® Part No.
3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145 © 3Com Ireland, 1996. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Ireland.
CONTENTS ABOUT THIS GUIDE Introduction 1 How to Use This Guide 1 Conventions 2 Related Publications 3 1 GETTING STARTED About the LinkBuilder MSH 1-1 About the MSH Switch 1005 1-1 Summary of Features 1-2 Port Connections 1-3 10BASE-T Switch Ports 1-3 Internal Switch Ports 1-3 Transceiver Module Ports 1-4 The Backbone Port 1-4 Adding an Expansion Module 1-4 Switch Operation and Features 1-5 How the Switch Compares to a Bridge 1-5 Forwarding of Packets 1-5 Intelligent Flow Management 1-7 Full Duplex 1-8 Sec
Network Configuration Examples 1-11 Configuration Rules for Fast Ethernet 1-15 Configuration Rules with Full Duplex 1-15 Switch Overview — Front Panel 1-16 LEDs 1-17 Transceiver Module slot 1-18 10BASE-T Ports 1-18 Switch Overview — PCB View 1-19 Transceiver Module Connector [1] 1-19 Expansion Module Fixing Posts [2] 1-20 Links LK 1 to LK 5 [3] 1-20 Expansion Module Socket [4] 1-20 Backplane Connectors [5] 1-20 Switch Defaults 1-20 Setting Up the MSH Switch 1005 for Management 1-21 2 INSTALLATION AND INIT
Logging On 2-14 After Logging On 2-15 Switch 1005 Management Setup Logging Off 2-19 Auto Logout 2-19 Setting Up Users 2-20 Creating a New User 2-21 Deleting a User 2-22 Editing User Details 2-23 Assigning Local Security 2-24 2-17 3 SWITCH CONFIGURATION Choosing a Switch Management Level 3-1 Switch 1005 Setup 3-4 Port Setup 3-7 Specifying the Backbone Port 3-11 The Switch Database (SDB) 3-12 Configuring the Switch Database 3-14 Searching the Switch Database 3-15 By MAC Address 3-15 By Port 3-15 Adding an E
4 ADVANCED MANAGEMENT Virtual LANs (VLANs) 4-1 What are VLANs? 4-1 Benefits of VLANs 4-2 An Example 4-3 VLANs and the Switch 1005 4-4 The Default VLAN 4-4 Connecting VLANs to a Router 4-4 Connecting Common VLANs Between Switches 4-5 Using Non-routable Protocols 4-5 Using Unique MAC Addresses 4-5 VLAN Configurations 4-6 Example 1 4-6 Example 2 4-8 Example 3 4-10 Setting Up VLANs on the Switch 4-12 Assigning a Port to a VLAN 4-15 Specifying a Backbone Port 4-15 Specifying that a Backbone Port is Part of a VLT
A SCREEN ACCESS RIGHTS B TECHNICAL SPECIFICATION C TECHNICAL SUPPORT Online Technical Services C-1 3Com Bulletin Board Service C-1 Access by Modem C-1 Access by ISDN C-2 World Wide Web Site C-2 3ComForum on CompuServe C-3 3ComFacts Automated Fax Service C-3 Support from Your Network Supplier C-4 Support from 3Com C-5 Returning Products for Repair C-6 GLOSSARY INDEX LIMITED WARRANTY
ABOUT THIS GUIDE Introduction This guide describes how to install and configure the MSH Switch 1005. If the information in the release notes shipped with your product differs from the information in this guide, follow the release notes. How to Use This Guide The following table shows where to find specific information in this guide.
2 ABOUT THIS GUIDE Conventions Table 1 and Table 2 list text and icon conventions that are used throughout this guide: Table 1 Notice Icons Icon Type Description Information Note Information notes call attention to important features or instructions. Caution Cautions alert you to personal safety risk, system damage, or loss of data. Warning Warnings alert you to the risk of severe personal injury. Table 2 Text Conventions Convention Description “Enter” vs.
Related Publications 3 Related Publications This User Guide is not intended to answer all your questions concerning the MSH. While using the MSH Switch 1005, you may need to refer to the following publications: ■ LinkBuilder MSH User Guide, part number DUA1800-0AAA0x. ■ LinkBuilder MSH Management Module User Guide, part number DUA1850-0AAA0x.
4 ABOUT THIS GUIDE
1 GETTING STARTED 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 modules. Modules within the chassis connect to a number of backplanes allowing communication between the various LANs and LAN segments connected to the MSH.
