3com 1000 Uživatelský manuál

®http://www.3com.com/SuperStack® II Switch 1000User GuideAgent Software Version 3.1Document No. DUA1690-0AAA05Published June 1997

1-2 CHAPTER 1: GETTING STARTEDPort Connections10BASE-T PortsThe Switch has 12 or 24 10BASE-T ports config-ured as MDIX (cross-over), which provide a f

5-26 CHAPTER 5: ADVANCED MANAGEMENT RMON and the SwitchRMON requires one probe per LAN segment, and stand-alone RMON probes have traditionally been ex

RMON 5-27When using the RMON features of the Switch, you should note the following: After the default sessions are created, they have no special statu

5-28 CHAPTER 5: ADVANCED MANAGEMENT About Alarm ActionsYou can define up to 700 alarms for the Switch. The actions that you can define for each alarm

RMON 5-29About Default Alarm SettingsA new or initialized Switch has four alarms defined for each port: Bandwidth used Broadcast bandwidth used Percen

5-30 CHAPTER 5: ADVANCED MANAGEMENT

6STATUS MONITORING AND STATISTICSThis chapter describes how to view the current operating status of the Switch 1000, how to dis-play any error informa

6-2 CHAPTER 6: STATUS MONITORING AND STATISTICSSummary StatisticsWith the Switch Management screen displayed, choose the management level Unit, then s

Port Statistics 6-3Port StatisticsWith the Switch Management screen displayed, choose the management level Port, then select the STATISTICS button. Th

6-4 CHAPTER 6: STATUS MONITORING AND STATISTICSPort Traffic StatisticsWith the Port Statistics screen displayed, select the TRAFFIC STATISTICS button.

Port Traffic Statistics 6-5Fragments The total number of packets received that were not an integral number of octets in length or that had a bad Frame

About the Switch 1000 1-3Switch Operation and FeaturesHow Does the Switch Compare to a Bridge?The table below shows how Switch 1000 operation compares

6-6 CHAPTER 6: STATUS MONITORING AND STATISTICSPort Error AnalysisWith the Port Statistics screen displayed, select the ERROR ANALYSIS button. The Por

Port Error Analysis 6-7Jabbers The total number of packets received that were longer than 8K octets (excluding framing bits, but including FCS octets)

6-8 CHAPTER 6: STATUS MONITORING AND STATISTICSStatus MonitoringThe status screen provides read-only information about the Switch 1000. This informati

Fault Log 6-9Fault LogThe Fault Log displays read-only information about the Switch which is updated whenever an abnor-mal condition is detected. This

6-10 CHAPTER 6: STATUS MONITORING AND STATISTICSRemote PollingThe Remote Poll screen allows you to send a single frame to a remote device to see if th

ASAFETY INFORMATIONYou must read the following safety information before carrying out any installation or removal of components, or any maintenance pr

A-2 APPENDIX A: SAFETY INFORMATION It is essential that the mains socket outlet is installed near to the unit and is accessible. You can only disconne

Important Safety Information A-3Power Supply and FuseThe unit automatically adjusts to the supply volt-age. The fuse is suitable for both 110V A.C. an

A-4 APPENDIX A: SAFETY INFORMATIONL’information de Sécurité ImportanteAVERTISSEMENT: Les avertissements contiennent les directions que vous devez sui

L’information de Sécurité Importante A-5 Assurer que l'entrée de la source d'alimentation soit débranchée avant d'ouvrir le couvercle d

1-4 CHAPTER 1: GETTING STARTEDTo best suit your networking requirements, the Switch 1000 allows you to select one of four frame forwarding modes: Fast

A-6 APPENDIX A: SAFETY INFORMATIONLes Ports RJ45Ceux-ci sont les prises de courant de données RJ45 protégées. Ils ne peuvent pas être utilisés comme

Wichtige Sicherheitsinformationen A-7Wichtige SicherheitsinformationenWARNUNG: Warnungen enthalten Anweisungen, die zur eigenen Sicherheit unbedingt z

