based Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.1 Choosing a Browser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.2 Connecting a Management Station . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.3 To Start a Web Management Session. . . . . . . . . . . . . . . . . . . . . . 18
3.2.4 Web-Browser Interface Description . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Statistics Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 Help and Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.5 How to End a Web Management Session . . . . . . . . . . . . . . . . . . . . . . . 23
3.6 Using the Console Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.6.1 Connecting a Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.6.2 How to Start a Console Session . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.6.3 Console Management Features. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.7 Selecting a Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.8 Entering Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.9 Error Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.10 Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.11 How to End a Console Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800
4. Troubleshooting 29
4.1 Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Using LEDs for Diagnosing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3 Hardware Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.1 Testing the Switch by Resetting It . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4 Checking Console Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.4.1 Testing Switch-to-Device Network Communications. . . . . . . . . . . 33
4.4.2 Testing End-to-End Network Communications . . . . . . . . . . . . . . . 33
4.4.3 Restoring the Factory Default Configuration . . . . . . . . . . . . . . . . . 33
Appendix A. Cable and PIN Information 35
A.1 Cable and Pin Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A.1.1Out-of-Band Management Port and Cable Pin-Outs . . . . . . . . . . . 35
A.2 Management Port Pin-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
A.3 EIA 232 Modem Cable Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . 37
A.4 EIA 232 Null-Modem Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
A.4.1Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . . . . . 39
A.4.2Fiber-Optic Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.4.3Cabling Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Appendix B. Getting in Touch with Technical Support 43
B.1 Before You Contact Olicom Technical Support. . . . . . . . . . . . . . . . . . . 43
B.2 Hotline Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
B.3 Fax Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
B.4 Internet E-Mail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
B.5 Anonymous Internet FTP Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
B.6 Internet World Wide Web Server (WWW). . . . . . . . . . . . . . . . . . . . . . . 44
B.7 Olicom Support WEB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
B.8 Problem Report Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Appendix C. Warranty Conditions 47
C.1 Standard Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
C.2 Limited Lifetime Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800
Illustrations
Figure 1. CrossFire 8720 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. CrossFire 8720 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 3. Connecting Devices to Ethernet Ports . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4. Connecting Using Building Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 5. Login Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6. Web Management Applet Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 7. Sample Web-Browser Interface Layout . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8. Device Panel in Toggle and Select Mode . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9. Sample Unpinned Statistics Screen . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 10. Sample Error Message on the Status Line . . . . . . . . . . . . . . . . . . . . 22
Figure 11. Straight-through Modem Cable DB 25-DB 9 . . . . . . . . . . . . . . . . . . . 37
Figure 12. Straight-through Modem Cable DB 9-DB 9 . . . . . . . . . . . . . . . . . . . . 37
Figure 13. EIA 232 Null-Modem Cable DB-25 for 25-pin Connector . . . . . . . . . 38
Figure 14. EIA 232 Null-Modem Cable DB-9 for 9-pin Connector . . . . . . . . . . . 38
Figure 15. Twisted-Pair Cable Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 16. Twisted-Pair Straight-Through Cable . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 17. Twisted-Pair Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Tables
Table 1. Textual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Table 2. Front Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 3. Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 4. CrossFire 8720 Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 5. Default Switch Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 6. CLI Editing Keystrokes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 7. Front Panel LEDs Abnormal States. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 8. Pin-out of the DB-9 Management Port. . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 9. Maximum Cable Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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CrossFire8720 Fast Ethernet Layer 3 Switch, v.1.00.02, P/N:710001800
About This Guide
This installation guidecontains the information neededto install and get started
with the CrossFireTM 8720Fast Ethernet Layer 3Switch. Throughout this guide it
will be referred to as the “CrossFire 8720 Switch”.
The guide is intended to be used by network administrators or knowledgeable
users,therefore it assumes a basic knowledge of Local Area Networks and IP
routing principles.
In addition to this installation guide, the CrossFire 8720 Switch is delivered with
the on-lineCrossFire 8720 Fast Ethernet Layer 3 Switch Reference Guide
enclosed as a PDF file on a CD-ROM. The CD-ROM also contains an on-line
version of this installation guide. When you need information outside the scope of
the installation guide, please refer to the reference guide.
Textual Conventions
Table 1. Textual Conventions
❏
Convention Example
Console commands are written in Courier console command
Menu items are indicated by bold Statistics
Options are identified by brackets and delimited by “|” (option1 |option2)
Text to be substituted is enclosed by < ><text>
References to other sections or documents are in italics italics
Key entries are shown in Helvetica narrow
ESCEnter
Screendisplay is shownin Couriernormal andbold display
Hexadecimal notation may be indicated with an “h” D0000h
End of a chapter is indicated with ❏❏