1-2 CHAPTER 1: GETTING STARTED Summary of Features ■ 8 switched 10BASE-T ports ■ Slot for optional Fast Ethernet or 10BASE-T Transceiver Module ■ Switched connections to all 3 internal Ethernet backplanes ■ Internal Fast Ethernet backplane ■ Ability to add Expansion Module adding up to three further Transceiver Modules ■ Support for up to 500 end-stations, unlimited stations on backbone port ■ Forwarding modes for packets ■ Low latency in fast forward mode ■ No runts in fragment free mode ■ N
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 10Mbps bandwidth to each attached end-station. Maximum segment length is 100m (328ft) over grade 3, 4 or 5 twisted pair cable.
1-4 CHAPTER 1: GETTING STARTED Transceiver Module Ports A slot on the front of the Switch 1005 allows you to install any of the Transceiver Modules available for this product. You can find more details in “Transceiver Module slot” on page 1-18. The Backbone Port The MSH Switch 1005 requires that the port connecting it to the rest of your network is configured as a backbone port. This is the port to which all frames arriving at a switch port with an unknown destination address will be forwarded.
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 an IEEE 802.1D bridge: IEEE 802.1D Bridge Switch 1005 Address Learning All ports All ports except backbone.
1-6 CHAPTER 1: GETTING STARTED Packet Source Destination Address Action Any port EXCEPT backbone port (Multi/Broadcast packet) Not applicable Forward to all ports (including backbone port) within same VLAN as source port Backbone port (Unicast packet) Unknown Filter (discard) Backbone port (Unicast packet) Known on a port (not backbone port) Forward to specific port only Backbone port (Multi/Broadcast packet) Not applicable Forward to all ports within specific VLAN To best suit your network
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 both input and output packet buffers and while congestion is rare, IFM is designed to alleviate problems during those moments when packet buffers in the Switch 1005 are full.
1-8 CHAPTER 1: GETTING STARTED Full Duplex The MSH Switch 1005 provides full duplex support for any Fast Ethernet Transceiver Modules you may have installed. Full duplex allows frames to be transmitted and received simultaneously and, in effect, doubles the bandwidth available on the link. Full duplex also supports 100BASE-FX cable runs of up to 2km. Security The MSH Switch 1005 contains advanced security features which guard against users connecting unauthorized stations onto your network.
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 building can be configured into a common communications group.
1-10 CHAPTER 1: GETTING STARTED You can enable PACE on the whole Switch 1005 module or on an individual port. Before configuring PACE, you should refer to sections “Switch 1005 Setup” and “Port Setup” in Chapter 3.
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 connected to the Switch 1005 using a 100Mbps port. ■ If that is not possible ... ... connect the local server to a dedicated 10Mbps port.
1-12 CHAPTER 1: GETTING STARTED 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.
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-stations.
1-14 CHAPTER 1: GETTING STARTED 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 connected via a 100Mbps Fast Ethernet link.
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 (1352ft) fiber run is allowed for connecting switch to switch, or end-station to switch, using standards-compliant half-duplex 100BASE-FX.
1-16 CHAPTER 1: GETTING STARTED Switch Overview — Front Panel Figure 1-4 Switch 1005 front view DUA1840-0AAA01
Switch Overview — Front Panel 1-17 LEDs LED Color Indicates ... PWR (Power) Green The Switch is powered up and operating normally. Green flash (slow, 0.5 Hz) Power On Self Test (POST) in operation. Green flash (fast, 1Hz) Software download in progress Amber Fault occurred on this Switch Green One or more of the internal Ethernet (10Mbps) backplanes are enabled. Green flash All three internal Ethernet backplanes are disabled. Yellow There is network activity on the enabled backplane(s).
1-18 CHAPTER 1: GETTING STARTED 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-speed connection to, for example, your network infrastructure. Maximum segment length is 100m (328ft) over grade 5 twisted pair cable.
Switch Overview — PCB View 1-19 Switch Overview — PCB View Figure 1-5 Switch 1005 PCB view Transceiver Module Connector [1] 2x20 pin connector for any of the Transceiver Modules listed in “Transceiver Module slot” on page 1-18. Installation of the Transceiver Modules is described in the documentation that accompanies them.
1-20 CHAPTER 1: GETTING STARTED Expansion Module Fixing Posts [2] The two threaded posts provide fixing points for an Expansion Module should you choose to attach one to this Switch. Links LK 1 to LK 5 [3] Allow you to configure internal backplane connections for the Switch 1005. See “Setting the Links on the Switch 1005” in Chapter 2. Expansion Module Socket [4] This socket provides the connection point for an Expansion Module should you choose to fit one to this Switch.
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 setup correctly on your network, the IP address for the Switch 1005 will be detected automatically and you can start managing the Switch 1005 without any further configuration.
1-22 CHAPTER 1: GETTING STARTED 5 At the Switch 1005 Main Banner, press [Return] to display the Logon screen. Logon using the default name security, and password security. Select OK. 6 The Switch Main Menu is displayed. From this menu, select the Management Setup option. The Switch Management Setup screen is displayed.
