3Com 1005 - Manuals

1 G E T T I N G S T A R T E D About the LinkBuilder MSH The LinkBuilder MSH is an extremely versatile, chassis-based hub that allows you to connect and manage large, mixed-technology, mixed-media LANs. The basis of the MSH is the chassis into which you can install a series of network-specific module...

DUA1840-0AAA01 1 - 2 C H A P T E R 1: G E T T I N G S T A R T E D Summary of Features ■ 8 switched 10BASE-T ports ■ Slot for optional Fast Ethernet or 10BASE-T Transceiver M odule ■ Switched connections to all 3 internal Ethernet backplanes ■ Internal Fast Ethernet backplane ■ Ability to add E xpans...

DUA1840-0AAA01 About the MSH Switch 1005 1 - 3 ■ SmartAgent support ■ SNMP with IP and IPX protocols ■ RMON ■ Repeater and Bridge MIB ■ Broadcast storm control ■ Easy software upgrades ■ BOOTP ■ Local management Port Connections 10BASE-T Switch Ports Eight fixed ports each configured as MDIX provide...

DUA1840-0AAA01 1 - 4 C H A P T E R 1: G E T T I N G S T A R T E D Transceiver Module Ports A slot on the front of the Switch 1005 allows you to install any of the Transceiver M odules available for this product. You can find more details in “Transceiver Module slot” on page 1-18. The Backbone Port T...

DUA1840-0AAA01 Switch Operation and Features 1 - 5 Switch Operation and Features How the Switch Compares to a Bridge The table below shows how Switch 1005 operation compares to that of a n IEEE 802.1D bridge: In all other ways, MSH Switch 1005 and bridge operation is identical. Forwarding of Packets...

DUA1840-0AAA01 Switch Operation and Features 1 - 7 Intelligent Flow Management Intelligent Flow Management (IFM) is a congestion control mechanism built into the Switch 1005. Congestion is caused by one or more devices sending traffic to a Switch port which is already busy. The Switch 1005 contains ...

DUA1840-0AAA01 Switch Operation and Features 1 - 9 Implementing VLANs on your network has three main advantages: ■ Network administration personnel are required to make less physical intervention when a workstation has to be moved. Within the VLAN setup, a group of devices on different floors in a b...

DUA1840-0AAA01 MSH Switch 1005 on Your Network 1 - 11 MSH Switch 1005 on Your Network Server Connections When integrating the Switch 1005 into your network, the following notes on server connections will ensure that it is operating at maximum efficiency: ■ Ideally ... ... any local server should be ...

DUA1840-0AAA01 1 - 12 C H A P T E R 1: G E T T I N G S T A R T E D Figure 1-1 Workgroup Switch I Figure 1-1 shows how the Switch 1005 fits into a large corporate network with a Fast Ethernet infrastructure. A Switch is positioned on each floor and servers are centralized in the basement.

DUA1840-0AAA01 MSH Switch 1005 on Your Network 1 - 13 Figure 1-2 Workgroup Switch II Figure 1-2 shows the Switch 1005 in a second workgroup situation. This setup could be that of a small office within a large corporation, or part of a larger corporate network. Each switch port has mainly muliple end...

DUA1840-0AAA01 1 - 14 C H A P T E R 1: G E T T I N G S T A R T E D Figure 1-3 Desktop Switch Figure 1-3 shows the Switch 1005 used for a group of heavy-traffic users in a large corporate network. Here, switching is brought to the desktop with a single end-station per switch port. Local servers are c...

DUA1840-0AAA01 Configuration Rules for Fast Ethernet 1 - 15 Configuration Rules for Fast Ethernet The topology rules for Fast Ethernet (100Mbps) are slightly different to those for 10Mbps Ethernet. The key topology rules are: ■ Maximum UTP cable length is 100m (328ft) over category 5 cable. ■ A 412m...

DUA1840-0AAA01 1 - 16 C H A P T E R 1: G E T T I N G S T A R T E D Switch Overview — Front Panel Figure 1-4 Switch 1005 front view

DUA1840-0AAA01 Switch Overview — Front Panel 1 - 17 LEDs For information on using the LEDs for fault diagnosis, please see “Identifying Fault Conditions with the LEDs” in Chapter 6. LED Color Indicates ... PWR (Power) Green Green flash (slow, 0.5 Hz) Green flash (fast, 1Hz) Amber The Switch is power...

