3Com Switch 4226T User Manual

®
SuperStack 3  
Switch 4200 Family  
Getting Started Guide  
Switch 4226T (3C17300)  
Switch 4250T (3C17302)  
Switch 4228G (3C17304)  
Part No. DUA1730-0AAA04  
Published July 2005  
 
ABOUT THIS GUIDE  
GBIC Ports 14  
LEDs 15  
Switch 4200 Family — Rear View Detail 17  
Rack-mounting 21  
Placing Units On Top of Each Other 23  
Stacking Units 23  
The Power-up Sequence 24  
Powering-up the Switch 4200 Family 24  
Checking for Correct Operation of LEDs 24  
Connecting a Redundant Power System 25  
 
 
PC-AT Serial Cable 67  
RJ-45 Pin Assignments 68  
C TECHNICAL SPECIFICATIONS  
(3C17302) 73  
Switch 4228G  
D OBTAINING SUPPORT FOR YOUR PRODUCT  
Register Your Product 75  
Purchase Value-Added Services 75  
Troubleshoot Online 76  
Access Software Downloads 76  
Contact Us 77  
INDEX  
REGULATORY NOTICES  
 
 
ABOUT THIS GUIDE  
This guide provides all the information you need to install and use a  
SuperStack® 3 Switch 4200 in its default state.  
This guide is intended for use with the following Switch 4200 Family  
models:  
Switch 4226T (3C17300) — 24 10BASE-T/100BASE-TX ports,  
2 10/100/1000BASE-T ports  
Switch 4250T (3C17302) — 48 10BASE-T/100BASE-TX ports,  
2 10/100/1000BASE-T ports  
Switch 4228G (3C17304) — 24 10BASE-T/100BASE-TX ports,  
2 10/100/1000BASE-T ports and 2 GBIC ports  
All procedures described in this guide apply to all models except where  
stated.  
For details on the Switch 4200 26-Port (3C17300A), Switch 4200 50-Port  
(3C17302A) and Switch 4200 28-Port (3C17304A), refer to the following  
document:  
SuperStack 3 Switch 4200 Family Getting Started Guide (part number  
DUA1730-0AAA03)  
available for download from the 3Com Web site, www.3Com.com.  
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.  
 
 
8
ABOUT THIS GUIDE  
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:  
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 “syntax” means 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 “command” means 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 “enter” in 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  
 
         
Related Documentation  
9
Table 2 Text Conventions (continued)  
Convention  
Description  
Words in italics  
Italics are used to:  
Emphasize a point.  
Denote a new term at the place where it is defined in the  
text.  
Identify menu names, menu commands, and software  
button names. Examples:  
From the Help menu, select Contents.  
Click OK.  
Related  
Documentation  
In addition to this guide, each Switch documentation set includes the  
following:  
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. It is  
supplied in PDF format on the CD-ROM that accompanies the Switch.  
SuperStack 3 Switch Management Quick Reference Guide  
This guide contains:  
a list of the software features supported by the Switch.  
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.  
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:  
Documentation accompanying the Advanced Redundant Power  
system.  
 
 
10  
ABOUT THIS GUIDE  
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:  
SuperStack 3 Switch Management Quick Reference Guide (PDF  
format)  
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.  
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.  
The HTML Reference Guide is stored in the Docs/reference directory  
on the CD-ROM. The documentation is accessed using the  
contents.htm file.  
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.  
 
   
INTRODUCING THE  
SUPERSTACK 3 SWITCH 4200  
1
This chapter contains introductory information about the Switch 4200  
Family and how it can be used in your network. It covers summaries of  
hardware and software features and also the following topics:  
About the Switch 4200 Family  
Switch 4200 Family — Front View Detail  
Switch 4200 Family — Rear View Detail  
Default Settings  
This Getting Started Guide describes the following units in the Switch  
4200 Family:  
Switch 4226T (3C17300)  
Switch 4250T (3C17302)  
Switch 4228G (3C17304)  
For details on the Switch 26-Port (3C17300A), Switch 50-Port  
(3C17302A) and Switch 28-Port (3C17304A), refer to the following  
document:  
SuperStack 3 Switch 4200 Family Getting Started Guide (part number  
DUA1730-0AAA03)  
available for download from the 3Com Web site, www.3Com.com.  
 
   
12  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES  
About the Switch  
4200 Family  
The Switch 4200 Family are stackable 10/100/1000 Mbps devices which  
consists of:  
24 or 48 10BASE-T/100BASE-TX ports  
2 10/100/1000BASE-T ports  
2 GBIC ports (Switch 4228G only)  
The Switch provides high-performance workgroups with a backbone to  
server connection. You can also add the Switch 4200 Family to any  
SuperStack® system as your network grows.  
Summary of Table 3 summarizes the hardware features that are supported by the  
Hardware Features Switch 4200 Family.  
Table 3 Hardware features  
Feature  
Switch 4200 Family  
Addresses  
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 10/100 ports. Full duplex  
on 1000BASE-T ports and full duplex on GBIC ports  
Flow Control  
In full duplex operation all ports are supported  
Smart Auto-sensing  
Supported on all ports except GBIC ports which are  
single speed ports.  
Smart auto-sensing allows auto-negotiating ports to  
monitor and detect a high error rate on a link, or a  
problem in the "physical" interconnection to  
another port and react accordingly.  
Traffic Prioritization  
Supported (IEEE 802.ID): 2 queues per port  
Ethernet and Fast Ethernet Auto-negotiating 10BASE-T/100BASE-TX ports  
Ports  
Gigabit Ethernet  
GBIC  
Auto-negotiating 10/100/1000BASE-T ports  
Auto-negotiating GBIC ports (Switch 4228G only)  
RPS Support  
Connects to SuperStack Advanced Redundant  
Power System (ARPS) (3C16071, 3C16071A or  
3C16071B)  
Mounting  
19-inch rack or stand-alone mounting  
 
       
About the Switch 4200 Series  
13  
Switch 4200 Family  
— Front View  
Detail  
Figure 1 Switch 4226T (3C17300) — front view  
10BASE-T / 100BASE-TX  
RJ-45 Ports  
Power / Self Test LED  
Unit LEDs  
3C17300 Superstack 3 Switch 4226T  
14  
3
15  
4
16  
5
17  
6
18  
7
19  
8
9
21  
10 22  
11 23 12 24  
1
13  
2
20  
Power/  
Self Test  
1
2
3
4
25 / Up 26 / Down  
Alert  
Unit  
Alert LED  
10/100/1000BASE-T  
ports  
Figure 2 Switch 4250T (3C17302) — front view  
10BASE-T / 100BASE-TX  
RJ-45 Ports  
Unit LEDs  
Power / Self Test LED  
3C17302 Superstack 3 Switch 4250T  
1
25  
2
26  
3
27  
4
5
29  
6
30  
7
31  
8
32  
9
33  
10 34  
11  
35  
12 36  
13 37  
14  
38  
15  
39  
16 40  
17 41  
18 42  
19 43  
20  
44  
21  
45  
22 46  
23 47  
24  
48  
28  
Power/  
Self Test  
1
2
3
4
Alert  
Unit  
50  
49  
Alert LED  
10/100/1000BASE-T  
ports  
Figure 3 Switch 4228G (3C17304) — front view  
10BASE-T / 100BASE-TX  
RJ-45 Ports  
Power / Self Test LED  
Unit LEDs  
3C17304 Superstack 3 Switch 4228G  
14  
3
15  
4
16  
5
17  
6
18  
7
19  
8
9
21  
10 22  
11 23 12 24  
1
13  
2
20  
Power/  
Self Test  
27  
28  
28  
1
2
3
4
25 / Up 26 / Down  
27  
Alert  
Unit  
Alert LED  
10/100/1000BASE-T GBIC ports  
ports  
 
