3Com Switch 3C17204 User Manual

®
SuperStack 3  
Switch 4400  
Getting Started Guide  
3C17203  
3C17204  
Part No. DUA1720-3AAA02  
Published August 2001  
 
ABOUT THIS GUIDE  
Related Documentation  
9
LEDs 15  
Switch 4400 Rear View Detail 17  
Power Socket 17  
Package Contents 20  
Choosing a Suitable Site 20  
Rack-mounting 21  
Placing Units On Top of Each Other 22  
Stacking Units 22  
The Power-up Sequence 23  
Powering-up the Switch 4400 23  
 
PC-AT Serial Cable 57  
RJ-45 Pin Assignments 58  
(24-port) 61  
Switch 4400  
Online Technical Services 65  
World Wide Web Site 65  
3Com FTP Site 66  
Support from Your Network Supplier 66  
Returning Products for Repair 68  
INDEX  
REGULATORY NOTICES  
 
 
ABOUT THIS GUIDE  
This guide provides all the information you need to install and use a  
SuperStack® 3 Switch 4400 in its default state.  
This guide is intended for use with both Switch 4400 models:  
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3C17203 — 24 10BASE-T/100BASE-TX ports  
3C17204 — 48 10BASE-T/100BASE-TX ports  
All procedures described in this guide apply to both models.  
The guide is intended for use by network administrators who are  
responsible for installing and setting up network equipment;  
consequently, it assumes a basic working knowledge of LANs (Local Area  
Networks).  
If the information in the release notes that are shipped with your product  
differ from the information in this guide, follow the instructions in the  
release notes.  
Most user guides and release notes are available in Adobe Acrobat  
Reader Portable Document Format (PDF) or HTML on the 3Com  
World Wide Web site:  
 
 
8
ABOUT THIS GUIDE  
Conventions  
Table 1 and Table 2 list conventions that are used throughout this guide.  
Table 1 Notice Icons  
Icon  
Notice Type  
Description  
Information note Information that describes important features or  
instructions  
Caution  
Information that alerts you to potential loss of data or  
potential damage to an application, system, or device  
Warning  
Information that alerts you to potential personal injury  
Table 2 Text Conventions  
Convention Description  
Screen displays This typeface represents information as it appears on the  
screen.  
Syntax  
The word syntaxmeans that you must evaluate the syntax  
provided and then supply the appropriate values for the  
placeholders that appear in angle brackets. Example:  
To change your password, use the following syntax:  
system password <password>  
In this example, you must supply a password for <password>.  
Commands  
The word commandmeans that you must enter the  
command exactly as shown and then press Return or Enter.  
Commands appear in bold. Example:  
To display port information, enter the following command:  
bridge port detail  
The words enter”  
and type”  
When you see the word enterin this guide, you must type  
something, and then press Return or Enter. Do not press  
Return or Enter when an instruction simply says type.”  
Keyboard key names If you must press two or more keys simultaneously, the key  
names are linked with a plus sign (+). Example:  
Press Ctrl+Alt+Del  
Words in italics  
Italics are used to:  
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Emphasize a point.  
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Denote a new term at the place where it is defined in the  
text.  
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Identify menu names, menu commands, and software  
button names. Examples:  
From the Help menu, select Contents.  
Click OK.  
 
         
Related Documentation  
9
Related  
Documentation  
In addition to this guide, each Switch documentation set includes the  
following:  
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SuperStack 3 Switch Implementation Guide  
This guide contains information on the features supported by your  
Switch and how they can be used to optimize your network.  
SuperStack 3 Switch Management Quick Reference Guide  
This guide contains a summary of the web interface and command  
line interface commands for the Switch.  
SuperStack 3 Switch Management Interface Reference Guide  
This guide provides detailed information about the web interface and  
command line interface that enable you to manage the Switch. It is  
supplied in HTML format on the CD-ROM that accompanies the  
Switch.  
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Release Notes  
These notes provide information about the current software release,  
including new features, modifications, and known problems.  
There are other publications you may find useful, such as:  
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Documentation accompanying the Advanced Redundant Power  
system.  
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Documentation accompanying the Expansion Modules.  
Documentation accompanying 3Com Network Supervisor. This is  
supplied on the CD-ROM that accompanies the Switch.  
Accessing Online The CD-ROM supplied with your Switch contains the following online  
Documentation documentation:  
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SuperStack 3 Switch Implementation Guide (PDF format)  
SuperStack 3 Switch Management Interface Reference Guide (HTML  
format)  
1 To access the documentation insert the CD-ROM into your CD-ROM  
drive. If your PC has auto-run enabled, a splash screen will be displayed  
automatically.  
2 Select the Documentation section from the contents page.  
 
     
10  
ABOUT THIS GUIDE  
If the online documentation is to be accessed from a local drive or server,  
you will need to access the CD-ROM contents via the root directory and  
copy the files from the CD-ROM to a suitable directory.  
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The HTML Reference Guide is stored in the Docs/reference directory  
on the CD-ROM. The documentation is accessed using the  
contents.htm file.  
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The PDF Implementation Guide is stored in the  
Docs/implementationdirectory of the CD-ROM.  
3Com recommends that you copy the Docs/reference directory as a  
whole to maintain the structure of the files.  
Product  
Registration  
You can register your SuperStack 3 Switch 4400 on the 3Com Web site:  
Documentation  
Comments  
Your suggestions are very important to us. They will help make our  
documentation more useful to you. Please e-mail comments about this  
document to 3Com at:  
Please include the following information when commenting:  
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Document title  
Document part number (on the title page)  
Page number (if appropriate)  
Example:  
Part Number DUA 1720-3AAA0x  
SuperStack 3 Switch 4400 Getting Started Guide  
Page 21  
 
   
INTRODUCING THE  
SUPERSTACK 3 SWITCH 4400  
1
This chapter contains introductory information about the Switch 4400  
and how it can be used in your network. It covers summaries of hardware  
and software features and also the following topics:  
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About the Switch 4400  
Switch 4400 Front View Detail  
Switch 4400 Rear View Detail  
Default Settings  
 
   
12  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4400  
About the Switch  
4400  
The Switch 4400 is a stackable 10/100 Mbps device and provides  
high-performance work groups with a backbone to server connection.  
The Switch 4400 allows Cascade, Gigabit Ethernet or Fast Ethernet Fiber  
connections when expansion modules are installed in the expansion slots  
on the rear of the unit. You can also add the Switch 4400 to any  
SuperStack® system as your network grows.  
Summary of Table 3 summarizes the hardware features that are supported by the  
Hardware Features Switch 4400.  
Table 3 Hardware features  
Feature  
Switch 4400  
Addresses  
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Up to 8000 supported  
Up to 64 permanent entries  
Supported on all ports  
Auto MDI/MDI-X  
Auto-negotiation  
Forwarding Modes  
Duplex Modes  
Store and Forward  
Half and full duplex on all front panel ports  
In full duplex operation all ports are supported  
Supported on all ports  
Flow Control  
Smart Auto-sensing  
Traffic Prioritization  
Supported (IEEE 802.ID): 4 queues per port  
Ethernet and Fast Ethernet Auto-negotiating 10BASE-T/100BASE-TX ports  
Ports  
RPS Support  
Connects to SuperStack 3 Advanced Redundant  
Power System (ARPS) (3C16071B)  
Mounting  
19-inch rack or stand-alone mounting  
 
       
About the Switch 4400  
13  
Summary of Software Table 4 summarizes the software features that are supported by the  
Features Switch 4400.  
Table 4 Software features  
Feature  
Switch 4400  
Automatic IP  
Configuration  
Supported  
Resilient Links  
Supported  
Aggregated Links  
Supported stack-wide  
Broadcast Storm Control Supported  
Virtual LANs (VLANs)  
Support for up to 60 VLANs using the IEEE 802.1Q  
standard  
Multicast Filtering  
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128 Multicast filter groups supported  
IGMP filtering supported  
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Spanning Tree Protocol  
(802.1D-1998)  
Supported  
Roving Analysis Port  
Supported  
Supported  
Rapid Spanning Tree  
Protocol (802.1w)  
Webcache Support  
Quality of Service (QoS)  
RMON  
Supported  
Supported  
Four groups supported: Statistics, History, Alarms,  
Event  
Email Notification of  
Events  
Supported  
Management  
Web interface, command line interface, and SNMP  
supported  
Port Security  
Disconnect Unauthorized Device (DUD) supported  
For information about managing the software features of the Switch,  
refer to the SuperStack 3 Switch Management Interface Reference  
Guideon the CD-ROM that accompanies the Switch.  
 
     
14  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4400  
Switch 4400  
Front View Detail  
Figure 1 Switch 4400 (24-port) front view  
Figure 2 Switch 4400 (48-port) front view  
WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot  
be used as standard traditional telephone sockets, or to connect the unit to a  
traditional PBX or public telephone network. Only connect RJ-45 data  
connectors, network telephony systems, or network telephones to these  
sockets.  
Either shielded or unshielded data cables with shielded or unshielded  
jacks can be connected to these data sockets.  
 