DUA1840-0AAA01 1 - 18 C H A P T E R 1: G E T T I N G S T A R T E D Transceiver Module slot Allows you to install an Transceiver Module. Transceivers available include: ■ 100BASE-TX Transceiver Module (3C18407) — This Fast Ethernet, 100Mbps, twisted pair port provides the Switch with a single, high-s...

DUA1840-0AAA01 Switch Overview — PCB View 1 - 19 Switch Overview — PCB View Figure 1-5 Switch 1005 PCB view Transceiver Module Connector [1] 2x 20 pin connector for any of the Transceiver Module s listed in “Transceiver Module slot” on page 1-18. Installation of the Transceiver Module s is described...

DUA1840-0AAA01 1 - 20 C H A P T E R 1: G E T T I N G S T A R T E D Expansion Module Fixing Posts [2] The two threaded posts provide fixing points for an E xpansion M odule should you choose to attach one to this Switch. Links LK 1 to LK 5 [3] Allow you to configure internal backplane connections for...

DUA1840-0AAA01 Setting Up the MSH Switch 1005 for Management 1 - 21 Setting Up the MSH Switch 1005 for Management This section describes how to get started if you wish to use an SNMP manager. It assumes you are already familiar with SNMP management. ■ If you are using IP and you have a BOOTP server ...

2 I N S T A L L A T I O N A N D I N I T I A L S E T U P Safety Information Before installing the MSH Switch 1005 into your MSH chassis, you should consider the following safety information: ■ Installation and removal of the Switch 1005 should be carried out by qualified personnel only. ■ The Switch ...

DUA1840-0AAA01 2-2 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Pre-installation Configuration Before installing the Switch 1005 into the chassis, ensure it is configured to suit your particular requirements. Procedures that must be carried out prior to installation include...

DUA1840-0AAA01 Pre-installation Configuration 2-3 Table 2-1 shows possible configurations for LK1 - LK5. You may have any combination of backplane connections enabled at any one time. In a managed MSH chassis, these links will be overridden by any changes made through management software. This is th...

DUA1840-0AAA01 2-4 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Advice for Setting Backplane Connections and Avoiding Loops Considerable care should be taken when setting backplane connections if there is more than one Switch 1005 installed in your MSH chassis. If more than...

DUA1840-0AAA01 Pre-installation Configuration 2-5 Fitting a Transceiver Module The MSH Switch 1005 has a slot for one Transceiver Module. You should fit the Transceiver Module before you fit the Expansion Module and before you install the Switch 1005 into the MSH chassis. Fitting the Transceiver Mod...

DUA1840-0AAA01 2-6 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Switch 1005 Installation and Removal The following steps give a brief guide to installing the Switch 1005 into the chassis and removing it. For detailed instructions, refer to the LinkBuilder MSH User Guide , p...

DUA1840-0AAA01 Switch 1005 Installation and Removal 2-7 Removing the Switch 1005 You do not need to power off the MSH chassis before removing the Switch 1005. However, you should warn any users attached to the Switch of the disruption in operation. 1 Undo the screws from the locking bar of the MSH c...

DUA1840-0AAA01 2-8 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P In a Managed System In a managed MSH chassis, operation of the Switch 1005 is the same, but the Management Module may itself override the link settings. This will occur if: ■ The Management Module has a stored ...

DUA1840-0AAA01 Setting up the Switch 1005 2-9 Setting up the Switch 1005 You can manage the Switch 1005 using any of the following methods: ■ Access the VT100 interface by connecting a VT100 terminal (or workstation with terminal emulation software) to the serial port located on the front panel of a...

DUA1840-0AAA01 2-10 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P : Table 2-2 VT100 screen components Type of information Shown on screen as... Description Choice Field * text * Text enclosed with markers is a list from which you can select one option only. Press [Space] to ...

