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3Com 4400 (3C17203) Switch User Manual

1. 8 ABOUT THIS GUIDE About Your CD ROM The CD ROM conta ins the following a Online documentation for the Switch 4400 refer to Related Documentation on page 9 for details m 3Com Network Supervisor a powerful and easy to use network management platform a A number of other useful applications 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 http www 3com com Conventions Table 1 and Table 2 Table 1 Notice Icons list conventions that are used throughout this guide Icon Notice Type Description gt Information 1 Caution f Warning note Information that describes important features or instructions Information that alerts you to potential loss of data or potential damage to an application system or device 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 lt password gt In this example you must supply a password for lt password gt Commands The word command means that you must
2. Europe La prise secteur doit tre conforme aux normes CEE 7 7 SCHKO m LE cordon secteur doit porter la mention lt HAR gt ou lt BASEC gt et doit tre de type HO3VVF3GO 75 minimum Suisse La prise m le 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 entr e d appareil EN60320 CEI 320 AVERTISSEMENT La prise secteur doit se trouver proximit de l appareil et son acc s doit tre facile Vous ne pouvez mettre l appareil hors circuit qu en d branchant son cordon lectrique au niveau de cette prise AVERTISSEMENT l appareil fonctionne une tension extr mement basse de s curit qui est conforme la norme CEI 60950 Ces conditions ne sont maintenues que si l quipement auquel il est raccord fonctionne dans les m mes conditions AVERTISSEMENT France et P rou uniquement Ce groupe ne peut pas tre aliment par un dispositif imp dance la terre Si vos alimentations sont du type imp dance la terre ce groupe doit tre aliment par une tension de 230 V 2 P T par le biais d un transformateur d isolement rapport 1 1 avec un point secondaire de connexion portant l appellation Neutre et avec raccordement direct la terre masse AVERTISSEMENT Points d acc s RJ 45 Ceux ci sont prot g s par des prises de donn es Ils ne pe
3. Solving Communication Problems If you experience communication problems with the Switch ensure that The Switch IP address and Management VLAN ID has been configured as described in Chapter 3 a H 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 a The Switch 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 O and 255 An example IP address is 192 168 100 8 The IP address is split into two parts a The first part 192 168 100 in the example identifies the network on which the device resides m 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
4. Standards 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 UL60950 EN60950 CSA 22 2 No 60950 IEC 60950 EMC 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 EN61000 3 2 EN61000 3 3 Immunity EN 55024 Heat Dissipation 80 watts maximum 275 BTU hour maximum Power Supply AC Line Frequency Input Voltage Options Current Rating 50 60 Hz 90 240 VAC 2 3 A amps maximum Switch 4400 FX 81 Standards Supported SNMP SNMP protocol RFC 1157 MIB II RFC 1213 Bridge MIB RFC 1493 RMON MIB II RFC 2021 Remote Monitoring MIB RFC 1757 MAU MIB RFC 2239 MIB II Traps RFC 1215 RS232 RFC 1659 Interfaces RFC 2233 Ether like MIB RFC 2665 MAU MIB RFC 2668 Bridge extensions RFC 2674 Terminal Emulation Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 ARP RFC 826 TFTP RFC 783 DHCP RFC 2131 RFC 2132 RFC 1534 BOOTP RFC 951 RFC 1497 Network Login IEEE 803 1x RADIUS RFC 2618 2620 Link aggregation IEEE 802 3ad Switch 4400 FX Physical Dimensions Height 44 mm 1 7 in x Width 440 mm 17 3 in x Depth 274 mm 10 8 in Weight 2 8 kg 6 2 lbs Environmental Requirements Operating Temperature Storage Temperature
5. Inc UNIX is a registered trademark in the United States and other countries licensed exclusively hrough X Open Company Ltd EEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers Inc Netscape Navigator is a registered trademark of Netscape Communications avaScript is a trademark of Sun Microsystems All other company and product names may be trademarks of the respective companies with which they are associated ENVIRONMENTAL STATEMENT It is the policy of 3Com Corporation to be environmentally friendly in all operations To uphold our policy we are committed to Establishing environmental performance standards that comply with national legislation and regulations Conserving energy materials and natural resources in all operations Reducing the waste generated by all operations Ensuring that all waste conforms to recognized environmental standards Maximizing the recyclable and reusable content of all products Ensuring that all products can be recycled reused and disposed of safely Ensuring that all products are labelled according to recognized environmental standards Improving our environmental record on a continual basis End of Life Statement 3Com processes allow for the recovery reclamation and safe disposal of all end of life electronic components Regulated Materials Statement 3Com products do not contain any hazardous or ozone depleting material Environmental Stateme
6. ATA Business Phone 3C 10400 m Network Jacks 3Com NJ90 3CNJ90 3Com NJ95 3CNJ95 3Com NJ100 3CNJ100 3CNJ100 CRM 3Com NJ105 3CNJ105 a 3Com NJ105 forwarding 3CNJ105 3Com NJ200 3CNJ200 3CNJ200 CRM 3Com NJ200 forwarding 3CNJ200 3Com NJ205 3CNJ205 a 3Com NJ205 forwarding 3CNJ205 For the latest list ofsupported devices go to the product page on the 3Com web site http www 3com com For further information about Power Over Ethernet refer to Power Management and Control in the Switch Implementation Guide supplied on the CD ROM that accompanies your Switch Power over Ethernet management is available using the web interface or the command line interface CLI All of the ports on the front of the Switch 4400 4400 SE and 4400 PWR are Auto MDIX 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 enabled per port and if auto negotiation is enabled If auto negotiation is disabled all the Switch ports are configured as MDIX cross over If you want to make a connection to another MDIX port you need a cross over cable Many ports on workstations and servers are configured as MDI straight through If you want to make a Choosing the Correct Cables Switch 4400 FX The Powe
7. ERDE lag ENK Ed COMBIIRAAMBDENRe BT Ob TER EIERE
8. Operating Humidity 0 to 40 C 32 to 104 F 40 to 70 C 40 to 158 F 10 95 relative humidity non condensing Standards 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 UL60950 EN60950 CSA 22 2 No 60950 IEC 60950 EMC Emissions CISPRR 22 Class A EN55022 Class A FCC Part 15 Subpart B Class A ICES 003 Class A AS NZS 3548 Class A EN61000 3 2 EN61000 3 3 Immunity EN 55024 Heat Dissipation 80 watts maximum 275 BTU hour maximum Power Supply AC Line Frequency Input Voltage Options Current Rating 50 60 Hz 90 240 VAC 2 3 A amps maximum 82 APPENDIX C TECHNICAL SPECIFICATIONS continued Standards Supported SNMP SNMP protocol RFC 1157 MIB II RFC 1213 Bridge MIB RFC 1493 RMON MIB II RFC 2021 Remote Monitoring MIB RFC 1757 MAU MIB RFC 2239 MIB II Traps RFC 1215 RS232 RFC 1659 Interfaces RFC 2233 Ether like MIB RFC 2665 MAU MIB RFC 2668 Bridge extensions RFC 2674 Terminal Emulation Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 ARP RFC 826 TFTP RFC 783 DHCP RFC 2131 RFC 2132 RFC 1534 BOOTP RFC 951 RFC 1497 Network Login IEEE 803 1x RADIUS RFC 2618 2620 Link aggregation IEEE 802 3ad D OBTAINING SUPPORT FOR YOUR PRODUCT
9. Stapel mit anderen SuperStack 3 Hub Einheiten eingebaut werden soll mu die Switch 4400 Einheit unter die schmaleren Hub Einheiten eingebaut werden VORSICHT Das Ger t mu geerdet sein VORSICHT Das Ger t mu an eine geerdete Steckdose angeschlossen werden die europ ischen Sicherheitsnormen erf llt VORSICHT Der Anschlu kabelsatz mu mit den Bestimmungen des Landes bereinstimmen in dem er verwendet werden soll A A AN A Wichtige Sicherheitsinformationen 71 VORSICHT Der Ger testecker der Anschlu an das Ger t nicht der Wandsteckdosenstecker mu eine passende Konfiguration f r einen Ger teeingang gem EN60320 1EC320 haben VORSICHT Die Netzsteckdose mu in der N he des Ger ts und leicht zug nglich sein Die Stromversorgung des Ger ts kann nur durch Herausziehen des Ger tenetzkabels aus der Netzsteckdose unterbrochen werden VORSICHT Europe a Das Netzkabel mu vom Typ HO3VVF3GO 75 Mindestanforderung sein und die Aufschrift lt HAR gt oder lt BASEC gt tragen a Der Netzstecker mu die Norm CEE 7 7 erf llen SCHUKO VORSICHT Der Betrieb dieses Ger ts erfolgt unter den SELV Bedingungen Sicherheitskleinstspannung gem IEC 60950 Diese Bedingungen sind nur gegeben wenn auch die an das Ger t angeschlossenen Ger te unter SELV Bedingungen betrieben werden VORSICHT RJ 45 Porte Diese Porte sind gesch tzte Datensteckdosen Sie d rfen weder wie normale traditionelle Te
10. Switch passes its Power On Self Test and continues to operate normally even if one or more ports are disabled A link is connected and yet the Status LED for the port does not light Check that m The Switch and the device at the other end of the link or cable are connected securely a The devices at both ends of the link are powered up a The quality of cable is satisfactory Solving Hardware Problems 59 m Auto negotiation settings are the same at both ends Auto negotiation problems will occur with 10BASE T or 100BASE T where auto negotiation is disabled and incorrect cables are being used cross over or straight Auto negotiation problems will occur with fiber if a The Receiver RX and Transceiver TX cable connectors are swapped Fibers are broken a Auto negotiation differs at either end a link appears at the fixed end and not at the auto negotiation end The Unit LED is flashing green The Switch unit physically forms a stack with other Switch 4400 units but cannot be managed as part of that stack because one or more units have not been upgraded to software version 2 0 or later You must upgrade each unit in the stack to this software version which is available on the CD ROM that accompanies your Switch Port LED Status LED is flashing yellow 3C17205 only The Switch has a Power over Ethernet error You must press the LED Mode button to see which ports are affected and to see whether it is a fault
