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24

C

HAPTER

2: I

NSTALLING

THE

S

WITCH

WARNING:

If you are connecting the Switch 4950 to a Type 3 Power

Module, read the Safety Information section in the Type 3 Power Module
User Guide.

CAUTION:

The Switch can only use a SuperStack Advanced Redundant

Power System output.

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.

Choosing the Correct

10/100/1000BASE-T

Cables

The 12 10/100/1000BASE-T ports on the front of the Switch 4950 are
Auto-MDIX, that is they have a cross-over capability. These ports can
automatically detect whether to operate in MDI or MDIX mode. Therefore
you can make a connection to one of the ports with a straight-through
(MDI) or a cross-over cable (MDIX).

The Auto-MDIX feature only operates when auto-negotiation is enabled.

If auto-negotiation is disabled, all the Switch ports are configured as
MDIX (cross-over). If you want to make a connection to another MDIX
port, you need a

cross-over

cable. Many ports on workstations and

servers are configured as MDI (straight-through). If you want to make a
connection to an MDI port, you need to use a standard

straight-through

cable. See

Table 8

.

3Com recommends that you use at least Category 5 twisted pair cable —
the maximum segment length for this type of cable is 100 m (328 ft).

Table 8

Cables required to connect the Switch 4950 to other devices if

auto-negotiation is disabled

Cross-over Cable

Straight-through Cable

Switch to Switch
(MDIX to MDIX)

✓

✕

Switch to Hub
(MDIX to MDIX)

✓

✕

Switch to PC (NIC)
(MDIX to MDI)

✕

✓

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Содержание SuperStack 3 4950

Страница 1: ...http www 3com com Part No DUA1770 6AAA03 Published October 2001 SuperStack 3 Switch 4950 Getting Started Guide 3C17706 ...

Страница 2: ...on 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 and SuperStack are registered trademarks of 3Com Corporation The 3Com logo and CoreBuilder are trademarks of 3Com Cor...

Страница 3: ...atures 12 Summary of Software Features 13 Switch 4950 Front View Detail 13 10 100 1000BASE T Ports 14 1000BASE SX Ports 14 GBIC Ports 14 LEDs 15 Switch 4950 Rear View Detail 16 Unit Information Label 16 Power Socket 16 Redundant Power System Socket 16 Console Port 17 Expansion Module Slot 17 Default Settings 17 2 INSTALLING THE SWITCH Package Contents 20 Choosing a Suitable Site 20 Rack mounting 2...

Страница 4: ... Initial Switch Setup 31 Pre requisites 31 Connecting to the Console Port 32 Setting up IP Information via the Console Port 33 Methods of Managing a Switch 34 Command Line Interface Management 34 Web Interface Management 35 SNMP Management 35 Setting Up Command Line Interface Management 36 CLI Management via the Console Port 36 CLI Management over the Network 36 Setting Up Web Interface Management...

Страница 5: ...l Modem Cable 55 PC AT Serial Cable 55 Modem Cable 56 RJ 45 Pin Assignments 56 C TECHNICAL SPECIFICATIONS D TECHNICAL SUPPORT Online Technical Services 61 World Wide Web Site 61 3Com Knowledgebase Web Services 61 3Com FTP Site 62 Support from Your Network Supplier 62 Support from 3Com 62 Returning Products for Repair 64 INDEX REGULATORY NOTICES ...

Страница 6: ......

Страница 7: ...t Interface Reference Guide an online guide which gives you detailed information on how to use the web interface and command line interface to manage the Switch 3Com Network Supervisor a powerful network management tool for small to medium enterprise networks A number of other useful applications If the information in the release notes that are shipped with your product differ from the information...

Страница 8: ...mple To change your password use the following syntax system password password In this example you must supply a password for password Commands The word command means that you must enter the command exactly as shown and then press Return or Enter Commands appear in bold Example To display port information enter the following command bridge port detail The words enter and type When you see the word...

Страница 9: ...ion 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 There are other publications you may find useful Documentation accompanying the Advanced Redundant Power System Documentation accompanying the Expansion Modules Documentation accompanying 3Com Network Supervisor This is supplied on the ...