A-8 APPENDIX A: SAFETY INFORMATIONStromversorgung und SicherungDas Gerät stellt sich automatisch auf die Versor-gungsspannung ein. Die Sicherung ist s

BSCREEN ACCESS RIGHTSThe following table lists the rights assigned to each level of user for accessing and editing Switch 1000 screens via the VT100 i

B-2 APPENDIX B: SCREEN ACCESS RIGHTSVLAN STP Monitor read-onlyManager Security VLAN Server Monitor read-onlyManager Security VLAN Setup Monitor read-o

C T R O U B L E - S H O O T I N GThe following is a list of problems you may see when managing the Switch with suggested courses of corrective action

C-2 APPENDIX C: TROUBLE-SHOOTINGUsing the VT100 InterfaceThe initial Main Banner screen does notdisplay:Check that your terminal or terminal emulator

Using the Switch C-3Try accessing the device through a different port. If you can now access the device, a problem with the original port is indicated

C-4 APPENDIX C: TROUBLE-SHOOTINGYou have added the Switch 1000 to an already busy network, and response times and traffic levels have increased:You ma

Using the Switch C-5To avoid this situation, we recommend that you connect the two SuperStack II Switch units using a Virtual LAN Trunk (VLT). For mor

About the Switch 1000 1-5For more information about enabling full duplex, refer to “Setting Up the Switch Unit” and “Setting Up the Switch Ports” in C

C-6 APPENDIX C: TROUBLE-SHOOTING

DPIN-OUTSNull Modem Cable9-pin to RS-232 25-pinPC-AT Serial Cable9-pin to 9-pin

D-2 APPENDIX D: PIN-OUTSModem Cable9-pin to RS-232 25-pinRJ45 Pin AssignmentsPin assignments are identical for 10BASE-T and 100BASE-TX RJ45 connectors

ESWITCH 1000 TECHNICAL SPECIFICATIONSPhysical Dimensions Height: 76mm (3.0in.) x Width: 483mm (19.0in.) x Depth: 300mm (12.0in.) Weight: 4.4kg (9.7lbs

E-2 APPENDIX E: SWITCH 1000 TECHNICAL SPECIFICATIONSStandards Supported SNMPSNMP protocol (RFC 1157)MIB-II (RFC 1213)Bridge MIB (RFC 1493)Repeater MIB

FTECHNICAL SUPPORT3Com provides easy access to technical support information through a variety of services. This appendix describes these services.Inf

F-2 APPENDIX F: TECHNICAL SUPPORTAccess by Digital ModemISDN users can dial in to 3ComBBS using a digital modem for fast access up to 56 Kbps. To acce

Support from Your Network Supplier F-3Support from Your Network SupplierIf additional assistance is required, contact your network supplier. Many supp

F-4 APPENDIX F: TECHNICAL SUPPORTReturning Products for RepairBefore you send a product directly to 3Com for repair, you must first be obtain a Return

GLOSSARY10BASE-TThe IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP) cabling.100BASE-FX100Mbps Ethernet implementation over fi

1-6 CHAPTER 1: GETTING STARTED Redundant paths are enabled if the main traffic paths fail.For more information about STP, refer to “Spanning Tree Prot

2 GLOSSARYbridgeA device that interconnects local or remote net-works no matter what higher level protocols are involved. Bridges form a single logica

GLOSSARY3Intelligent Switching ModeA packet forwarding mode, where the Switch moni-tors the amount of error traffic on the network and changes the met

4 GLOSSARYprotocolA set of rules for communication between devices on a network. The rules dictate format, timing, sequencing and error control.resili

GLOSSARY5switchA device which filters, forwards and floods frames based on the frame’s destination address. The switch learns the addresses associated

6 GLOSSARY

INDEXNumerics100BASE-TX port 1-2, 1-1110BASE-T port 1-2, 1-113Com Bulletin Board Service (3ComBBS) F-13Com sales offices F-33Com URL F-13ComFacts F-23