 
14  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES  
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.  
10BASE-T/ The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports  
100BASE-TX Ports configured as Auto MDIX (cross-over). While auto-negotiation is enabled,  
these ports can automatically detect whether they need to operate in  
MDI or MDIX mode. Alternatively, you can manually set these 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.  
10/100/1000BASE-T The Switch has two auto-negotiating 10/100/1000BASE-T ports  
Ports configured as Auto MDIX (cross-over). While auto-negotiation is enabled,  
these ports can automatically detect whether they need to operate in  
MDI or MDIX mode. These ports provide 10/100/1000 Mbps full duplex  
connections to other Gigabit Ethernet devices. Full duplex allows packets  
to be transmitted and received simultaneously which, in effect, doubles  
the potential throughput of a link. These ports require either  
straight-through or cross-over Category 5 cables with RJ-45 connectors at  
both ends. The maximum UTP cable length is 100 m (328 ft) over  
Category 5 cable.  
The 10/100/1000BASE-T ports will auto-negotiate to the appropriate  
speed.  
GBIC Ports This section applies to the SuperStack 3 Switch 4228G only.  
The two GBIC ports support Category 5 twisted pair cable and fiber  
Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul (LH70)  
GBIC transceivers in any combination. This offers you the flexibility of  
using GBIC transceivers to provide connectivity between the Switch and  
remote 1000 Mbps workgroups or to create a high capacity aggregated  
link backbone connection.  
 
             
About the Switch 4200 Series  
15  
Fiber GBIC's.  
The default state for these ports is auto-negotiation enabled, where  
speed, duplex and flow control modes are negotiated. Because the speed  
and duplex modes are fixed by the media type, only the flow control is  
negotiated with the link partner. Alternatively, auto-negotiation can be  
disabled and the flow control setting can be manually configured.  
1000BASE-T GBIC's  
it is not possible to disable auto-negotiation it is possible to change the  
advertised capabilities for flow control support, effectively enabling or  
disabling flow control.  
LEDs Table 4 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 LEDs” on page 54.  
It is not possible to determine the duplex mode from the LEDs. For more  
detailed information, refer to the “SuperStack 3 Switch Management  
Interface Reference Guide” on the CD-ROM that is supplied with the  
Switch.  
Table 4 LED behavior  
LED  
Color  
Indicates  
Port Status LEDs 10BASE-T/100BASE-TX ports  
Green  
A 100 Mbps link is present and the port is enabled.  
Green flashing Packets are being transmitted/received on the port.  
Yellow  
A 10 Mbps link is present and the port is enabled.  
Yellow flashing Packets are being transmitted/received on the port.  
Green / Yellow A 10 or 100 Mbps link is present, but the port is disabled.  
alternating  
Off  
No link is present.  
Port Status LEDs GBIC ports  
Green  
A 1000 Mbps link is present and the port is enabled.  
Green flashing Packets are being transmitted/received on the port.  
Port Status LEDs 10/100/1000BASE-T ports  
Green  
(continued)  
A 1000 Mbps link is present and the port is enabled.  
 
     
16  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES  
LED  
Color  
Green flashing Packets are being transmitted/received on the port.  
Yellow A 10 or 100 Mbps link is present and the port is enabled.  
Indicates  
Yellow flashing Packets are being transmitted/received on the port.  
Green / Yellow A 10, 100 or 1000 Mbps link present but disabled.  
alternating  
Off  
Unit LEDs  
1–4 Green  
No link is present.  
When the Switch forms a stack with other Switch 4200  
Family units the LED indicates the position of the unit in the  
stack and that a link is present. Unit LED number 1 can also  
indicate a stand-alone Switch.  
Off  
The Switch initialization process is not complete.  
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  
The Switch has failed its Power On Self Test.  
Refer to Chapter 4 Solving Problems Indicated by LEDs.  
Off  
The Switch is not receiving power or there is a fault with the  
Power Supply Unit.  
Alert LED  
Green flashing The Switch Alert LED has been configured via the CLI or Web  
Interface to flash.  
Off  
The Switch Alert LED has been configured via the CLI or Web  
Interface to be off (Default state).  
 
About the Switch 4200 Series  
17  
Switch 4200 Family  
— Rear View Detail  
Figure 4 Switch 4200 Family — rear view  
Supply Data Warning Label  
Console  
(max) 19200,8,1,N  
Redundant Power System Socket  
Console Port  
Power Socket  
Power Socket The Switch automatically adjusts its power setting to any supply voltage  
in the range 90-240 VAC.  
Redundant Power To protect against internal power supply failure, you can use this socket  
System Socket to connect a Switch 4200 to a SuperStack Advanced Redundant Power  
System (RPS). See “Connecting a Redundant Power System” on page 25.  
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.  
 
                 
18  
CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES  
Default Settings  
Table 5 shows the default settings for the Switch 4200 Family:  
Table 5 Default Settings  
Feature  
Switch 4200 Family  
Enabled  
Automatic IP Configuration  
Port Status  
Enabled  
Port Speed  
All ports are auto-negotiated  
All ports are auto-negotiated  
Duplex Mode  
Flow Control  
Enabled in half duplex  
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:  
Enabled on all ports  
RMON Alarm  
Smart Auto-Sensing  
LACP  
Enabled  
Enabled  
(10/100/1000BASE-T ports and GBIC ports only)  
Enabled  
Quality of Service (QoS)  
All ports prioritize NBX VoIP IP.  
All ports set to “best effort” for 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:  
IP Address  
Subnet Mask  
Default Router  
 
     
INSTALLING THE SWITCH  
2
This chapter contains the information you need to install and set up the  
Switch 4200 Family. It covers the following topics:  
Package Contents  
Choosing a Suitable Site  
Rack-mounting  
Placing Units On Top of Each Other  
The Power-up Sequence  
GBIC Operation  
WARNING: Safety Information. Before installing or removing any  
components from the Switch 4200 Family 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 4200 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 4200 entfernen oder dem Switch 4200 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  
Switch unit  
CD-ROM  
Getting Started Guide (this 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:  
Cabling is located away from:  
sources of electrical noise such as radios, transmitters and  
broadband amplifiers.  
power lines and fluorescent lighting fixtures  
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.  
Air temperature around the Switch does not exceed 40 °C (104 °F).  
If the Switch is installed in a 19-inch rack or closed assembly its local air  
temperature may be greater than room ambient temperature.  
The air is as free from dust as possible.  
 