DUA1840-0AAA01 Setting up the Switch 1005 2-11 . If you are using Telnet or a terminal emulation program you may find that some of the Control keys do not operate or that they activate other functions. Check carefully in the manual accompanying your Telnet or terminal emulation software before using...

DUA1840-0AAA01 2-14 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Logging On 1 Logon to the LinkBuilder MSH. This is described fully in the LinkBuilder MSH Management Module (3C18500) User Guide , part number DUA1850-0AAA0x. 2 When you have successfully logged on to the MSH,...

DUA1840-0AAA01 Accessing the Switch 1005 VT100 Interface 2-15 ■ If you are logging on for the first time (after installation or initialization), use a default user name and password to match your access requirements. We recommend you that you use the default user security so that you can access all ...

DUA1840-0AAA01 Accessing the Switch 1005 VT100 Interface 2-17 Switch 1005 Management Setup The Switch Management Setup screen allows you to configure IP and IPX parameters for the Switch 1005. This screen also allows you to display a screen for setting up traps. If you change the IP parameters using...

DUA1840-0AAA01 Accessing the Switch 1005 VT100 Interface 2-19 SETUP TRAPS Select this button to display the setup screen for trap parameters. Trap Setup is described in “Setting Up Traps” in Chapter 3. Logging Off If you have finished using the facility, select the Logoff option from the bottom of t...

DUA1840-0AAA01 Setting Up Users 2-21 Setting Up Users From the Main Menu, select USER ACCESS LEVELS. The User Access Levels screen appears as shown in Figure 2-7 . Figure 2-7 User Access Levels screen From this screen you can access: ■ LOCAL SECURITY screen — Lets you set up access levels for users ...

DUA1840-0AAA01 2-22 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Creating a New User These steps assume the User Access Levels screen is displayed. 1 Select the CREATE USER option. The Create User screen appears as shown in Figure 2-8 . Figure 2-8 Create User screen 2 Fill ...

DUA1840-0AAA01 Setting Up Users 2-23 ■ manager — access to all the manageable parameters of the Switch 1005, except security features ■ specialist — as manager ■ security — access to all manageable parameters of the Switch 1005 Community String By default a community string identical to the user nam...

DUA1840-0AAA01 2-24 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Editing User Details These steps assume the User Access Levels screen is displayed. 1 Select the EDIT USER option. The Edit User screen appears as shown in Figure 2-10 . Figure 2-10 Edit User screen 2 Fill in ...

DUA1840-0AAA01 Setting Up Users 2-25 Assigning Local Security The local security screen shows a matrix of options for access method (Serial Port, Remote Telnet, Community-SNMP) and access level. These steps assume the User Access Levels screen is displayed. 1 Select the LOCAL SECURITY option. The Lo...

DUA1840-0AAA01 2-26 C H A P T E R 2: I N S T A L L A T I O N A N D I N I T I A L S E T U P Community SNMP Enabled/Disabled The Switch 1005 can be managed via SNMP using a remote network manager. Community SNMP does have some simple security features, but it is an insecure protocol. You may want to d...

3 S W I T C H C O N F I G U R A T I O N Choosing a Switch Management Level The Switch Management screen lets you: ■ Choose between managing a port, the Switch module or a VLAN. ■ Display screens showing statistical information. ■ Display the Switch Database configuration screen. ■ Display the Switch...

DUA1840-0AAA01 3-2 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Management Level Module/Port/VLAN If you choose Module , the screen that appears is similar to the example shown in Figure 3-2 and all options at the foot of the screen relate to the Switch 1005. If you choose Port , the scree...

DUA1840-0AAA01 Choosing a Switch Management Level 3-3 Port ID 1 ... 28 When managing a Switch 1005 port , type the port number into this field before selecting the next screen: ■ Ports 1 to 4 represent ports on any Transceiver Module you may have installed ■ Ports 5 to 12 are the eight fixed 10BASE-...

DUA1840-0AAA01 3-4 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Switch 1005 Setup With the Switch Management screen displayed, choose to setup the module , then select the SETUP button. The Switch Module Setup screen is displayed as shown in Figure 3-4 . Figure 3-4 Module Setup screen The ...

