3Com OFFICECONNECT ETHERNET HUB 8 User Manual Download

Page: 53 / 130

Setting Up the Alert LED

4-17

Coax Port Partition

Enabled /

Disabled

Allows you to specify whether the Alert LED lights if

the coaxial port becomes partitioned.

If this condition is resolved after causing the Alert

LED to light, the LED goes off (it stays lit if other

conditions also caused it to light).

Login Violation

Enabled /

Disabled

Allows you to specify whether the Alert LED lights if

a login violation occurs, which happens if a user

attempts to log on to your hub using the VT100

screens with an invalid username/password

combination three consecutive times.

If this condition caused the Alert LED to light, the

LED goes off after you have acknowledged the alert

by pressing the associated

Ack

button (the LED stays

lit if other conditions also caused it to light).

Port Security Violation

Enabled /

Disabled

Allows you to specify whether the Alert LED lights if

a port security violation occurs, which happens if an

unauthorized device attempts to communicate

through your hub.

If this condition caused the Alert LED to light, the

LED goes off after you have acknowledged the alert

by pressing the associated

Ack

button (the LED stays

lit if other conditions also caused it to light).

Authentication Failure

Enabled /

Disabled

Allows you to specify whether the Alert LED lights if

an authentication failure occurs, which happens if a

user attempts to access information on your hub

using an invalid community string.

If this condition caused the Alert LED to light, the

LED goes off after you have acknowledged the alert

by pressing the associated

Ack

button (the LED stays

lit if other conditions also caused it to light).

WorkGroup Monitor Failure

Enabled /

Disabled

Allows you to specify whether the Alert LED lights if

workgroup monitor f

ailure occurs, which happens if

a remote device fails to respond to a

workgroup

monitor p

oll from your hub.

If this condition caused the Alert LED to light, the

LED goes off after you have acknowledged the alert

by pressing the associated

Ack

button (the LED stays

lit if other conditions also caused it to light).

16710.bk : MANAGING.FRM Page 17 Tuesday, October 7, 1997 11:38 AM

Summary of Contents for OFFICECONNECT ETHERNET HUB 8

Page 1: ...Part No DUA1671 0AAA03 Published October 1997 OFFICECONNECT HUB 8 TPM 3C16710 USER GUIDE 16710 bk FRONT FRM Page 1 Tuesday October 7 1997 11 38 AM ...

Page 2: ...re clause at 48 C F R 52 227 7013 3Com Technologies c o 3Com Centre Boundary Way Hemel Hempstead Herts HP2 7YU UK For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard...

Page 3: ...g the OfficeConnect Hub 2 5 Using the Rubber Feet and Stacking Clips 2 6 Wall Mounting the OfficeConnect Hub 2 7 Connecting Workstations and Other Equipment to Your Hub 2 7 Connecting OfficeConnect Hubs Together 2 8 Spot Checks 2 11 ABOUT NETWORK MANAGEMENT 3Com Network Management 3 1 Why Manage Your Hub 3 2 Connecting to the Hub and Managing 3 3 Managing Through the Console Port 3 4 Managing Over...

Page 4: ...a Port 4 25 Hub Security 4 28 Configuring Security at Port Level 4 29 Configuring Security at Hub Level 4 31 Resilience 4 33 Setting Up a Resilient Link Pair 4 34 Using the Hub to Monitor Other Devices 4 37 Additional Management 4 39 ADDITIONAL MANAGEMENT USING VT100 VT100 User Interface 5 1 Screens 5 1 Screen Components 5 2 Special Keystrokes 5 3 Repeater Unit and Port Screens 5 4 Screen Map 5 4 ...

Page 5: ...ards A 1 Cabling A 2 10BASE T A 2 Console Port A 3 IP AND IPX ADDRESSES IP Addresses B 1 Obtaining a Network Number B 2 How IP Addresses Work B 3 Assigning IP Addresses to a Small Contained Network B 5 IPX Addresses B 6 TECHNICAL SUPPORT Online Technical Services C 1 World Wide Web Site C 1 3Com Bulletin Board Service C 1 3ComFacts Automated Fax Service C 2 3ComForum on CompuServe Online Service C...

Page 6: ...16710 bk 16710 TOC Page vi Tuesday October 7 1997 11 38 AM ...

Page 7: ...ower to the OfficeConnect hub by disconnecting the power adapter from the unit or from the socket outlet This unit operates under SELV conditions Safety Extra Low Voltage according to IEC 950 the conditions of which are maintained only if the equipment to which it is connected is also operational under SELV There are no user replaceable fuses or user serviceable parts inside the hub If you have a ...

Page 8: ...e ziehen oder die Verbindung zum Gerät unterbrechen Dieser Hub arbeitet mit SELV Spannung Safety Extra Low Voltage Sicherheitskleinspannung gemäß IEC950 Diese Bedingungen werden nur eingehalten wenn die Geräte mit denen der Hub verbunden ist ebenfalls mit SELV Spannung arbeiten Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Gerät vorhanden Wenn Sie ein Problem mit dem H...

Page 9: ...ranchant la pièce de raccordement d alimentation de l unité ou du socle de prise de courant Ce moyeu fonctionne sous les conditiones SELV Sécurité du Voltage le plus Bas d après IEC950 les conditions desquelles sont maintenues seulement si le matériel à qui il est branché est aussi en exploitation sous SELV Il n y a pas de parties remplaceables par les utilisateurs ou entretenues par les utilisate...