     
Rack-mounting  
21  
The switch is situated away from sources of conductive (electrical)  
dust, for example, laser printers.  
The unit is installed in a clean, air conditioned environment.  
The AC supply used by the switch is separate to that used by units  
that generate high levels of AC noise, for example, air-conditioning  
units and laser printers.  
No more than eight Switch units are placed on top of one another, if  
the units are free-standing.  
Rack-mounting  
The Switch 4200 Family are 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 5.  
 
   
22  
CHAPTER 2: INSTALLING THE SWITCH  
Figure 5 Fitting a bracket for rack-mounting  
3 Insert the two screws and tighten with a suitable screwdriver.  
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:  
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  
23  
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  
Up to four Switch 4200 Family units can be stacked together and then  
treated as a single manageable unit with one IP address. Any  
combination of Switch 4200 Family units is allowed in a single stack. The  
units are connected together via the 10/100/1000BASE-T ports on the  
front of the unit as shown in Figure 6. Starting from the base of the stack,  
the port marked with ‘up’ is connected to the port marked with ‘down’  
on the unit above. Cable lengths of between 14 cm (5.5 in) and  
100 m (328 ft) can be used for stacking.  
Figure 6 Stacking example  
3C17302A Superstack  
20 44 21 45  
22 46  
3
Switch 4200 50-Port  
23 47  
24 48  
1
25  
13  
13  
13  
2
2
2
2
26  
14  
14  
14  
3
27  
15  
15  
15  
4
28  
16  
16  
16  
5
5
5
5
29  
17  
17  
17  
6
30  
18  
18  
18  
7
31  
19  
19  
19  
8
8
8
8
32  
20  
20  
20  
9
33  
10 34  
11 35  
12 36  
13 37  
14 38  
15 39  
16 40  
17 41  
18 42  
19 43  
Power/  
Self Test  
1
2
3
4
Alert  
Unit  
50  
49  
3C17304A Superstack  
3C17304A Superstack  
3C17300A Superstack  
3
Switch 4200 28-Port  
Switch 4200 28-Port  
Switch 4200 26-Port  
1
3
4
6
7
9
21  
10 22  
11 23 12 24  
11 23 12 24  
11 23 12 24  
Power/  
27  
28  
Self Test  
28  
27  
1
2
3
4
25 / Up 26  
/ Down  
Alert  
Unit  
3
1
3
4
6
7
9
21  
10 22  
Power/  
27  
28  
Self Test  
27  
28  
1
2
3
4
25 / Up 26  
/ Down  
Alert  
Unit  
3
1
3
4
6
7
9
21  
10 22  
Power/  
Self Test  
1
2
3
4
25  
/
Up 26  
/ Down  
Alert  
Unit  
The unit LEDs will display the unit number in the stack, from 1 at the  
bottom to 4 at the top.  
3Com recommends that when you add a new unit to a stack, you should  
first initialize it to factory default settings.  
Any Switch 4200 unit can be added to the stack, including the Switch  
26-Port (3C17300A), the Switch 50-Port (3C17302A) and the Switch  
28-Port (3C17304A). You must install the latest software version on all  
units in the stack.  
 
       
24  
CHAPTER 2: INSTALLING THE SWITCH  
Stack renumbering occurs when another Switch 4200 Family unit is  
added to the bottom of an established stack except when the stack is  
already 4 units high. In this instance the ‘down’ port on the bottom unit  
of the existing stack will be disabled and its LED will flash green. You will  
then not be able to use that port again until the link is lost on that port.  
When another Switch 4200 Family unit is added to the top of an  
established stack, no stack renumbering occurs. If however the unit being  
added takes the stack height above 4 then the ‘up’ port on the top unit  
of the existing stack will be disabled and its LED will flash green. You will  
then not be able to use that port again until the link is lost on that port.  
When removing a Switch from a stack, note the following:  
Removing a Switch 4200 Family unit from the bottom of an existing  
stack will cause the remaining stack to renumber.  
Removing a Switch 4200 Family unit from the middle of an existing  
stack will cause the other Switches in the stack to divide into two  
stacks. Units below the unit removed will not renumber, units above  
will renumber.  
Removing a Switch 4200 Family unit from the top of an existing stack  
will have no effect on the remaining stack.  
If you are having problems, refer to “Solving Stack Formation Problems”  
on page 56.  
The Power-up  
Sequence  
The following sections describe how to get your Switch 4200 Family  
powered-up and ready for operation.  
Powering-up the Use the following sequence of steps to power-up the Switch.  
Switch 4200 Family  
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.  
 
       
The Power-up Sequence  
25  
When the POST has completed, check the Power On Self Test LED to  
make sure that your Switch is operating correctly. Table 6 shows possible  
colors for the LED.  
Table 6 Power/Self Test LED colors  
Color  
Green  
Yellow  
Off  
State  
The Switch is powered-up and operating normally.  
The Switch has failed its Power On Self Test.  
The Switch is not receiving power.  
In addition, check the Unit LEDs on all Switches in the stack. If a Unit LED  
is off, initialization is not complete. 3Com recommends that you do not  
use the Switch's management interface until the Unit LED is green.  
If there is evidence of a problem, see “Solving Problems Indicated by  
LEDs” on page 54.  
Connecting a You can connect a SuperStack Advanced Redundant Power System  
Redundant Power (3C16071, 3C16071A or 3C16071B) to the Switch. This unit, which is  
System also known as an RPS, is 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 (part number  
3C16078).  
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 4200 Family are Auto-MDIX,  
Cables that is 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.  
 
             
26  
CHAPTER 2: INSTALLING THE SWITCH  
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 a cross-over cable. Many ports on workstations and  
servers are configured as MDI (straight-through). If you want to make a  
connection to an MDI port, you need to use a standard straight-through  
cable. See Table 7.  
3Com recommends that you use Category 5 twisted pair cable — the  
maximum segment length for this type of cable is 100 m (328 ft).  
CAUTION: If you want to install the Switch using a Category 5E or  
Category 6 cable, 3Com recommends that you briefly connect the cable  
to a grounded port before connecting network equipment. If you do not,  
the cables Electrostatic Discharge (ESD) may damage the Switch's port.  
You can create a grounded port by connecting all wires at one end of a  
UTP cable to an earth ground point, and the other end to a female RJ-45  
connector located, for example, on a Switch rack or patch panel. The  
RJ-45 connector is now a grounded port.  
Table 7 Cables required to connect the Switch 4200 Family 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)  
Choosing the correct Choose from the following cable options:  
Fiber cables  
The 1000BASE-SX ports can be connected to multimode fiber cables  
only.  
The 1000BASE-LX and LH70 GBIC ports use multimode or  
single-mode fiber optic cables.  
For detailed information on fiber cable specifications, refer to the  
SuperStack 3 Implementation Guide that accompanies your Switch.  
 