 
Switch 4400 Front View Detail  
15  
10BASE-T/ The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports  
100BASE-TX Ports configured as Auto MDIX (cross-over). These ports automatically provide  
ports to 10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half  
duplex or 100BASE-TX full duplex. The maximum segment length is  
100 m (328 ft) over Category 5 twisted pair cable.  
LEDs Table 5 lists LEDs visible on the front of the Switch, and how to read their  
status according to color. For information on using the LEDs for problem  
solving, see Solving Problems Indicated by LEDson page 46.  
Table 5 LED behavior  
LED  
Color  
Indicates  
Port Status LEDs  
Packet Green  
Full duplex packets are being transmitted/received on the  
port.  
Yellow  
Half duplex packets are being transmitted/received on the  
port.  
Off  
No packets are being transmitted/received on the port.  
Status Green  
A high speed (100 Mbps) link is present, and the port is  
enabled.  
Green flashing A high speed (100 Mbps) link is present, but the port is  
disabled.  
Yellow  
A low speed (10 Mbps) link is present, and the port is  
enabled.  
Yellow flashing A low speed (10 Mbps) link is present, but the port is  
disabled.  
Off  
No link is present.  
Module Packet LEDs  
Green  
Yellow  
Full duplex activity being received or transmitted  
Half duplex activity being received or transmitted  
No activity  
Off  
Module Status LEDs  
Green  
The Module is installed and supported. The Link Status has  
been determined, and the port is enabled.  
Green flashing The Module is installed and supported. The Link Status has  
been determined, but the port is disabled.  
(continued)  
 
       
16  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4400  
LED  
Color  
Indicates  
Yellow  
The Module is installed and supported. The Link status has  
not been determined or there is no Link for a single port  
Module.  
Yellow flashing A Module is installed, however, it is not supported.  
Off  
Unit LEDs  
18 Green  
The Module is not installed.  
When the Switch forms a stack with other Switch 4400  
units, the LED indicates the position of the unit in the stack  
and that a link is present.  
When the Switch is stand-alone and not part of a stack, LED  
1 is on.  
Green rotating When a software upgrade is in progress, the Unit LEDs of the  
unit that is being upgraded flash on and off in the following  
sequence —  
1,2,4,6,8,7,5,3 (24-port)  
1,2,3,4,8,7,6,5 (48-port)  
Green flashing The Switch physically forms a stack with other Switch 4400  
units, but cannot be managed as part of that stack until all  
units have been upgraded to software version 2.0 or later.  
Off  
A fault has occurred.  
Power/Self Test LED  
Green  
The Switch is powered-up and operating normally.  
Green flashing The Switch is either downloading software or is initializing  
(which includes running a Power On Self Test).  
Yellow  
Off  
The Switch has failed its Power On Self Test.  
The Switch is not receiving power or there is a fault with the  
Power Supply Unit.  
 
Switch 4400 Rear View Detail  
17  
Switch 4400 Rear  
View Detail  
Figure 3 Switch 4400 rear view  
Power Socket The Switch automatically adjusts its power setting to any supply voltage  
in the range 90-260 VAC.  
Redundant Power To protect against internal power supply failure, you can use this socket  
System Socket to connect a Switch 4400 to a SuperStack 3 Advanced Redundant Power  
System (RPS). See Connecting a Redundant Power Systemon page 24.  
Console Port The console port allows you to connect a terminal and perform remote or  
local out-of-band management. The console port uses a standard null  
modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop  
bit.  
Expansion Module You can use these slots to install Expansion Modules. These allow the  
Slots Switch to support various forms of connection and add extra functionality  
to your Switch. Contact your supplier for more information.  
WARNING: When an Expansion Module is not installed, ensure the  
blanking plate is fitted by tightening all screws with a suitable tool.  
 
                   
18  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4400  
Default Settings  
Table 6 shows the default settings for the Switch 4400:  
Table 6 Default Settings  
Feature  
Switch 4400  
Automatic IP Configuration  
Port Status  
Enabled  
Enabled  
Port Speed  
10/100 Mbps ports are auto-negotiated  
Duplex Mode  
All fixed 10BASE-T and 100BASE-TX ports are  
auto-negotiated  
Flow Control  
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Enabled in half duplex  
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Auto-negotiated in full duplex  
Broadcast Storm Control  
Virtual LANs (VLANs)  
Enabled  
All ports belong to the untagged Default VLAN  
(VLAN 1) with 802.1Q learning operational  
IP Multicast Filtering  
Filtering enabled  
Rapid Spanning Tree Protocol Enabled  
Fast Start:  
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Enabled on front panel ports  
Disabled on rear panel port  
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RMON Alarm  
Enabled  
Enabled  
Disabled  
Smart Auto-Sensing  
Webcache Support  
Quality of Service (QoS)  
All ports prioritize NBX VoIP traffic (LAN and IP).  
All ports set to best effortfor all other traffic.  
If you initialize a Switch unit by selecting System > Control > Initialize in  
the Web interface or by entering system control initialize in  
the Command Line Interface, the following settings are retained to allow  
you to connect to and manage the Switch:  
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IP Address  
Subnet Mask  
Default Router  
 
     
INSTALLING THE SWITCH  
2
This chapter contains the information you need to install and set up the  
Switch 4400. It covers the following topics:  
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Package Contents  
Choosing a Suitable Site  
Rack-mounting  
Placing Units On Top of Each Other  
The Power-up Sequence  
WARNING: Safety Information. Before installing or removing any  
components from the Switch 4400 or carrying out any maintenance  
procedures, you must read the safety information provided in Appendix A  
of this guide.  
AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever  
tout composant du Switch 4400 ou d'entamer une procédure de  
maintenance, lisez les informations relatives à la sécurité qui se trouvent  
dans l'Appendice A de ce guide.  
VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus  
dem Switch 4400 entfernen oder dem Switch 4400 hinzufuegen oder  
Instandhaltungsarbeiten verrichten, lesen Sie die Sicherheitsanweisungen,  
die in Appendix A (Anhang A) in diesem Handbuch aufgefuehrt sind.  
 
     
20  
CHAPTER 2: INSTALLING THE SWITCH  
Package Contents  
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Switch 4400 (24-port) (3C17203) or Switch 4400 (48-port) (3C17204)  
CD-ROM  
Getting Started Guide (this guide)  
Implementation Guide  
Management Quick Reference Guide  
Release Notes  
Unit Information Labels  
Warranty Information  
Power Cord  
2 x Mounting brackets  
4 x Screws  
4 x Rubber feet  
Choosing a Suitable  
Site  
The Switch is suited for use on a desktop, either free standing or  
mounted in a standard 19-inch equipment rack. Alternatively, the Switch  
can be mounted in a wiring closet or equipment room, as an aggregator  
for other Hubs and Switches. A rack-mounting kit containing two  
mounting brackets is supplied with the Switch.  
CAUTION: Ensure that the ventilation holes are not obstructed.  
When deciding where to position the Switch, ensure that:  
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Cabling is located away from:  
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sources of electrical noise such as radios, transmitters and  
broadband amplifiers.  
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power lines and fluorescent lighting fixtures  
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The Switch is accessible and cables can be connected easily.  
Water or moisture cannot enter the case of the Switch.  
Air-flow is not restricted around the Switch or through the vents in the  
side of the Switch. 3Com recommends that you provide a minimum of  
25mm (1in.) clearance.  
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Air flow around the Switch does not exceed 40 °C (104 °F).  
 
     
Rack-mounting  
21  
If the Switch is installed in a 19-inch rack or closed assembly its local air  
temperature may be greater than room ambient temperature.  
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The air is as free from dust as possible.  
The unit is installed in a clean, air conditioned environment.  
No more than eight Switch units are placed on top of one another, if  
the units are free-standing.  
Rack-mounting  
The Switch 4400 is 1U high and will fit in most standard 19-inch racks.  
CAUTION: Disconnect all cables from the Switch before continuing.  
Remove all self adhesive pads from the underside of the Switch if they  
have been fitted.  
To rack-mount your Switch:  
1 Place the Switch the right way up on a hard flat surface, with the front  
facing towards you.  
2 Locate a mounting bracket over the mounting holes on one side of the  
Switch, as shown in Figure 3.  
Figure 4 Fitting a bracket for rack-mounting  
3 Insert the two screws and tighten with a suitable screwdriver.  
 