viii
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800

1
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
1. Introduction
1.1 About the Switch
The following tables list and describe the connectors, switches and status LEDs on
the CrossFire 8720 Switch.
1.2 Front Panel Details
Figure 1 illustrates the front panel. Components (12) and (13) are expansion slot
covers that you must remove before you can install any optional expansion
module. For further instructions on installing expansion modules, see the UEM
Quick Reference Guide that comes with each module.
Figure 1. CrossFire 8720 Front Panel
1.2.1 Connectors and Push Buttons
Table 2. Front Panel Connectors
# Name Description
9 Ports 1 to 16 UTP 10 Base-T/100 Base-TX Ethernet ports with RJ-45
jacks.
8 Management Console connection with DB-9 connector.
7 Reset Press this button to start a full system reset of the
software and hardware.
6 Default Press this button to reset all non-volatile configuration
settings to the original, factory default values and to
start a full system reset of the software and hardware.
1
4
5
3
6
2
9
8711
10 12
13

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
1.2.2 Status LEDs
Table 3. Front Panel LEDs
# LED State Meaning
2 Status Off The switch is not connected to a power
outlet, or the power supply is faulty.
On The switch is receiving power.
Flashing The switch is initializing.
1 ClearSession Off ClearSession is disabled.
On ClearSession is enabled.
Flashing ClearSession is recovering.
3 Fault Off When the switch is powered on this
indicates normal operation.
On The Fault LED is off during normal
operation. If the LED turns on, an error has
occurred. Power the switch down and up
again. The Fault LED should not turn on
again.
Flashing Indicates self test upon the switch
initialisation.
4 PSU1 On The power supply unit 1 operates properly.
Off The power supply unit 1 does not function.
5 PSU2 Off The power supply unit 2 operates properly.
On The power supply unit 2 does not function.
10 Lnk
(at each port) On A port is on the network.
Off A port is not connected to the network.
11 Act
(at each port) On or blinking Data is being transmitted on or received from a port.

3
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
1.3 Rear Panel Details
The rear panel is shown in figure 2.
Figure 2. CrossFire 8720 Rear Panel
1.3.1 Rear Panel Connectors
Table 4. CrossFire 8720 Rear Panel Connectors
# Name Description
1 AC connection Standard AC power connection.
2 PSU1 Power supply unit number 1.
3 PSU2 Power supply unit number 2.
4 Fan tray Tray containing cooling fans.
AC DC
~LINE50/ 60Hz , 100 - 250VAC,3.5A
MANUAL " GUI DE TO OPERATIONS"
PLEASE RE FER TOTHEI NSTRUCTION
FORSE LECTIONOFPOWERCORDSET
POWERCORDS BE FOREANY S ERVI CING
SUPPLYUNITS.TOREDUCET HE RI SK OF
ELECTRICSHOCK, DISCONNECT THETWO
DONOT CONNECTT HEPOWER CORDTO
THEPOWER S UPPLY MODULE UNLESS THE
DONOT CONNECTT HEPOWER CORD
UNLESSALL OPENINGSARE CLOSED
CAUTI ON!
BY BLI NDPANELS
WARNING!
THECHASSISMAY HAVE TWOPOWER
MAYONLY BE REMOVEDBY
POWERS UPPLY COVER
HIGHVOLTAGES
AUTHORI Z ED PE RSONNEL
WARNING!
MODULE I S I NSTALLEDINTHECHASSIS
CF8729 POWER SUPPLY
3214

4
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
1.4 Default Settings for the Switch
The factory switch settings should be sufficient for layer-2 connectivity in most
configurations. If you are going to employ the switch’s layer 3 functionality,
however, you must configure IP subnets and possibly RIP routing before you start
using the switch.
The most important default settings are listed in table 5:
Feature Default Value
IP Management Access
IP configuration IP address: 192.0.2.1
IP mask: 255.255.255.0
Configured on default subnet (VLAN)
SNMP communities Public: RO
Private: RW
Addresses unrestricted
Authentication traps On
Trap receivers None
Console / Serial Link Access
Serial link settings Speed 9600 baud rate
RTS/CTS handshake: On
No modem initialization string
Enable inband Telnet to console Enabled
Enable web-browser interface access Enabled
Enable console access Enabled
Console call-back Off
Management access passwords None