Page 10: ... to allow you to continue managing the hub If you want to return the hub to its default address settings you must enter them manually For information on configuring the hub s address settings see Giving the Hub an IP Address on page 4 7 Parameter Default Your Setting Device Name 3Com Emergency Contact 3Com Support Contract 3Com IP Address 0 0 0 0 Subnet Mask 0 0 0 0 Serial Line IP Address 192 168 ...

Page 11: ...information in this guide and use the information given for reference purposes There is a Quick Reference Guide accompanying this guide It contains some useful information from this guide which you may need to refer to regularly How to Use This Guide This table shows where to find specific information If you are looking for information on Turn to The hub and networking terms Chapter 1 Creating you...

Page 12: ... Do not press the Return or Enter key when an instruction simply says type Text represented as screen display This typeface is used to represent displays that appear on your screen for example Enter the IP address Text represented as commands This typeface is used to represent commands that you enter for example 191 0 0 172 Keys When specific keys are referred to in the text they are called out by...

Page 13: ... desktop use and is part of the OfficeConnect range which neatly stack together with clips providing a host of facilities for example print sharing and a network fax For information on these products see 3Com provides easy access to technical support information through a variety of services This appendix describes these services on page C 1 A single OfficeConnect hub allows you to create a small ...

Page 14: ... A Local Area Network LAN is a network usually in an office that spans no more than a single site Ethernet is a type of LAN referring to the technology used to pass information around the network 10BASE T is the name given to the Ethernet protocol that runs over Twisted Pair TP cable The OfficeConnect hub uses RJ45 type connectors for connecting your network 10BASE 2 is the name given to the Ether...

Page 15: ...ons can also indicate faulty cabling Device is a term that is usually used to refer to a piece of network equipment Every device has a unique address that is used to identify it on the network SNMP Simple Network Management Protocol is a protocol that controls how a management station gains information from a device SNMP provides A set of rules that define how a management station can communicate ...

Page 16: ...to IP SLIP Serial Line Internet Protocol allows you to run the IP protocol over a serial line connection VT100 is a type of terminal which uses ASCII characters VT100 screens have a text based appearance Telnet is a network application which enables a workstation to connect to a device as if it were a terminal such as VT100 It is provided as part of IP and is commonly available with SNMP network m...

Page 17: ...hub to other OfficeConnect hubs LEDs and Ports The hub features diagnostic LEDs and easy to use ports The LEDs are shown in Figure 2 1 and are used for Showing you how the hub and its ports are operating Showing you how much your network is being used Alerting you to a potential problem with your network The ports are shown in Figure 2 2 and are used for Connecting workstations and other equipment...

Page 18: ...2 2 CHAPTER 2 CREATING YOUR NETWORK Figure 2 1 The LEDs And How To Use Them 16710 bk CREYRNET FRM Page 2 Tuesday October 7 1997 11 38 AM ...

Page 19: ...LEDs and Ports 2 3 Figure 2 2 The Ports And How To Use Them 16710 bk CREYRNET FRM Page 3 Tuesday October 7 1997 11 38 AM ...

Page 20: ... connections for all your equipment 3Com produce a range of easy to install network adapters which provide your workstations with 10BASE T connections 2 An operating system with network support configured running on your workstations 3 One Straight through 10BASE T cable for every workstation or piece of equipment A Straight through cable is one where the pins of one connector are connected to the...

Page 21: ...eces provide adequate clearance of the other ports Two 10BASE 2 50 Ohm terminators end pieces If you have additional hubs you want to connect using 10BASE T you need One Straight through 10BASE T cable for each additional hub Positioning the OfficeConnect Hub When installing your OfficeConnect hub ensure It is out of direct sunlight and away from sources of heat Cabling is away from power lines an...

Page 22: ... on a flat surface Your clips fit in the positions on the side of the unit as shown in Figure 2 3 1 2 Position a clip over one of these holes and push it in until it clicks into place as shown in Figure 2 3 2 Repeat this for the other clip position on the same side 3 Keeping the front of the units aligned rest the bottom of the existing unit on the clips spikes as shown in Figure 2 3 3 Push the cl...

Page 23: ...ush the hub up and off the wall CAUTION Only wall mount single hubs do not wall mount stacked hubs Connecting Workstations and Other Equipment to Your Hub WARNING Ensure you have read the Important Safety Information section carefully before you start ACHTUNG Versichern Sie sich daß Sie den Abschnitt mit den wichtigen Sicherheitshinweisen gelesen haben bevor Sie das Gerät benutzen AVERTISSEMENT As...

Page 24: ...inator end piece Connecting OfficeConnect Hubs Together You can increase the number of workstations that can connect to your network by adding more OfficeConnect hubs You can use either 10BASE T or 10BASE 2 Coax to do this With 10BASE 2 Coax you can connect up to 30 hubs on a single segment leaving all of the RJ45 ports free With 10BASE T you can connect up to four hubs in series CAUTION Do not co...

Page 25: ... Y pieces provide adequate clearance of the other ports Connect a 10BASE 2 Y piece to each of your hubs Daisy chain each Y piece with 10BASE 2 Coax cable to form a single segment as shown in Figure 2 4 Remember to terminate the two free ends of the segment by fitting terminators end pieces To disconnect a 10BASE 2 Coax cable twist each connector counter clockwise to unlock it and remove it Figure ...

Page 26: ...8 of the lower hub to port 7 of the hub immediately above Repeat for each hub as shown in Figure 2 5 2 Set all MDI MDIX switches to MDI in except for the top hub the one with port 8 not connected to another hub This unused port can be connected to a workstation provided that the MDI MDIX switch is set to MDIX out Figure 2 5 Correct Hub Connections Using 10BASE T 16710 bk CREYRNET FRM Page 10 Tuesd...