   
22  
CHAPTER 2: INSTALLING THE SWITCH  
You must use the screws supplied with the mounting brackets. Damage  
caused to the unit by using incorrect screws invalidates your warranty.  
4 Repeat steps 2 and 3 for the other side of the Switch.  
5 Insert the Switch into the 19-inch rack and secure with suitable screws  
(not provided). Ensure that ventilation holes are not obstructed.  
6 Connect network cabling.  
7 Finally place a unit information label on the unit in an easily accessible  
position. The unit information label shows the following:  
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The 3Com product name of the Switch  
The 3Com 3C number of the Switch  
The unique MAC address (Ethernet address) of the Switch  
The serial number of the Switch  
You may need this information for fault reporting purposes.  
Placing Units On  
Top of Each Other  
If the Switch units are free-standing, up to eight units can be placed one  
on top of the other. If you are mixing a variety of SuperStack® 3 Switch  
and Hub units, the smaller units must be positioned at the top.  
If you are placing Switch units one on top of the other, you must use the  
self-adhesive rubber pads supplied. Apply the pads to the underside of  
each Switch, sticking one in the marked area at each corner. Place the  
Switch units on top of each other, ensuring that the pads of the upper  
unit line up with the recesses of the lower unit.  
Stacking Units  
Switch 4400 units can be stacked together and then treated as a single  
manageable unit with one IP address. Any combination of 24-port and  
48-port units is allowed in a single stack, as long as the total number of  
front panel ports does not exceed the limit of 192 ports. The following  
combinations are allowed:  
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4 x 48-port Switches  
3 x 48-port Switches and 2 x 24-port Switches  
2 x 48-port Switches and 4 x 24-port Switches  
1 x 48-port Switch and 6 x 24-port Switches  
8 x 24-port Switches  
 
               
The Power-up Sequence  
23  
Using the Expansion Module slot at the rear of the Switch, you can stack  
Switch units together in two ways:  
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The SuperStack 3 Switch Cascade Stacking Kit (3C17227) consists of  
two Cascade Modules and a Cascade Cable. This kit allows you to  
connect two Switch 4400 units together.  
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The SuperStack 3 Cascade Extender Kit (3C17228) consists of one  
Cascade Module, one Cascade Cable and one Cascade Extender Unit.  
This kit allows you to connect any of the combinations of Switch 4400  
units shown in Stacking Unitson page 22. Each Cascade Extender  
Kit enables you to add one additional Switch to your stack.  
For more information contact your supplier, and refer to the user  
documentation that accompanies these Cascade Kits.  
When the Switch 4400s are stacked together they are assigned a unit  
number from bottom-to-top for management purposes. When further  
switches are added to the stack, they can be positioned at the bottom of  
the stack or at the top. Either way, the Switch management software will  
re-order the Switch unit numbers into a logical order again (from bottom  
to top).  
The Power-up  
Sequence  
The following sections describe how to get your Switch 4400  
powered-up and ready for operation.  
Powering-up the Use the following sequence of steps to power-up the Switch.  
Switch 4400  
1 Plug the power cord into the power socket at the rear of the Switch.  
2 Plug the other end of the power cord into your power outlet.  
The Switch powers-up and runs through its Power On Self Test (POST),  
which takes approximately 10 seconds.  
Checking for Correct During the Power On Self Test, all ports on the Switch are disabled and  
Operation of LEDs the LEDs light in a set sequence.  
When the POST has completed, check the Power/Self Test LED to make  
sure that your Switch is operating correctly. Table 7 shows possible colors  
for the LED.  
 
               
24  
CHAPTER 2: INSTALLING THE SWITCH  
Table 7 Power/Self Test LED colors  
Color  
State  
Green  
The Switch is powered-up and  
operating normally.  
Yellow  
Off  
The Switch has failed its Power On Self  
Test. This occurs if any of the ports fail  
during power-up.  
The Switch is not receiving power.  
If there is evidence of a problem, see Solving Problems Indicated by  
LEDson page 46.  
Connecting a You can connect a SuperStack 3 Advanced Redundant Power System  
Redundant Power (3C16071B) to the Switch. This unit, which is also known as an RPS, is  
System designed to maintain the power to your Switch if a power supply failure  
occurs.  
For normal redundancy, the unit requires one Type 2A Power Module  
(part number 3C16074A). For full redundancy, the unit requires two type  
2A Power Modules combined using a Type 2 Y-Cable.  
CAUTION The Switch has no ON/OFF switch; the only method of  
connecting or disconnecting mains power is by connecting or  
disconnecting the power cord.  
CAUTION: The Switch can only use a SuperStack Advanced Redundant  
Power System output.  
Choosing the Correct All of the ports on the front of the Switch 4400 are Auto-MDIX, that is  
Cables they have a cross-over capability. The port can automatically detect  
whether it needs to operate in MDI or MDIX mode. Therefore you can  
make a connection to a port with a straight-through (MDI) or a cross-over  
cable (MDIX).  
The Auto-MDIX feature only operates when auto-negotiation is enabled.  
If auto-negotiation is disabled, all the Switch ports are configured as  
MDIX (cross-over). If you want to make a connection to another MDIX  
port, you need an automatic cross-over cable. Many ports on  
workstations and servers are configured as MDI (straight-through). If you  
 
             
The Power-up Sequence  
25  
want to make a connection to an MDI port, you need to use a standard  
straight-through cable. See Table 8.  
3Com recommends that you use Category 5 twisted pair cable the  
maximum segment length for this type of cable is 100 m (328 ft).  
Table 8 Cables required to connect the Switch 4400 to other devices if  
auto-negotiation is disabled  
Cross-over Cable  
Straight-through Cable  
Switch to Switch  
(MDIX to MDIX)  
Switch to Hub  
(MDIX to MDIX)  
Switch to PC (NIC)  
(MDIX to MDI)  
 
 
26  
CHAPTER 2: INSTALLING THE SWITCH  
 
SETTING UP FOR MANAGEMENT  
3
Your Switch can operate in its default state, that is, you can install it and  
it will work straight away (plug-and-play). However, to make full use of  
the features offered by the Switch, and to change and monitor the way it  
works, you have to access the management software that resides on the  
Switch. This is known as managing the Switch.  
Managing the Switch can help you to improve the efficiency of the  
Switch and therefore the overall performance of your network.  
This chapter explains the initial set up of the Switch and the different  
methods of accessing the management software to manage a Switch. It  
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Setting Up Overview  
Initial Switch Setup  
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Manual Setup  
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Automatic Setup  
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Methods of Managing a Switch  
Setting Up Command Line Interface Management  
Setting Up Web Interface Management  
Setting Up SNMP Management  
Default Users and Passwords  
 
       
28  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Setting Up  
Overview  
This section gives an overview of what you need to do to get your Switch  
set up and ready for management when it is in its default state. Detailed  
procedural steps are contained in the sections that follow. In brief, you  
need to:  
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Configure IP information for your Switch by completing initial Switch  
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Prepare for your chosen method of management  
CAUTION: To protect your Switch from unauthorized access, you must  
change all default passwords as soon as possible, even if you do not  
intend to actively manage your Switch. For more information on default  
users and changing default passwords, see Default Users and  
Passwordson page 44.  
IP Configuration You can use one of the following methods to allocate IP information to  
your Switch (essential if you wish to manage your Switch across the  
network).  
Manual IP Configuration  
You can choose to configure the IP information yourself. The Switch  
remembers the information that you enter until you change it again or  
set the configuration method to Automatic.  
You should use the Manual IP configuration method if:  
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you do not have a DHCP or BootP server on your network, or  
you want to remove the risk of the IP address ever changing, or  
it is not possible to configure the DHCP or BootP server to allocate  
static IP addresses (this is necessary to ensure that the Switch is always  
allocated the same IP address).  
For most installations, 3Com recommends that you configure the Switch  
manually. This makes management simpler and more reliable as it is not  
dependent on a DHCP or BootP server, and eliminates the risk of the IP  
address changing.  
If you wish to manually enter IP information for your Switch, work  
through the Manual Setupsection on page 31 and connect to a front  
panel port or the console port to manually configure the IP information.  
 
       
Setting Up Overview  
29  
Automatic IP Configuration  
By default the Switch tries to configure itself with IP information without  
requesting user intervention. It tries to obtain an IP address from a DHCP  
or BootP server on the network.  
If neither server is found, the Switch will configure itself with an IP  
address in the range 169.254.1.0 to 169.254.254.255. This is known as  
Auto-IP and is the same mechanism used by Windows 98 and Windows  
2000. IP addresses configured by Auto-IP are temporary as they cannot  
be routed but are useful for small networks which are not connected to  
other networks, or for initial configuration.  
However, as soon as a DHCP or BootP server is detected, the Switch will  
configure itself with the IP address allocated by that server.  
When using automatic IP configuration it is important that the IP address  
of the Switch is static, otherwise you will not know what the IP address is  
and it will be difficult to manage. Most DHCP and BootP servers allow  
static IP addresses to be configured so that you know what IP address will  
be allocated to the Switch. Refer to the documentation that accompanies  
your DHCP/BootP server.  
For a detailed description of how automatic IP configuration operates,  
please refer to the Implementation Guide that accompanies your Switch.  
You should use the automatic IP configuration method if:  
I
your network uses DHCP or BootP to allocate IP addresses, or  
I
flexibility is needed. If the Switch is re-deployed onto a different  
subnet, it will automatically reconfigure itself with an appropriate IP  
address, instead of you having to manually reconfigure the Switch.  
If you use the automatic IP configuration method, you need to view the  
automatically allocated IP information before you can begin  
management. Work through the Automatic Setupsection on page 36  
and use 3Com Network Supervisor or connect to the console port to  
discover the automatically allocated IP information.  
 
30  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Preparing for Once your Switchs initial set up is complete you can set up your chosen  
Management management method as described in Methods of Managing a Switch”  
on page 39.  
For detailed information about the specific web interface operations and  
command line interface commands and problem solving, refer to the  
SuperStack 3 Switch Management Interface Reference Guideon the  
CD-ROM that is supplied with the Switch.  
Initial Switch Setup  
Before you begin the initial setup of your Switch, you must first  
determine your preferred setup method. There are two setup methods:  
I
Manual Setup You have two choices of how to configure the IP  
information, as shown in Table 9.  
I
Automatic Setup Your Switch must be online, that is, connected to  
a network. You have two choices of how to view the allocated IP  
information, as shown in Table 9.  
Table 9 Initial Switch Setup Methods  
Manual Setup  
Connecting to a front panel Use the web interface to  
Automatic Setup  
Using 3Com Network  
Supervisor  
Use 3Com Network  
Supervisor to detect the  
automatically allocated IP  
information.  
port  
manually enter IP  
information by accessing  
the Switch using its default  
IP address  
169.254.100.100.  
Connecting to the console Use the command line  
port  
Connecting to the console Use the command line  
interface to view the  
interface to manually enter port  
IP information.  
automatically allocated IP  
information.  
 