2 INDEXresetting to zero 6-2, 6-5, 6-7Short Events (port error) 6-6Create User screen 4-3DData Link Protocol field 3-10database. See Switch DatabaseDC

INDEX3Standby Links Available 4-20STANDBY Port 4-22Standby Port ID 4-20Stop Bit 4-26STP State 5-20sysName 4-9System Up Time 6-8Throttle 4-24, 5-11Time

4 INDEXpermanent entries 4-16displaying 4-17specifying 4-17, 4-18pin assignmentsmodem cable D-2null modem cable D-1RJ45 D-2serial cable D-1pin-outs D-

INDEX5serial port. See console portServer Address field 4-29servers, connecting 1-6SLIP Address field 3-10SLIP Subnet Mask field 3-10SNMP 1-14, 3-6Com

Switch 1000 on Your Network 1-7Network Segmentation IThis example shows how the Switch 1000 fits intoa large corporate network with a Fast Ethernetinf

6 INDEXediting 4-5setting up 4-2Vversion numberboot software 6-8hardware 6-8upgradable software 6-8Virtual LAN Trunks. See VLTsVirtual LANs. See VLANs

3Com Corporation LIMITED WARRANTYHARDWARE3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use an

ELECTRO-MAGNETIC COMPATIBILITYFCC STATEMENTThis equipment has been tested with a class A computing device and has been found to comply with part 15 of

1-8 CHAPTER 1: GETTING STARTEDNetwork Segmentation IIThis example shows the Switch 1000 in a secondworkgroup situation. This setup could be that of as

Switch 1000 on Your Network 1-9Desktop SwitchingThis example shows Switch 1000 used for a group ofheavy-traffic users in a large corporate network. He

1-10 CHAPTER 1: GETTING STARTEDUnit Overview — FrontFigure 1-4 Switch 1000 front view: 3C16901A top, 3C16900A bottom

Unit Overview — Front 1-1110BASE-T PortsThe Switch has 12 or 24 10BASE-T RJ45 ports con-figured as MDIX (cross-over), which provide a full 10Mbps band

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145Copyright © 3Com Ireland, 1997. All rights reserved. No part of this d

1-12 CHAPTER 1: GETTING STARTED U nit Overview — RearFigure 1-5 Switch 1000 rear view

Unit Overview — Rear 1-13Power SocketThe Switch 1000 automatically adjusts to the supply voltage. The fuse is suitable for both 110V A.C. and 220–240V

1-14 CHAPTER 1: GETTING STARTEDUnit DefaultsThe following table shows the factory defaults for the Switch 1000 features.Managing the Switch 1000The me

Quick Start For SNMP Users 1-15Quick Start For SNMP UsersThis section describes how to get started if you want to use an SNMP Network Manager to manag

1-16 CHAPTER 1: GETTING STARTED

2 I N S T A L L A T I O N A N D S E T U PFollowing Safety InformationBefore installing or removing any components from the Switch, or carrying out

2-2 CHAPTER 2: INSTALLATION AND SETUPConfiguration Rules for Fast EthernetThe topology rules for 100Mbps Fast Ethernet are slightly different to those

Configuration Rules with Full Duplex 2-3Figure 2-1 Fast Ethernet configuration rules

2-4 CHAPTER 2: INSTALLATION AND SETUPInstalling the Switch 1000Rack MountingThe Switch is 1.5U high and fits in most standard 19-inch racks.CAUTION: D

Installing the Switch 1000 2-5Wall MountingA single Switch can be wall-mounted.CAUTION: Disconnect any cables from the unit before continuing. Remove

CONTENTSABOUT THIS GUIDEIntroduction 1How to Use This Guide 1Conventions 2Related Documentation 21GETTING STARTEDAbout the Switch 1000 1-1Summary of F

2-6 CHAPTER 2: INSTALLATION AND SETUPPowering-up the Switch1Connect the power cord to the IEC socket on the rear of the Switch, and to your mains sock

Connecting Equipment to the Console Port 2-7Connecting Equipment to the Console PortThe Switch console port settings are set to: 8 data bits no parity