DUA1840-0AAA01 Switch 1005 Setup 3-5 ■ Fragment Free — In this mode, a minimum of 64 bytes of the received frame is buffered prior to the frame being forwarded. This ensures that collision fragments are not propagated through the network, however, CRC errors are forwarded. The forwarding delay or la...

DUA1840-0AAA01 Port Setup 3-7 Port Setup With the Switch Management screen displayed, choose to setup the port , then select the SETUP button. The Switch Port Setup screen is displayed as shown in Figure 3-5 . Figure 3-5 Port Setup screen The screen shows the following: Port ID This read-only field ...

DUA1840-0AAA01 Port Setup 3-9 PACE Enable/Disable/Unit Default This field allows you to enable or disable PACE (Priority Access Control Enabled) on the port: ■ Enable — Enabling PACE increases network performance particularly if you are using multimedia applications. You should only enable PACE on a...

DUA1840-0AAA01 Port Setup 3-11 You should be aware of the following points when using Broadcast Storm Control: ■ The Switch takes 5-7 seconds to recognize that a broadcast storm is occurring. ■ Broadcast Storm Control calculates the average broadcast bandwidth over the previous 20 second interval. T...

DUA1840-0AAA01 3-12 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N The Switch Database (SDB) The Switch 1005 maintains a database of all addresses received on all of its local ports. It uses the information in this database to decide whether a frame should be forwarded or filtered. The datab...

DUA1840-0AAA01 The Switch Database (SDB) 3-13 ■ Non-ageing entries — If the ageing time is set to 00:00, all ageing entries in the database are defined as non-ageing entries. This means that they do not age, but they are still deleted if the Switch 1005 is reset. For more information about setting a...

DUA1840-0AAA01 3-14 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Configuring the Switch Database The Switch Module Database View screen, shown in Figure 3-6 , allows you to display and configure the contents of the Switch 1005 database. Figure 3-6 Switch Module Database View screen To acce...

DUA1840-0AAA01 The Switch Database (SDB) 3-15 A listbox containing the following three fields: Port The port ID for this entry. MAC Address The MAC address for the port currently stored in the database. Permanent Shows Yes if this entry is permanent , or No if this entry is ageing . See the previous...

DUA1840-0AAA01 3-16 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N 2 In the Port Number field, enter the port ID for which you want MAC addresses displayed. 3 Select FIND. The listbox will show entries in the database for that port only. Adding an Entry into the SDB 1 In the MAC Address fiel...

DUA1840-0AAA01 Resilient Links 3-17 Resilient Links Switch 1005 ports can be configured to provide resilient links. A resilient link consists of a main link and a standby link. Under normal network operating conditions, the main link carries your data. The fiber Receive Idle signal or the Test Pulse...

DUA1840-0AAA01 3-18 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Viewing Resilient Setup With the Switch Management screen displayed, choose to set up the module and select the RESILIENCE button. The Switch Module Resilience Summary screen is displayed as shown in Figure 3-7 . This screen ...

DUA1840-0AAA01 Resilient Links 3-19 ■ Unknown — The network configuration has changed and the resilient link pair no longer conforms to the rules. ■ Not Available — This resilient link pair is disabled. Active Port Main/Standby/Both Failed Shows which port in the resilient link pair is currently car...

DUA1840-0AAA01 3-20 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Configuring Resilient Links With the Switch Management screen displayed, choose the port that will be set up as the main port in the resilient link pair, then select the RESILIENCE button. The Port Resilience screen is displa...

DUA1840-0AAA01 3-22 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Creating a Resilient Link 1 Ensure that the port nominated as the standby port is not physically connected to the unit. 2 Ensure both ports have an identical port security mode configuration and that they are members of the s...

DUA1840-0AAA01 Setting Up Traps 3-23 Setting Up Traps Traps are messages sent across the network to an SNMP Network Manager. They alert the network administrator to faults or changes at the Switch 1005. Your Network Manager may automatically set up traps in the Switch 1005 Trap Table. Check the docu...

DUA1840-0AAA01 3-24 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Community String The community string allows a very simple method of authentication between the Switch 1005 and the remote Network Manager. The text string can be of 32 characters or less. If you want a Network Manager to rec...