         
Manual Setup  
31  
Manual Setup  
You can set up a Switch manually in the following ways:  
I
Connecting to a front panel port Connect a workstation using an  
Ethernet cable to a front panel port of the Switch. You can then  
manually enter IP information using the web interface.  
I
Connecting to the console port Connect a workstation using a  
console cable to the console port of the Switch. You can then  
manually enter IP information using the command line interface (CLI).  
Connecting to a Front To set up your Switch manually you can make a connection to a front  
Panel Port panel port. You must do this whilst the Switch is offline, that is, before  
you connect the Switch to a network.  
Pre-requisites  
I
I
I
I
I
A workstation running Windows 95/98/2000 or Windows NT.  
A Network Interface Card (NIC).  
A Category 5 twisted pair Ethernet cable with RJ-45 connectors.  
A suitable Web browser refer to Choosing a Browseron page 42.  
You need to have the following so that you can manually set up the  
Switch with IP information:  
I
I
I
IP address  
subnet mask  
default gateway  
Connecting the Workstation to the Switch  
1 Connect the workstation to a front panel port using an Ethernet cable as  
shown in Figure 5.  
Figure 5 Connecting a workstation to the Switch via a front panel port  
 
         
32  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
To connect the cable:  
a Attach an RJ-45 connector at one end of the Ethernet cable to the  
Network Interface Card (NIC) in the workstation.  
b Connect the RJ-45 connector at the other end of the cable to one of  
the front panel ports on the Switch.  
Configuring the Workstation with IP Information  
You need to change the IP address and subnet mask of the workstation  
that you have connected to the Switch. Make a note of the existing  
settings so you can return to them later. Change the workstation to the  
following settings:  
I
IP address 169.254.100.99  
Subnet mask 255.255.255.0  
I
Setting Up the Switch with IP Information  
You are now ready to manually set up the Switch with IP information  
using the Web interface.  
1 Power-up the Switch. This takes approximately one minute.  
2 Open a suitable Web browser and enter 169.254.100.100in the  
Location Address field. This is the default IP address that is automatically  
assigned to an offline unit.  
If there is no response, wait for one minute then re-enter the default IP  
address.  
3 At the login and password prompts, enter adminas your user name and  
press Return at the password prompt. If you have logged on correctly, a  
set of Getting Started pages are displayed.  
4 The Getting Started pages allow you to enter basic setup information for  
the Switch. Select Manualand then enter the IP address, subnet mask,  
and default gateway that you want the Switch to use when it is  
connected to the network. The final page displays a summary of the  
information entered.  
The initial set up of your Switch is now complete and the Switch is ready  
for you to set up your chosen management method. See Methods of  
Managing a Switchon page 39.  
 
Manual Setup  
33  
Connecting to the To set up your Switch manually you can alternatively make a connection  
Console Port to the console port (this example describes a local connection to the  
console port, rather than a remote one via a modem). You can do this  
whilst the Switch is offline, that is, before you connect the Switch to a  
network, or whilst the Switch is online, that is, connected to a network.  
Pre-requisites  
I
A workstation with terminal emulation software installed, such as  
Microsoft Hyperterminal. This software allows you to communicate  
with the Switch via the console port directly, or through a modem.  
I
I
Documentation supplied with the terminal emulation software.  
A suitable cable:  
I
A standard null modem cable if you are connecting directly to  
the console port, or  
I
A standard modem cable if you are connecting to the console  
port using a modem.  
You can find pin-out diagrams for both cables in Appendix B on page 57.  
I
You need to have the following so that you can manually set up the  
Switch with IP information:  
I
I
I
IP address  
subnet mask  
default gateway  
Connecting the Workstation to the Switch  
1 Connect the workstation to the console port using a standard null  
modem cable as shown in Figure 6.  
Figure 6 Connecting a workstation to the Switch via the console port  
To connect the cable:  
a Attach the female connector on the cable to the male connector on  
the console port of the Switch.  
 
     
34  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
b Tighten the retaining screws on the cable to prevent it from being  
loosened.  
c
Connect the other end of the cable to one of the serial ports (also  
known as a COM port) on your workstation.  
2 Open your terminal emulation software and configure the COM port  
settings to which you have connected the cable. The settings should be  
set to match the default settings for the Switch, which are:  
I
I
I
I
I
19,200 baud  
8 data bits  
no parity  
1 stop bit  
no hardware flow control  
Refer to the documentation that accompanies the terminal emulation  
software for more information.  
Setting Up the Switch with IP Information  
You are now ready to manually set up the Switch with IP information  
using the command line interface.  
1 The command line interface login sequence begins as soon as the Switch  
detects a connection to its console port.  
If the login prompt does not begin immediately, press Return a few times  
until it starts.  
2 At the login and password prompts, enter adminas your user name and  
press Return at the password prompt. If you have logged on correctly, the  
top-level menu of the command line interface is displayed as shown in  
the example in Figure 7.  
 
Manual Setup  
35  
Figure 7 Example top-level command line interface menu  
3 At the Select menu option prompt enter the protocol ip  
prompt enter manual. The screen prompts you to enter IP information.  
4 Enter the IP address, subnet mask, and gateway IP address for the Switch.  
The screen displays a summary of the information entered.  
The initial set up of your Switch is now complete and the Switch is ready  
for you to set up your chosen management method. See Methods of  
Managing a Switchon page 39.  
If you do not intend to use the command line interface via the console  
port to manage the Switch, you can disconnect the serial cable and close  
the terminal emulator software.  
 
 
36  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Automatic Setup  
You can set up the Switch automatically whilst it is connected to a  
network in either of the following ways:  
I
Using 3Com Network Supervisor This application will auto-discover  
the Switch and display the automatically allocated IP information  
assigned to the Switch.  
I
Connecting to the Console Port Connect a workstation using a  
console cable to the console port of the Switch. You can then view the  
IP information automatically assigned to the Switch using the  
command line interface (CLI).  
Using 3Com Network You can use the 3Com Network Supervisor application provided on the  
Supervisor CD-ROM that accompanies your Switch to discover the automatically  
allocated IP information.  
1 Connect your Switch to the network.  
2 Power-up the Switch and wait for two minutes.  
3 Launch 3Com Network Supervisor and run the Auto-discovery wizard.  
3Com Network Supervisor will auto-discover the new Switch and display  
the IP information that has been automatically allocated to the Switch.  
Most DHCP and BootP servers allow static IP addresses to be configured  
so that you know what IP address the Switch will be given. Refer to the  
documentation that accompanies your DHCP or BootP server.  
If your network does not have a DHCP or BootP server, 3Com Network  
Supervisor must be on the same subnet as the Switch, as Auto-IP  
addresses are non-routable.  
Connecting to the To set up your Switch automatically you can alternatively make a  
Console Port connection to the console port. (This example describes a local  
connection to the console port, rather than a remote one via a modem.)  
Pre-requisites  
I
A workstation with terminal emulation software installed, such as  
Microsoft Hyperterminal. This software allows you to communicate  
with the Switch via the console port directly, or through a modem.  
I
Documentation supplied with the terminal emulation software.  
 
           
Automatic Setup  
37  
I
A suitable cable:  
I
A standard null modem cable if you are connecting directly to  
the console port, or  
I
A standard modem cable if you are connecting to the console  
port using a modem.  
You can find pin-out diagrams for both cables in Appendix B on page 57.  
I
A Category 5 twisted pair Ethernet cable with RJ-45 connectors to  
connect your Switch to the network.  
Connecting the Workstation to the Switch  
1 Connect the workstation to the console port using a standard null  
modem cable as shown in Figure 8.  
Figure 8 Connecting a workstation to the Switch via the console port  
To connect the cable:  
a Attach the female connector on the cable to the male connector on  
the console port of the Switch.  
b Tighten the retaining screws on the cable to prevent it from being  
loosened.  
c
Connect the other end of the cable to one of the serial ports (also  
known as a COM port) on your workstation.  
2 Open your terminal emulation software and configure the COM port  
settings to which you have connected the cable. The settings should be  
set to match the default settings for the Switch, which are:  
I
I
I
I
I
19,200 baud  
8 data bits  
no parity  
1 stop bit  
no hardware flow control  
Refer to the documentation that accompanies the terminal emulation  
software for more information.  
 
 
38  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Viewing IP Information via the Console Port  
You are now ready to view the automatically allocated IP information  
using the command line interface.  
1 Connect your Switch to the network using an Ethernet cable. As soon as  
a network connection is made the Switch begins the automatic IP  
configuration process.  
The automatic IP configuration process usually completes within one  
minute.  
If there is no response from a DHCP server within 30 seconds, the Auto-IP  
configuration mechanism attempts to allocate the default IP address  
169.254.100.100. If this address is not available, it then allocates an IP  
address in the range of 169.254.x.y (where x is in the range 1 to 254, and  
y is in the range 0 to 255).  
2 The command line interface login sequence begins as soon as the Switch  
detects a connection to its console port.  
If the login prompt does not begin immediately, press Return a few times  
until it starts.  
3 At the login and password prompts, enter adminas your user name and  
press Return at the password prompt. If you have logged on correctly, the  
top-level menu of the command line interface is displayed as shown in  
the example in Figure 9.  
Figure 9 Example top-level command line interface menu  
4 At the Select menu option prompt enter the protocol ip  
interface summarycommand. At the Select IP interfaces  
prompt enter all. A summary of the automatically allocated IP  
information is displayed. Make a note of the Network IP Address.  
 