11. accessing the management software to manage a Switch It covers the following topics m Setting Up Overview a Manually Configuring IP Information a Viewing Automatically Configured IP Information a Methods of Managing a Switch a Setting Up Command Line Interface Management m Setting Up Command Line Interface Management using SSH a Setting Up Web Interface Management a Setting Up SNMP Management Default Users and Passwords 36 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 summarized in Figure 9 Detailed procedural steps are contained in the sections that follow In brief you need to Prepare for your chosen method of management Figure 9 Initial Switch Setup and Management Flow diagram Configure IP information manually for your Switch or view the automatically configured IP information 2 3 Power Up the Switch a S a E E IP Information is automatically configured 2 See page 37 4 Do you want to manually gt Yes 4 configure the IP information No 2 5 7 2 How do you want to connect to the Switch Suen EE the SEEN 5 configured IP information 2 y a Connect to a front Connect to the console Use 3Com Network Connect t
12. device configuration logout Logout of the Command Line Interface physicallnterface Administer physical interfaces protocol Administer protocols security Administer security system Administer system level functions traffichanagement Administer traffic management Select menu option Jj At the Select menu option prompt enter the protocol ip interface summary command Atthe Select IP interfaces prompt enter all A summary of the automatically allocated IP information is displayed Make a note of the Network IP Address Methods of Managing a Switch 49 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 49 If you do not intend to use the command line interface via the console port to manage the Switch you can logout disconnect the serial cable and close the terminal emulator software Methods of Managing a Switch Command Line Interface Management 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 a Command line interface management a Command line interface management using SSH m Web interface management m SNMP management Each Switch has a command line interface CLI that allows you to manage the Switch from a workstation either locally via a console port connection see Figure 16 or remot
13. 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 Related Documentation 9 Table 2 Text Conventions continued Convention Description The words enter When you see the word enter in this guide you must type and type something and then press Return or Enter Do not press Return or Enter when an instruction simply says type Keyboard key names If you must press two or more keys simultaneously the key names are linked with a plus sign Example Press Ctrl Alt Del Words in italics Italics are used to 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 alist of the features supported by the Switch a summary of the web interface and command line interface commands for the Swi
14. following measures m Reorient the receiving antenna m Relocate the equipment with respect to the receiver m Move the equipment away from the receiver m 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 num rique de la classe A respecte toutes les exigences du Reglement sur le mat riel brouilleur du Canada CE STATEMENT EUROPE 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 VCCI STATEMENT REI PERE S BEE E VCCI DEEI EI Sect CORE CARER CRAT o
15. installation or removal of components or any maintenance procedures on the Switch 4400 AN 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 AN AVERTISSEMENT Les avertissements pr sentent des consignes que vous devez respecter pour garantir votre s curit personnelle Vous devez respecter attentivement toutes les consignes Nous vous demandons de lire attentivement les consignes suivantes de s curit avant d installer ou de retirer l appareil AN VORSICHT Warnhinweise enthalten Anweisungen die Sie zu Ihrer eigenen Sicherheit befolgen m ssen Alle Anweisungen sind sorgf ltig zu befolgen Sie m ssen die folgenden Sicherheitsinformationen sorgf ltig durchlesen bevor Sie das Ger t installieren oder ausbauen Power Cord Set Japan BRIS RAL PAERD OT CEE EE BRIERE CUBUCERIERL CDOT OCEAN 66 APPENDIX A SAFETY INFORMATION Important Safety Information SSP gt gt WARNING Installation and removal of the unit must be carried out by qualified personnel only WARNING If installing the Switch 4400 in a stack with SuperStack Il or SuperStack 3 units that are narrower than the 4400 the Switch 4400 unit must be installed below the narrower units WARNING The unit must be earthed grounded WARNING Connect the unit to an earthed power supply to e
16. over Ethernet error Off Port LEDs are operating in normal mode Power Utilization LEDs 3C17205 only Green 4 LEDs showing total power being delivered as a percentage of maximum possible Switch 4400 Rear View Detail 19 Switch 4400 Rear View Detail Figure 5 Switch 4400 all models rear view Supply Data Warning Label Expansion Module Slots Power Socket Console Port Power Socket Redundant Power System Socket Console Port Expansion Module Slots A Redundant Power System Socket The Switch automatically adjusts its power setting to any supply voltage in the range 90 240 VAC To protect against internal power supply failure you can use this socket to connect a Switch 4400 to a SuperStack 3 Advanced Redundant Power System RPS See Connecting a Redundant Power System on page 30 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 You can use these slots to install Expansion Modules These allow the Switch to support various forms of connection and add extra functionality to your Switch For example you can install a Cascade module to enable the Switch to be stacked with other Switches Please note that Power over E
17. rack mounting SS eo Ger ac o eed Gi 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 m The 3Com product name of the Switch m The 3Com 3C number of the Switch m The unique MAC address Ethernet address of the Switch m The serial number of the Switch You may need this information for fault reporting purposes Placing Units On Top of Each Other 27 Placing Units On If the Switch units are free standing up to eight units can be placed one Top of Each Other 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
18. software for more information 48 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 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 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 At the login and password prompts enter admin as 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 15 Figure 15 Example top level command line interface menu Menu options 3Com SuperStack 3 Switch 4Xxx bridge Administer bridge wide parameters feature Administer system features gettingStarted Basic
19. supply power due to unit over budget denyLowPriority MIB state Yellow Power over Ethernet error no power supplied on port Off No power is being delivered Status Yellow flashing Power over Ethernet POST error on port Flash rate is 4 Hz Module LEDs Packet Refer to the user documentation accompanying the module if installed Status Refer to the user documentation accompanying the module if installed Off There is no module installed in the expansion module slot Yellow flashing The module has failed and has been automatically disabled fast The Switch passes its Power On Self Test and continues to operate normally even if one or more modules are disabled Unit LEDs 1 8 Green When the Switch forms a stack with other Switch 4400 units the LED indicates the position of the unit in the stack and that a link is present When the Switch is stand alone and not part of a stack LED 1ison Green Yellow When a software upgrade is in progress the LEDs of the unit rotational that is being upgraded rotate in an clockwise and anti clockwise sequence Green The Switch physically forms a stack with other Switch 4400 flashing units but cannot be managed as part of that stack until all units have been upgraded to software version 2 0 or later Off A fault has occurred Port LED Status LED 3C17205 only Green Port LEDs are operating in power mode Yellow flashing Port LEDs are operating in normal mode One or more ports has a Power
20. support the following 3Com 802 3af equipment m Wireless 3Com 11 Mbps Wireless LAN Access Point 8000 3CRWE80096B 3Com 11 Mbps Wireless LAN Access Point 8200 3CRWE820096A 3Com 11 Mbps Wireless LAN Access Point 8500 3CRWE850096A 3Com 11 Mbps Wireless LAN Access Point 8700 3CRWE870096A 3Com Wireless LAN Building to Building Bridge 3CRWE91096B a Voice Over IP Telephones 3Com 11 Mbps Wireless LAN Access Point 8000 3CRWE80096B 3Com 11 Mbps Wireless LAN Access Point 8200 3CRWE820096A 3Com 11 Mbps Wireless LAN Access Point 8500 3CRWE850096A 3Com 11 Mbps Wireless LAN Access Point 8700 3CRWE870096A 3Com Wireless LAN Building to Building Bridge 3CRWE91096B a The following 3Com NBX phones are also supported using the 3Com NBX VoIP Phone Module 3CNJVOIPMOD NBX 3Com NBX 1102 Business Phone 3C 10121 3Com NBX 1102B Business Phone 3C10281B 3Com NBX 1102PE Business Phone 3C10281PE 3Com NBX 2101Basic Phone 3C10248B 3Com NBX 2101PE Basic Phone 3C 10248PE 3Com NBX 2102 Business Phone 3C10226A 3Com NBX 2102IR Business Phone with IR 3C 10228IRA 3Com NBX 2102B Business Phone 3C10226B 3Com NBX 2102IRB Business Phone with IR 3C10228IRB 32 CHAPTER 2 INSTALLING THE SWITCH gt Choosing the Correct Cables Switch 4400 4400 SE and 4400 PWR gt 3Com NBX 2102PE Business Phone 3C10226PE 3Com NBX 2102PEIR Business Phone with IR 3C10228RPE 3Com NBX 3102 Business Phone 3C10402A 3Com NBX
21. to have the following so that you can manually set up the Switch with IP information P address subnet mask a default gateway management VLAN ID normally set to the default value 1 Connecting the Workstation to the Switch Connect the workstation to the console port using a standard null modem cable as shown in Figure 12 Figure 12 Connecting a workstation to the Switch via the console port Standard Null Modem Cable Console Port Connection Workstation with terminal emulation EE software installed Switch 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 44 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 a 19 200 baud a 8 data bits no parity a 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 inter
22. 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 gt Solving Software Upgrade Problems 63 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 range 192 168 0 0 to 192 168 255 255 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 Software Upgrade Problems You can upgrade the management software of the Switch by using the System gt Control gt Software Upgrade operation in the Web Interface or the system control softwareUpgrade command 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 64 CHAPTER 4 PROBLEM SOLVING A SAFETY INFORMATION You must read the following safety information before carrying out any