2-8 CHAPTER 2: INSTALLATION AND SETUPConnecting a Workstation Running SLIPYou can communicate with the Switch via the con-sole port from a workstation

3SETTING UP FOR MANAGEMENTMethods of Managing the Switch 1000You can manage the Switch in four ways: Using the VT100 interface by connecting a VT100 t

3-2 CHAPTER 3: SETTING UP FOR MANAGEMENTUsing TelnetAny Telnet facility that emulates a VT100 terminal should be able to communicate with the Switch o

Managing Over The Network 3-3If your network is internal to your organization only, you may use any arbitrary IP address. We sug-gest you use addresse

3-4 CHAPTER 3: SETTING UP FOR MANAGEMENTNavigating the VT100 ScreensScreen ConventionsTo differentiate types of information, the VT100 screens use the

Navigating the VT100 Screens 3-5Keyboard ShortcutsThere are several special characters or combinations of characters that allow you to make shortcuts.

3-6 CHAPTER 3: SETTING UP FOR MANAGEMENTSetting Up the Switch for ManagementThe following sections describe how to get started if you want to use an S

Setting Up the Switch for Management 3-7Logging OnAt the Logon screen displayed in Figure 3-2, enter your user name and password (note that they are b

Configuration Rules for Fast Ethernet 2-2Configuration Rules with Full Duplex 2-2Installing the Switch 1000 2-4Rack Mounting 2-4Stacking the Switch an

3-8 CHAPTER 3: SETTING UP FOR MANAGEMENTAfter Logging OnWhen you have successfully logged on to the Switch, the Main Menu screen is displayed as shown

Setting Up the Switch for Management 3-9Switch Management SetupThe Management Setup screen allows you to con-figure IP, IPX and SLIP parameters for th

3-10 CHAPTER 3: SETTING UP FOR MANAGEMENTIf you suspect that there is a problem with the Switch that has not been detected by the Normal tests, set th

Setting Up the Switch for Management 3-11SETUP TRAPS Select this button to display the setup screen for trap parameters. Trap setup is described in “S

3-12 CHAPTER 3: SETTING UP FOR MANAGEMENTLogging OffIf you have finished using the VT100 management interface, select the LOGOFF option from the botto

4 M A N A G I N G T H E S W I T C H 1000Chapters 4, 5 and 6 describe all management facilitiesfor the Switch 1000. While following steps in thesech

4-2 CHAPTER 4: MANAGING THE SWITCH 1000Setting Up UsersFrom the Main Menu, select USER ACCESS LEVELS. The User Access Levels screen appears as shown i

Creating a New User 4-3Creating a New UserThese steps assume the User Access Levels screen is displayed.1Select the CREATE USER option. The Create Use

4-4 CHAPTER 4: MANAGING THE SWITCH 1000Deleting a UserThese steps assume the User Access Levels screen is displayed.1Select the DELETE USERS option. T

Editing User Details 4-5Editing User DetailsThese steps assume the User Access Levels screen is displayed.1Select the EDIT USER option. The Edit User

How VLANs Ease Change and Movement 5-2How VLANs Control Broadcast Traffic 5-2How VLANs Provide Extra Security 5-2An Example 5-2VLANs and the Switch 5-

4-6 CHAPTER 4: MANAGING THE SWITCH 1000Assigning Local SecurityThe Local Security screen shows a matrix of options for access method (Console Port, Re

Choosing a Switch Management Level 4-7Choosing a Switch Management LevelThe Switch Management screen allows you to: Choose between managing a port, th

4-8 CHAPTER 4: MANAGING THE SWITCH 1000STP Use this button to display screens for managing Spanning Tree Protocol (STP) information for the level of m

Setting Up the Switch Unit 4-9Setting Up the Switch UnitWith the Switch Management screen displayed, choose the management level Unit, then select the

4-10 CHAPTER 4: MANAGING THE SWITCH 1000PACE Enable / Disable This field allows you to enable or disable PACE (Priority Access Control Enabled) for al