DUA1840-0AAA01 Resetting the Switch 1005 3-25 Resetting the Switch 1005 If you suspect a problem with the Switch 1005, you can perform a reset. 1 From the Switch Main Menu, select the RESET option. The Reset screen appears as shown in Figure 3-10 . 2 Select OK. Figure 3-10 Reset screen CAUTION: Rese...

DUA1840-0AAA01 3-26 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Initializing the Switch 1005 This screen allows you to perform a reset as described in the previous section, and in addition, returns non-volatile data stored on the unit to its factory defaults. Note that the IP address is n...

DUA1840-0AAA01 Initializing the Switch 1005 3-27 ■ Network loops may occur if you are not careful when configuring your backplane connections. See “Advice for Setting Backplane Connections and Avoiding Loops” on page 2-4 . ■ Ports which form part of a VLT will fail and you will not be able to manage...

DUA1840-0AAA01 3-28 C H A P T E R 3: S W I T C H C O N F I G U R A T I O N Upgrading Software When 3Com issues a new version of the software image for the Switch 1005, you can obtain it from the 3Com Bulletin Board Service, see Appendix C . You use the Software Upgrade screen to download new softwar...

DUA1840-0AAA01 Upgrading Software 3-29 3 In the Server Address field, type the IP or IPX address of the host containing the software image to load. 4 Select OK. During the download, the MGMT LED flashes green (fast flash, 1Hz) and the screen is locked. When the download is complete, the module is re...

DUA1840-0AAA01 4-2 C H A P T E R 4: A D V A N C E D M A N A G E M E N T Benefits of VLANs Implementing VLANs on your network has three main advantages: ■ It eases the change and movement of devices on IP networks With traditional IP networks, network administrators spend much of their time dealing w...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-3 An Example Figure 4-1 shows a network configured with port-based VLANs, where a VLAN consists of a set of switch ports. There are three VLANs — one for each of the departments who access the network. The membership of VLAN 1 is restricted to ports 1, 2, 3, 4 a...

DUA1840-0AAA01 4-4 C H A P T E R 4: A D V A N C E D M A N A G E M E N T VLANs and the Switch 1005 The Switch 1005 supports port-based VLANs, where a VLAN consists of a set of switch ports. Each switch port can only belong to one VLAN at a time, regardless of the device to which it is attached. Each ...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-5 Connecting Common VLANs Between Switches In the Switch 1005, VLANs are typically connected to other Switch 1005 modules, SuperStack II Switch 1000 units and SuperStack II Switch 3000 units using backbone ports. Similar to the router connections, you normally r...

DUA1840-0AAA01 4-6 C H A P T E R 4: A D V A N C E D M A N A G E M E N T VLAN Configurations Example 1 The example shown in Figure 4-2 illustrates a simple VLAN configuration comprising a single Switch 1005 with a 10Base-T Transceiver Module. The ports are divided between two VLANs; VLAN 1 is able to...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-7 Figure 4-2 VLAN configuration with a single Switch 1005 module

DUA1840-0AAA01 4-8 C H A P T E R 4: A D V A N C E D M A N A G E M E N T Example 2 The example shown in Figure 4-3 illustrates two VLANs spanning two Switch 1005s, each with a Fast Ethernet Transceiver Module as port 1. VLAN 1 is able to talk to VLAN 2 using the backbone port connection between each ...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-9 You can set up this configuration more easily using 3Com’s Transcend Enterprise Manager applications. Figure 4-3 VLAN configuration with two Switch 1005s

DUA1840-0AAA01 4-10 C H A P T E R 4: A D V A N C E D M A N A G E M E N T Example 3 The example shown in Figure 4-4 illustrates two VLANs spanning three Switch 1005s (each with a 100FX Transceiver Module as port 1) and a basement SuperStack II Switch 3000 FX with a 100FX Downlink Module. Each Switch ...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-11 You can set up this configuration more easily using 3Com’s Transcend Enterprise Manager applications. Figure 4-4 VLAN configuration with a Switch 3000 FX as a basement switch

DUA1840-0AAA01 4-12 C H A P T E R 4: A D V A N C E D M A N A G E M E N T Setting Up VLANs on the Switch The VLAN Setup screen allows you to set up and manage VLANs on the Switch. To access the VLAN Setup screen: 1 From the VT100 Main Menu, select SWITCH MANAGEMENT. The Switch Management screen appea...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-13 Select Port Type Port/Backbone Port This field allows you to specify whether the port specified in the Port ID field is a backbone port. A backbone port is used to connect each VLAN to the backbone of your network, and has the following attributes: ■ Addresse...