 
Methods of Managing a Switch  
39  
The initial set up of your Switch is now complete and the Switch is ready  
for you to set up your chosen management method. See Methods of  
Managing a Switchon page 39.  
If you do not intend to use the command line interface via the console  
port to manage the Switch, you can disconnect the serial cable and close  
the terminal emulator software.  
Methods of  
Managing a Switch  
Once you have completed the initial set up of your Switch, you can  
decide how you wish to manage the Switch. You can use one of the  
following methods:  
I
I
I
Command line interface management  
Web interface management  
SNMP management  
Command Line Each Switch has a command line interface (CLI) that allows you to  
Interface manage the Switch from a workstation, either locally via a console port  
Management connection (see Figure 10), or remotely over the network (see Figure 11).  
Figure 10 CLI management via the console port  
Figure 11 CLI management over the network  
Refer to Setting Up Command Line Interface Managementon  
page 41.  
 
           
40  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Web Interface Each Switch has an internal set of web pages that allow you to manage  
Management the Switch using a Web browser remotely over an IP network (see  
Figure 12).  
Figure 12 Web interface management over the network  
Refer to Setting Up Web Interface Managementon page 42.  
SNMP Management You can manage a Switch using any network management workstation  
running the Simple Network Management Protocol (SNMP) as shown in  
Figure 13. For example, you can use the 3Com Network Supervisor  
software that is provided on the CD-ROM that accompanies your Switch.  
Refer to Setting Up SNMP Managementon page 43.  
 
           
Setting Up Command Line Interface Management  
41  
Setting Up  
This section describes how you can set up command line interface  
management using a local console port connection or over the network.  
Command Line  
Interface  
Management  
CLI Management via To manage a Switch using the command line interface via the local  
the Console Port console port connection:  
1 Ensure you have connected your workstation to the console port correctly  
as described in Connecting to the Console Porton page 33.  
2 Your Switch is now ready to continue being managed and/or configured  
through the CLI via its console port.  
CLI Management over To manage a Switch using the command line interface over a network  
the Network using Telnet:  
1 Ensure you have already set up the Switch with IP information as  
described in Initial Switch Setupon page 30.  
2 Check that you have the IP protocol correctly installed on your  
management workstation. You can check this by trying to browse the  
World Wide Web. If you can browse, the IP protocol is installed.  
3 Check you can communicate with the Switch by entering a ping  
command at the DOS prompt in the following format:  
c:\ ping xxx.xxx.xxx.xxx  
(where xxx.xxx.xxx.xxx is the IP address of the Switch)  
If you get an error message, check that your IP information has been  
entered correctly and the Switch is powered up.  
4 To open a Telnet session via the DOS prompt, enter the IP address of the  
Switch that you wish to manage in the following format:  
>telnet xxx.xxx.xxx.xxx  
(where xxx.xxx.xxx.xxx is the IP address of the Switch)  
If opening a Telnet session via third party software you will need to enter  
the IP address in the format suitable for that software.  
5 At the login and password prompts, enter adminas your user name and  
press Return at the password prompt (or the password of your choice if  
you have already modified the default passwords).  
 
     
42  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
If the login prompt does not display immediately, press Return a few  
times until it starts.  
6 If you have logged on correctly, the top-level menu of the command line  
interface for the Switch you wish to manage is displayed as shown in  
Figure 7 on page 35.  
Setting Up Web  
Interface  
Management  
This section describes how you can set up web interface management  
over the network.  
Pre-requisites  
I
I
I
Ensure you have already set up the Switch with IP information as  
described in Initial Switch Setupon page 30.  
Ensure that the Switch is connected to the network using a Category  
5 twisted pair Ethernet cable with RJ-45 connectors.  
A suitable Web browser.  
Choosing a Browser  
To display the web interface correctly, use one of the following Web  
browsers:  
I
Netscape Navigator® version 4.5, 4.6, or 4.7.  
I
Microsoft Internet Explorer version 4.0, 5.0, or 5.5.  
For the browser to operate the web interface correctly, JavaScriptand  
Cascading Style Sheets must be enabled on your browser. These features  
are enabled on a browser by default. You will only need to enable them if  
you have changed your browser settings.  
Web Management To manage a Switch using the web interface over an IP network:  
Over the Network  
1 Check that you have the IP protocol correctly installed on your  
management workstation. You can check this by trying to browse the  
World Wide Web. If you can browse, the IP protocol is installed.  
2 Check you can communicate with the Switch by entering a ping  
command at the DOS prompt in the following format:  
c:\ ping xxx.xxx.xxx.xxx  
(where xxx.xxx.xxx.xxx is the IP address of the Switch)  
 
           
Setting Up SNMP Management  
43  
If you get an error message, check that your IP information has been  
entered correctly and the Switch is powered up.  
3 Open your web browser and enter the IP address of the Switch that you  
wish to manage in the URL locator, for example, in the following format:  
4 At the login and password prompts, enter adminas your user name and  
press Return at the password prompt (or the password of your choice if  
you have already modified the default passwords).  
5 Click on the Device View button to display the web management options.  
Setting Up SNMP  
Management  
Any network management application running the Simple Network  
Management Protocol (SNMP) can manage a Switch if:  
I
The correct Management Information Bases (MIBs) are installed on the  
management workstation.  
I
The management workstation is connected to the Switch using a port  
in VLAN 1 (the Default VLAN). By default, all ports on the Switch are in  
VLAN 1.  
You can use the 3Com Network Supervisor application that is provided on  
the CD-ROM that accompanies your Switch to provide SNMP  
management for your Switch. If you use 3Com Network Supervisor it  
automatically loads the correct MIBs and necessary files onto your  
workstation.  
Pre-requisites  
I
Documentation supplied with the SNMP network management  
application software.  
To manage your Switch using an SNMP network management  
application, you need to specify SNMP community strings for the users  
defined on the Switch. You can do this using the command line interface  
system management snmp communitycommand refer to the  
command line interface section of the SuperStack 3 Switch  
Management Interface Reference Guidefor more information.  
 
       
44  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Default Users and  
Passwords  
If you intend to manage the Switch using the web interface or the  
command line interface, or to change the default passwords, you need to  
log in with a valid user name and password. The Switch has three default  
user names, and each user name has a different password and level of  
access. These default users are listed in Table 10.  
CAUTION: To protect your Switch from unauthorized access, you must  
change all default passwords as soon as possible, even if you do not  
intend to actively manage your Switch  
Table 10 Default Users  
User  
Name  
Default  
Password Access Level  
monitor  
monitor  
monitor the user can view all manageable parameters,  
except special/security features, but cannot change any  
manageable parameters.  
manager manager  
admin (no  
manager the user can access and change the  
operational parameters but not special/security features  
security the user can access and change all manageable  
password) parameters  
Use the admin default user name (no password) to login and carry out  
initial Switch setup.  
Changing Default You can change the default passwords using either:  
Passwords  
I
The security device user modifycommand on the CLI, or  
The Security > Device > User > Modify operation on the web interface.  
I
For more information about default users and passwords, refer to the  
Superstack 3 Switch Management Interface Reference Guideon the  
Switch CD-ROM.  
 
       
PROBLEM SOLVING  
4
This chapter helps you to diagnose and solve problems you may have  
with the operation of your Switch. There is also an explanation of IP  
addressing.  
The topics covered are:  
I
I
I
Solving Problems Indicated by LEDs  
Solving Hardware Problems  
Solving Communication Problems  
If you experience a problem that is not listed here, it may be included in  
the support section of the Superstack 3 Switch Management Interface  
Reference Guide on the CD-ROM that accompanies your Switch.  
For Technical Support information, see Appendix D.  
 