Setting Up the Switch Unit 4-11SDB Ageing Time This field allows you to specify the ageing time (hours:minutes) for all non-perma-nent entries in the

4-12 CHAPTER 4: MANAGING THE SWITCH 1000Setting Up the Switch PortsWith the Switch Management screen displayed, choose the management level Port. Choo

Setting Up the Switch Ports 4-13IFM is not available on a port which has full duplex enabled: If the Duplex Mode field in this screen is set to Full D

4-14 CHAPTER 4: MANAGING THE SWITCH 1000Duplex Mode Half Duplex / Full Duplex / Unit Default This field allows you to specify the duplex mode of the p

Setting Up the Switch Ports 4-15Rising Action none / event / disable port / disable port/notify / blip / blip port/notify Use this field to specify th

Fault Log 6-9Remote Polling 6-10ASAFETY INFORMATIONImportant Safety Information A-1Power Supply and Fuse A-3Sockets for Redundant Power System (RPS) A

4-16 CHAPTER 4: MANAGING THE SWITCH 1000Setting Up the Switch Database (SDB)The Switch maintains a database of device addresses that it receives on it

Setting Up the Switch Database (SDB) 4-17The Database ViewThe Unit Database View screen, as shown in Figure 4-12, allows you to view and configure the

4-18 CHAPTER 4: MANAGING THE SWITCH 1000INSERT This button lets you insert an entry into the database. You cannot insert an entry for a port which use

Setting Up Resilient Links 4-19 Setting Up Resilient LinksYou can configure a Switch to provide resilient links to another device so that network disr

4-20 CHAPTER 4: MANAGING THE SWITCH 1000Configuring Resilient LinksWith the Switch Management screen displayed, choose the port that will be set up as

Setting Up Resilient Links 4-21 Both Failed — Although the resilient link is cor-rectly configured, both links have failed. This could be due to loose

4-22 CHAPTER 4: MANAGING THE SWITCH 1000Viewing the Resilient SetupWith the Switch Management screen displayed, choose the management level Unit and s

Setting Up Resilient Links 4-23Pair Enable Enabled / Disabled This read-only field displays whether the resilient link pair is currently enabled or d

4-24 CHAPTER 4: MANAGING THE SWITCH 1000Setting Up TrapsTraps are messages sent across the network to an SNMP Network Manager. They alert the network

Setting Up the Console Port 4-25Setting Up the Console PortFrom the Switch Management Setup screen, described in Chapter 3, select the CONSOLE PORT bu

ABOUT THIS GUIDEAbout This Guide provides an overview of this guide, describes the guide conventions, tells you where to look for specific information

4-26 CHAPTER 4: MANAGING THE SWITCH 1000Speed 1200 / 2400 / 4800 / 9600 / 19200 This field allows you to select the correct line speed (baud rate) for

Resetting the Switch 4-27Resetting the Switch If you suspect a problem with the Switch, you can reset it.1From the Main Menu, select the RESET option.

4-28 CHAPTER 4: MANAGING THE SWITCH 1000Initializing the SwitchThis screen allows you to perform a reset as described in the previous section, and in

Upgrading Software 4-29Upgrading SoftwareWhen 3Com issues a new version of agent software for the Switch, you can obtain it from the 3Com’s informatio

4-30 CHAPTER 4: MANAGING THE SWITCH 10005Select OK.During the download, the MGMT LED flashes green and the screen is locked. When the download is comp

5ADVANCED MANAGEMENTVirtual LANs (VLANs)Setting up Virtual Local Area Networks (VLANs) on the Switch 1000 provides you with less time-consuming networ

5-2 CHAPTER 5: ADVANCED MANAGEMENTHow VLANs Ease Change and MovementWith traditional IP networks, network administra-tors spend much of their time dea

Virtual LANs (VLANs) 5-3VLANs and the SwitchThe Switch 1000 supports VLANs which consist of a set of switch ports. Each switch port can only belong to