Page 27: ...ort is not used and is not terminated the LED should be yellow showing that it has partitioned This is correct operation Spot Checks At frequent intervals visually check that The Alert LED is not lit this is the best way to find out if there are problems with your network Case vents are not obstructed Cabling is secure and not pulled taut If you suspect there is a problem refer to Chapter 6 16710 ...

Page 28: ...2 12 CHAPTER 2 CREATING YOUR NETWORK 16710 bk CREYRNET FRM Page 12 Tuesday October 7 1997 11 38 AM ...

Page 29: ...For information on Microsoft Windows refer to the Microsoft Windows User s Guide You can also manage your hub using a VT100 terminal or any Telnet facility that emulates a VT100 terminal VT100 uses a text based user interface 3Com Network Management Quick Config Manager provides a subset of the functionality that is present in other 3Com management applications for example the IP IPX based Transce...

Page 30: ...b to refresh its statistics and use any new configurations Initialize the hub to return it to its factory settings IP and console port information is retained Display a graphical representation of the hub to quickly view the status of each port Display general hub information Configure the Alert LED to light for a number of conditions and show what conditions have triggered the Alert LED to come o...

Page 31: ... operation to an IP IPX based management application Poll a remote device to see if it is operational View any faults that have occurred with the hub Download any future software upgrades to the hub Connecting to the Hub and Managing Managing your hub is easy There are many ways you can connect your management station to your hub as shown in Figure 3 1 You can manage the hub Through the console po...

Page 32: ... for connection to the hub s console port This is available from your supplier The null modem cable must Have a 9 pin female D connector for connection to your hub and the appropriate connector for connection to your management station Not exceed 15 meters 50 feet There are a variety of null modem cables that you can use For an example of one of these see Cabling on page A 2 Connection to the cons...

Page 33: ...ion you are using needs to run suitable terminal emulation software Many VT100 terminal emulation packages are available Microsoft Windows has a terminal emulation program called HyperTerminal for Windows 95 or Terminal for other Windows versions Refer to the documentation that accompanies your particular terminal emulation package for details or consult your supplier if you need further advice Re...

Page 34: ...IPX based Network Management Application 3Com s Transcend network management applications enable you to get the best out of your hub Any IP IPX based network management application can manage the hub The use of IP IPX based network management applications is not described in this manual Refer to the user documentation that accompanies your application for more information Using a VT100 Terminal Em...

Page 35: ...ial out feature which can be set up by your supplier to inform them when your hub or network is operating incorrectly This allows your supplier to know immediately when certain problems occur so they can act on it leaving you to carry on with your work Contact your supplier to find out if they are offering a support service based on this feature 16710 bk ABOUTMAN FRM Page 7 Tuesday October 7 1997 ...

Page 36: ...3 8 CHAPTER 3 ABOUT NETWORK MANAGEMENT 16710 bk ABOUTMAN FRM Page 8 Tuesday October 7 1997 11 38 AM ...

Page 37: ...k Config Manager you must make a connection to the hub s console port see Chapter 3 In the descriptions of the options given in this chapter the default values are underlined Installing Quick Config Manager Installation Requirements Quick Config Manager requires an IBM compatible PC with at least a 486 33 processor Your system must also include Microsoft Windows 3 1 or Windows for Workgroups 3 11 ...

Page 38: ...ogram Manager window select the Run command from the File menu 4 In the Command Line box type drive SETUP where drive is the letter of your 3 5 disk drive and click on OK The installation program starts and checks your system configuration enter any information that s requested The installation program reports when it has completed the installation When the Quick Config Manager installation is com...

Page 39: ...This is particularly useful if you have many OfficeConnect hubs that need configuring or monitoring This feature only works if all the hubs you are going to connect to have the same baud rate or are set to Auto Config as the management station To do this 1 Make your serial connection to the new hub 2 From the File menu select Reset View Quick Config Manager closes any windows that are open in prep...

Page 40: ...4 4 CHAPTER 4 MANAGING YOUR HUB USING QUICK CONFIG MANAGER Figure 4 1 Quick Config Manager Window Map 16710 bk MANAGING FRM Page 4 Tuesday October 7 1997 11 38 AM ...

Page 41: ...Quick Config Manager Window Map 4 5 16710 bk MANAGING FRM Page 5 Tuesday October 7 1997 11 38 AM ...

Page 42: ...lows you to view the hub s information To enter the community string 1 Double click on the Quick Config Manager icon to start the application 2 From the Configure menu select Community Polling Quick Config Manager displays the Community Polling dialog box as shown in Figure 4 2 3 Enter the community string in the box 4 Click on OK Figure 4 2 Community Polling Dialog Box Changes made to this dialog...

Page 43: ...r Through VT100 management you can configure new users for the hub with different community strings see Configuring Users on page 5 17 Giving the Hub an IP Address You can configure the hub with an IP address and other useful information enabling it to communicate over become part of an IP network The hub does not need an IP address to make your Quick Config Manager work with it You need to give y...

Page 44: ...ess information for the hub but want to go through the Easy Set Up option again you can start it by clicking on the Easy Set Up button If no previous IP information has been configured for the hub or the IP address is configured as 0 0 0 0 and the Enable IP box is checked the Easy Setup option is started If you want to enter information directly into the IP Setup screen or abort the Easy Setup pro...

Page 45: ...ator possibly yourself who should be contacted in an emergency Support Contract Provides a box for you to type the ID number of any technical support contract you may have The default entries for these three fields is 3Com These defaults are just place holders and should be changed for your information as soon as possible These three fields use the same information as sysContact and sysName in the...