Страница 10: ...ds that you copy the Docs referenceguide directory as a whole to maintain the structure of the files Product Registration You can register your SuperStack 3 Switch on the 3Com Web site to receive up to date information on your product http support 3com com registration frontpg pl Documentation Comments Your suggestions are very important to us They will help make our documentation more useful to y...

Страница 11: ...ctory information about the SuperStack 3 Switch 4950 and how it can be used in your network It covers summaries of hardware and software features and also the following topics About the Switch 4950 Switch 4950 Front View Detail Switch 4950 Rear View Detail Default Settings ...

Страница 12: ...pported Up to 64 permanent entries Forwarding Modes Store and Forward Duplex Modes Half duplex only supported on 10 100 1000 Mbps ports in 10 100 Mbps mode All 1000 Mbps ports are full duplex only Flow Control Supported on all ports Smart auto sensing Supported on 10 100 1000BASE T ports only Traffic Prioritization Supported IEEE 802 1D incorporating 802 1P Four traffic queues per port Fast Ethern...

Страница 13: ... 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 Feature Switch 4950 Resilient Links Supported Aggregated Links Support for four groups of four ports per unit Broadcast Storm Control Supp...

Страница 14: ... negotiation enabled where the speed duplex and flow control modes are negotiated As the speed and duplex modes are fixed by the media type only the flow control is negotiated with the link partner Alternatively auto negotiation can be disabled and the flow control setting can be manually configured GBIC Ports The 6 GBIC ports support fiber Gigabit Ethernet short wave SX long wave LX and long haul...

Страница 15: ... disabled Off No link is present Module Status LEDs Green The Module is installed and supported The Link Status has been determined for a single port Module Yellow The Module is installed and supported The Module has multi ports or there is no Link for a single port Module Yellow flashing The Module is installed but not supported Note that the 4950 unit will continue to operate normally Off The Mo...

Страница 16: ...mation for fault reporting purposes Power Socket The Switch automatically adjusts its power setting to any supply voltage in the range 90 240 VAC Redundant Power System Socket To protect against internal power supply failure you can use this socket to connect a SuperStack 3 Advanced Redundant Power System RPS to the Switch If there is evidence of a problem see Connecting a Redundant Power System o...

Страница 17: ...ws with a suitable tool Default Settings Table 6 shows the default settings for the Switch 4950 If you initialize one of the Switch units it is returned to these defaults Table 6 Default Settings Feature Switch 4950 Port Status Enabled Port Speed Auto negotiated Duplex Mode Auto negotiated Flow Control Auto negotiated Broadcast Storm Control Enabled High threshold 3000 broadcast frames per second ...

Страница 18: ...18 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4950 ...

Страница 19: ...ny maintenance procedures you must read the safety information provided in Appendix A of this guide AVERTISSEMENT Consignes de sécurité Avant d installer ou d enlever tout composant du Switch 4950 ou d entamer une procédure de maintenance lisez les informations relatives à la sécurité qui se trouvent dans l Appendice A de ce guide VORSICHT Sicherheitsinformationen Bevor Sie Komponenten aus dem Swi...

Страница 20: ...tructed To ensure this product provides optimum performance high speed fans are used to provide ventilation These fans have a high audible output When deciding where to position the Switch ensure that Cabling is located away from sources of electrical noise such as radios transmitters and broadband amplifiers power lines and fluorescent lighting fixtures The Switch is accessible and cables can be ...

Страница 21: ...ck if it is mounted on runners a shelf or a tray to support the weight The rack mount kits alone are not sufficient to support the weight of the switch The rack mount kits must not be used to suspend the Switch from under a table or desk or attach it to a wall CAUTION Disconnect all cables from the Switch before continuing Remove all self adhesive pads from the underside of the Switch if they have...

Страница 22: ...ructed 6 Connect network cabling Placing Units On Top of Each Other If the Switch units are free standing up to four units can be placed one on top of the other If you are mixing a variety of SuperStack 3 Switch and Hub units the smaller units must be positioned at the top If you are placing Switch units one on top of the other you must use the self adhesive rubber pads supplied Apply the pads to ...

Страница 23: ... make sure that your Switch is operating correctly Table 7 shows possible colors for the LED Table 7 Power Self Test LED Colors If there is evidence of a problem see Solving Problems Indicated by LEDs on page 40 for a list of suggested solutions Connecting a Redundant Power System You can connect a SuperStack 3 Advanced Redundant Power System to the Switch This unit which is also known as an RPS i...