5-4 CHAPTER 5: ADVANCED MANAGEMENTAutoSelect VLAN Mode works as follows:1When an endstation is connected to a Switch or moves from one port to another

Virtual LANs (VLANs) 5-5For information about how to set up VLANs using AutoSelect VLAN Mode, refer to Chapter 5 on page 5-11.For more information abo

2 ABOUT THIS GUIDEConventionsTable 1 and Table 2 list conventions that are used throughout this guide.Related DocumentationThe Switch 1000 document se

5-6 CHAPTER 5: ADVANCED MANAGEMENTExample 2The example shown in Figure 5-6 illustrates two VLANs spanning two Switch 1000 units. VLAN 1 is able to tal

Virtual LANs (VLANs) 5-7Example 3The example shown in Figure 5-7 illustrates two VLANs spanning three Switch 1000 units and a basement Switch 3000 FX

5-8 CHAPTER 5: ADVANCED MANAGEMENTSetting Up VLANs on the SwitchThe VLAN Setup screen allows you to: Assign ports to VLANs, if those ports use Port VL

Virtual LANs (VLANs) 5-9 AutoSelect — The port uses AutoSelect VLAN Mode. For more information about AutoSe-lect VLAN Mode, refer to “Using AutoSelect

5-10 CHAPTER 5: ADVANCED MANAGEMENTAssigning a Port to a VLAN When Using Port VLAN Mode1In the Port ID field, enter the ID of the required port.2In th

Virtual LANs (VLANs) 5-11Setting Up VLANs Using AutoSelect VLAN ModeTo set up VLANs using AutoSelect VLAN Mode, you need to: Specify information about

5-12 CHAPTER 5: ADVANCED MANAGEMENT Spanning Tree ProtocolUsing the Spanning Tree Protocol (STP) functionality of your Switch makes your network more

Spanning Tree Protocol 5-13Figure 5-10 A network configuration that creates loops.Figure 5-11 Traffic flowing through Bridges C and AFigure 5-12

5-14 CHAPTER 5: ADVANCED MANAGEMENTHow STP WorksSTP InitializationInitially, the STP system requires the following before it can configure the network

Spanning Tree Protocol 5-15An ExampleFigure 5-13 illustrates part of a network. All bridges have a path cost value assigned to each port, identi-fied

1GETTING STARTEDAbout the Switch 1000Part of 3Com’s SuperStack® II range of products, the Switch 1000 is designed to overcome the common problem of in

5-16 CHAPTER 5: ADVANCED MANAGEMENTSTP ConfigurationsFigure 5-14 shows two possible STP configurations using SuperStack II Switch units: Configuration

Spanning Tree Protocol 5-17Enabling STP on the SwitchTo enable STP on your Switch:1From the VT100 Main Menu, select SWITCH MAN-AGEMENT. The Switch Man

5-18 CHAPTER 5: ADVANCED MANAGEMENTConfiguring STP on the SwitchCAUTION: You should not configure any STP parameters unless you have considerable know

Spanning Tree Protocol 5-19Forward Delay 4...30 This read-only field shows the time (in seconds) that the ports on the Switch spend in the listening a

5-20 CHAPTER 5: ADVANCED MANAGEMENTConfiguring the STP Parameters of PortsThe Port STP screen allows you to set up and manage the STP parameters of ea

Spanning Tree Protocol 5-21Designated Root This read-only field shows the Bridge Identifier of the Root Bridge.Designated Cost This read-only field sh

5-22 CHAPTER 5: ADVANCED MANAGEMENTRMONUsing the RMON (Remote Monitoring) capabilities of your Switch allows network administrators to improve their e

RMON 5-23About the RMON GroupsThe IETF define nine groups of Ethernet RMON sta-tistics. This section describes these groups, and details how they can

5-24 CHAPTER 5: ADVANCED MANAGEMENTMatrixThe Matrix group shows the amount of traffic and number of errors between pairs of devices on a LAN segment o

RMON 5-25Benefits of RMONUsing the RMON features of your Switch has three main advantages: It improves your efficiency It allows you to manage your ne