Page 46: ...s SubNet Mask Enter the SLIP subnet mask For a class C address 255 255 255 0 the default is suitable If you are using SLIP and have changed any of the console port settings using VT100 ensure that Flow Control is not set to XON XOFF see Connecting a Modem to the Console Port on page 5 13 If you require more information about SLIP read the Internet Activities Board document RFC 155 Router IP Addres...

Page 47: ...uses it to return to its factory default settings You may want to do this if the hub has been previously used in a different part of your network and its settings are incorrect for its new environment CAUTION Initializing the hub removes all configuration information such as security resilient links and passwords However the IP address subnet mask default router SLIP and console port information i...

Page 48: ...nnection is lost Blue Port disabled by management In the Community Polling dialog box you can specify whether the zoom view is invoked on starting Quick Config Manager and how often the zoom view is polled updated If you want to update the zoom view immediately without waiting for a poll select Update Zoom from the File menu Double clicking on the Zoom View You can configure information for the hu...

Page 49: ...hat information can be obtained from the hub by an SNMP network management station To display this information 1 Do one of the following Double click on the graphical representation of the hub but not on a port From the Configure menu select General Info 2 In the General Info dialog box select the MIB II category Quick Config Manager displays the MIB II panel as shown in Figure 4 5 Figure 4 5 MIB ...

Page 50: ...ent of a problem with the hub sysName Provides a box for you to type the name of the hub sysContact and sysName use the same information as the Device Configuration fields in the IP Setup dialog box so if you change them the fields in the IP Setup dialog box change as well For information on the IP Setup dialog box see Giving the Hub an IP Address on page 4 7 sysLocation Provides a box for you to ...

Page 51: ... unauthorized access to your network Poll Failures If your hub has been configured to monitor a device it periodically polls it for information If the device fails to respond the failure is seen by the hub Network Errors If the network has high volumes of communication or there is a high amount of errors with the communication it could be due to too many devices on your network or an incorrectly c...

Page 52: ... you select Enable and click on OK the Alert LED lights regardless of the true alert condition of the hub When you have finished your test remember to disable to Alert LED Test To do this select Disable and click on OK The Alert LED now reflects the current Alert condition of the hub UTP Port Partition Enabled Disabled Allows you to specify whether the Alert LED lights if a UTP port becomes partit...

Page 53: ...municate through your hub If this condition caused the Alert LED to light the LED goes off after you have acknowledged the alert by pressing the associated Ack button the LED stays lit if other conditions also caused it to light Authentication Failure Enabled Disabled Allows you to specify whether the Alert LED lights if an authentication failure occurs which happens if a user attempts to access i...

Page 54: ... whether the Alert LED lights if a certain level of network errors is exceeded for approximately one minute The levels are High 100 errors per 10000 frames Med 10 errors per 10000 frames Low 1 error per 10000 frames If this condition is resolved after causing the Alert LED to light the LED goes off it stays lit if other conditions also caused it to light Monitoring You can quickly and easily monit...

Page 55: ... on the port for which you want to display the Activity Errors graph 2 In the Port dialog box choose the Info category 3 In the Repeater Port Info panel select the Activity check box 4 Click on OK To display the Activity Errors graph for the hub From the View menu select Activity Errors Quick Config Manager displays the Activity Errors graph as shown in Figure 4 7 Figure 4 7 Activity Errors Graph ...

Page 56: ...usual increases in traffic rate this can indicate a potential problem Broadcast Shows the number of frames received which are addressed to all devices The number of broadcast frames is normally a small percentage of the value seen for unicast single address frames A high level of broadcast frames can adversely affect network performance Collisions Shows the number of frames for which a transmissio...

Page 57: ...9 To display the Frame Types pie chart for a port 1 Double click on the port for which you want to display the Frame Types pie chart 2 In the Port dialog box choose the Info category 3 In the Repeater Port Info panel select the Frames check box 4 Click on OK To display the Frame Types pie chart for the hub From the View menu select Frame Types Quick Config Manager displays the Frame Types pie char...

Page 58: ...hown in the Frame Types pie chart are per poll period not per second To change the poll period see Accessing the Hub on page 4 6 Network Traffic Statistics Quick Config Manager allows you to display the network traffic as a percentage of the total possible traffic for a port or the hub all ports in any one time period To display the Network Traffic graph for a port 1 Double click on the port for w...

Page 59: ...aph for a port 1 Double click on the port for which you want to display the Network Errors graph 2 In the Port dialog box choose the Info category 3 In the Repeater Port Info panel select the Errors check box 4 Click on OK To display the Network Errors graph for the hub From the View menu select Errors Quick Config Manager displays the Network Errors graph as shown in Figure 4 10 16710 bk MANAGING...

Page 60: ... with alignment errors also known as framing errors Alignment errors should be a very small percentage of the total traffic They are likely to be caused by a fault at the transmitting device Locate the segment and if there is only one transmitting device for example fiber or 10BASE T change the transceiver or adapter to see if this eliminates the problem Too Longs Shows the number of frames receiv...

Page 61: ...and change the transceiver or network adapter in the device to see if this eliminates the problem The values shown in the Network Errors graph are per poll period not per second To change the poll period see Accessing the Hub on page 4 6 Configuring a Port Quick Config Manager allows you to configure how individual ports operate enabling you to introduce some simple security to your network The hu...

Page 62: ...rt of the hub To configure a port 1 From the View menu select Zoom In to display the representation of the hub 2 Double click on the port you want to configure 3 In the Port Configuration dialog box choose the Info category Quick Config Manager displays the Repeater Port Info panel as shown in Figure 4 11 4 In the Repeater Port Info panel select either Enable or Disable for Port State If the port ...