     
GBIC Operation  
27  
If you wish to connect a 1000BASE-SX MT-RJ port to a fiber port with a  
different type of connector, for example, SC or ST please contact your  
network supplier for a suitable patch cable.  
GBIC Operation  
The following section describes how to insert a GBIC transceiver into a  
GBIC port. This section applies to the SuperStack 3 Switch 4228G only.  
GBIC transceivers are hot-insertable and hot-swappable. You can remove  
them from and insert them into any GBIC port without having to power  
down the Switch.  
Approved GBIC The 3Com approved GBIC transceivers are:  
Transceivers  
1000BASE-SX GBIC (3CGBIC91)  
1000BASE-LX GBIC (3CGBIC92)  
1000BASE-T GBIC (3CGBIC93)  
1000BASE-LH70 GBIC (3CGBIC97)  
These are correct at the time of publication.  
To access the latest list of approved GBIC transceivers for the Switch on  
the 3Com Corporation World Wide Web site, enter this URL into your  
internet browser:  
The URL is case sensitive.  
Inserting a GBIC To be recognised as valid, the GBIC transceiver must have the following  
Transceiver characteristics:  
1000BASE-SX, 1000BASE-LX, 1000BASE-T or 1000BASE-LH70 media  
type:  
1000BASE-SX GBIC transceiver  
Use this transceiver to connect the Switch directly to a multimode  
fiber-optic cable.  
1000BASE-T GBIC transceiver  
Use this transceiver to connect the Switch directly to Category 5  
twisted-pair cable.  
 
       
28  
CHAPTER 2: INSTALLING THE SWITCH  
1000BASE-LX GBIC transceiver  
Use this transceiver to connect the Switch directly to a single-mode  
fiber-optic cable or to multimode fiber using a conditioned launch  
cable.  
1000BASE-LH70 GBIC transceiver  
fiber-optic cable or to multimode fiber using a conditioned launch  
cable.  
Fiber SC connector  
Type 4 GBIC with internal EEPROM fitted.  
If the GBIC transceiver is faulty, it will not operate within the Switch. See  
“Solving Hardware Problems” on page 55.  
Do not use non-3Com GBICs. If the GBIC transceiver is invalid it will not  
be recognised by the Switch.  
Use the following sequence of steps to activate the GBIC ports.  
1 To insert one of the transceivers into a GBIC expansion port on the  
Switch:  
a Orient the transceiver so that the fiber-optic duplex subscriber  
connector (SC) is toward you, as shown in Figure 7.  
b Gently slide the transceiver into the GBIC port until it clicks into place.  
2 If you wish to remove the transceiver, compress the side tabs and gently  
pull the transceiver out of the port.  
CAUTION: GBIC transceivers are keyed and can be properly inserted only  
one way. If the transceiver does not click when you insert it, remove it,  
turn it over, and reinsert it.  
 
GBIC Operation  
29  
Figure 7 Inserting a GBIC Transceiver  
erstack 3 Switch 4228G  
GBIC Ports  
GBIC  
Transceiver  
3 The transceiver connects to the network using a duplex SC connector.  
Attach a male duplex SC connector on the network cable into the duplex  
SC connector on the transceiver.  
4 Connect the other end of the cable to a device fitted with an appropriate  
Gigabit Ethernet connection.  
5 Check the LEDs on the front of the Switch to ensure that it is operating  
correctly. Refer to “LEDs” on page 15 for more information.  
 
 
30  
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.  
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  
Setting Up Overview  
Manually Configuring IP Information  
Viewing Automatically Configured IP Information  
Methods of Managing a Switch  
Setting Up Command Line Interface Management  
Setting Up Web Interface Management  
Setting Up SNMP Management  
Default Users and Passwords  
 
       
32  
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. The  
whole setup process is summarised in Figure 8. Detailed procedural steps  
are contained in the sections that follow. In brief, you need to:  
Configure IP information manually for your Switch or view the  
automatically configured IP information  
Prepare for your chosen method of management  
Figure 8 Initial Switch Setup and Management Flow diagram  
Power up the Switch.  
IP information is automatically configured.  
Page 31.  
Do you want to manually  
configure the IP information?  
Yes  
No  
How do you want to view the automatically  
configured IP information?  
How do you want to connect to the Switch?  
Connect to a front panel  
Connect to the console  
port and use the  
Command Line Interface.  
Page 36.  
Connect to a console  
Use 3Com Network  
Supervisor (3NS).  
Page 40.  
port and use the Web  
Interface or Command  
Line Interface.  
port and use the  
Command Line Interface.  
Page 40.  
Page 33.  
How do you want to Manage your Switch? Page 45.  
SNMP  
Page 47.  
Command Line Interface  
Web Interface  
Connect via the  
Page 45.  
Connect over the  
network via Telnet.  
Page 45.  
Connect over the  
network.  
Page 47.  
CAUTION: To protect your Switch from unauthorized access, you must  
change all three 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  
Passwords” on page 50.  
 
     
Setting Up Overview  
33  
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:  
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  
your DHCP or BootP server does not allow you to allocate static IP  
addresses. (Static IP addresses are necessary to ensure that the Switch  
For most installations, 3Com recommends that you configure the Switch  
IP information 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 “Manually Configuring IP Information” section on page 35.  
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 its default IP  
address 169.254.100.100 if it is operating in a standalone mode, and/or  
no other Switches on the network have this IP address. If this default IP  
address is already in use on the network then the Switch detects this and  
configures itself with an IP address in the range 169.254.1.0 to  
169.254.254.255.  
This process 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.  
 
   
34  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
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 on the CD-ROM that  
accompanies your Switch or on the 3Com Web site.  
You should use the automatic IP configuration method if:  
your network uses DHCP or BootP to allocate IP information, or  
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 discover  
the automatically allocated IP information before you can begin  
management. Work through the “Viewing Automatically Configured IP  
Information” section on page 42.  
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 45.  
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 Guide” on the  
CD-ROM that is supplied with the Switch or on the 3Com Web site.  
 