DUA1840-0AAA01 4-14 C H A P T E R 4: A D V A N C E D M A N A G E M E N T ResBP This field displays the resilient backbone port for the VLAN, if one exists. For more information about creating resilient links, see “Resilient Links” on page 3-17 . APPLY This button applies any changes to the VLAN data...

DUA1840-0AAA01 Virtual LANs (VLANs) 4-15 Assigning a Port to a VLAN 1 In the Port ID field, type the ID of the required port. 2 In the VLAN ID field, type the ID of the required VLAN. 3 Select APPLY. CAUTION: Initially, all Switch ports belong to the Default VLAN ( VLAN 1). This VLAN is the only VLA...

DUA1840-0AAA01 5-2 C H A P T E R 5: S T A T U S M O N I T O R I N G A N D S T A T I S T I C S Summary Statistics With the Switch Management screen displayed, choose to view statistics for the Switch 1005 module , then select the STATISTICS button. A typical Switch Summary Statistics screen is displa...

DUA1840-0AAA01 Summary Statistics 5-3 FRAMES FORWARDED Displays the total number of frames that were received by each port and forwarded to other ports. FRAMES FILTERED Displays the total number of frames that were filtered because the destination station was on the same segment (port) as the source...

DUA1840-0AAA01 5-4 C H A P T E R 5: S T A T U S M O N I T O R I N G A N D S T A T I S T I C S Port Statistics With the Switch Management screen displayed, choose to view statistics for a Switch 1005 port , then select the STATISTICS button. A typical Switch Port Statistics screen is displayed as sho...

DUA1840-0AAA01 Port Statistics 5-5 Frames Forwarded This counter provides a running average of the proportion of the received frames that are forwarded and is expressed as a percentage of all received frames. A sampling period of 1 minute is used. Broadcast Frame Bandwidth This counter provides a ru...

DUA1840-0AAA01 5-6 C H A P T E R 5: S T A T U S M O N I T O R I N G A N D S T A T I S T I C S Port Traffic Statistics With the Port Statistics screen displayed, select the TRAFFIC STATISTICS button. A typical Port Traffic Statistics screen is displayed as shown in Figure 5-3 . Figure 5-3 Port Traffi...

DUA1840-0AAA01 Port Error Analysis 5-9 Port Error Analysis With the Port Statistics screen displayed, select the ERROR ANALYSIS button. A typical Port Error Analysis screen is displayed as shown in Figure 5-4 . Figure 5-4 Port Error Analysis screen The screen shows the following: Port ID The ID of t...

DUA1840-0AAA01 Status Monitoring 5-11 Status Monitoring The status screen provides read-only information about the Switch 1005. To access the screen, from the Main Menu, select the STATUS option. The Status screen is displayed as shown in Figure 5-5 . Figure 5-5 Status screen The screen shows the fo...

DUA1840-0AAA01 Remote Polling 5-13 Remote Polling The Remote Poll screen allows you to send a single frame to a remote device to see if that device is responding. This can help to locate the source of a network problem. It is also particulary helpful in locating devices that support IP, IPX and ping...

6 P R O B L E M S O L V I N G Spot Checks This chapter explains how to check for problems and solve them. It is good practice to carry out regular checks of your MSH equipment and it could allow you spot a potential problem before it occurs. Check the following: ■ LEDs — Press the Lamp Test button l...

DUA1840-0AAA01 6-2 C H A P T E R 6: P R O B L E M S O L V I N G Identifying Fault Conditions with the LEDs The following table shows how you can identify possible fault conditions that may occur during normal operation. It also describes actions that may resolve the problem: If you cannot solve the ...