Page 63: ...eat information to and from the network Link Traps Enabled Disabled Selects whether a trap is sent to an IP IPX based network management application if the link state changes Partition Traps Enabled Disabled Selects whether a trap is sent to an IP IPX based network management application if the partition state changes Learn Stations Enabled Disabled Selects whether the source address of received f...

Page 64: ...al devices that you want to connect to any of a number of ports you would manage at hub level to secure that connection If you simply want to disable a port see Configuring a Port on page 4 25 3Com s security is very advanced but easy to set up It works by learning in a number of ways what devices are communicating through its ports You can configure the hub to react in two ways Disconnect Unknown...

Page 65: ...t Configuration dialog box select the Security category Quick Config Manager displays the Port Security Configuration panel as shown in Figure 4 12 In the Port Security Configuration panel at port level Authorized Addresses Shows the following No of Addresses Displays the number of addresses that can be authorized for this port The list above it shows any addresses already configured for this port...

Page 66: ...s overwriting the addresses it learned previously The port never automatically switches to full security for example Auto Learn you have to do this manually While learning packets received on a port are not repeated out of the other ports Auto Learn The port learns the MAC addresses of the devices transmitting to this port and stores them permanently in its address table The maximum number of addr...

Page 67: ...bled allows broadcast frames to be transmitted to the port Allow Broadcasts and Multicasts In addition to Enabled allows broadcast and multicast frames to be transmitted to the port When you click on OK the operation may fail for one of the following reasons The operation has timed out An Invalid MAC address in other words Multicast or Broadcast address has been entered into the list of authorized...

Page 68: ... on a port to select it from the list or perform a multiple selection Selected Shows the ports selected to be configured Click on a port to select it from the list or perform a multiple selection Select Adds the selected ports in the Available list to the Selected list Remove Removes the selected ports from the Selected list to the Available list All Adds all the available ports to the Selected li...

Page 69: ...lost Figure 4 14 A Failed Link Between Two Hubs If a spare link could automatically pick up when the broken link failed the network would appear to function normally to the user At worst a few packets would be corrupted or lost This is the concept of resilience One link is on standby called the standby link waiting to take over if another link called the main link fails as shown in Figure 4 15 Thi...

Page 70: ...ink is solved the standby link stays active and the main link acts like a standby link You can use management to view the status of your links and to send traps messages to an IP IPX based network management application if anything changes Setting Up a Resilient Link Pair To set up a resilient link pair you need to manage the hub that both links in the pair are connected to You can set up to 4 res...

Page 71: ...llowing Double click on the graphical representation of the hub but not on a port From the Configure menu select General Info 3 In the General Info dialog box choose the Resilience category The Resilience Links panel is displayed 4 In the Resilience Links panel click on Create Quick Config Manager displays the Create Resilient Pair dialog box as shown in Figure 4 16 5 In the Create Resilient Pair ...

Page 72: ...link pair is operational or not When operational either the main port or the standby port can repeat traffic Main State Standby State Shows whether the main or the standby link is the active link in the resilient link pair Refresh Refreshes the information in the panel Create Displays a dialog box which you can use to create new resilient link pairs by choosing the main and standby links in the re...

Page 73: ...PX based network management application should a problem occur with a device attached to it The hub notifies the IP IPX based network management application by sending SNMP traps messages to it If you have a large network with many devices this feature allows you to distribute device monitoring among those managed devices on your network easing the load on the IP IPX based network management appli...

Page 74: ...e polled If the device is critical to the performance of your network select a frequent rate If the device is not important or on a remote network you can select a less frequent rate 6 Select whether polling of this device is to be enabled or disabled You can have up to 10 polling session entries for the hub poll 10 different devices all of which can be enabled If you do not want to poll a device ...

Page 75: ...hrough which the hub communicates with the device or any information gathered during the poll You can edit or delete a Remote Poll by selecting it from the panel and clicking on the appropriate button Additional Management If you want to perform any of the following additional management use the VT100 screens refer to Chapter 5 View the MAC address Specify IPX information Connect a modem to the co...

Page 76: ...4 40 CHAPTER 4 MANAGING YOUR HUB USING QUICK CONFIG MANAGER 16710 bk MANAGING FRM Page 40 Tuesday October 7 1997 11 38 AM ...

Page 77: ...y chosen screen In the descriptions of the options given in this chapter the default values are underlined VT100 User Interface We suggest you read through this section before you use the hub s VT100 facility for the first time Afterwards you should only need it for reference Screens Screens are divided into three main areas The header area at the top of the screen displays a title which tells you...

Page 78: ...that you cannot change OK Button Text for a button is shown in upper case letters A button performs an action A menu screen such as the Main Menu consists of a number of buttons arranged in a column Other screens have a row of buttons at the bottom To select a button move the cursor to the button and press Return The OK and CANCEL buttons appear on many screens OK updates the hub according to the ...

Page 79: ... emulation program you may find that some control keys do not operate or that they activate other functions The Windows terminal emulator uses Ctrl H as backwards deletion whereas others use it for backward cursor movement Consult the manual accompanying your Telnet or terminal emulation software before using the control keys Tab Moves the cursor from one field to the next Ctrl B Moves the cursor ...

Page 80: ...If you manage at Port level you set up parameters and examine statistics for individual ports This allows you to manage individual users or small workgroups 3Com s OfficeConnect range can be physically stacked but not logically stacked Each unit remains a separate repeater regardless of how it is connected to other OfficeConnect units Therefore managing the hub at Repeater level is the same as man...