Страница 24: ...e a connection to one of the ports with a straight through MDI or a cross over cable MDIX The Auto MDIX feature only operates when auto negotiation is enabled If auto negotiation is disabled all the Switch ports are configured as MDIX cross over If you want to make a connection to another MDIX port you need a cross over cable Many ports on workstations and servers are configured as MDI straight th...

Страница 25: ...C or ST please contact your network supplier for a suitable patch cable GBIC Operation The following sections describes how to insert a GBIC transceiver into a GBIC port GBIC transceivers are hot insertable and hot swappable You can remove them from and insert then into any GBIC port without having to power down the Switch Approved GBIC Transceivers The 3Com approved GBIC transceivers are 3CGBIC91...

Страница 26: ...nnector Type 4 GBIC with internal EEPROM fitted If the GBIC transceiver is faulty it will not operate within the Switch See Solving Hardware Problems on page 41 Do not use non 3Com GBICs If the GBIC transceiver is invalid it will not be recognised by the Switch Use the following sequence of steps to activate the GBIC ports 1 To insert one of the transceivers into a GBIC expansion port on the Switc...

Страница 27: ...h a male duplex SC connector on the network cable into the duplex SC connector on the transceiver 4 Connect the other end of the cable to a device fitted with an appropriate Gigabit Ethernet connection 5 Check the LEDs on the front of the Switch to ensure that it is operating correctly Refer to LEDs on page 15 for more information ...

Страница 28: ...28 CHAPTER 2 INSTALLING THE SWITCH ...

Страница 29: ...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 different methods of accessing the management software to manage a Switch It covers the following topics Logging in as a Default User Introduction to Setting Up Initial Switch Setup Methods of Managing a...

Страница 30: ...if you do not intend to actively manage your Switch Changing Default Passwords You can change the default passwords using either The security device user modify command on the CLI or The Security Device User Modify operation on the web interface For more information about default users and passwords refer to the Superstack 3 Switch Management Interface Reference Guide on the Switch CD ROM User Nam...

Страница 31: ...eb interface operations and command line interface commands refer to the SuperStack 3 Switch Management Interface Reference Guide on the CD ROM that is supplied with the Switch For information about solving problems when managing the Switch refer to the Problem Solving section in the SuperStack 3 Switch Management Interface Reference Guide on the CD ROM that is supplied with the Switch Initial Swi...

Страница 32: ... rather than a remote one via a modem 1 Connect the workstation to the console port using a standard null modem cable as shown in Figure 5 Figure 5 Connecting a workstation to the Switch via the console port To connect the cable a Attach the female connector on the cable to the male connector on the console port of the Switch b Tighten the retaining screws on the cable to prevent it from being loo...

Страница 33: ...s 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 6 Figure 6 Example top level command line interface menu 3 At the Select menu option prompt enter the protocol ip basicConfig command The screen prompts you to enter IP information 4 Enter the IP address subnet mask and default gateway for ...

Страница 34: ...e management Web interface management SNMP management Command Line Interface 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 7 or remotely over the network see Figure 8 Figure 7 CLI management via the console port Figure 8 CLI management over the network Refer to Setting Up Comma...

Страница 35: ...er the network Refer to Setting Up Web Interface Management on page 37 SNMP Management You can manage a Switch using any network management workstation running the Simple Network Management Protocol SNMP as shown in Figure 10 For example you can use the 3Com Network Supervisor software that is provided on the CD ROM that accompanies your Switch Figure 10 SNMP management over the network Refer to S...

Страница 36: ...on page 31 2 Check that you have the IP protocol correctly installed on your management workstation You can check this by trying to browse the World Wide Web If you can browse the IP protocol is installed 3 Check you can communicate with the Switch by entering a ping command at the DOS prompt in the following format c ping xxx xxx xxx xxx where xxx xxx xxx xxx is the IP address of the Switch If yo...

Страница 37: ...vaScript and Cascading Style Sheets must be enabled on your browser These features are enabled on a browser by default You will only need to enable them if you have changed your browser settings Web Management Over the Network To manage a Switch using the web interface over an IP network 1 Check that you have the IP protocol correctly installed on your management workstation You can check this by ...