23. 0 PWR 32 Choosing the Correct Cables Switch 4400 FX 33 SETTING UP FOR MANAGEMENT Setting Up Overview 36 IP Configuration 37 Preparing for Management 38 Manually Configuring IP Information 39 Connecting to a Front Panel Port 39 Connecting to the Console Port 42 Viewing Automatically Configured IP Information 46 Using 3Com Network Supervisor 46 Connecting to the Console Port 46 Methods of Managing a Switch 49 Command Line Interface Management 49 Command Line Interface Management using SSH 50 Web Interface Management 50 SNMP Management 50 Setting Up Command Line Interface Management 50 CLI Management via the Console Port 51 CLI Management over the Network 51 Setting Up Command Line Interface Management using SSH 52 Setting Up Web Interface Management 53 Pre requisites 53 Web Management Over the Network 54 Setting Up SNMP Management 54 Pre requisites 55 Default Users and Passwords 55 Changing Default Passwords 55 PROBLEM SOLVING Solving Problems Indicated by LEDs 58 Solving Hardware Problems 59 Solving Communication Problems 62 Solving Software Upgrade Problems 63 SAFETY INFORMATION Power Cord Set Japan 65 Important Safety Information G L information de S curit Importante 68 Wichtige Sicherheitsinformationen 70 PIN OUTS Null Modem Cable 73 PC AT Serial Cable 73 Modem Cable 74 RJ 45 Pin Assignments 74 TECHNICAL SPECIFICATIONS Switch 4400 24 port and Switch 4400 SE 77 Switch 4400 PWR 24
24. 12 Martinique Belize 52 5 201 0010 Mexico Bermuda 1 800 998 2112 Nicaragua Bonaire 1 800 998 2112 Panama Brazil 0800 13 3COM Paraguay Cayman 1 800 998 2112 Peru Chile AT amp T 800 998 2112 Puerto Rico Colombia AT amp T 800 998 2112 Salvador Costa Rica AT amp T 800 998 2112 Trinidad and Tobago Curacao 1 800 998 2112 Uruguay Ecuador AT amp T 800 998 2112 Venezuela Dominican Republic AT amp T 800 998 2112 Virgin Islands You can also obtain support in this region using the following Spanish speakers enter the URL http lat 3com com lat support form html Portuguese speakers enter the URL http lat 3com com br support form html English speakers in Latin America should send e mail to lat_support_anc 3com com AT amp T 800 998 2112 57 1 657 0888 AT amp T 800 998 2112 1 800 998 2112 571 657 0888 01 800 849CARE AT amp T 800 998 2112 AT amp T 800 998 2112 54 11 4894 1888 AT amp T 800 998 2112 800 998 2112 AT amp T 800 998 2112 800 998 2112 AT amp T 800 998 2112 AT amp T 800 998 2112 57 1 657 0888 _ _ US and Canada Telephone Technical Support and Repair 1 800 876 3266 INDEX Numbers 3C number 26 A access levels of default users 55 automatic setup 46 3Com Network Supervisor 46 console port 46 browsers choosing 53 C cable choosing the correct 32 pin outs 73 cascade cable 27 Cascade Extender Kit 27 Cascade Stacking Kit 27 CD ROM 10 command line interface managem
25. 7 Taiwan New Zealand 0800 446 398 Thailand Pakistan 61 2 9937 5083 1235 61 266 2602 or 1800 1 888 9469 10800 61 00137 or 021 6350 1590 or 00800 0638 3266 800 6161 463 080 333 3308 00801 611 261 001 800 611 2000 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 44 0 1442 435529 regions call From the following countries you may use the numbers shown Austria 01 7956 7124 Luxembourg Belgium 070 700 770 Netherlands Denmark 7010 7289 Norway Finland 01080 2783 Poland France 0825 809 622 Portugal Germany 01805 404 747 South Africa Hungary 06800 12813 Spain Ireland 01407 3387 Sweden Israel 1800 945 3794 Switzerland Italy 199 161346 U K You can also obtain support in this region using the following URL http emea 3com com support email html 342 0808128 0900 777 7737 815 33 047 00800 441 1357 707 200 123 0800 995 014 9 021 60455 07711 14453 08488 50112 0870 909 3266 86 APPENDIX D OBTAINING SUPPORT FOR YOUR PRODUCT Telephone Number Country Telephone Number Country Latin America Telephone Technical Support and Repair Antigua 1 800 988 2112 Guatemala Argentina 0 810 444 3COM Haiti Aruba 1 800 998 2112 Honduras Bahamas 1800 998 2112 Jamaica Barbados 1 800 998 21
26. BTU hour maximum Power Supply AC Line Frequency Input Voltage Options Current Rating continued 50 60 Hz 90 240 VAC 2 3 A amps maximum 78 APPENDIX C TECHNICAL SPECIFICATIONS Standards Supported SNMP SNMP protocol RFC 1157 MIB II Traps RFC 1215 MIB II RFC 1213 Bridge MIB RFC 1493 Bridge extensions RFC 2674 RMON MIB II RFC 2021 Remote Monitoring MIB RFC 1757 RS232 RFC 1659 Interfaces RFC 2233 MAU MIB RFC 2239 Ether like MIB RFC 2665 MAU MIB RFC 2668 Terminal Emulation Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 ARP RFC 826 TFTP RFC 783 DHCP RFC 2131 RFC 2132 RFC 1534 BOOTP RFC 951 RFC 1497 Link aggregation IEEE 802 3ad Network Login IEEE 803 1x RADIUS RFC 2618 2620 Supported on a Switch 4400 and an upgraded Switch 4400 SE Switch 4400 PWR 24 port 79 Switch 4400 PWR 24 port Physical Dimensions Height 44 mm 1 7 in x Width 440 mm 17 3 in x Depth 295 mm 11 4 in Weight 4 4 kg 9 7 lbs Environmental Requirements Operating Temperature Storage Temperature Operating Humidity 0 to 40 C 32 to 104 F 20 to 70 C 4 to 158 F 10 95 relative humidity non condensing Standards 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 Age
27. Bidirectional Data C 6 Receive Data Bidirectional Data B 7 Not assigned Bidirectional Data D 8 Not assigned Bidirectional Data D Table 11 Pin assignments RJ 45 Pin Assignments Function 75 Pin Number Signal Ports configured as MDIX 1 Receive Data 2 Receive Data 3 Transmit Data 4 Not assigned 5 Not assigned 6 Transmit Data 7 Not assigned 8 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 76 APPENDIX B PIN OUTS C TECHNICAL SPECIFICATIONS Switch 4400 24 port and Switch 4400 SE Physical Dimensions Height 44 mm 1 7 in x Width 440 mm 17 3 in x Depth 274 mm 10 8 in Weight 2 8 kg 6 2 Ibs Environmental Requirements Operating Temperature Storage Temperature Operating Humidity 0 to 40 C 32 to 104 F 40 to 70 C 40 to 158 F 10 95 relative humidity non condensing Standards 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 UL 1950 EN60950 CSA 22 2 No 950 IEC 60950 EMC Emissions CISPRR 22 Class A EN55022 Class A FCC Part 15 Subpart B Class A ICES 003 Class A AS NZS 3548 Class A EN61000 3 2 EN61000 3 3 Immunity EN 55024 Heat Dissipation 80 watts maximum 275
28. D RxD 2 a 2 TxD always required Ground 5 7 Ground RTS 7 eo 4 RTS CTS 8 eq 20 DTR DSR 6 5 CTS required for handshake DCD 1 eq 6 DSR DTR 4 e LI 8 DCD PC AT Serial Cable 9 pin to 9 pin Switch 4400 Series PC AT Serial Port Cable connector 9 pin female Cable connector 9 pin female Screen Shell Shell Screen ony reauired if screen DTR 4 e Lee 1 DCD Required for handshake TxD 3 o 2 RxD always required RxD 2 vllt TxD CTS 8 eq o 4 DTR required for handshake Ground 5 5 Ground always required DSR 6 e 6 DSR RTS 7 O l7 RTS required for handshake DCD 1 eq 8 CTS 74 APPENDIX B PIN OUTS Modem Cable 9 pin to RS 232 25 pin Switch 4400 Series RS 232 Modem Port Cable connector 9 pin female Cable connector 25 pin male Screen Shell e e 1 Screen TxD 3 e 2 TxD RxD 2 o e 3 RxD RTS 7 e 4 RTS CTS 8 CO e 5 CTS DSR 6 e e 6 DSR Ground 5 e 7 Ground DCD 1 e 8 DCD DTR 4 20 DTR RJ 45 Pin Pin assignments are identical for 10BASE TX and 100BASE T RJ 45 Assignments connectors Table 10 Pin assignments Pin Number Signal Function Ports configured as MDI 1 Transmit Data Bidirectional Data A 2 Transmit Data Bidirectional Data A 3 Receive Data Bidirectional Data B 4 Not assigned Bidirectional Data C 5 Not assigned
29. DF format on the CD ROM that accompanies the Switch If more than one fan has failed in the Switch a warning message will be generated by RMON Email Notification RMON Trap and also in the following ways a Command Line Interface An indication of a general hardware failure is provided through the Top level menu displayed when logging on to the CLI For more detailed information about the failure select the system summary command a Web interface An indication of fan failure is provided through the Device Summary table for the specific unit In addition all Summary tables turn red to indicate the fan failure If a fan failure warning message is generated Power off the unit 2 Check that the air vents are not obstructed 3 Power cycle the unit To do this remove and reconnect the AC mains supply If the unit has no AC main supply remove and reconnect the DC RPS supply If another fan failure warning message is generated via the Command Line Interface or the Web interface return the unit Solving Hardware Problems 61 Unit fails no SNMP fan failure message is received Power cycle the unit To do this remove and reconnect the AC mains supply If the unit has no AC mains supply remove and reconnect the DC RPS supply Check the command line interface system summary command to determine whether a thermal shutdown has occurred If no return the unit If yes check that m The air vents are not obstructed m The
30. EN 3com SuperStack 3 Switch 4400 Series Getting Started Guide Switch 4400 3C 17203 Switch 4400 3C 17204 Switch 4400 PWR 3C17205 Switch 4400 SE 3C 17206 Switch 4400 FX 3C17210 http www 3com com Part No DUA1720 3AAA07 Published March 2004 3Com Corporation 350 Campus Drive Marlborough MA 01752 3064 Copyright 2004 3Com Corporation All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without written permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty term or condition of any kind either implied or expressed including but not limited to the implied warranties terms or conditions of merchantability satisfactory quality and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory fil
31. Management Protocol SNMP can manage a Switch if m The correct Management Information Bases MIBs are installed on the management workstation m 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 Pre requisites gt Default Users and Passwords 55 automatically loads the correct MIBs and necessary files onto your workstation m 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 community command refer to the command line interface section of the SuperStack 3 Switch Management Interface Reference Guide for more information Default Users and Passwords AN gt Changing Default 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 T
32. PDF Implementation Guide is stored in the Docs implementation directory of the CD ROM 3Com recommends that you copy the Docs reference directory asa whole to maintain the structure of the files Documentation Comments Your suggestions are very important to us They will help make our documentation more useful to you Please e mail comments about this document to 3Com at pddtechpubs_comments 3com com gt Product Registration 11 Please include the following information when commenting m Document title m Document part number on the title page a Page number if appropriate Example Part Number DUA1720 3AAA07 SuperStack 3 Switch 4400 Series Getting Started Guide Page 21 Please note that we can only respond to comments and questions about 3Com product documentation at this e mail address Questions related to technical support or sales should be directed in the first instance to your network supplier Product Registration You can now register your SuperStack 3 Switch on the 3Com web site to receive up to date information on your product http www 3com com register 12 ABOUT THIS GUIDE INTRODUCING THE SUPERSTACK 3 SWITCH 4400 This chapter contains introductory information about the Switch 4400 and how it can be used in your network It covers summaries of hardware and software features and also the following topics a About the Switch 4400 a Switch 4400 Front View Detail m Switch 4400 Re