Page 81: ...Screen Map 5 5 Figure 5 1 VT100 Screen Map 16710 bk MANVT100 FRM Page 5 Tuesday October 7 1997 11 38 AM ...

Page 82: ...he terminal By default the hub automatically configures the baud rate of its console port to operate with the connected terminal or modem provided the parity stop bits and character size are identical to the connected terminal or modem If you are using Telnet or SLIP the wake up procedure is performed automatically When the wake up procedure is successfully completed the main banner is displayed a...

Page 83: ...ion on the console port see Connecting a Modem to the Console Port on page 5 13 Autoconfigure is disabled If you are unable to obtain the banner screen it is possible that the autoconfigure option has been disabled Check the configuration of the terminal If you cannot resolve the problem refer to Problems When Using VT100 on page 6 3 for more problem solving information Logon You must enter your u...

Page 84: ...ging on as one of the default users your system manager has assigned you a user name and password The user name determines which of the three access levels monitor manager or security you have The user name and passwords are case sensitive To log on to the facility enter your user name and password in the appropriate fields and select OK The Main Menu screen is displayed User Name Default Password...

Page 85: ...he facility select the Logoff option from the bottom of the Main Menu If you accessed the facility using a Telnet session or modem connection the connection is closed automatically Auto Logout There is a built in security timeout on the VT100 interface If you do not press any keys for three minutes the management facility warns you that the inactivity timer is about to expire If you do not press a...

Page 86: ...ct field description if your network has a BOOTP server or enter it manually If you change the device IP address you must reset the hub to effect the change CAUTION To ensure that Quick Config Manager can always communicate with the hub the IP subnet 192 168 101 x is permanently assigned to the SLIP port in addition to the user configurable SLIP address Do not use this subnet for your Ethernet net...

Page 87: ...nsure that Flow Control is not set to XON XOFF For information on the console port see Connecting a Modem to the Console Port on page 5 13 BOOTP Select Enabled Disabled When enabled BOOTP allows you to download the IP address the SubNet Mask and the Router IP address from a BOOTP server on your network When operative BOOTP checks that a valid IP address is not installed before sending out requests...

Page 88: ...is highlighted to set up the parameters for traps CONSOLE PORT Press Return when the CONSOLE PORT button is highlighted to set up the console port parameters CANCEL Press Return when the CANCEL button is highlighted to abandon this screen without actioning any changes and return to the Main Menu Setting Up Traps The Trap Setup screen as shown in Figure 5 6 is used to set up traps Traps are message...

Page 89: ...itted with the specified delay between them The unit of throttle is one thousandth of a second The default value is 100 which gives a delay of one tenth of a second between each transmission If you set the throttle to 0 traps will be sent as soon as they are generated If your trap configuration results in a large number of traps being generated within a short period of time it is possible that som...

Page 90: ...led or if you change Auto Config to Enabled you need to perform the wake up procedure before communication is re established see Main Banner on page 5 6 If you are unsure of the correct settings to use refer to the manual for your terminal or modem If you change the settings by accident return them to their default settings shown on these pages as the underlined values Serial Connection Terminal M...

Page 91: ...Parity and Stop Bit are all fixed Modem Dial String Configured Hub Login Over Modem Link Configured and Hub Logout Over Modem Link Configured are fields reserved for use by suppliers setting up the special modem dial out feature see Remote Management Service on page 3 7 Configuring Local Security The Local Security screen as shown in Figure 5 8 is used for preventing various types of management co...

Page 92: ...cking yourself out from the hub completely console port access is always kept enabled for the security access level Console Port Enabled Disabled To prevent access to the management facilities through the console port disable access to the facility for each access level To allow you to configure the hub locally in the event of problems on your network we suggest that you change the default passwor...

Page 93: ...name is case sensitive Password Enter a password for this user The password can be up to 10 characters The password is case sensitive and is not displayed on the screen Access Level Monitor Secure Monitor Manager Specialist Security Enter an appropriate access level for the new user by cycling through the options using the space bar Community String By default the community string is the same as t...

Page 94: ...main differences are the password fields You must type in your current password in the Old Password field before you can change any fields To set a new password enter the password in both the New Password and Confirm Password fields If you enter different values for the New Password and Confirm Password fields an error message is displayed when the OK button is selected If Return is then pressed a...

Page 95: ...nd press Return You cannot delete the current user the user name you used to log on or any of the default users monitor manager or security Polling a Remote Device The Remote Poll screen as shown in Figure 5 12 is used to see if a remote device is responding by sending a message forcing a response from the target device This determines if there is a path or a congested path between this device and...

Page 96: ...lliseconds between the time the last frame was sent to the target device and the time a response was received by the hub If there is no response within a few seconds no reply is shown Also displayed is the number of router hops and if set the time to live for the frame The hub can be configured to automatically poll several devices at regular intervals and report back to an IP IPX based network ma...

Page 97: ... the software image stored in the management board s memory PROM Software Revision This is the version number of software stored in the Boot PROMs on the management board Downloading a Software Upgrade The Software Upgrade screen as shown in Figure 5 14 is used to download a new version of the software image to the hub This option is available only for users with security access level Figure 5 14 ...

Page 98: ...e file You may wish to download the file from another directory If so you must give the full path to the file and the filename using a maximum of 30 characters Server Address Enter the IP or IPX address of the device where the software file containing the image of the management facility can be found OK Select this button to start the software download When the download is complete the hub is rese...

Page 99: ...y perform a self test The self test only takes a few seconds during which all LEDs light Port Status LEDs light yellow Isolating a Problem A good way of isolating a problem is to see whether it occurs on a particular port only This can be done by Using a different port to see if the problem still exists Using management to view how a port has been set up In particular see if the port is Partitione...