Страница 38: ...twork Supervisor application that is provided on the CD ROM that accompanies your Switch to provide SNMP management for your Switch If you use 3Com Network Supervisor it automatically loads the correct MIBs and necessary files onto your workstation Pre requisites Documentation supplied with the SNMP network management application software To manage your Switch using an SNMP network management appl...

Страница 39: ...rdware Problems Solving Communication Problems If you experience a problem that is not listed here it may be included in the support section of the Superstack 3 Switch Management Interface Reference Guide on the CD ROM that accompanies your Switch To ensure this product provides optimum performance high speed fans are used to provide ventilation These fans have a high audible output For Technical ...

Страница 40: ... Test POST because of an internal problem The fault type will be indicated on the unit LEDs Contact your supplier for advice A link is connected and yet the Status LED for the port does not light Check that The Switch and the device at the other end of the link or cable are connected securely The devices at both ends of the link are powered up The quality of cable is satisfactory Auto negotiation ...

Страница 41: ...fan fail trap is received 1 Power cycle the unit To do this remove and reconnect the AC mains supply If the unit has no AC mains supply remove and reconnect the DC RPS supply 2 Check the command line interface system summary command to determine whether a thermal shutdown has occurred 3 If no return the unit If yes check that The air vents are not obstructed The ambient temperatures and environmen...

Страница 42: ...ork management application for example 3Com Network Supervisor The following is an brief overview of IP addressing and how to obtain a registered IP address IP Addressing To be managed correctly each device on your network for example a Switch or Hub must have a unique IP address IP addresses have the format n n n n where n is a decimal number between 0 and 255 An example IP address is 192 168 100...

Страница 43: ... time of publication World Wide Web site http www internic net If your IP network is internal to your organization only that is you do not access the Internet you may use any arbitrary IP address as long as it is not being used by another device on your network 3Com suggests you use addresses in the series 192 160 100 X where X is a number between 1 and 254 with a subnet mask of 255 255 255 0 Thes...

Страница 44: ...44 CHAPTER 4 PROBLEM SOLVING ...

Страница 45: ... remove the unit AVERTISSEMENT Les avertissements présentent des consignes que vous devez respecter pour garantir votre sécurité personnelle Vous devez respecter attentivement toutes les consignes Nous vous demandons de lire attentivement les consignes suivantes de sécurité avant d installer ou de retirer l appareil VORSICHT Vorsicht enthalten Anweisungen die Sie zu Ihrer eigenen Sicherheit befolg...

Страница 46: ...h an EN60320 IEC320 appliance inlet U S A and Canada The cord set must be UL approved and CSA certified The minimum specification for the flexible cord is No 18 AWG Type SV or SJ 3 conductor The cord set must have a rated current capacity of at least 10A The attachment plug must be an earth grounding type with a NEMA 5 15P 15A 125V or NEMA 6 15P 15A 250V configuration United Kingdom only The suppl...

Страница 47: ... 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 jack...

Страница 48: ...er look at the transmit laser while it is powered up Never look directly at the fiber ports and fiber cable ends when they are powered up WARNING Use of controls or adjustments of performance or procedures other than those specified herein may result in hazardous laser emissions ...

Страница 49: ...e doit respecter une configuration qui permet un branchement sur une entrée d appareil EN60320 CEI 320 Etats Unis et Canada Le cordon doit avoir reçu l homologation des UL et un certificat de la CSA Le cordon souple doit respecter à titre minimum les spécifications suivantes calibre 18 AWG type SV ou SJ à 3 conducteurs Le cordon doit être en mesure d acheminer un courant nominal d au moins 10 A La...

Страница 50: ...d accès RJ 45 Ceux ci sont protégés par des prises de données Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard ni pour la connection de l unité à un réseau téléphonique central privé ou public Raccorder seulement connecteurs de données RJ 45 systèmes de réseaux de téléphonie ou téléphones de réseaux à ces prises Il est possible de raccorder des câbles protégés o...

Страница 51: ...s tension Ne regardez jamais directement le port à fibres optiques et les embouts de câbles à fibres optiques tant qu ils sont sous tension AVERTISSEMENT L utilisation de contrôles de réglages de performances ou de procédures autres que ceux qui sont spécifiés au sein du présent document risquent d entraîner l exposition à des rayonnements laser dangereux ...