   
Manually Configuring IP Information  
35  
Manually  
Configuring IP  
Information  
You can manually configure the Switch IP information in the following  
ways:  
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 or the  
command line interface (CLI).  
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.  
The procedure described in this section assumes the unit has been  
powered up in standalone mode and has the default IP address of  
169.254.100.100.  
Pre-requisites  
A workstation running Windows 2000, Windows XP or Windows  
Server 2003, Red Hat Linux 9, Solaris 7 or Solaris 9.  
A Network Interface Card (NIC).  
A Category 5 twisted pair Ethernet cable with RJ-45 connectors.  
A suitable Web browser — refer to “Choosing a Browser”on page 48.  
You need to have the following so that you can manually set up the  
Switch with IP information:  
IP address  
subnet mask  
default gateway  
 
     
36  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Connecting the Workstation to the Switch  
1 Connect the workstation to a front panel port using an Ethernet cable as  
shown in Figure 9.  
Figure 9 Connecting a workstation to the Switch via a front panel port  
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.  
Do not interconnect the Switch to any other unconfigured 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:  
IP address — 169.254.100.99  
Subnet mask — 255.255.0.0  
Setting Up the Switch with IP Information  
You are now ready to manually set up the Switch with IP information. You  
can do this using the Web interface or the command line interface (CLI)  
via telnet.  
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.  
 
 
Manually Configuring IP Information  
37  
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 (default user name and password).  
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 Switch” on page 45.  
Using Command Line Interface via Telnet  
Accessing the Command Line Interface via Telnet or Windows  
HyperTerminal using TCP/IP may not work correctly on some platforms  
unless it has been configured to send line feeds with carriage returns.  
To set this for telnet enter set crlfwhen in command mode. To set  
this for HyperTerminal click on the Settings tab in the Properties screen,  
click on ASCII Setup.. and ensure that Send line ends with line feeds is  
checked within the ASCII Sending section. You should not configure  
HyperTerminal in this way if you are using a console cable to make a  
direct connection to the Switch.  
1 To start a Telnet session to the unit, click Start in Microsoft Windows  
2000/XP.  
a Click Run.  
b In the dialogue box that appears type the default IP address of the  
unit, that is: Telnet 169.254.100.100  
c Click OK.  
2 Press Enter to open a login prompt.  
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  
 
38  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
top-level menu of the command line interface is displayed as shown in  
the example in Figure 10.  
Figure 10 Example top-level command line interface menu  
Menu options: --------------3Com Superstack 3 Switch 4200---------------  
bridge  
- Administer bridge-wide parameters  
- Basic device configuration  
- Logout of the Command Line Interface  
- Administer physical interfaces  
- Administer protocols  
gettingStarted  
logout  
physicalInterface  
protocol  
security  
- Administer security  
system  
- Administer sytem-level functions  
- Administer traffic management  
trafficManagement  
Type ? For help  
-------------------------------(1)-----------------------------------  
Select menu option:  
4 At the Select menu option prompt you can either:  
enter the protocol ip basicConfigcommand. At the Enter  
configuration methodprompt enter manual. The screen  
prompts you to enter IP information.  
or  
enter the gettingStarted command. At the Enter  
configuration methodprompt enter manual. The screen  
prompts you to enter IP information.  
5 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 Switch” on page 45.  
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.  
 
     
Manually Configuring IP Information  
39  
Pre-requisites  
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.  
Documentation supplied with the terminal emulation software.  
A suitable cable:  
A standard null modem cable — if you are connecting directly to  
the console port, or  
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 67.  
You need to have the following so that you can manually set up the  
Switch with IP information:  
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 11.  
Figure 11 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.  
 
 
40  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
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:  
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 12.  
 
Manually Configuring IP Information  
41  
Figure 12 Example top-level command line interface menu  
Menu options: --------------3Com Superstack 3 Switch 4200---------------  
bridge  
- Administer bridge-wide parameters  
- Basic device configuration  
- Logout of the Command Line Interface  
- Administer physical interfaces  
- Administer protocols  
gettingStarted  
logout  
physicalInterface  
protocol  
security  
- Administer security  
system  
- Administer sytem-level functions  
- Administer traffic management  
trafficManagement  
Type ? For help  
-------------------------------(1)-----------------------------------  
Select menu option:  
3 At the Select menu option prompt you can either:  
enter the protocol ip basicConfigcommand. At the Enter  
configuration methodprompt enter manual. The screen  
prompts you to enter IP information.  
or  
enter the gettingStarted command. At the Enter  
configuration methodprompt 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 Switch” on page 45.  
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.  
 
 
42  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Viewing  
If you allow the Switch to automatically configure its own IP information  
you need to discover and view the IP information before you can begin to  
manage the Switch. You can discover the IP information in two ways:  
Automatically  
Configured IP  
Information  
Using 3Com Network Supervisor — This application will auto-discover  
the Switch and display the automatically allocated IP information  
assigned to the Switch.  
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, the workstation  
running 3Com Network Supervisor must be on the same subnet as the  
Switch, because Auto-IP addresses are non-routable.  
Connecting to the Alternatively, you can view the automatically configured IP information  
Console Port via the command line interface (CLI) through a 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  
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.  
Documentation supplied with the terminal emulation software.  
 
           
Viewing Automatically Configured IP Information  
43  
A suitable cable:  
A standard null modem cable — if you are connecting directly to  
the console port, or  
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 67.  
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 13.  
Figure 13 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:  
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.  
 
 
44  
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 14.  
Figure 14 Example top-level command line interface menu  
Menu options: --------------3Com Superstack 3 Switch 4200---------------  
bridge  
- Administer bridge-wide parameters  
- Basic device configuration  
- Logout of the Command Line Interface  
- Administer physical interfaces  
- Administer protocols  
gettingStarted  
logout  
physicalInterface  
protocol  
security  
- Administer security  
system  
- Administer sytem-level functions  
- Administer traffic management  
trafficManagement  
Type ? For help  
-------------------------------(1)-----------------------------------  
Select menu option:  
4 At the Select menu option prompt enter the protocol ip  
interface summarycommand. At the Select IP interfaces  
 
 
Methods of Managing a Switch  
prompt enter all. A summary of the automatically allocated IP  
information is displayed. Make a note of the Network IP Address.  
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 Switch” on page 45.  
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:  
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 15), or remotely over the network (see Figure 16).  
 
       
46  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Figure 15 CLI management via the console port  
Figure 16 CLI management over the network  
Refer to “Setting Up Command Line Interface Management” on  
page 47.  
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 17).  
Figure 17 Web interface management over the network  
Connect over Network  
via web browser  
Switch  
Workstation  
Refer to “Setting Up Web Interface Management” on page 48.  
SNMP Management You can manage a Switch using any network management workstation  
running the Simple Network Management Protocol (SNMP) as shown in  
Figure 18. For example, you can use the 3Com Network Supervisor  
software that is provided on the CD-ROM that accompanies your Switch.  
 
             
Setting Up Command Line Interface Management  
47  
Connect over Network  
using SNMP  
Switch  
SNMP Network Management  
Workstation  
Refer to “Setting Up SNMP Management” on page 49.  
Setting Up  
This section describes how you can set up command line interface  
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  
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 “Setting Up Overview” on page 32.  
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.  
 