DUA1840-0AAA01 VT100 Problems 6-3 VT100 Problems The SNMP Network Manager cannot access the device: Check the device's IP address, subnet mask and default router are correctly configured, and that the device has been reset. Check that the device's IP address is correctly recorded by the SNMP Network...

DUA1840-0AAA01 6-4 C H A P T E R 6: P R O B L E M S O L V I N G You forget your password and cannot log in: If you are not one of the default users (monitor, manager or security), another user having ‘security' access level can log in, delete your user name, and create a new user name for you, with ...

A S C R E E N A C C E S S R I G H T S The following table lists the rights assigned to each level of user for accessing and editing Switch 1005 screens via the VT100 interface. The access rights granted to Monitor level are all read-only. All other access rights are read-and-write. Screen Available ...

B T E C H N I C A L S P E C I F I C A T I O N Physical Dimensions Height: 283mm (11.1 inches) x Width: 25mm (1 inch) x Depth 312mm (12.3 inches) Weight: 560g (1.2lbs) Environmental Requirements Operating Temperature 0° to 50° C (32° to 122°F) Operating Humidity 10 to 95% relative humidity, non-conde...

DUA1840-0AAA01 B-2 A P P E N D I X B: T E C H N I C A L S P E C I F I C A T I O N Standards Supported SNMP ■ SNMP protocol (RFC 1157) ■ MIB-II (RFC 1213) ■ Bridge MIB (RFC 1286) ■ Repeater MIB (RFC 1516) ■ VLAN MIB (RFC 1573) ■ RMON MIB (RFC 1271) ■ BOOTP (RFC 951) Terminal Emulation ■ Telnet (RFC 8...

C T E C H N I C A L S U P P O R T 3Com provides easy access to technical support information through the variety of services described in this appendix. Online Technical Services 3Com offers worldwide product support seven days a week, 24 hours a day, through the following online systems: ■ 3Com Bul...

DUA1840-0AAA01 C-2 A P P E N D I X C: T E C H N I C A L S U P P O R T Call the telephone number nearest you: Access by ISDN ISDN users can dial-in to 3ComBBS using a digital modem for fast access up to 56 Kbps. To access 3ComBBS using ISDN, dial the following number: (408) 654 2703 World Wide Web Si...

DUA1840-0AAA01 Online Technical Services C-3 3ComForum on CompuServe 3ComForum is a CompuServe-based service containing patches , software, drivers, and technical articles about all 3Com products, as well as a messaging section for peer support. To use 3ComForum, you need a CompuServe account. To us...

DUA1840-0AAA01 C-4 A P P E N D I X C: T E C H N I C A L S U P P O R T Support from Your Network Supplier If additional assistance is required, contact your network supplier. Many suppliers are authorized 3Com service partners who are qualified to provide a variety of services, including network plan...

DUA1840-0AAA01 Support from 3Com C-5 Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com. In the U.S. and Canada, call (800) 876-3266 for customer service. If you are outside the U.S. and Canada, contact your local 3C...

DUA1840-0AAA01 C-6 A P P E N D I X C: T E C H N I C A L S U P P O R T Returning Products for Repair A product sent directly to 3Com for repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to 3Com without an RMA number will be returned to the sender unopened, a...

G L O S S A R Y 10BASE-T The IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP). 100BASE-FX 100Mbps Ethernet implementation over fiber. 100BASE-TX 100Mbps Ethernet implementation over Category 5 and Type 1 Twisted Pair cabling. ageing The automatic removal of dynamic entries fr...

DUA1840-0AAA01 8 G L O S S A R Y baud rate The switching speed of a line. Also known as line speed . BOOTP The BOOTP protocol allows you to automatically map an IP address to a given MAC address each time a device is started. In addition, the protocol can assign the subnet mask and default gateway t...

I N D E X Numerics 100BASE-FX Transceiver Module 1-18 100BASE-TX Transceiver Module 1-18 10BASE-T Transceiver Module 1-18 3Com Bulletin Board Service (3ComBBS) C-1 3Com sales offices C-5 3Com World Wide Web site C-2 3ComFacts C-3 3ComForum C-3 4 Port 10BASE-T Transceiver Module 1-18 A access levels ...