33. Register Your Product to Gain Service Benefits To take advantage of warranty and other service benefits you must first 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 Purchase Value Added Services To enhance response times or extend warranty benefits contact 3Com or your authorized 3Com reseller Value added services 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 Extended Warranty and Professional Services is available at http www 3com com Contact your authorized 3Com reseller or 3Com for additional product and support information Troubleshoot Online You will find support tools posted on the 3Com web site at http www 3com com 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 b
34. a Low Voltage conditions according to IEC 60950 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 IT supplies 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 Imp dance la terre WARNING U K only If connecting a modem to the console port of the Switch 4400 only use a modem which is suitable for connection to the telecommunications system WARNING RJ 45 Ports These are shielded RJ 45 data sockets They cannot be used as standard traditional telephone sockets or to connect the unit to a traditional PBX or public telephone network Only connect RJ 45 data connectors network telephony systems or network telephones to these sockets Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets WARNING Fiber Optic ports Optical Safety Class 1 LED Product Never look at the transmit LED through a magnifying device while it is powered on Never look directly at the fiber TX port and fiber cable ends when they are powered on 68 APPENDIX A SAFETY INFORMATION gt D WARNING The 4400 PWR 3C17205 supports Power over Ethernet on all front ports These ports should only be u
35. air To obtain telephone support as part of your warranty and other service benefits you must first register your product at http eSupport 3com com When you contact 3Com for assistance please have the following information ready a Product model name part number and serial number a A list of system hardware and software including revision level m Diagnostic error messages a Details about recent configuration changes if applicable Telephone Technical Support and Repair 85 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 sender s 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 Telephone numbers are correct at the time of publication Find a current directory of support telephone numbers posted on the 3Com web site at http csoweb4 3com com contactus Telephone Number Country Telephone Number Country Asia Pacific Rim Telephone Technical Support and Repair Australia 1 800 678 515 Philippines Hong Kong 800 933 486 India 61 2 9424 5179 or PR of China 000800 650 1111 Indonesia 001 803 61009 Japan 00531 616 439 or Singapore 03 5977 7991 S Korea Malaysia 1800 801 77
36. ambient temperatures and environmental conditions meet those specified in Appendix C Power cycle the unit If a further thermal shutdown occurs and all environmental conditions are satisfactory return the unit to 3Com A device is connected to a Switch 4400 PWR but power is not being supplied If power is not being supplied to a device connected to a Switch 4400 PWR you should do the following checks m Check that the device is compliant with the 802 3af standard ref 18 The 4400 PWR will only supply power through the front panel ports to 802 3af compliant devices m Check that the power budget for the Switch has not been exceeded If the power budget has been exceeded then by default the powered device connected to the Power over Ethernet port with the lowest priority port will lose power However if all the devices connected to the Switch have equal priority levels then the port with the highest number will lose power By default the Switch will allow a device to receive power as long as the Power over Ethernet power supply has 18 watts spare in its power budget If this much power is not available the device will not be powered unless it has a higher priority than existing powered ports and a Power over Ethernet fault will be reported for that port If enough power subsequently becomes available the port will be powered m Check that the port has not had a power limit imposed upon it 62 CHAPTER 4 PROBLEM SOLVING
37. ar View Detail a Default Settings 14 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 About the Switch 4400 Summary of Hardware Features The Switch 4400 is a stackable 10 100 Mbps Ethernet switch and provides high performance workgroups with a backbone to server connection The Switch 4400 allows Cascade Gigabit Ethernet or Fast Ethernet Fiber connections when expansion modules are installed in the expansion slots on the rear of the unit You can also add the Switch 4400 to any SuperStack system as your network grows The Switch 4400 PWR 3C 17205 supports Power over Ethernet on all front panel ports If you plug in a compatible IEEE 802 3af compliant device it will be automatically detected and power supplied to it Power over Ethernet is enabled on each port by default The Switch 4400 FX 3C 17210 has 24 100BASE FX MT RJ ports These allow easy connection of 100 Mbps fiber optic links Table 3 summarizes the hardware features that are supported by the Switch 4400 Table 3 Hardware features Feature Switch 4400 Addresses Up to 8000 supported a Up to 64 permanent entries Auto negotiation Supported on all ports Auto MDI MDI X not 3C 17210 Forwarding Modes Store and Forward Duplex Modes Half and full duplex on all front panel ports Flow Control In full duplex operation all ports are supported Smart Auto sensing Supported on all ports Traffic Prioritization Supported using the IEEE Std 802 ID 1998 Editio
38. are useful for small networks which are not connected to other networks or for initial configuration However as soon as a DHCP or BootP server is detected the Switch will configure itself with the IP address allocated by that server When using automatic IP configuration it is important that the IP address of the Switch is static otherwise you will not know what the IP address is and it will be difficult to manage Most DHCP and BootP servers allow static IP addresses to be configured so that you know what IP address will be allocated to the Switch Refer to the documentation that accompanies your DHCP BootP server For a detailed description of how automatic IP configuration operates please refer to the Implementation Guide 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 a 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 46 Once your Switch s initial set up is complete you can set up your chosen management me
39. cludes running a Power On Self Test Yellow The Switch has failed its Power On Self Test or A port has failed and has been automatically disabled You can verify this by checking that the Port Status LED is quickly flashing Yellow If a port fails the Switch passes its Power On Self Test and continues to operate normally Off The Switch is not receiving power or there is a fault with the Power Supply Unit Port LEDs Packet Green Full duplex packets are being transmitted received on the port Yellow Half duplex packets are being transmitted received on the port Off No packets are being transmitted received on the port Status Green A high speed 100 Mbps link is present and the port is enabled Green flashing A high speed 100 Mbps link is present but the port is disabled Yellow A low speed 10 Mbps link is present and the port is enabled not 4400 FX Yellow flashing A low speed 10 Mbps link is present but the port is disabled not 4400 FX Yellow flashing The port has failed and has been automatically disabled The fast Switch passes its Power On Self Test and continues to operate normally even if one or more ports are disabled Off No link is present 18 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 LED Color Indicates Port LEDs Power over Ethernet mode 3C17205 only Packet Green Power is being delivered to the port Green flashing Exceeded port power limit overCurrent MIB state or unable to
40. 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 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 The switch automatically generates a host key pair when it is powered up for the first time or after any reset to factory defaults Host key generation may take a while during which time SSH connections to the switch will be refused Install an SSH client application on the workstation you want to use to access the switch 3Com recommends the following SSH clients PUTTY OpenSSH and SSH Communications Security Corp Secure Shell Open an SSH session and access the switch using the switch s IP address and port number The first time you connect to the switch the client will ask you to confirm that the host key is correct for the device The switch and the SSH client will authenticate each other and a secure connection will be established Enter your usual username and password to access the CLI commands For increased security please change the default password when using SSH for the first time gt Setting Up Web Interface Management 53 For further informat
41. e all Switch 4400 units 24 port and 48 port in a stack to the latest software agent 3Com recommends that you initialize a Switch 4400 Switch 4400 SE Switch 4400 PWR or Switch 4400 FX unit that has previously been used elsewhere in your network before you add it to an existing stack If you do not initialize the unit problems may be caused by conflicting Switch configurations When the Switch 4400s are stacked together they are assigned a unit number from bottom to top for management purposes When further Switches are added to the stack they can be positioned at the bottom of the stack or at the top Either way the Switch management software will re order the Switch unit numbers into a logical order again from bottom to top 30 CHAPTER 2 INSTALLING THE SWITCH The Power up Sequence Powering up the Switch 4400 Checking for Correct Operation of LEDs Connecting a Redundant Power System The following sections describe how to get your Switch 4400 powered up and ready for operation Use the following sequence of steps to power up the Switch Plug the power cord into the power socket at the rear of the Switch 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 During the Power On Self Test all ports on the Switch are disabled and the LEDs light in a set sequence When the POST has completed check