     
46  
CHAPTER 4: PROBLEM SOLVING  
Solving Problems  
Indicated by LEDs  
If the LEDs on the Switch indicate a problem, refer to the list of suggested  
solutions below.  
The Power LED does not light  
Check that the power cable is firmly connected to the Switch and to the  
supply outlet. If the connection is secure and there is still no power, you  
may have a faulty power cord or an internal fault. Firstly, check the power  
cord by:  
I
testing it in another device  
I
connecting a working power cord to the problemdevice  
then contact your supplier for advice.  
On powering-up, the Power/Self Test LED lights yellow  
The Switch unit has failed its Power On Self Test (POST) because of an  
internal problem. The fault type will be indicated on the unit LEDs.  
Contact your supplier for advice.  
A link is connected and yet the Status LED for the port does not  
light  
Check that:  
I
The Switch and the device at the other end of the link (or cable) are  
connected securely.  
I
I
I
The devices at both ends of the link are powered-up  
The quality of cable is satisfactory  
Auto-negotiation settings are the same at both ends.  
Auto-negotiation problems will occur with 10BASE-T or 100BASE-T  
where auto-negotiation is disabled and incorrect cables are being used  
(cross-over or straight)  
Auto-negotiation problems will occur with fiber if:  
I
The Receiver (RX) and Transceiver (TX) cable connectors are  
swapped  
I
I
Fibers are broken  
Auto-negotiation differs at either end (a link appears at the fixed’  
end and not at the auto-negotiation end)  
 
   
Solving Hardware Problems  
47  
The Unit LED is flashing green  
The Switch unit physically forms a stack with other Switch 4400 units, but  
cannot be managed as part of that stack because one or more units have  
not been upgraded to software version 2.0 or later. You must upgrade  
each unit in the stack to this software version, which is available on the  
CD-ROM that accompanies your Switch.  
Solving Hardware  
Problems  
In the rare event of your Switch unit experiencing a hardware failure,  
refer to the list of suggested solutions below.  
An expansion module is installed and the unit will not power up  
Ensure that the expansion module is fully seated in the slot and the  
connectors are engaged so that the securing screws can be tightened.  
An SNMP fan fail trap is received  
1 Power off the unit.  
2 Check that the air vents are not obstructed.  
3 Power cycle the unit. To do this, remove and reconnect the AC mains  
supply. If the unit has no AC main supply, remove and reconnect the DC  
RPS supply.  
4 If a further fan fail trap is received, return the unit.  
Unit fails, no SNMP fan fail trap is received  
1 Power cycle the unit. To do this, remove and reconnect the AC mains  
supply. If the unit has no AC mains supply, remove and reconnect the DC  
RPS supply.  
2 Check the command line interface (system summary command) to  
determine whether a thermal shutdown has occurred.  
3 If no, return the unit:  
If yes, check that:  
I
The air vents are not obstructed.  
I
The ambient temperatures and environmental conditions meet those  
specified in Appendix C.  
4 Power cycle the unit. If a further thermal shutdown occurs, and all  
environmental conditions are satisfactory, return the unit to 3Com.  
 
   
48  
CHAPTER 4: PROBLEM SOLVING  
Solving  
If you experience communication problems with the Switch, ensure that:  
Communication  
Problems  
I
The Switch IP address has been configured as described in Chapter 3.  
I
If the Switch is separated from your management application by a  
router, ensure that the default gateway IP address within the Switch is  
the same as the IP address of the router.  
I
The Switchs IP address has been entered correctly in your network  
management application (such as 3Com Network Supervisor).  
The following is a brief overview of IP addressing, and how to obtain a  
registered IP address.  
IP Addressing  
To be managed correctly, each device on your network (for example a  
Switch or Hub) must have a unique IP address. IP addresses have the  
format n.n.n.n where n is a decimal number between 0 and 255. An  
example IP address is 192.168.100.8.  
The IP address is split into two parts:  
I
I
The first part (192.168.100in the example) identifies the network on  
which the device resides  
The second part (.8in the example) identifies the device within the  
network  
The natural subnet mask for this example is 255.255.255.0.  
If your network has a connection to the external IP network, that is, you  
access the Internet, you must apply for a registered IP address.  
 
   
Solving Communication Problems  
49  
How do you obtain a registered IP Address?  
The IP registration system ensures that every IP address used is unique; if  
you do not have a registered IP address, you may be using an identical  
address to someone else and your network will not operate correctly.  
InterNIC Registration Services is the organization responsible for  
supplying registered IP addresses. The following contact information is  
correct at time of publication:  
World Wide Web site: http://www.internic.net  
If your IP network is internal to your organization only, that is, you do not  
access the Internet, you may use any arbitrary IP address as long as it is  
not being used by another device on your network. 3Com suggests you  
use addresses in the series 192.160.100.X (where X is a number between  
1 and 254) with a subnet mask of 255.255.255.0. These suggested IP  
addresses are part of a group of IP addresses that have been set aside  
specially for use in houseonly.  
These suggested IP addresses are part of a group of IP addresses that  
have been set aside specially for use in houseonly.  
 
 
50  
CHAPTER 4: PROBLEM SOLVING  
 
SAFETY INFORMATION  
A
You must read the following safety information before carrying out any  
installation or removal of components, or any maintenance procedures  
on the Switch 4400.  
WARNING: Warnings contain directions that you must follow for your  
personal safety. Follow all directions carefully.  
You must read the following safety information carefully before you  
install or remove the unit.  
AVERTISSEMENT: Les avertissements présentent des consignes que vous  
devez respecter pour garantir votre sécurité personnelle. Vous devez  
respecter attentivement toutes les consignes.  
Nous vous demandons de lire attentivement les consignes suivantes de  
sécurité avant dinstaller ou de retirer lappareil.  
VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer  
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu  
befolgen.  
Sie müssen die folgenden Sicherheitsinformationensorgfältig  
durchlesen, bevor Sie das Gerät installieren oder ausbauen.  
 
   
52  
APPENDIX A: SAFETY INFORMATION  
Important Safety Information  
WARNING: Installation and removal of the unit must be carried out by  
qualified personnel only.  
WARNING: If installing the Switch 4400 in a stack with SuperStack II or  
SuperStack 3 units that are narrower than the 4400, the Switch 4400  
unit must be installed below the narrower units.  
WARNING: The unit must be earthed (grounded).  
WARNING: Connect the unit to an earthed power supply to ensure  
compliance with safety standards.  
WARNING: Power Cord Set:  
This must be approved for the country where it is used:  
U.S.A. and  
Canada  
I
I
The cord set must be UL-approved and CSA certified.  
The minimum specification for the flexible cord is:  
No. 18 AWG  
Type SV or SJ  
3-conductor  
I
I
The cord set must have a rated current capacity of at least  
10A.  
The attachment plug must be an earth-grounding type  
with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A,  
250V) configuration.  
United  
Kingdom only  
I
I
The supply plug must comply with BS1363 (3-pin 13 amp)  
and be fitted with a 5A fuse which complies with BS1362.  
The mains cord must be <HAR> or <BASEC> marked and  
be of type H03VVF3GO.75 (minimum).  
Europe only:  
I
I
The supply plug must comply with CEE 7/7 (SCHUKO).  
The mains cord must be <HAR> or <BASEC> marked and  
be of type H03VVF3GO.75 (minimum).  
Denmark  
I
I
The supply plug must comply with section 107-2-D1,  
standard DK2-1a or DK2-5a.  
Switzerland  
The supply plug must comply with SEV/ASE 1011.  
WARNING: The appliance coupler (the connector to the unit and not the  
wall plug) must have a configuration for mating with an EN60320/IEC320  
appliance inlet.  
 
   
Linformation de Sécurité Importante  
53  
WARNING: The socket outlet must be near to the unit and easily  
accessible. You can only remove power from the unit by disconnecting  
the power cord from the outlet.  
WARNING: This unit operates under SELV (Safety Extra Low Voltage)  
conditions according to IEC 950. The conditions are only maintained if  
the equipment to which it is connected also operates under SELV  
conditions.  
WARNING: France and Peru only:  
This unit cannot be powered from ITsupplies. If your supplies are of IT  
type, this unit must be powered by 230V (2P+T) via an isolation  
transformer ratio 1:1, with the secondary connection point labelled  
Neutral, connected directly to earth (ground).  
Impédance à la terre.  
WARNING: U.K. only:  
If connecting a modem to the console port of the Switch 4400, only use a  
modem which is suitable for connection to the telecommunications  
system.  
WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot  
be used as standard traditional telephone sockets, or to connect the unit to a  
traditional PBX or public telephone network. Only connect RJ-45 data  
connectors, network telephony systems, or network telephones to these  
sockets.  
Either shielded or unshielded data cables with shielded or unshielded  
jacks can be connected to these data sockets.  
WARNING: When an Expansion Module is not installed ensure the  
blanking panel is fitted by tightening all screws with a suitable tool.  
Linformation de Sécurité Importante  
AVERTISSEMENT: L'installation et la dépose de ce groupe doivent être  
confiés à un personnel qualifié.  
AVERTISSEMENT: Si vous entassez l'unité Switch avec les unités  
SuperStack 3 Hub, l'unité Switch 4400 doit être installée en dessous des  
unités Hub plus étroites.  
 
   
54  
APPENDIX A: SAFETY INFORMATION  
AVERTISSEMENT: Vous devez mettre lappareil à la terre (à la masse) ce  
groupe.  
AVERTISSEMENT: Brancher lunité à une source de courant mise à la  
terre pour assurer la conformité aux normes de sécurité.  
AVERTISSEMENT: Cordon électrique:  
Il doit être agréé ans le pays d'utilisation:  
Etats-Unis et  
Canada  
I
Le cordon doit avoir reçu l'homologation des UL et un  
certificat de la CSA  
I
Le cordon souple doit respecter, à titre minimum, les  
spécifications suivantes :  
I
I
I
I
calibre 18 AWG  
type SV ou SJ  
à 3 conducteurs  
Le cordon doit être en mesure d'acheminer un courant  
nominal d'au moins 10 A  
I
La prise femelle de branchement doit être du type à mise à la  
terre (mise à la masse) et respecter la configuration NEMA  
5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V)  
Danemark  
Europe  
I
I
I
I
La prise mâle d'alimentation doit respecter la section 107-2  
D1 de la norme DK2 1a ou DK2 5a  
La prise secteur doit être conforme aux normes CEE 7/7  
(SCHKO)  
LE cordon secteur doit porter la mention <HAR> ou  
<BASEC> et doit être de type HO3VVF3GO.75 (minimum).  
Suisse  
La prise mâle d'alimentation doit respecter la norme SEV/ASE  
1011  
AVERTISSEMENT: Le coupleur d'appareil (le connecteur du groupe et  
non pas la prise murale) doit respecter une configuration qui permet un  
branchement sur une entrée d'appareil EN60320/CEI 320.  
AVERTISSEMENT: La prise secteur doit se trouver à proximité de  
lappareil et son accès doit être facile. Vous ne pouvez mettre lappareil  
hors circuit qu'en débranchant son cordon électrique au niveau de cette  
prise.  
AVERTISSEMENT: Lappareil fonctionne à une tension extrêmement  
basse de sécurité qui est conforme à la norme CEI 950. Ces conditions ne  
sont maintenues que si l'équipement auquel il est raccordé fonctionne  
dans les mêmes conditions.  
 