       
48  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
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).  
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 12 on page 41.  
Setting Up Web  
Interface  
Management  
This section describes how you can set up web interface management  
over the network.  
Pre-requisites  
Ensure you have already set up the Switch with IP information as  
described in “Setting Up Overview” on page 32.  
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  
browser and platform combinations:  
Table 8 Supported Web Browsers and Platforms  
Windows  
2000  
Windows  
Windows XP Server 2003  
Red Hat  
Linux 9  
Solaris  
2.6  
Netscape 7.1  
Internet Explorer 5.5  
and 6.0  
Mozilla 1.0  
 
         
Setting Up SNMP Management  
49  
For the browser to operate the web interface correctly, JavaScript™ and  
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)  
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:  
The correct Management Information Bases (MIBs) are installed on the  
management workstation.  
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.  
 
       
50  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
Pre-requisites  
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 Guide” for more information.  
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 9.  
CAUTION: To protect your Switch from unauthorized access, you must  
change all three default passwords as soon as possible, even if you do not  
intend to actively manage your Switch  
Table 9 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  
The gettingStartedcommand on the CLI, or  
The security device user modifycommand on the CLI, or  
 
         
Default Users and Passwords  
51  
The Security > Device > User > Modify operation on the web interface.  
For more information about default users and passwords, refer to the  
“Superstack 3 Switch Management Interface Reference Guide” on the  
Switch CD-ROM.  
 
52  
CHAPTER 3: SETTING UP FOR MANAGEMENT  
 
PROBLEM SOLVING  
4
with the operation of your Switch. There is also an explanation of IP  
The topics covered are:  
Solving Problems Indicated by LEDs  
Solving Hardware Problems  
Solving Communication Problems  
Solving Software Upgrade 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.  
 
     
54  
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:  
testing it in another device  
connecting a working power cord to the ‘problem’ device  
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. If a port has failed its POST, its LED will flash  
green/yellow alternately to indicate that the port is disabled. Contact your  
supplier for advice.  
A link is connected and yet the Status LED for the port does not  
light  
Check that:  
The Switch and the device at the other end of the link (or cable) are  
connected securely.  
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 all ports where  
auto-negotiation is disabled and incorrect cables are being used  
(cross-over or straight).  
 
   
Solving Hardware Problems  
55  
Solving Hardware  
Problems  
SNMP fan fail trap hardware failure  
In the rare event of your Switch unit experiencing an SNMP fan fail trap  
hardware failure, refer to the suggested solution below.  
1 Power off the unit.  
2 Check that the air vents are not obstructed.  
4 If a further fan fail trap is received, return the unit.  
Error message indicating that the GBIC transceiver is invalid  
The Switch has identified that the GBIC does not meet the minimum  
requirements for the Switch and has disabled the port. To correct this  
problem, completely remove the GBIC and replace it with a 3Com  
approved GBIC. See “Approved GBIC Transceivers”on page 27.  
Error message indicating that the GBIC transceiver is faulty  
To correct this problem, completely remove the GBIC and then reinsert it.  
If the problem persists, contact 3Com Technical Support.  
Solving  
If you experience communication problems with the Switch, ensure that:  
Communication  
Problems  
The Switch IP address has been configured as described in Chapter 3  
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.  
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.  
 
       
56  
CHAPTER 4: PROBLEM SOLVING  
The IP address is split into two parts:  
The first part (‘192.168.100’ in the example) identifies the network on  
which the device resides  
The second part (‘.8’ in 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.  
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 house’ only.  
Solving Stack  
Formation  
Problems  
If you are having problems with correctly forming a stack, first ensure that  
Spanning Tree is enabled. If it is enabled, do the following:  
1 Power off all units in the stack.  
2 Check all the cable connections in the stack.  
3 Power on all units in the stack.  
 
     
Solving Software Upgrade Problems  
57  
Solving Software  
Upgrade Problems  
You can upgrade the management software of the Switch by using the  
System > Control > Software Upgrade operation in the Web Interface, or  
the system control softwareUpgradecommand in the  
command line interface. For details on these options, refer to the  
Management Interface Reference Guide supplied in HTML format on the  
CD-ROM that accompanies your Switch.  
If you have problems with your software upgrade, refer to the Problem  
Solving section in the Management Interface Reference Guide.  
 
   
58  
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 4200 Series.  
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 d’installer ou de retirer l’appareil.  
VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer  
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu  
befolgen.  
Sie müssen die folgenden Sicherheitsinformationen’ sorgfältig  
durchlesen, bevor Sie das Gerät installieren oder ausbauen.  
 
   
60  
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 4200 Series unit in a stack with  
SuperStack II or SuperStack 3 units that are narrower than the 4200  
Series, the Switch 4200 Series 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  
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  
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  
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:  
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  
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.  
 
   
Important Safety Information  
61  
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 4200 Series,  
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.  
 
62  
APPENDIX A: SAFETY INFORMATION  
WARNING: Fiber Optic ports - Optical Safety  
Never look at the transmit laser while it is powered-up. Never look  
directly at the fiber ports and fiber cable ends when they are  
powered-up.  
WARNING: Use of controls or adjustments of performance or  
procedures other than those specified herein may result in hazardous  
laser emissions.  
L’information 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 4200 doit être installée en dessous des  
unités Hub plus étroites.  
AVERTISSEMENT: Vous devez mettre l’appareil à la terre (à la masse) ce  
groupe.  
AVERTISSEMENT: Brancher l’unité à une source de courant mise à la  
terre pour assurer la conformité aux normes de sécurité.  
 
   
L’information de Sécurité Importante  
63  
AVERTISSEMENT: Cordon électrique:  
Il doit être agréé ans le pays d'utilisation:  
Etats-Unis et  
Canada  
Le cordon doit avoir reçu l'homologation des UL et un  
certificat de la CSA  
Le cordon souple doit respecter, à titre minimum, les  
spécifications suivantes :  
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  
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  
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  
l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil  
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.  
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  
 
64  
APPENDIX A: SAFETY INFORMATION  
connexion portant l'appellation Neutre et avec raccordement direct à la  
terre (masse).  
AVERTISSEMENT: Points d’accès 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 l’unité 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: Ports pour fibres optiques – sécurité sur le plan  
optique  
Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais  
directement le port à fibres optiques et les embouts de câbles à fibres  
optiques tant qu'ils sont sous tension.  
AVERTISSEMENT: L'utilisation de contrôles, de réglages de  
performances ou de procédures autres que ceux qui sont spécifiés au sein  
du présent document risquent d'entraîner l'exposition à des  
rayonnements laser dangereux.  
Wichtige Sicherheitsinformationen  
VORSICHT: Die Installation und der Ausbau des Geräts darf nur durch  
Fachpersonal erfolgen.  
VORSICHT: Wenn die Switch 4200 Einheit in einer Stapel mit anderen  
SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch 4200  
Einheit unter die schmaleren Hub Einheiten eingebaut werden.  
VORSICHT: Das Gerät muß geerdet sein.  
 