42. e named LICENSE TXT or LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com s standard commercial license for the Software Technical data is provided with limited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com the 3Com logo and SuperStack are registered trademarks of 3Com Corporation ntel and Pentium are registered trademarks of Intel Corporation Microsoft MS DOS Windows and Windows NT are registered trademarks of Microsoft Corporation Novell and NetWare are registered trademarks of Novell
43. ely over the network see Figure 17 Figure 16 CLI management via the console port Standard Null Modem Cable Console Port Connection Workstation with terminal emulation software installed Switch Figure 17 CLI management over the network Connect over Network T C via Telnet Switch Workstation Refer to Setting Up Command Line Interface Management on page 50 50 CHAPTER 3 SETTING UP FOR MANAGEMENT Command Line Interface Management using SSH Web Interface Management SNMP Management The Switch 4400 supports Secure Shell version 2 SSHv2 allowing secure access to the Command Line Interface of the Switch If you use SSH to administer your Switch and the network traffic is intercepted no passwords or configuration information will be visible in the data To securely adminster the Switch using the Command Line Interface you need a third party SSH client Each Switch has an internal set of web pages that allow you to manage the Switch using a Web browser remotely over an IP network see Figure 18 Figure 18 Web interface management over the network Workstation Connect over Network via web browser Switch Refer to Setting Up Web Interface Management on page 53 You can manage a Switch using any network management workstation running the Simple Network Management Protocol SNMP as shown in Figure 19 For exam
44. ent 49 console port 19 conventions notice icons About This Guide 8 text About This Guide 8 cross over configuration 32 D default settings 20 users 55 documentation related 9 E Ethernet address of the Switch 26 INDEX 87 F factory defaults 20 H hardware features 14 I installing the Switch 23 prerequisites 24 IP addressing registered 62 IP configuration 37 L LEDs 17 logging in as a default user 55 M MAC address of the Switch 26 management methods 49 preparing for 38 setting up 35 36 manual setup console port 42 front panel port 39 MDI configuration 32 MDIX configuration 32 P passwords of default users 55 pin assignments modem cable 74 null modem cable 73 RJ45 74 serial cable 73 pin outs 73 ports 16 console 19 power over ethernet using 31 power socket 19 powering up a Switch 4400 30 problem solving 57 communication problems 62 hardware problems 59 88 INDEX IP addressing 59 LEDs 58 product name 26 R rack mounting a Switch 4400 25 Redundant Power System See RPS related documentation 9 RPS 19 connecting 30 socket 19 S safety information English 66 French 68 German 70 serial number of the Switch 26 serial port See console port Simple Network Management Protocol See SNMP SNMP 54 SNMP management 50 setting up 54 socket power 19 RPS 19 specifications system 77 SSH 52 straight through configuration 32 Switch automat
45. ers in the same cable Unlike many fiber optic systems only one MT RJ cable is needed to connect two MT RJ ports together To connect a front panel port to another 100BASE FX MT RJ multi mode port or to a patch panel a single MT RJ multi mode pinless jumper cable is required Since standard MT RJ cables are cross over cables no 34 CHAPTER 2 INSTALLING THE SWITCH IN Auto MDIX sensing is required The maximum cable length is 2 kilometers 1 24 miles CAUTION Do not connect pinned MT RJ connectors into any porton the Switch 4400 FX as this may damage the unit The ports have locator pins fitted and are designed for standard pinless connectors To connect a front panel port to a 100BASE FX single mode port or to a port that does not have an MT RJ connector an adaptor will be required It is not possible to connect a front panel port to a 1000BASE FX port SETTING UP FOR MANAGEMENT Your Switch can operate in its default state that is you can install it and it will work straight away plug and play However to make full use of the features offered by the Switch and to change and monitor the way it works you have to access the management software that resides on the Switch This is known as managing the Switch Managing the Switch can help you to improve the efficiency of the Switch and therefore the overall performance of your network This chapter explains the initial set up of the Switch and the different methods of
46. face 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 At the login and password prompts enter admin as 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 13 Manually Configuring IP Information 45 Figure 13 Example top level command line interface menu Menu options 3Com SuperStack 3 Switch 4Xxx bridge Administer bridge wide parameters feature Administer system features gettingStarted Basic device configuration logout Logout of the Command Line Interface physicallnterface Administer physical interfaces protocol Administer protocols security Administer security system Administer system level functions traffichanagement Administer traffic management Type for help Select menu option At the Select menu option prompt you can either a enter the protocol ip basicConfig command At the Enter configuration method prompt enter manual The screen prompts you to enter IP information or a enter the gettingStarted command At the Enter configuration method prompt enter manual The screen prompts you to enter IP information Enter the IP address subnet mask and gateway IP address for t
47. he Switch The screen displays a summary of the information entered If using the gettingStarted command you will then be prompted to enter system information change passwords and then given the option to carry out advanced configuration The protocol ip basicConfig command will prompt you for the management VLAN ID If the unit is new there is only one VLAN VLAN 1 to choose from 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 49 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 46 CHAPTER 3 SETTING UP FOR MANAGEMENT Viewing Automatically Configured IP Information Using 3Com Network Supervisor 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 a Using 3Com Network Supervisor This application will auto discover the Switch and display the automatically allocated IP information assigned to the Switch m 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 i
48. hese 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 Default Name 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 manager the user can access and change the operational parameters but not special security features admin no 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 You can change the default passwords using either a The gettingStarted command on the CLI or 56 CHAPTER 3 SETTING UP FOR MANAGEMENT a The security device user modify command on the CLI or a The Security gt Device gt User gt Modify operation on the web interface i gt For more information about default users and passwords refer to the Superstack 3 Switch Management Interface Reference Guide on the Switch CD ROM PROBLEM SOLVING This chapter helps you to diagnose and solve problems you may have with the operation of your Switch There is also an explanation of IP addressing The topics covered are Solving Problems Indicated by LEDs Solving Hardware Problems Solving Communica
49. ic setup 46 Switch 4400 3C number 26 console port 19 dimensions 77 Ethernet address 26 features 14 installation 23 24 MAC address 26 power socket 19 powering up 30 product name 26 rack mounting 25 RPS socket 19 serial number 26 size 77 stacking 27 unit information label weight 77 system specifications 77 26 T troubleshooting 57 U unit information label 26 W Web browsers choosing 53 web interface choosing a browser 53 web interface management 50 setting up 53 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
50. 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 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 gt 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 At the login and password prompts enter admin as 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 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 13 on page 45 52 CHAPTER 3 SETTING UP FOR MANAGEMENT Setting Up Command Line Interface Management using SSH This section describes how you can set up Command Line Interface management using SSH over a network To manage a Switch using the command line interface over a network using SSH Ensure you have already set up the Switch with IP information as described in Setting Up Overview on page 36 Check that you have the IP protocol
51. ion on generating a host key on your switch and transferring keys to the Switch using TFTP server please refer to Chapter 11 of the SuperStack 3 Switch Implementation Guide Setting Up Web Interface Management Pre requisites This section describes how you can set up web interface management over the network m Ensure you have already set up the Switch with IP information as described in Setting Up Overview on page 36 a 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 WindowsNT Windows Solaris Windows 95 Windows 98 4 2000 Windows XP 2 6 Netscape 4 76 S x x x X V4 Netscape 6 2 x S V4 J J x Netscape 7 0 x J S V4 J xX Internet Explorer 5 5 JY V4 TA JY V4 x Internet Explorer 6 0 x V4 JY V4 JY x 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 To enable style sheets in Netscape Navigator 4 76 on Solaris 2 6 open Netscape Navigator and select Edit gt Preferences gt Fonts Select the Use document specified fonts including Dynamic Fonts radi
52. le with RJ 45 connectors a A suitable Web browser refer to Choosing a Browser on page 53 m You need to have the following so that you can manually set up the Switch with IP information IP address subnet mask default gateway management VLAN ID normally set to the default value 1 40 CHAPTER 3 SETTING UP FOR MANAGEMENT Connecting the Workstation to the Switch Connect the workstation to a front panel port using an Ethernet cable as shown in Figure 10 Figure 10 Connecting a workstation to the Switch via a front panel port Ethernet Cable Switch Workstation with a Network Interface Card installed d A ip F Port Connection 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 m P address 169 254 100 99 m 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 inf