5
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
System Parameters
System information Blank system name/contact/location
Address age interval 300s
System date/time Not set
Switch reboot Run image number 1
Built-in test active
Port configuration options All ports up
Auto speed/duplex/flow control
CrossLinks None
Broadcast throttling 30% of total output traffic
Port mirroring Off
Spanning Tree
Instances Single instance created on default
VLAN
Enable/disable Globally enabled (enabled on all ports)
Spanning Tree parameters Bridge priority: 32768
Hello time: 2s
Maximum age: 20s
Forwarding delay: 15s
Port priority: 128
VLANs
Enable/disable VLANs Default VLAN (Vid=1) active
VLAN port assignment All ports belong to Default VLAN
Q-tagging off
Feature Default Value

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Introduction
Table 5. Default Switch Parameters
❏
IP configuration
IP address and mask Only default subnet (VLAN) is
assigned IP address and mask
(192.0.2.1, 255.255.255.0)
limited broadcasts BOOTP requests allowed; in order to
function require helper addresses to be
defined on input subnets.
directed broadcasts Enabled on subnets
proxy ARP option Enabled on subnets
RIP Globally disabled (disabled on default
VLAN and on each newly created
VLAN)
Feature Default Value

7
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Installation
2. Installation
2.1 Preparing for Installation
Read this section carefully before installing the CrossFire 8720 Switch.
2.1.1 Safety Recommendations
Follow these guidelines to ensure general safety during and after the installation:
•Keep the chassis area clear and dust-free during and after installation.
•Keep tools away from walk areas where you and others could trip over them.
•Do not wear loose clothing that could get caught in the chassis. Fasten your tie
or scarf and roll up your sleeves.
•Wear safety glasses when working under any conditions that might be
hazardous to your eyes.
•Do not perform any action that creates a potential hazard to people or makes
the equipment unsafe.
Safety with Electricity
Follow these guidelines when working on equipment powered by electricity.
➽Warning: Before working on equipment that is connected to power lines, remove
jewelry (including rings, necklaces, bracelets and watches). Metal objects will
heat up when connected to power and ground and can cause serious burns or weld
the metal object to the terminals.
➽Warning: Do not work on the system or connect or disconnect cables during
periods of lightning activity. Read the installation instructions before you connect
the system to its power source. To turn power off on the CrossFire 8720 Switch,
you must disconnect the power cord; there is no on/off switch.
Locate the emergency power-off switch for the room in which you are working.
Then, if an electrical accident occurs, you can act quickly to turn off the power.
•Before working on the system, unplug the power cord.
•Disconnect all power before doing the following:
–Installing or removing a chassis.
–Working near power supplies.
–Performing a hardware upgrade.

8
CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Installation
•Do not work alone if potentially hazardous conditions exist.
•Never assume that power is disconnected from a circuit. Always check.
•Look carefully for possible hazards in your work area, such as moist floors,
ungrounded power extension cables, and missing safety grounds.
•If an electrical accident occurs, proceed as follows:
–Use caution; do not become a victim yourself.
–Unplug the power cord(s).
–If possible, send another person to get medical aid. Otherwise, assess
the condition of the victim and then call for help.
–Determine if the person needs rescue breathing or external cardiac
compressions; then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical
circuitry. It occurs when electronic components are improperly handled and can
result in complete or intermittent failures. Always follow ESD-prevention
procedures when removing and replacing components. Ensure that the chassis is
electrically connected to ground using an ESD mat or a ground wire. Wear an
ESD-preventive wrist strap, ensuring that it makes good skin contact. To safely
channel unwanted ESD voltages to ground, connect the clip to an unpainted
surface of the chassis frame. To properly guard against ESD damage and shocks,
the wrist strap and cord must operate effectively. If no wrist strap is available,
ground yourself by touching the metal part of the chassis.
➽Caution: For safety, periodically check the resistance value of the antistatic strap,
which should be between 1 and 10 MW.
2.1.2 Site Requirements
This section specifies the site requirements for installation.
Environment
Choose a clean, dust-free, preferably air-conditioned location. Avoid direct
sunlight, heat sources, and areas with high levels of EMI (electromagnetic
interference).
Chassis Accessibility
Make sure the front and back panels of the switch are accessible so that you can
monitor the LED indicators and access the control switches. Leaving enough
clearance at the front and back will also make cabling and service easier.