   
Wichtige Sicherheitsinformationen  
65  
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.  
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  
Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)  
sein und die Aufschrift <HAR> oder <BASEC> tragen.  
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.  
 
66  
APPENDIX A: SAFETY INFORMATION  
VORSICHT: Faseroptikanschlüsse – Optische Sicherheit  
Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet  
ist. Niemals direkt auf die Faseransnchlüsse und auf die Faserkabelenden  
schauen, während diese eingeschaltet sind.  
VORSICHT: Die Verwendung von Steuerelementen oder die Anpassung  
von Leistungen und Verfahren in anderer als der hierin genannten Weise  
kann zu gefährlichen Laseremissionen führen.  
 
PIN-OUTS  
B
Null Modem Cable  
9-pin to RS-232 25-pin  
Switch 4200  
Cable connector: 9-pin female  
PC/Terminal  
Cable connector: 25-pin male/female  
only required if screen  
Screen  
TxD  
Shell  
1
Screen  
3
2
5
7
8
3
RxD  
always required  
RxD  
2
TxD  
Ground  
RTS  
7
Ground  
RTS  
4
20  
DTR  
CTS  
required for handshake  
DSR  
DCD  
DTR  
6
1
4
5
6
8
CTS  
DSR  
DCD  
PC-AT Serial Cable  
9-pin to 9-pin  
Switch 4200  
Cable connector: 9-pin female  
PC-AT Serial Port  
Cable connector: 9-pin female  
only required if screen  
Screen  
DTR  
Shell  
Shell  
Screen  
DCD  
RxD  
Required for handshake  
4
3
2
8
5
1
2
3
4
5
always required  
TxD  
RxD  
TxD  
required for handshake  
always required  
CTS  
DTR  
Ground  
DSR  
RTS  
Ground  
DSR  
RTS  
6
7
1
6
7
8
required for handshake  
DCD  
CTS  
 
               
68  
APPENDIX B: PIN-OUTS  
Modem Cable  
9-pin to RS-232 25-pin  
Switch 4200  
Cable connector: 9-pin female  
RS-232 Modem Port  
Cable connector: 25-pin male  
Screen  
TxD  
Shell  
1
2
3
4
5
Screen  
TxD  
3
2
7
8
6
RxD  
RxD  
RTS  
RTS  
CTS  
CTS  
DSR  
Ground  
DCD  
DTR  
DSR  
Ground  
DCD  
DTR  
6
5
1
4
7
8
20  
RJ-45 Pin  
Assignments  
Pin assignments for ports configured as MDI and MDIX are given in  
Table 10 and Table 11.  
Table 10 Pin assignments  
Pin Number  
10/100  
1000  
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  
69  
Table 11 Pin assignments  
Pin Number  
10/100  
1000  
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-  
 
   
70  
APPENDIX B: PIN-OUTS  
 
TECHNICAL SPECIFICATIONS  
C
Switch 4226T  
(3C17300)  
Physical Dimensions  
Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)  
Weight: 2.4 kg (5.3 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)  
10–95% 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 60950, EN60950, CSA 22.2 No. 60950, 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, VCCI Class A, CNS 13438 Class A,  
EN61000-3-2, EN61000-3-3  
Immunity  
EN 55024  
Heat Dissipation  
Power Supply  
AC Line Frequency  
Input Voltage  
Current Rating  
(continued)  
40 watts maximum (136 Btu/h maximum)  
50/60 Hz  
90–240 VAC  
2.3 A (amps)(maximum)  
 
       
72  
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 4250T (3C17302)  
73  
Switch 4250T  
(3C17302)  
Physical Dimensions  
Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)  
Weight: 2.83 kg (6.23 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)  
10–95% 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  
AC Line Frequency  
Input Voltage  
60 watts maximum (205 Btu/h maximum)  
50/60 Hz  
90–240 VAC  
Current Rating  
Standards Supported  
2.3 A (amps)(maximum)  
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)  
 
 
74  
APPENDIX C: TECHNICAL SPECIFICATIONS  
Switch 4228G  
(3C17304)  
Physical Dimensions  
Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)  
Weight: 2.73 kg (6.00 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)  
10–95% 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  
AC Line Frequency  
Input Voltage  
60 watts maximum (205 Btu/h maximum)  
50/60 Hz  
90–240 VAC  
Current Rating  
Standards Supported  
2.3 A (amps)(maximum)  
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)  
 
 
OBTAINING SUPPORT FOR YOUR  
PRODUCT  
D
Register Your  
Product  
Warranty and other service benefits start from the date of purchase, so it  
is important to register your product quickly to ensure you get full use of  
the warranty and other service benefits available to you.  
Warranty and other service benefits are enabled through product  
registration. Register your product at http://eSupport.3com.com/.  
3Com eSupport services are based on accounts that you create or have  
authorization to access. First time users must apply for a user name and  
password that provides access to a number of eSupport features  
including Product Registration, Repair Services, and Service Request. If  
you have trouble registering your product, please contact 3Com Global  
Services for assistance.  
Purchase  
Value-Added  
Services  
To enhance response times or extend warranty benefits, contact 3Com or  
your authorized 3Com reseller. Value-added services like 3Com ExpressSM  
and GuardianSM can include 24x7 telephone technical support, software  
upgrades, onsite assistance or advance hardware replacement.  
Experienced engineers are available to manage your installation with  
minimal disruption to your network. Expert assessment and  
implementation services are offered to fill resource gaps and ensure the  
success of your networking projects. More information on 3Com  
maintenance and Professional Services is available at  
Contact your authorized 3Com reseller or 3Com for a complete list of the  
value-added services available in your area.  
 
         
76  
APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT  
Troubleshoot  
Online  
You will find support tools posted on the 3Com web site at  
3Com Knowledgebase helps you troubleshoot 3Com products. This  
query-based interactive tool is located at  
http://knowledgebase.3com.com and contains thousands of technical  
solutions written by 3Com support engineers.  
Access Software  
Downloads  
Software Updates are the bug fix / maintenance releases for the version  
of software initially purchased with the product. In order to access these  
Software Updates you must first register your product on the 3Com web  
First time users will need to apply for a user name and password. A link to  
software downloads can be found at http://eSupport.3com.com/, or  
under the Product Support heading at http://www.3com.com/  
Software Upgrades are the feature releases that follow the software  
version included with your original product. In order to access upgrades  
and related documentation you must first purchase a service contract  
from 3Com or your reseller.  
Telephone Technical To enable telephone support and other service benefits, you must first  
Support and Repair  
register your product at http://eSupport.3com.com/  
Warranty and other service benefits start from the date of purchase, so it  
is important to register your product quickly to ensure you get full use of  
the warranty and other service benefits available to you.  
When you contact 3Com for assistance, please have the following  
information ready:  
Product model name, part number, and serial number  
Proof of purchase, if you have not pre-registered your product  
A list of system hardware and software, including revision level  
Diagnostic error messages  
Details about recent configuration changes, if applicable  
 