Wichtige Sicherheitsinformationen  
55  
AVERTISSEMENT: France et Pérou uniquement:  
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la  
terre. Si vos alimentations sont du type impédance à la terre, ce groupe  
doit être alimenté par une tension de 230 V (2 P+T) par le biais d'un  
transformateur d'isolement à rapport 1:1, avec un point secondaire de  
connexion portant l'appellation Neutre et avec raccordement direct à la  
terre (masse).  
AVERTISSEMENT: Points daccès RJ-45. Ceux-ci sont protégés par des  
prises de données. Ils ne peuvent pas être utilisés comme prises de  
téléphone conventionnelles standard, ni pour la connection de lunité à  
un réseau téléphonique central privé ou public. Raccorder seulement  
connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou  
téléphones de réseaux à ces prises.  
Il est possible de raccorder des câbles protégés ou non protégés avec des  
jacks protégés ou non protégés à ces prises de données.  
AVERTISSEMENT: Si le module dexpansion nest pas installé, veillez à  
bien installer la plaque dobturation et serrez toutes les vis à laide dun  
outil approprié.  
Wichtige Sicherheitsinformationen  
VORSICHT: Die Installation und der Ausbau des Geräts darf nur durch  
Fachpersonal erfolgen.  
VORSICHT: Wenn die Switch 4400 Einheit in einer Stapel mit anderen  
SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch 4400  
Einheit unter die schmaleren Hub Einheiten eingebaut werden.  
VORSICHT: Das Gerät muß geerdet sein.  
VORSICHT: Das Gerät muß an eine geerdete Steckdose angeschlossen  
werden, die europäischen Sicherheitsnormen erfüllt.  
VORSICHT: Der Anschlußkabelsatz muß mit den Bestimmungen des  
Landes übereinstimmen, in dem er verwendet werden soll.  
VORSICHT: Der Gerätestecker (der Anschluß an das Gerät, nicht der  
Wandsteckdosenstecker) muß eine passende Konfiguration für einen  
Geräteeingang gemäß EN60320/IEC320 haben.  
 
   
56  
APPENDIX A: SAFETY INFORMATION  
VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht  
zugänglich sein. Die Stromversorgung des Geräts kann nur durch  
Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen  
werden.  
VORSICHT: Europe  
I
Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)  
sein und die Aufschrift <HAR> oder <BASEC> tragen.  
I
Der Netzstecker muß die Norm CEE 7/7 erfüllen (SCHUKO).  
VORSICHT: Der Betrieb dieses Geräts erfolgt unter den  
SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 950. Diese  
Bedingungen sind nur gegeben, wenn auch die an das Gerät  
angeschlossenen Geräte unter SELV-Bedingungen betrieben werden.  
VORSICHT: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen.  
Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für  
die Verbindung der Einheit mit einem traditionellem privatem oder  
öffentlichem Telefonnetzwerk gebraucht werden. Nur  
RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese  
Steckdosen anschließen.  
Entweder geschützte oder ungeschützte Buchsen dürfen an diese  
Datensteckdosen angeschlossen werden.  
VORSICHT: Ist kein Erweiterungsmodul installiert, überprüfen Sie bitte  
den Sitz der Stanzplatte, indem Sie alle Schrauben mit einem geeigneten  
Werkzeug anziehen.  
 
PIN-OUTS  
B
Null Modem Cable  
9-pin to RS-232 25-pin  
PC-AT Serial Cable  
9-pin to 9-pin  
 
               
58  
APPENDIX B: PIN-OUTS  
Modem Cable  
9-pin to RS-232 25-pin  
RJ-45 Pin  
Assignments  
Pin assignments are identical for 10BASE-TX and 100BASE-T RJ-45  
connectors.  
Table 11 Pin assignments  
Pin Number  
Signal  
Function  
Ports configured as MDI  
1
2
3
4
5
6
7
8
Transmit Data +  
Transmit Data +  
Receive Data +  
Not assigned  
Not assigned  
Receive Data –  
Not assigned  
Not assigned  
Bidirectional Data A+  
Bidirectional Data A-  
Bidirectional Data B+  
Bidirectional Data C+  
Bidirectional Data C-  
Bidirectional Data B-  
Bidirectional Data D+  
Bidirectional Data D-  
 
       
RJ-45 Pin Assignments  
59  
Table 12 Pin assignments  
Pin Number  
Signal  
Function  
Ports configured as MDIX  
1
2
3
4
5
6
7
8
Receive Data +  
Receive Data -  
Transmit Data +  
Not assigned  
Not assigned  
Transmit Data  
Not assigned  
Not assigned  
Bidirectional Data B+  
Bidirectional Data B-  
Bidirectional Data A+  
Bidirectional Data A-  
Bidirectional Data D+  
Bidirectional Data D-  
Bidirectional Data C+  
Bidirectional Data C-  
 
60  
APPENDIX B: PIN-OUTS  
 
TECHNICAL SPECIFICATIONS  
C
Switch 4400  
(24-port)  
Table 13 Switch 4400 (24-port) Technical Specifications  
Physical Dimensions  
Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)  
Weight: 2.8 kg (6.2 lbs)  
Environmental Requirements  
Operating Temperature  
Storage Temperature  
Operating Humidity  
Standards  
0 ° to 40 °C (32 ° to 104 °F)  
40 ° to +70 °C (-40 ° to 158 °F)  
1095% relative humidity, non-condensing  
EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.  
Operational testing: paras 2.1, 2.2, 2.30 and 2.13).  
Safety  
Agency Certifications  
EMC  
UL 1950, EN60950, CSA 22.2 No. 950, IEC 60950  
Emissions  
CISPRR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A,  
ICES-003 Class A, AS/NZS 3548 Class A, CNS 13438 Class A, EN61000-3-2,  
EN61000-3-3  
Immunity  
EN 55024  
Heat Dissipation  
Power Supply  
AC Line Frequency  
Input Voltage Options  
Current Rating  
(continued)  
75 watts maximum (1300 BTU/hour maximum)  
50/60 Hz  
90240 VAC  
2.3 A (amps)(maximum)  
 
         
62  
APPENDIX C: TECHNICAL SPECIFICATIONS  
Standards Supported  
SNMP  
SNMP protocol (RFC 1157)  
Terminal Emulation  
Telnet (RFC 854)  
MIB-II (RFC 1213)  
Protocols Used for Administration  
UDP (RFC 768)  
Bridge MIB (RFC 1493)  
RMON MIB II (RFC 2021)  
IP (RFC 791)  
Remote Monitoring MIB (RFC  
1757)  
ICMP (RFC 792)  
TCP (RFC 793)  
MAU MIB (RFC 2239)  
ARP (RFC 826)  
TFTP (RFC 783)  
DHCP (RFC 2131, RFC 2132, RFC 1534)  
BOOTP (RFC 951, RFC 1497)  
 
Switch 4400 (48-port)  
63  
Switch 4400  
(48-port)  
Table 14 Switch 4400 (48-port) Technical Specifications  
Physical Dimensions  
Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)  
Weight: 3.2 kg (7.1 lbs)  
Environmental Requirements  
Operating Temperature  
Storage Temperature  
Operating Humidity  
Standards  
0 ° to 40 °C (32 ° to 104 °F)  
40 ° to +70 °C (-40 ° to 158 °F)  
1095% relative humidity, non-condensing  
EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.  
Operational testing: paras 2.1, 2.2, 2.30 and 2.13).  
Safety  
Agency Certifications  
EMC  
UL60950, EN60950, CSA 22.2 No. 60950, IEC 60950  
Emissions  
CISPR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A,  
ICES-003 Class A, AS/NZS 3548 Class A, VCCI Class A, CNS 13438 Class A,  
EN61000-3-2, EN61000-3-3  
Immunity  
EN 55024  
Heat Dissipation  
Power Supply  
120 watts maximum (410 BTU/hour maximum)  
AC Line Frequency  
Input Voltage Options  
Current Rating  
50/60 Hz  
90240 VAC  
2.8 A (amps)(maximum)  
Standards Supported  
SNMP  
SNMP protocol (RFC 1157)  
Terminal Emulation  
Telnet (RFC 854)  
MIB-II (RFC 1213)  
Protocols Used for Administration  
UDP (RFC 768)  
Bridge MIB (RFC 1493)  
RMON MIB II (RFC 2021)  
IP (RFC 791)  
Remote Monitoring MIB (RFC  
1757)  
ICMP (RFC 792)  
TCP (RFC 793)  
MAU MIB (RFC 2239)  
ARP (RFC 826)  
TFTP (RFC 783)  
DHCP (RFC 2131, RFC 2132, RFC 1534)  
BOOTP (RFC 951, RFC 1497)  
 