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Installation
Cooling and Airflow
The fan tray, which is located at the right side of the switch, cools the interior by
drawing air through vents on the left side and forcing heated air out through holes.
➽Note: The fan tray is hot-swappable.
➽Caution: To protect the equipment from overheating, do not operate it in an area
that exceeds the maximum recommended ambient temperature of 40×C (104×F).
To prevent airflow restriction, you must allow at least 7.6 cm (3") of clearance
around chassis openings.
Power
The source electrical outlet should be installed near the switch, be easily
accessible, and be properly grounded.
➽Note: Observe the following power cable considerations before you begin
installation of the CrossFire 8720 Switch.
1. The socket outlet must be installed near the equipment and must be easily
accessible.
2. To prevent electrical shock, the power cord set used must comply with national
regulations.
–The female receptacle of the cord must meet CEE-22 requirements.
The cord must be UL listed, CSA labelled, and consist of three conductors
with a maximum of 15 feet in length. Type SVT or SJT cord sets must be
used for units which stand on a desk or table. Type SJT cord sets must be
used for units which stand on floor.
–The male plug for units operating at 115 VAC must consist of a parallel
blade, grounding type attachment plug rated 15 A, 125 VAC.
The male plug for units operating at 230 VAC must consist of a tandem
blade, grounding type attachment plug rated 15 A, 250 VAC.
The male plug for units operating at 230 VAC (outside of the United States
and Canada) must consist of a grounding type attachment plug rated 15 A,
250 VAC and have the appropriate safety approvals for the country in
which the equipment will be installed.
➽Caution: Support the CrossFire 8720 Switch while you are installing the unit to
avoid dropping it on the floor or any equipment beneath it in the rack. The
CrossFire 8720 Switch unit including dual power supply units weighs
approximately 10.7 kg (23.6 lbs).
➽Caution: To separate the switch from the power, pull the power cord completely
out from the socket. The power socket must be easily accessible and located near
the unit.

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Installation
➽Warning: This product relies on the building’s installation for short-circuit
(overcurrent) protection. Ensure that a fuse or circuit breaker no larger than
120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors
(all current-carrying conductors).
➽Warning: A voltage mismatch can cause equipment damage and may pose a fire
hazard. If the voltage indicated on the label is different from the power outlet
voltage, do not connect the chassis to that receptacle.
➽Note: Power supply units CrossFire-8729 are hot-swappable.
2.1.3 Cabling Rules to Remember
This section will help you understand the physical configuration restrictions for
the CrossFire 8720 Switch. In brief, you must remember the following rules when
planning to install the switch:
•For shared-media LAN segments, acceptable distances are defined by the hub
or concentrator attached to the switch port.
•Use cross-over cables for connecting between switch ports.
•Use straight-through cables for connecting end-stations and switch ports.
•If you create parallel paths directly between switches, be sure that you have
either use them as CrossLinks or verify that the Spanning Tree protocol is
enabled on that ports (see CrossLinks and Spanning Tree sections in the
Olicom CrossFire 8720 Fast Ethernet Layer 3 Switch Reference Guide). Note
that the Spanning Tree protocol is globally enabled by default.
Cables and Distances Between Devices
For specific information on supported cable types, cable lengths and connector
pinouts, see appendix A, Cable and PIN Information.

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CrossFire 8720 Fast Ethernet Layer 3 Switch, v. 1.00.02, P/N: 710001800 Installation
2.2 Installation
This chapter contains step-by-step instructions for installing, connecting and
verifying that the switch is operating properly.
2.2.1 Installation Summary
The installation sequence is listed in the steps below.
1. Plan for installation. Read Preparing for Installation on page 7.
2. Unpack the switch.
3. Gather materials.
4. If you will be installing expansion modules, install them now.
5. Mount the switch.
6. Connect the switch to the network.
7. Verify the operation of the switch.
8. Configure the switch.
2.2.2 Unpacking and Inspecting
Immediately after receiving the equipment, examine all shipping containers and
contents for damage. If any damage has occurred, notify the shipping carrier.
Unpack the unit by removing the packing material and lifting it from its protective
enclosures. Visually examine the equipment and check the container for related
parts and accessories. You should have the following items:
•One CrossFire 8720 Fast Ethernet Switch.
•One CrossFire 8720 Fast Ethernet Layer 3 Switch Guide to Operations (this
guide).
•One OC-8720 Fast Ethernet Switch Program Disk Set.
•One serial cable for the management port.
•One plastic bag containing four adhesive rubber feet and rack mounting
screws, Allen key, nuts and washers.
Report any missing parts and any damage not related to shipping to your customer
service representative.
➽Note: Keep the packing materials for future use. All components returned under
warranty should be shipped in their original packing materials.