Страница 52: ...wendet werden soll VORSICHT Der Gerätestecker der Anschluß an das Gerät nicht der Wandsteckdosenstecker muß eine passende Konfiguration für einen Geräteeingang gemäß EN60320 IEC320 haben VORSICHT Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein Die Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden VORSICHT E...

Страница 53: ...ist Der Einschubmontagesatz alleine reicht nicht aus um das Gewicht des Switch zu tragen VORSICHT Ist kein Erweiterungsmodul installiert überprüfen Sie bitte den Sitz der Stanzplatte indem Sie alle Schrauben mit einem geeigneten Werkzeug anziehen VORSICHT Bevor Sie den Schalter 4950 an das Stromversorgungsmodul Typ 3 anschließen lesen Sie bitte die Sicherheitshinweise in der Bedienungsanleitung fü...

Страница 54: ...54 APPENDIX A SAFETY INFORMATION ...

Страница 55: ...B PIN OUTS Null Modem Cable 9 pin to RS 232 25 pin PC AT Serial Cable 9 pin to 9 pin ...

Страница 56: ...11 Pin assignments Pin Number 10 100BASE T 1000BASE T 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 Bidirectional Data C 6 Receive Data Bidirectional Data B 7 Not assigned Bidirectional Data D 8 Not assigned Bidirectional Data D ...

Страница 57: ...ed as MDIX 1 Receive Data Bidirectional Data B 2 Receive Data Bidirectional Data B 3 Transmit Data Bidirectional Data A 4 Not assigned Bidirectional Data D 5 Not assigned Bidirectional Data D 6 Transmit Data Bidirectional Data A 7 Not assigned Bidirectional Data C 8 Not assigned Bidirectional Data C ...

Страница 58: ...58 APPENDIX B PIN OUTS ...

Страница 59: ...0 W watts maximum 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 VCCI Class A AS NZS 3548 Class A CNS 13438 Class A EN61000 3 2 Immunity EN 55024 Heat Dis...

Страница 60: ...NMP 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 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 ...

Страница 61: ...ormation on the 3Com Corporation World Wide Web site enter this URL into your Internet browser http www 3com com This service provides access to online support information such as technical documentation and software as well as support options that range from technical education to maintenance and professional services 3Com Knowledgebase Web Services This 3Com Knowledgebase is a database of techni...

Страница 62: ...intenance application training and support services When you contact your network supplier for assistance have the following information ready Product model name part number and serial number A list of system hardware and software including revision levels Diagnostic error messages Details about recent configuration changes if applicable If you are unable to contact your network supplier see the f...

Страница 63: ...63 00798 611 2230 or 02 3455 6455 0080 611 261 001 800 611 2000 Europe Middle East and Africa From anywhere in these regions call 44 0 1442 435529 phone 44 0 1442 432524 fax Europe and South Africa From the following countries you may use the following toll free numbers Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Luxembourg 0800 297468 0800 71429 800 17309 0800 1131...

Страница 64: ...Peru Uruguay Venezuela 0810 222 3266 511 241 1691 0800 133266 or 55 11 5643 2700 525 201 0004 562 240 6200 525 201 0004 525 201 0004 525 201 0004 525 201 0004 511 241 1691 525 201 0004 525 201 0004 From the following countries you may call the toll free numbers select option 2 and then option 2 Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Netherlands Norway Poland Po...

Страница 65: ... 8 cross over configuration 24 D default settings 17 users 30 E Ethernet address of the Switch 16 F factory defaults 17 G GBIC ports 14 transceivers 25 H hardware features 12 I installing the Switch 19 prerequisites 21 IP addressing registered 43 setting up for management 31 L LEDs 15 logging in as a default user 30 M MAC address of the Switch 16 management methods 34 setting up 29 MDI configurati...

Страница 66: ... 16 Simple Network Management Protocol See SNMP SNMP 38 SNMP management 35 setting up 38 socket power 16 RPS 16 specifications system 59 straight through configuration 24 Switch 4950 3C number 16 dimensions 59 Ethernet address 16 features 12 installation 19 21 MAC address 16 power socket 16 powering up 23 product name 16 rack mounting 21 RPS socket 16 serial number 16 size 59 unit information labe...

Страница 67: ... the equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV...

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