 
64  
APPENDIX C: TECHNICAL SPECIFICATIONS  
 
TECHNICAL SUPPORT  
D
3Com provides easy access to technical support information through a  
variety of services. This appendix describes these services.  
Information contained in this appendix is correct at time of publication. For  
the most recent information, 3Com recommends that you access the  
3Com Corporation World Wide Web site.  
Online Technical  
Services  
3Com offers worldwide product support 24 hours a day, 7 days a week,  
through the following online systems:  
I
I
I
World Wide Web site  
3Com Knowledgebase Web Services  
3Com FTP site  
World Wide Web Site To access the latest networking information on the 3Com Corporation  
World Wide Web site, enter this URL into your Internet browser:  
This service provides access to online support information such as technical  
documentation and software, as well as support options that range from  
technical education to maintenance and professional services.  
3Com The 3Com Knowledgebase is a database of technical information to help  
Knowledgebase Web you install, upgrade, configure, or support 3Com products. The  
Services Knowledgebase is updated daily with technical information discovered by  
3Com technical support engineers. This complimentary service, which is  
available 24 hours a day, 7 days a week to 3Com customers and partners,  
is located on the 3Com Corporation World Wide Web site at:  
 
                 
66  
APPENDIX D: TECHNICAL SUPPORT  
3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the  
3Com public FTP site. This service is available 24 hours a day, 7 days a week.  
To connect to the 3Com FTP site, enter the following information into  
your FTP client:  
I
I
I
Hostname: ftp.3com.com  
Username: anonymous  
Password: <your Internet e-mail address>  
You do not need a user name and password with Web browser software  
such as Netscape Navigator and Internet Explorer.  
Support from Your  
Network Supplier  
If you require additional assistance, contact your network supplier. Many  
suppliers are authorized 3Com service partners who are qualified to  
provide a variety of services, including network planning, installation,  
hardware maintenance, application training, and support services.  
When you contact your network supplier for assistance, have the  
following information ready:  
I
I
I
I
Product model name, part number, and serial number  
A list of system hardware and software, including revision levels  
Diagnostic error messages  
Details about recent configuration changes, if applicable  
If you are unable to contact your network supplier, see the following  
section on how to contact 3Com.  
Support from 3Com If you are unable to obtain assistance from the 3Com online technical  
resources or from your network supplier, 3Com offers technical telephone  
support services. To find out more about your support options, call the  
3Com technical telephone support phone number at the location nearest  
you.  
When you contact 3Com for assistance, have the following information  
ready:  
I
Product model name, part number, and serial number  
 
         
Support from 3Com  
67  
I
I
I
A list of system hardware and software, including revision levels  
Diagnostic error messages  
Details about recent configuration changes, if applicable  
Here is a list of worldwide technical telephone support numbers. These  
numbers are correct at the time of publication. Refer to the 3Com Web  
site for updated information.  
Country  
Telephone Number  
Country  
Telephone Number  
Asia, Pacific Rim  
Australia  
Hong Kong  
India  
1 800 678 515  
800 933 486  
+61 2 9937 5085 or  
000800 6501111  
001 800 61 009  
03 5783 1270  
P.R. of China  
10800 61 00137 or  
021 6350 1590 or  
00800 0638 3266  
800 6161 463  
00798 611 2230 or  
02 3455 6455  
Singapore  
S. Korea  
Indonesia  
Japan  
Malaysia  
New Zealand  
Pakistan  
1800 801 777  
0800 446 398  
+61 2 9937 5083  
1235 61 266 2602  
Taiwan, R.O.C.  
Thailand  
00798 611 2230  
0080 611 261  
001 800 611 2000  
Philippines  
Europe, Middle East and  
Africa  
From anywhere in these  
regions, call:  
+44 (0)1442 435529 phone  
+44 (0)1442 432524 fax  
Europe and South Africa  
From the following countries, you may use the toll-free numbers:  
Austria  
Belgium  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
Israel  
0800 297468  
0800 71429  
800 17309  
0800 113153  
0800 917959  
0800 1821502  
06800 12813  
1800 553117  
1800 9453794  
800 8 79489  
Luxembourg  
Netherlands  
Norway  
0800 3625  
0800 0227788  
800 11376  
Poland  
00800 3111206  
0800 831416  
0800 995014  
900 983125  
020 795482  
0800 55 3072  
0800 966197  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
Italy  
Latin America  
Brazil  
Mexico  
0800 13 3266  
01 800 849CARE  
Puerto Rico  
Central and South America  
800 666 5065  
AT&T +800 998 2112  
North America  
1 800 NET 3Com  
(1 800 638 3266)  
Enterprise Customers:  
1 800 876-3266  
 
68  
APPENDIX D: TECHNICAL SUPPORT  
Returning Products  
for Repair  
Before you send a product directly to 3Com for repair, you must first  
obtain an authorization number. Products sent to 3Com without  
authorization numbers will be returned to the sender unopened, at the  
senders expense.  
To obtain an authorization number, call or fax:  
Country  
Telephone Number  
Fax Number  
Asia, Pacific Rim  
+ 65 543 6500  
+ 65 543 6348  
Europe, South Africa, and Middle East +44 (0)1442 435529  
+ 44 (0)1442 432524  
Central and South America  
525 201 0075  
Argentina  
Bolivia  
Brazil  
0810 222 3266  
511 241 1691  
0800 133266 or  
55 11 5643 2700  
525 201 0004  
562 240 6200  
525 201 0004  
525 201 0004  
525 201 0004  
525 201 0004  
511 241 1691  
525 201 0004  
525 201 0004  
Caribbean  
Chile  
Colombia  
Ecuador  
Mexico  
Paraguay  
Peru  
Uruguay  
Venezuela  
From the following countries, you may call the toll-free numbers; select option 2 and then option 2:  
Austria  
0800 297468  
0800 71429  
800 17309  
Belgium  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
0800 113153  
0800 917959  
0800 1821502  
00800 12813  
1800553117  
1800 9453794  
1678 79489  
0800 0227788  
800 11376  
00800 3111206  
0800 831416  
0800 995014  
900 983125  
020 795482  
0800 55 3072  
0800 966197  
Israel  
Italy  
Netherlands  
Norway  
Poland  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
 
   
Returning Products for Repair  
69  
Country  
Telephone Number  
Fax Number  
U.S.A. and Canada  
1 800 NET 3Com  
(1 800 638 3266)  
1 408 326 7120  
(not toll-free)  
Enterprise Customers:  
1 800 876 3266  
 
70  
APPENDIX D: TECHNICAL SUPPORT  
 
INDEX  
71  
F
H
hardware features 12  
I
installing the Switch 19  
prerequisites 20  
IP addressing  
3C number 22  
3Com Knowledgebase Web Services 65  
3Com URL 65  
IP configuration 28  
A
access levels of default users 44  
automatic setup 36  
3Com Network Supervisor 36  
L
LEDs 15  
B
M
management  
methods 39  
preparing for 30  
manual setup 31  
console port 33  
front panel port 31  
MDIX configuration 24  
MIBs 66  
C
cable  
Cascade Extender Kit 23  
Cascade Stacking Kit 23  
CD-ROM  
9
command line interface  
N
network supplier support 66  
conventions  
notice icons, About This Guide  
8
text, About This Guide  
8
O
online technical services 65  
D
P
default  
passwords  
settings 18  
users 44  
of default users 44  
pin assignments  
modem cable 58  
null modem cable 57  
RJ45 58  
E
Ethernet address of the Switch 22  
serial cable 57  
 
 
72  
pin-outs 57  
ports  
console 17  
power socket 17  
product name 22  
rack mounting 21  
RPS socket 17  
system specifications 61  
product name 22  
T
R
3Com Knowledgebase Web Services 65  
3Com URL 65  
network suppliers 66  
product repair 68  
RPS 17  
U
URL 65  
S
safety information  
W
Web browsers  
choosing 42  
web interface  
choosing a browser 42  
web interface management 40  
setting up 42  
SNMP 43  
World Wide Web (WWW) 65  
socket  
software features 13  
Switch 4400  
console port 17  
dimensions 61  
Ethernet address 22  
features 12, 13  
initial setup 30  
installation 19, 20  
MAC address 22  
manual setup 31  
power socket 17  
powering-up 23  
 
REGULATORY NOTICES  
FCC STATEMENT  
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 instructions,  
may cause harmful interference to radio communications. Operation of this equipment in a residential area is  
likely to cause harmful interference to radio communications, in which case the user will be required to  
correct the interference at their own expense.  
INFORMATION TO THE USER  
If this equipment does cause interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of  
the following measures:  
I
I
I
I
Reorient the receiving antenna.  
Relocate the equipment with respect to the receiver.  
Move the equipment away from the receiver.  
Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits.  
If necessary, the user should consult the dealer or an experienced radio/television technician for additional  
suggestions. The user may find the following booklet prepared by the Federal Communications Commission  
helpful:  
How to Identify and Resolve Radio-TV Interference Problems  
This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No.  
004-000-00345-4.  
In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE  
802.3.  
CSA STATEMENT  
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment  
Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur  
du Canada.  
CE STATEMENT (EUROPE)  
VCCI STATEMENT  
This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as  
amended by European Directive 93/68/EEC.  
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.  
BSMI STATEMENT  
 
 
 

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