     
Contact Us  
77  
To send a product directly to 3Com for repair, you must first obtain a  
return authorization number (RMA). Products sent to 3Com, without  
authorization numbers clearly marked on the outside of the package, will  
be returned to the sender unopened, at the senders expense. If your  
product is registered and under warranty, you can obtain an RMA  
number online at http://eSupport.3com.com/. First time users will  
need to apply for a user name and password.  
Contact Us  
3Com offers telephone, e-mail and internet access to technical support  
and repair services. To access these services for your region, use the  
appropriate telephone number, URL or e-mail address from the list below.  
Telephone numbers are correct at the time of publication. Find a current  
directory of contact information posted on the 3Com web site at  
Country  
Telephone Number  
Country  
Telephone Number  
Asia, Pacific Rim Telephone Technical Support and Repair  
Australia  
Hong Kong  
India  
1 800 678 515  
800 933 486  
+61 2 9424 5179 or  
000800 650 1111  
001 803 61009  
00531 616 439 or  
03 3507 5984  
Philippines  
1235 61 266 2602 or  
1800 1 888 9469  
800 810 3033  
800 6161 463  
080 333 3308  
00801 611 261  
001 800 611 2000  
P.R. of China  
Singapore  
S. Korea  
Taiwan  
Thailand  
Indonesia  
Japan  
Malaysia  
New Zealand  
Pakistan  
1800 801 777  
0800 446 398  
+61 2 9937 5083  
You can also obtain support in this region using the following e-mail: apr_technical_support@3com.com  
Or request a repair authorization number (RMA) by fax using this number:  
+ 65 543 6348  
Europe, Middle East, and Africa Telephone Technical Support and Repair  
From anywhere in these  
regions, call:  
+44 (0)1442 435529  
From the following countries, you may use the numbers shown:  
 
 
78  
APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT  
Country  
Telephone Number  
Country  
Telephone Number  
Austria  
Belgium  
0800 297 468  
0800 71429  
800 17309  
0800 113153  
0800 917959  
0800 182 1502  
06800 12813  
1 800 553 117  
1800 945 3794  
800 879489  
Luxembourg  
Netherlands  
Norway  
800 23625  
0800 0227788  
800 11376  
00800 441-1 357  
800 831416  
0800 995 014  
900 938 919  
020 795 482  
0800 553 072  
0800 096 3266  
Denmark  
Finland  
France  
Germany  
Hungary  
Ireland  
Israel  
Poland  
Portugal  
South Africa  
Spain  
Sweden  
Switzerland  
U.K.  
Italy  
You can also obtain support in this region using the following URL:  
Latin America Telephone Technical Support and Repair  
Antigua Barbuda  
Argentina Local Number  
Argentina  
Argentina  
Aruba  
Bahamas  
Barbados  
Belize  
Bermuda  
Bolivia  
Brazil Local Number  
Brazil  
British Virgin Islands  
Cayman Islands  
Chile  
Columbia Local Number  
Colombia  
Costa Rica  
Curacao  
Dominica  
Dominique  
Equador  
AT&T +800 988 2112  
54 11 5556 3200  
0 810 444 3COM  
810 44 32 66  
AT&T +1 800 998 2112  
1 800 998 2112  
Guadalupe  
Guatemala  
Guyana  
Haiti  
Honduras  
Jamaica  
Mexico Local Number  
Mexico  
Mexico  
Monserrat  
Nicaragua  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
52 55 52 01 00 04  
1 800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
55 11 5643 2700  
01 800 849CARE  
01 800 849 2273  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
800 13 266  
Panama  
Paraguay  
Peru  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
57 1 592 5000  
Puerto Rico  
Saba Anquila  
St Kitts Neives  
St Lucia  
St Vincent  
Suriname  
Trinidad and Tobago  
Turks and Caycos  
Uruguay - Montevideo  
Venezuela  
Virgin Islands  
800 011 3266  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
AT&T +800 998 2112  
El Salvador  
French Guinea  
Grenada  
You can also obtain support in this region using the following:  
Spanish speakers, enter the URL:  
Portuguese speakers, enter the URL:  
English speakers in Latin America should send e-mail to:  
 
Contact Us  
79  
Country  
Telephone Number  
Country  
Telephone Number  
US and Canada Telephone Technical Support and Repair  
1 800 876 3266  
 
80  
APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT  
 
INDEX  
81  
F
factory defaults 18  
G
GBIC  
GBIC ports 14  
10/100/1000BASE-T ports 14  
3C number 22  
H
hardware features 12  
A
access levels of default users 50  
automatic setup 42  
3Com Network Supervisor 42  
I
installing the Switch 19  
prerequisites 20  
IP addressing  
IP configuration 33  
B
choosing 48  
L
LEDs 15  
C
cable  
maximum length 14  
pin-outs 67  
M
MAC address of the Switch 22  
management  
methods 45  
CD-ROM 10  
preparing for 34  
manual setup  
command line interface  
conventions  
notice icons, About This Guide 8  
text, About This Guide 8  
P
D
passwords  
default  
of default users 50  
pin assignments  
modem cable 68  
null modem cable 67  
RJ45 68  
RJ45 1000BASE-T 69  
serial cable 67  
pin-outs 67  
settings 18  
users 50  
E
Ethernet address of the Switch 22  
ports  
 
 
82  
rack mounting 21  
power socket 17  
serial number 22  
size 71  
powering-up a Switch 4200 24  
problem solving 53  
stacking 23  
weight 71  
system specifications 71  
T
stack formation problems 56  
product name 22  
troubleshooting 53  
U
R
unit information label 22  
RPS 17  
W
Web browsers  
choosing 48  
web interface  
choosing a browser 48  
web interface management 46  
setting up 48  
S
safety information  
Simple Network Management Protocol. See SNMP  
SNMP 49  
SNMP management 46  
socket  
RPS 17  
Switch  
Switch 4200  
3C number 22  
console port 17  
dimensions 71  
Ethernet address 22  
features 12  
installation 19, 20  
MAC address 22  
power socket 17  
powering-up 24  
product name 22  
 
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:  
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.  
 
 

Aastra Telecom IP Phone 57I C53I User Manual
Acer Personal Computer 6800 Series User Manual
Adder Technology Network Card 2XPRO User Manual
Aiphone Intercom System IP EWST User Manual
Amcor Air Cleaner AM 60 User Manual
Ativa Chipper CS2171 User Manual
Audiovox Automobile Alarm PRO 9233N User Manual
Barco Frozen Dessert Maker K5960008 03 User Manual
BB Electronics TV Converter Box 232SPS2 User Manual
Behringer Network Router ADA8200 User Manual