Page 100: ...15 Check that the Alert LED Test is disabled in the Alerts dialog box If it is not select Disable and click on OK Port Status LED yellow for a 10BASE T port It is likely that there is a loop in your network which has caused this port to partition Examine your connections and remove the loop Each piece of equipment needs only one connection to your OfficeConnect hub Port Status LED not lit for a 10...

Page 101: ...100 Main Banner screen does not display Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal For console port access check you have performed the wake up procedure correctly by pressing Return Return Check the settings on your terminal or emulator The parity must be set to none the stop bit 1 and the character size 8 The management facility s autocon...

Page 102: ...ck Config Manager and initialize the device see Initializing the Hub on page 4 11 This returns all configuration information including passwords to the default values Alternatively another user with security access level can log in and initialize the device Problems When Using an IP IPX based Management Application The IP IPX based management application cannot access the device Check that The hub...

Page 103: ...s the hub has not been disabled If it is enabled check the connections and network cabling at the port Try accessing the hub through a different port If you can now access the hub a problem with the original port is indicated Re examine the connections and cabling Possibly there is a network problem preventing you from accessing the hub over the network Try accessing the hub through the console po...

Page 104: ...6 6 CHAPTER 6 PROBLEM SOLVING 16710 bk PROBSOLV FRM Page 6 Tuesday October 7 1997 11 38 AM ...

Page 105: ... system This can be achieved using the console port and an approved modem Standards Functional ISO 8802 3 IEEE 802 3 Safety UL 1950 EN 60950 CSA 22 2 950 EMC EN 55022 Class B EN 50082 1 FCC Part 15 Class B certified CSA C108 8 Class B VCCI Class 2 screened shielded cables must be used to ensure compliance with these EMC standards Environmental EN 60068 IEC 68 Refer to EMC Statements at the back of...

Page 106: ...AND CABLING Cabling 10BASE T Figure A 2 Pin Numbering For 10BASE T Straight through Figure A 3 Straight through 10BASE T Cabling Crossover Figure A 4 Crossover 10BASE T Cabling 16710 bk DIMSNSTA FRM Page 2 Tuesday October 7 1997 11 38 AM ...

Page 107: ...For Serial Connection Examples of Null Modem Cables You Can Use Figure A 6 Example Of Null Modem Cabling For 9 Pin Workstation Figure A 7 Example Of Null Modem Cabling For 25 Pin Workstation 16710 bk DIMSNSTA FRM Page 3 Tuesday October 7 1997 11 38 AM ...

Page 108: ...DS AND CABLING Modem Cable Figure A 8 Modem Cabling For 25 Pin Modem Management Settings You need to set your management equipment to Character size 8 Stop bit 1 Parity None 16710 bk DIMSNSTA FRM Page 4 Tuesday October 7 1997 11 38 AM ...

Page 109: ...uniqueness of Internet addresses they are assigned by three organizations NIC RIPE and APNIC DOM These organizations assign a globally unique network number to each network that wants to connect to the Internet They only assign the network portion of the address assigning the device numbers is your responsibility If you do not plan to connect to the Internet but need to use IP addresses on your ne...

Page 110: ...4600 1 703 742 4777 You can also send e mail to these addresses hostmaster rs internic net host domain network changes and updates action rs internic net computer operations mailserv rs internic net automatic mail service info internic net automatic mail service for general enquiries refdesk is internic net enquiries not handled by the services above Europe RIPE Attention RIPE NCC Kruislaan 409 NL...

Page 111: ... addresses are written in dotted decimal notation for example 191 0 0 72 10111111 00000000 00000000 01001000 in binary The IP address field is affected by Classes Subnets Classes Depending on the Class or type of the IP address there are many ways that the address field can be divided into a network number and a device number The number used to convey how an IP address is divided is determined by ...

Page 112: ...xx to 223 255 254 xxx where xxx represents the device portion Class D This is used as a multicast address The four highest order bits are set to 1110 Multicasting is used to send an IP datagram to all members of a host group A host group is composed of a set of devices identified by a single IP address The addresses are in the range 224 000 000 000 to 239 255 255 255 Subnets You can further divide...

Page 113: ...n addition to the user configurable SLIP address Do not use this subnet for your Ethernet network Assigning IP Addresses to a Small Contained Network If you have a small network less than 255 devices that you do not plan to connect to the Internet then here is a guide as to what you can use for the IP addresses and subnet mask Use an IP address that is in the range 192 000 001 xxx to 223 255 254 x...

Page 114: ...ct Hub 8 TPM is allocated an IPX address automatically by the local IPX router or NetWare File Server This happens approximately 60 seconds after the hub is powered up for the first time You should never need to change the allocated address 16710 bk IPADDRES FRM Page 6 Tuesday October 7 1997 11 38 AM ...

Page 115: ...online service World Wide Web Site Access the latest networking information on 3Com Corporation s World Wide Web site by entering our URL into your Internet browser http www 3Com com This service features the latest information about 3Com solutions and technologies customer service and support news about the company NetAge Magazine and more 3Com Bulletin Board Service 3ComBBS contains patches soft...

Page 116: ...Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 Brazil up to 14400 bps 55 11 547 9666 France up to 14400 bps 33 1 6986 6954 Germany up to 28800 bps 4989 62732 188 Hong Kong up to 14400 bps 852 2537 5608 Italy fee required up to 14400 bps 39 2 27300680 Japan up to 14400 bps 81 3 3345 7266 Mexico up to 28800 bps 52 5 520 7853 P R of China up to 14400 bps 86 10 684 92351 continued Sing...