53. lefonsteckdosen noch f r die Verbindung der Einheit mit einem traditionellem privatem oder ffentlichem Telefonnetzwerk gebraucht werden Nur RJ 45 Datenansclu e Telefonnetzsysteme or Netztelefone an diese Steckdosen anschlie en Entweder gesch tzte oder ungesch tzte Buchsen d rfen an diese Datensteckdosen angeschlossen werden 72 APPENDIX A SAFETY INFORMATION f VORSICHT Faseroptikanschl sse Optische Sicherheit LED Ger t der Klasse 1 Niemals mit einem Vergr erungsger t ein bertragungs LED betrachten w hrend dieses eingeschaltet ist Niemals direkt auf den Faser TX Anschlu und auf die Faserkabelenden schauen w hrend diese eingeschaltet sind VORSICHT Das 4400 PWR 3C17205 unterst tzt die Stromversorgung per Ethernet an allen vorderen Ports Diese Ports d rfen nur f r die Ethernet Verkabelung im gleichen Geb ude verwendet werden VORSICHT Ist kein Erweiterungsmodul installiert berpr fen Sie bitte den Sitz der Stanzplatte indem Sie alle Schrauben mit einem geeigneten Werkzeug anziehen PIN OUTS Null Modem Cable 9 pin to RS 232 25 pin Switch 4400 Series PC Terminal Cable connector 9 pin female Cable connector 25 pin male female Screen Shell j 1 Screen only required if screen TxD 3 e 3 Rx
54. line up with the recesses of the lower unit Stacking Units Switch 4400 units can be stacked together and then treated as a single manageable unit with one IP address Any combination of 24 port and 48 port units is allowed in a single stack The SuperStack 3 Switch 4400 SE can only be stacked with non SE D gt Switches if it has been upgraded using the Switch 4400 SE Enhanced Software Upgrade 3C17207 An upgraded Switch 4400 SE cannot be stacked with a normal Switch 4400 SE How To Stack Units To stack two Switch 4400 units you will need to order the SuperStack 3 Switch Cascade Stacking Kit 3C17227 The kit consists of two Cascade Modules and a Cascade Cable Both Switches must have an unused expansion slot to allow a Cascade Module to be fitted Figure 7 Stacking two Switch 4400 units NY a S A KC 4 a N u 2 fam Ge _ a a To stack more than two Switch units you will need to order one SuperStack 3 Cascade Extender Kit 3C 17228 for each additional unit This Kit consists of one Cascade Module one Cascade Cable and one 28 CHAPTER 2 INSTALLING THE SWITCH Rules For Stacking Units Cascade Extender Unit The Cascade Module is installed into the expansion slot at the rear of the Switch and the Cascade Extender Unit plugs into the Cascade Module Figure 8 Stacking more than two Switch 4400 units switch 3 gt E gt 77 Switch 2 a Swi
55. n 4 queues per port Power over Ethernet Supported on all front panel ports 3C 17205 only Ethernet and Fast Ethernet Auto negotiating 10BASE T 100BASE TX ports or Ports 100BASE FX ports 3C 17210 RPS Support Connects to SuperStack 3 Advanced Redundant Power System ARPS 3C 1607 1B Mounting 19 inch rack or stand alone mounting Stacking All Switch units in the stack can be managed as a single entity with one IP address Switch 4400 Front View Detail 15 Switch 4400 Figure 1 Switch 4400 FX front view Front View Detail Port LEDs Packet and Status Power Self Test LED Bee sii bl er ZA Ak UHC uk uc nu a An Mk nr uv uv nu A And Ak nh CA a HH ap Unit LEDs 100BASE FX MT RJ Ports Module LEDs Packet and Status Figure 2 Switch 4400 24 port Switch 4400 SE front view Port LEDs Packet and Status Power Self Test LED a essen Fue Rein ne Puedes pe i a Te san Or
56. n prompt If the login prompt does not begin immediately press Return a few times until it starts At the login and password prompts enter admin as 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 11 42 CHAPTER 3 SETTING UP FOR MANAGEMENT gt Connecting to the Console Port Figure 11 Example top level command line interface menu Menu options 3Com SuperStack 3 Switch 4xxx bridge Administer bridge wide parameters feature Administer system features gettingStarted Basic device configuration logout Logout of the Command Line Interface physicallnterface Administer physical interfaces protocol Administer protocols security Administer security system Administer system level functions traffichanagement Administer traffic management Type for help Select menu option Jj At the Select menu option prompt you can either a enter the protocol ip basicConfig command At the Enter configuration method prompt enter manual The screen prompts you to enter IP information or a enter the gettingStarted command At the Enter configuration method prompt enter manual The screen prompts you to enter IP information Enter the IP address subnet mask and gateway IP address for the Switch The screen displays a summary of the information ente
57. ncy Certifications UL60950 EN60950 CSA 22 2 No 60950 IEC 60950 EMC Emissions CISPRR 22 Class A EN55022 Class A FCC Part 15 Subpart B Class A ICES 003 Class A AS NZS 3548 Class A EN61000 3 2 EN61000 3 3 Immunity EN 55024 Heat Dissipation 170 watts maximum 580 BTU hour maximum Power Supply AC Line Frequency 50 60 Hz Input Voltage Options 100 240 VAC Current Rating 2 5 A amps maximum Standards Supported SNMP Terminal Emulation SNMP protocol RFC 1157 MIB II RFC 1213 Bridge MIB RFC 1493 RMON MIB II RFC 2021 Remote Monitoring MIB RFC 1757 MAU MIB RFC 2239 MAU MIB RFC 2668 MIB II Traps RFC 1215 RS232 RFC 1659 Interfaces RFC 2233 Ether like MIB RFC 2665 Bridge extensions RFC 2674 Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 ARP RFC 826 TFTP RFC 783 DHCP RFC 2131 RFC 2132 RFC 1534 BOOTP RFC 951 RFC 1497 Network Login IEEE 803 1x RADIUS RFC 2618 2620 Link aggregation IEEE 802 3ad 80 APPENDIX C TECHNICAL SPECIFICATIONS Switch 4400 48 port Physical Dimensions Height 44 mm 1 7 in x Width 440 mm 17 3 in x Depth 274 mm 10 8 in Weight 3 2 kg 7 1 lbs Environmental Requirements Operating Temperature Storage Temperature Operating Humidity 0 to 40 C 32 to 104 F 40 to 70 C 40 to 158 F 10 95 relative humidity non condensing
58. nsure compliance with safety standards WARNING Power Cord Set This must be approved for the country where it is used U S A and m The cord set must be UL approved and CSA certified Canada The minimum specification for the flexible cord is No 18 AWG Type SV or SJ 3 conductor m The cord set must have a rated current capacity of at least 10A a The attachment plug must be an earth grounding type with a NEMA 5 15P 15A 125V or NEMA 6 15P 15A 250V configuration United The supply plug must comply with BS1363 3 pin 13 amp Kingdom only and be fitted with a 5A fuse which complies with BS1362 The mains cord must be lt HAR gt or lt BASEC gt marked and be of type HO3VVF3GO 75 minimum Europe only The supply plug must comply with CEE 7 7 SCHUKO The mains cord must be lt HAR gt or lt BASEC gt marked and be of type HO3VVF3GO 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 67 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 Extr
59. nt about the Documentation The documentation for this product is printed on paper that comes from sustainable managed forests it is fully biodegradable and recyclable and is completely chlorine free The varnish is environmentally friendly and the inks are vegetable based with a low heavy metal content ENCRYPTION This product contains encryption and may require U S and or local government authorization prior to export or import to another country CONTENTS ABOUT THIS GUIDE Before You Start 7 Release Notes 7 About Your CD ROM 8 Conventions 8 Related Documentation 9 Accessing Online Documentation 10 Documentation Comments 10 Product Registration 11 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 About the Switch 4400 14 Summary of Hardware Features 14 Switch 4400 Front View Detail 15 10BASE T 100BASE TX Ports 16 100BASE FX Ports 16 LEDs 17 Switch 4400 Rear View Detail 19 Power Socket 19 Redundant Power System Socket 19 Console Port 19 Expansion Module Slots 19 Default Settings 20 INSTALLING THE SWITCH Package Contents 24 Choosing a Suitable Site 24 Rack mounting 25 Placing Units On Top of Each Other 27 Stacking Units 27 How To Stack Units 27 Rules For Stacking Units 28 The Power up Sequence 30 Powering up the Switch 4400 30 Checking for Correct Operation of LEDs 30 Connecting a Redundant Power System 30 Using Power over Ethernet 31 Choosing the Correct Cables Switch 4400 4400 SE and 440
60. nt panel ports Disabled on rear panel port Enabled Enabled Disabled All ports prioritize NBX VoIP traffic LAN and IP All ports set to best effort for all other traffic Disabled per port Disabled Default Settings 21 To make SSH Webcache redirection RADIUS including 802 1x Network Login Auto VLAN assignment and Traffic Prioritization available on the SuperStack 3 Switch 4400 SE upgrade the product to the Switch 4400 SE Enhanced Software Upgrade 3C1 7207 If you initialize a Switch unit by selecting System gt Control gt 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 m P Address m Subnet Mask Default Router 22 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 gt gt INSTALLING THE SWITCH This chapter contains the information you need to install and set up the Switch 4400 It covers the following topics m Package Contents a Choosing a Suitable Site m Rack mounting a Placing Units On Top of Each Other a Stacking Units a The Power up Sequence WARNING Safety Information Before installing or removing any components from the Switch 4400 or carrying out any maintenance procedures you must read the safety information provided in Appendix A of this guide AVERTISSEMENT Consignes de s curit Avant d installer ou d enlever tout composant du S
61. nterface CLI You can use the 3Com Network Supervisor application provided on the CD ROM that accompanies your Switch to discover the automatically allocated IP information 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 gt gt Connecting to the Console Port 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 Alternatively you can view the automatically configured IP information 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 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 m Documentation supplied with the terminal emulation software Viewing A
62. o button You should also set the font sizes as follows 54 CHAPTER 3 SETTING UP FOR MANAGEMENT Web Management Over the Network 1 a Variable Width Font Size 10 0 a Fixed Width Font Size 12 0 This ensures that the text spacing is correct Finally in the Advanced category ensure that Enable Java Script and Enable style sheets are checked To manage a Switch using the web interface over an IP network 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 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 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 http xxx xxx xxx xxx At the login and password prompts enter admin as your user name and press Return at the password prompt or the password of your choice if you have already modified the default passwords Click on the Device View button to display the web management options Setting Up SNMP Management Any network management application running the Simple Network
63. o negotiating 10BASE T 100BASE TX ports configured as Auto MDIX cross over These ports automatically provide the appropriate connection 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 The 4400 PWR will supply up to 15 4W of power through any of the 24 front panel ports in conformance to the 802 3af specification The Switch 4400 PWR incorporates a LED Mode Button on the front panel which when pressed changes the mode of the front panel port LEDs functionality between Switch and Power mode The Switch 4400 FX has 24 100BASE FX MT RJ ports These are 100 Mbps fiber optic ports that can use standard multi mode fiber optic cable of up to 2 kilometers 1 2 miles They use the standard MT RJ LEDs Switch 4400 Front View Detail 17 connector that allows both the transmit and the receive fibers to be connected in the same space as an RJ 45 port 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 58 Table 4 LED behavior LED Color Indicates 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 in
64. o the console panel port and use the port and use the Supervisor 3NS port and use the Web Interface or Command Line See page 46 Command Line KR Command Line Interface Interface Interface See page 39 See page 39 See page 46 4 How do you want to manage your Switch See page 49 Command Line Interface SNMP See page 54 Web Inter Connect via the console port See page 51 Connect over the network via Telnet See page 51 Connect over the network See page 54 AN IP Configuration Setting Up Overview 37 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 55 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 m you do not have a DHCP or BootP server on your network or m you want to remove the risk of
65. or a power budget issue If there is a fault then the Packet LED of the affected port will be yellow If a port exceeds its power limit then the Packet LED of the port will flash green If a port has a Power over Ethernet POST error then the Status LED of the affected port will flash yellow Solving Hardware Problems In the rare event of your Switch unit experiencing a hardware failure refer to the list of suggested solutions below An expansion module is installed and the unit will not power up Ensure that the expansion module is fully seated in the slot and the connectors are engaged so that the securing screws can be tightened A fan failure warning message is received Your Switch has a fan monitoring system that will generate fan failure warning messages Fan failure could potentially reduce the lifetime of the 60 CHAPTER 4 PROBLEM SOLVING Switch The monitoring system polls the fan status at periodic intervals while the unit is powered up If one fan has failed in the Switch a warning message will be generated in the following ways a RMON Email Notification If configured you will receive notification of the fan failure via email SMS Short Message Service or pager a RMON Trap If configured an RMON trap is generated and sent to the management workstation For further information about RMON refer to Chapter 7 Status Monitoring and Statistics in the Switch Implementation Guide supplied in P
66. 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 Rack mounting 25 a The air is as free from dust as possible a The unit is installed in a clean air conditioned environment a No more than eight Switch units are placed on top of one another if the units are free standing a The Switch is situated away from sources of conductive electrical dust for example laser printers m 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 Rack mounting The Switch 4400 is 1U high and will fit in most standard 19 inch racks 1 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 6 26 CHAPTER 2 INSTALLING THE SWITCH Figure 6 Fitting a bracket for
67. ormation You can do this using the Web interface or the command line interface CLI via telnet Using the Web Interface Power up the Switch This takes approximately one minute Open a suitable Web browser and enter 169 254 100 100 in the Location Address field This is the default IP address that is automatically assigned to an offline unit Manually Configuring IP Information 41 If there is no response wait for one minute then re enter the default IP address At the login and password prompts enter admin as 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 The Getting Started pages allow you to enter basic setup information for the Switch Select Manual and 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 49 Using Command Line Interface via Telnet To start a Telnet session to the unit click Start in Microsoft Windows 95 98 72 000 NT 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 Press Enter to open a logi
68. ple you can use the 3Com Network Supervisor software that is provided on the CD ROM that accompanies your Switch Figure 19 SNMP management over the network Connect over Network u using SNMP Switch SNMP Network Management Workstation Refer to Setting Up SNMP Management on page 54 Setting Up Command Line Interface Management This section describes how you can set up command line interface management using a local console port connection or over the network CLI Management via the Console Port CLI Management over the Network 1 1 Setting Up Command Line Interface Management 51 To manage a Switch using the command line interface via the local console port connection Ensure you have connected your workstation to the console port correctly as described in Connecting to the Console Port on page 42 Your Switch is now ready to continue being managed and or configured through the CLI via its console port To manage a Switch using the command line interface over a network using Telnet Ensure you have already set up the Switch with IP information as described in Setting Up Overview on page 36 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 Check you can communicate with the Switch by entering a ping command at the DOS prompt
69. port 79 Switch 4400 48 port 80 Switch 4400 FX 81 OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product to Gain Service Benefits 83 Purchase Value Added Services 83 Troubleshoot Online 83 Access Software Downloads 84 Contact Us 84 Telephone Technical Support and Repair 84 INDEX REGULATORY NOTICES ABOUT THIS GUIDE This guide provides all the information you need to install and use the following switches in their default state m SuperStack 3 Switch 4400 3C 17203 m SuperStack 3 Switch 4400 3C 17204 m SuperStack 3 Switch 4400 PWR 3C17205 m SuperStack 3 Switch 4400 SE 3C 17206 m SuperStack 3 Switch 4400 FX 3C17210 All procedures described in this guide apply to all models except where stated 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 Before You Start Release Notes gt This section contains information about the documents and CD ROM that accompany your Switch 4400 The Release Notes provide important information about the current software release including new features modifications and known problems You should read the Release Notes before installing the Switch in your network If the information in the Release Notes differ from the information in this guide follow the instructions in the Release Notes
70. r up Sequence 33 connection to an MDI port you need to use a standard straight through cable See Table 7 WARNING The 4400 PWR 3C17205 supports Power over Ethernet on all front ports These ports should only be used for Ethernet wiring within the same building The Rear Module ports of the Switch 4400 PWR can be used for ethernet wiring between buildings 3Com recommends that you use Category 5 twisted pair cable the maximum segment length for this type of cable is 100 m 328 ft Table 7 Cables required to connect the Switch 4400 to other devices if auto negotiation is disabled Cross over Cable Straight through Cable Switch to Switch MDIX to MDIX vd x Switch to Hub MDIX to MDIX A x Switch to PC NIC x MDIX to MDI 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 cable s 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 All of the ports on the front of the Switch 4400 FX are 100BASE FX MT RJ multi mode ports The MT RJ port is a small form factor fiber optic port with the transmit and receive fib
71. red If using the gettingStarted command you will then be prompted to enter system information change passwords and then given the option to carry out advanced configuration The protocol ip basicConfig command will prompt you for the management VLAN ID If the unit is new there is only one VLAN VLAN 1 to choose from 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 49 To set up your Switch manually you can alternatively make a connection 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 43 Pre requisites a 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 m Documentation supplied with the terminal emulation software a 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 amodem You can find pin out diagrams for both cables in Appendix B on page 73 m You need
72. sed for ethernet wiring within the same building WARNING When an Expansion Module is not installed ensure the blanking panel is fitted by tightening all screws with a suitable tool L information de S curit Importante Pie 2 AVERTISSEMENT L installation et la d pose de ce groupe doivent tre confi s un personnel qualifi AVERTISSEMENT Si vous entassez l unit Switch avec les unit s SuperStack 3 Hub l unit Switch 4400 doit tre install e en dessous des unit s Hub plus troites AVERTISSEMENT Vous devez mettre l appareil la terre la masse ce groupe AVERTISSEMENT Brancher l unit une source de courant mise la terre pour assurer la conformit aux normes de s curit AVERTISSEMENT Cordon lectrique il doit tre agr ans le pays d utilisation Etats Unis et m Le cordon doit avoir re u l homologation des UL et un Canada certificat de la CSA Le cordon souple doit respecter titre minimum les sp cifications suivantes calibre 18 AWG m type SV ou SJ m 3 conducteurs m Le cordon doit tre en mesure d acheminer un courant nominal d au moins 10 A La prise femelle de branchement doit tre du type mise la terre mise la masse et respecter la configuration NEMA 5 15P 15 A 125 V ou NEMA 6 15P 15 A 250 V Danemark La prise m le d alimentation doit respecter la section 107 2 D1 de la norme DK2 1a ou DK2 5a L information de S curit Importante 69
73. tch 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 10 ABOUT THIS GUIDE Accessing Online Documentation D m Release Notes These notes provide information about the current software release including new features modifications and known problems The Release Notes are supplied in hard copy with your Switch There are other publications you may find useful such as m Documentation accompanying the Advanced Redundant Power system m Documentation accompanying the Expansion Modules m Documentation accompanying 3Com Network Supervisor This is supplied on the CD ROM that accompanies the Switch To access the documentation on the CD ROM supplied with your Switch do the following Insert the CD ROM into your CD ROM drive If your PC has auto run enabled a splash screen will be displayed automatically 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 a The HTML Reference Guide is stored in the Docs reference directory on the CD ROM The documentation is accessed using the contents htm file m The