Page 117: ...unt To use 3ComForum 1 Log on to CompuServe 2 Type go threecom 3 Press Return to see the 3ComForum main menu France 05 90 81 58 Germany 0130 81 80 63 Hong Kong 800 933 486 Italy 1678 99085 Malaysia 1800 801 777 Netherlands 06 0228049 New Zealand 0800 446 398 Norway 800 11062 Portugal 0505 442 607 Russia Moscow only 956 0815 Singapore 800 6161 463 Spain 900 964 445 Sweden 020 792954 U K 0800 626403...

Page 118: ...rt from 3Com If you are unable to receive support from your network supplier technical support contracts are available from 3Com Contact your local 3Com sales office to find your authorized service provider using one of these numbers Regional Sales Office Telephone Number 3Com Corporation P O Box 58145 5400 Bayfront Plaza Santa Clara California 95052 8145 U S A 800 NET 3Com or 1 408 764 5000 408 7...

Page 119: ...lephone Number 3Com Latin America U S Headquarters Northern Latin America Argentina Brazil Chile Colombia Mexico Peru Venezuela 408 326 2093 305 261 3266 Miami Florida 541 312 3266 55 11 546 0869 562 633 9242 571 629 4110 52 5 520 7841 7847 51 1 221 5399 58 2 953 8122 3Com Mediterraneo Italy Spain 39 2 253011 Milan 39 6 5279941 Rome 34 1 383 17 00 3Com Middle East 971 4 349049 3Com Nordic AB Denma...

Page 120: ...ill be returned to the sender unopened at the sender s expense To obtain an RMA number call or fax 04 22 97 Country Telephone Number Fax Number U S A and Canada 1 800 876 3266 option 2 408 764 7120 Latin America 1 408 326 2927 408 764 7120 Europe South Africa and Middle East 44 1442 438125 44 1442 435822 Outside Europe U S A and Canada 1 408 326 2926 1 408 764 7120 16710 bk PRODRANG FRM Page 6 Tue...

Page 121: ...on failure 4 17 authorized addresses 4 29 Auto Logout screen 5 9 autoconfiguration 3 4 5 6 B before you start 2 4 bitmap 4 7 4 12 BOOTP 5 11 select 5 11 broadcast frames 4 20 4 22 bulletin board service C 1 buttons 5 2 C cabling A 2 char size console port setup 5 15 checking hub connections 2 11 choice fields 5 2 classes B 3 clipping hubs together 2 6 clips 2 6 coaxial 1 2 collision 1 3 4 20 color...

Page 122: ...ostic LEDs 2 1 dialog box Alerts 4 15 Community Polling 4 6 IP Configuration 4 8 MIB II 4 13 Port Configuration 4 26 Port Security 4 29 Resilience 4 35 Security Configuration 4 32 Workgroup 4 38 dimensions A 1 disable port 4 25 Disconnect Unknown Device 4 28 displaying graphs and charts 4 18 DUD 4 28 E Edit User screen 5 18 emergency contact 4 9 enable port 4 25 entry fields 5 2 environment A 1 eq...

Page 123: ...k 5 11 network manager address 5 13 isolate 1 2 isolating a problem 6 1 K keys VT100 5 3 L L information de Sécurité Importante 9 LAN 1 2 last restart type 5 21 late events 4 25 learn stations 4 27 LEDs 2 1 links main and standby 4 33 state 4 27 traps 4 27 list box 5 2 local area network 1 2 Local Security screen 5 15 login violation 4 17 logoff 5 9 logon 5 7 Logon screen 5 7 loop 1 2 2 8 M MAC ad...

Page 124: ...4 P packet 1 3 parity console port setup 5 15 partition 1 2 4 16 state 4 27 traps 4 27 passwords changing 5 18 creating 5 17 default 5 8 pinouts A 2 polling 4 6 other devices 4 37 port 2 1 attached station 4 27 colors 4 12 configuration 4 25 configure 4 25 learn stations 4 27 link state 4 27 link traps 4 27 media type 4 27 partition state 4 27 partition traps 4 27 security 4 29 security violation ...

Page 125: ...s A 4 Setup screen 5 10 short events 4 24 siting your equipment 2 5 SLIP 1 4 4 10 5 11 address 4 10 5 11 parameters 4 10 5 11 subnet mask 4 10 5 11 SNMP 1 3 4 13 community string 5 17 enabling disabling access 5 16 software image version number 5 21 upgrade 5 21 Software Upgrade screen 5 21 speed console port setup 5 15 spot checks 2 11 stacking 2 8 clips 2 6 standards A 1 standy link 4 33 startin...

Page 126: ...ers access level 5 17 changing community string 5 18 changing password 5 18 creating 5 17 default 5 8 deleting 5 19 password 5 17 utilization 4 18 V version number flash EPROM 5 21 hardware 5 21 PROM software 5 21 very long events 4 25 View menu Activity Errors 4 19 Frame Types 4 21 Traffic 4 22 Zoom In 4 12 VT100 1 4 3 1 keys 5 3 problems 6 3 starting 5 6 VT100 screen areas 5 1 components 5 2 map...

Page 127: ...cations therefor for a period of ninety 90 days from the date of purchase from 3Com or its Authorized Reseller 3Com warrants the media containing software against failure during the warranty period 3Com s sole obligation with respect to this express warranty shall be at 3Com s discretion to refund the purchase price paid by Customer for any defective software products or to replace any defective m...

Page 128: ...3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTE...

Page 129: ...ing measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help CSA STATEMENT This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equip...

Page 130: ...16710 bk EMCSTATE FRM Page 128 Tuesday October 7 1997 11 38 AM ...

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