74. tch 1 For information on ordering the Cascade Kits contact your supplier For illustrations and information on how to install the Cascade Kits refer to the user documentation that accompanies these Kits This information is also provided in the user documentation that accompanies the Cascade Kits m The maximum number of Switch units in a stack is limited to 8 The stack may contain a combination of 24 and 48 port units m Only one Cascade Module can be installed per Switch If Cascade Modules are fitted to both expansion slots in a Switch then both Modules will be disabled a Cascade Modules are NOT hot swappable or hot insertable Ensure that the Switch is powered off before inserting or removing a Cascade Module Stacking Units 29 The Cascade Extender Unit is hot insertable This allows its host Switch unit to be removed and replaced without disturbing the rest of the stack Only 3Com Cascade Cables can be used to connect between Cascade Modules Cascade Extender Units Due to the length of the Cascade Cables you must insert all of the Cascade Modules into Expansion Module Slot 1 or all of the Cascade Modules into Expansion Module Slot 2 on the Switches It is not possible to stack a Switch 4400 Switch 4400 SE Switch 4400 PWR or Switch 4400 FX unit with SuperStack Il or other SuperStack 3 products using the Cascade Stacking Kit 3C17227 or Cascade Extender Kit 3C 17228 3Com strongly recommends that you upgrad
75. the IP address ever changing or m your DHCP or BootP server does not allow you to allocate static IP addresses Static IP addresses are necessary to ensure that the Switch is always allocated the same IP information 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 39 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 38 CHAPTER 3 SETTING UP FOR MANAGEMENT gt Preparing for Management gt 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
76. the Power 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 State Green The Switch is powered up and operating normally Yellow The Switch has failed its Power On Self Test Off The Switch is not receiving power If there is evidence of a problem see Solving Problems Indicated by LEDs on page 58 You can connect a SuperStack 3 Advanced Redundant Power System 3C16071B to the Switch This unit which is also known as an RPS is designed to maintain the power to your Switch if a power supply failure Occurs For normal redundancy the Switch 4400 Switch 4400 SE and Switch 4400 FX require one Type 2A Power Module 3C16074A For full redundancy the Switch 4400 Switch 4400 SE and Switch 4400 FX require two type 2A Power Modules combined using a Type 2 Y Cable The Switch 4400 PWR 3C 17205 requires one Type 3 Power Module 3C 16075 for normal redundancy and two Type 3 Power Modules for full redundancy AN AN Using Power over Ethernet The Power up Sequence 31 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 The Switch 4400 PWR can power any IEEE 802 3af compliant device through any of its front panel ports The Switch will
77. thernet is not supported on expansion modules on the Switch 4400 PWR 3C 17205 Contact your supplier for more information WARNING When an Expansion Module is not installed ensure the blanking plate is fitted by tightening all screws with a suitable tool 20 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 Default Settings Table 5 shows the default settings for the Switch 4400 Table 5 Default Settings Feature Switch 4400 Automatic IP Configuration Enabled Port Status Enabled Port Speed Duplex Mode Power over Ethernet Flow Control Broadcast Storm Control Virtual LANs VLANs Management VLAN Trust IP Link Aggregation Control Protocol LACP IP Multicast Filtering Rapid Spanning Tree Protocol Fast Start RMON Alarm Smart Auto Sensing Webcache Support Traffic Prioritization Port Security Configuration Save and Restore 10 100 Mbps ports are auto negotiated MT RJ ports 3C 17210 are fixed at 100 Mbps All fixed 10BASE T and 100BASE TX ports are auto negotiated 100BASE FX ports default to full duplex mode 100 FD and must be manually set to half duplex mode 100 HD if required Enabled 3C 17205 only Enabled in half duplex mode Auto negotiated in full duplex mode Enabled All ports belong to the untagged Default VLAN VLAN 1 with IEEE Std 802 1Q 1998 learning operational VLAN 1 Disabled Disabled per port gt es iltering enabled Enabled Enabled on fro
78. thod as described in Methods of Managing a Switch on page 49 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 39 Manually Configuring IP Information Connecting to a Front Panel Port gt You can manually configure the Switch IP information in the following ways m 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 m 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 To set up your Switch manually you can make a connection to a front 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 95 98 2000 Windows NT or Windows XP a A Network Interface Card NIC m A Category 5 twisted pair Ethernet cab
79. tion 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 58 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 a testing it in another device m 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 Either a The Switch unit has failed its Power On Self Test POST because of an internal problem The fault type will be indicated on the unit LEDs Contact your supplier for advice or a A port has failed and has been automatically disabled You can verify this by checking that the Port Status LED is quickly flashing Yellow If a port fails the Switch passes its Power On Self Test and continues to operate normally A Port Status LED is quickly flashing yellow The port has failed and has been automatically disabled The
80. utomatically Configured IP Information 47 A suitable cable a 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 amodem You can find pin out diagrams for both cables in Appendix B on page 73 m A Category 5 twisted pair Ethernet cable with RJ 45 connectors to connect your Switch to the network Connecting the Workstation to the Switch Connect the workstation to the console port using a standard null modem cable as shown in Figure 14 Figure 14 Connecting a workstation to the Switch via the console port Standard Null Modem Cable Console Port L Connection Workstation with terminal emulation software installed Switch 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 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 a 19 200 baud a 8 data bits no parity a 1 stop bit m no hardware flow control Refer to the documentation that accompanies the terminal emulation
81. uvent pas tre utilis s comme prises de telephone conventionnelles standard ni pour la connection de l unit un r seau t l phonique central priv ou public Raccorder seulement connecteurs de donn es RJ 45 syst mes de r seaux de t l phonie ou telephones de r seaux ces prises Il est possible de raccorder des c bles prot g s ou non prot g s avec des jacks prot g s ou non prot g s ces prises de donn es 70 APPENDIX A SAFETY INFORMATION gt DB AVERTISSEMENT Ports pour fibres optiques securite sur le plan optique Dispositif LED de Classe 1 Ne regardez jamais le voyant DEL d mission en utilisant un dispositif d agrandissement tant qu il est sous tension Ne regardez jamais directement le port TX Transmission fibres optiques et les embouts de c bles fibres optiques tant qu ils sont sous tension AVERTISSEMENT Le 4400 PWR 3C1 7205 prend en charge la mise sous tension par Ethernet au niveau de tous les ports frontaux Ces ports ne doivent tre utilis s que pour le c blage Ethernet au sein d un m me b timent AVERTISSEMENT Si le module d expansion nest pas install veillez bien installer la plaque d obturation et serrez toutes les vis l aide d un outil appropri Wichtige Sicherheitsinformationen SS gt gt gt VORSICHT Die Installation und der Ausbau des Ger ts darf nur durch Fachpersonal erfolgen VORSICHT Wenn die Switch 4400 Einheit in einer
82. v rT tt 0 acom WWW Wm Sieg eer 10BASE T 100BASE TX Module LEDs RJ 45 Ports Unit LEDs Packet and Status Figure 3 Switch 4400 PWR front view Port LED Packet a Status Power Self Test LED ee ee ree Ne ee ar ee eas an a gg gn d TTITILT 3com 317205 SuperStack 3 II ML Ia les LED Mode button 1OBASE T 100BASE TX Unit LEDs Module LEDs RJ 45 Ports Power Utilization LEDs Packet and Status 16 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH A400 Figure 4 Switch 4400 48 port front view P1O 28 39 4188 F Dem Gr P 25 S P 26 7 28 2 30 Ou x Module Packet LEDs Port Status LEDs Module Status LEDs 10BASE T 100BASE TX Unit LEDs Power Self RJ 45 Ports Test LED 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 4400 4400 SE and 4400 PWR have 24 or 48 100BASE TX Ports 100BASE FX Ports aut
83. witch 4400 ou d entamer une proc dure de maintenance lisez les informations relatives a la s curit gui se trouvent dans l Appendice A de ce guide VORSICHT Sicherheitsinformationen Bevor Sie Komponenten aus dem Switch 4400 entfernen oder dem Switch 4400 hinzufuegen oder Instandhaltungsarbeiten verrichten lesen Sie die Sicherheitsanweisungen die in Appendix A Anhang A in diesem Handbuch aufgefuehrt sind 24 CHAPTER 2 INSTALLING THE SWITCH Package Contents Switch unit CD ROM includes documentation related to your Switch Getting Started Guide this guide Management Quick Reference Guide Release Notes Unit Information Labels Warranty Information Power Cord 2 x Mounting brackets 4 x Screws 4 x Rubber feet Choosing a Suitable Site gt 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 a sources of electrical noise such as radios transmitters and broadband amplifiers a power lines and fluorescent lighting fixtures The Switch is accessible and cables can be connected easily Water
84. y 3Com support engineers 84 APPENDIX D OBTAINING SUPPORT FOR YOUR PRODUCT m Connection Assistant helps you install configure and troubleshoot 3Com desktop and server NICs wireless cards and Bluetooth devices This diagnostic software is located at http www 3com com prodforms software connection assistan t ca_thankyou html 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 site at http eSupport 3com com 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 OF under the Product Support heading at http www 3com com Software Upgrades are the software 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 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 You will find a current directory of support telephone numbers posted on the 3Com web site at http csoweb4 3com com contactus Telephone Technical Support and Rep

3Com 4400 (3C17203) Switch User Manual

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