2 INSTALLATION AND INITIAL SETUP 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 1005 operates under SELV conditions (Safety Extra Low Voltage) according to IEC 950, the conditions of which are met only if the equipment to which it is connected is also operational under SELV.
2-2 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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: ■ Setting links located on the Switch 1005. ■ Fitting a Transceiver Module if required. ■ Fitting an Expansion Module if required.
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 the case, even if the chassis is reset or powered off/on, or if the Switch 1005 module is replaced with another one.
2-4 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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 one module has multiple connections enabled on the same VLAN, a network loop can occur, severely affecting network operation. For example, consider a pair of Switch modules where all four backplane connections are enabled and in the same VLAN.
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 Module is described in the User Guide that accompanies it.
2-6 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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, part number DUA1800-0AAA0x. Installing the Switch 1005 1 If you have a Management Module installed, ensure that both the MSH chassis and the Management Module are powered on.
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 chassis and lift the bar away from the chassis. 2 Operate the module ejectors correctly, as shown in the MSH User Guide referenced above. Store the removed Switch safely to avoid damage.
2-8 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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.
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 managed MSH chassis. ■ Access the VT100 interface over a TCP/IP network using a workstation running VT100 terminal emulation and Telnet.
2-10 CHAPTER 2: INSTALLATION AND INITIAL SETUP : Table 2-2 VT100 screen components Type of information Shown on screen as... Choice Field *text* Text enclosed with markers is a list from which you can select one option only. Press [Space] to cycle through the options. Press [Down Arrow] or [Return] to move to the next field. Entry Field [text] Text enclosed in square brackets on the screen is a text entry field. An entry field allows you to enter different types of data from the keyboard.
Setting up the Switch 1005 2-11 . Table 2-3 Keyboard shortcuts Use this key sequence... To do this... [Tab] move from one field to the next, on any screen without making any changes. [Return] move to the next field on a form after you have made changes to the data in a field. [Left Arrow] move to the previous field on the screen or the next character in an editable field. [Right Arrow] move to the next field on the screen or the previous character in an editable field.
2-12 CHAPTER 2: INSTALLATION AND INITIAL SETUP Using Telnet Once you have specified the module’s IP parameters, you can use any Telnet application that emulates a VT100 terminal to communicate with it over the network. To open a Telnet session, specify the IP address of the Switch 1005. For example: telnet 191.120.131.6 For further information on using Telnet, refer to the documentation supplied with the application. Up to three active Telnet sessions can access the Switch 1005 concurrently.
Accessing the Switch 1005 VT100 Interface 2-13 Accessing the Switch 1005 VT100 Interface The following sections explain how to access the VT100 management screens for the Switch 1005. You may find it useful to refer to Figure 2-2 when locating the screens you require.
2-14 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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, you will see the 3Com LinkBuilder Main Menu. From the list of options, select SERVICE SELECTION. 3 From the list of services available for this MSH, select Switch 1005; the LinkBuilder MSH Address Table appears.
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 functions. The defaults are shown in Table 2-4 below. ■ If you have been assigned a user name, access level and password, enter those details.
2-16 CHAPTER 2: INSTALLATION AND INITIAL SETUP From here, you can select the options needed to manage the module. Access to options depends on the access level you have been assigned. Access rights to the VT100 screens for the Switch 1005 are listed in Appendix A. If you are a user with security access level, and are using the management facility for the first time, we suggest that you: ■ Assign a new password for the security access level as described in “Editing User Details” on page 2-23.
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 this screen, the changes will not take effect until you reset the Switch 1005. Refer to “Resetting the Switch 1005” in Chapter 3.
2-18 CHAPTER 2: INSTALLATION AND INITIAL SETUP Device IP Address If using IP, a unique IP address must be specified in this field. If you do not know your IP address, consult your network administrator. You can change the IP address using this field; for the change to take effect, you must reset the Switch 1005. Device SubNet Mask If using IP, type in a suitable network mask. For a class B IP address, 255.255.0.0 is suitable. For more information, see your network administrator.
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 the main menu. If you accessed the facility using a Telnet session or modem connection, the connection will be closed automatically. Auto Logout There is a built-in security timeout on the VT100 interface.
2-20 CHAPTER 2: INSTALLATION AND INITIAL SETUP If you connected to the Switch 1005 via the MSH Management Module screens, the LinkBuilder MSH Address Table screen is displayed once you have entered the correct password.
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 on the Switch 1005. ■ CREATE USER screen — In addition to the default users set up on the Switch 1005, you can add up to ten new users. ■ DELETE USERS screen — Lets you delete users from the Switch 1005.
2-22 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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 in the fields and assign an access level for the new user. 3 When the form is completed, select OK The Create User screen shows the following fields: User Name Type in the name of this new user.
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 name is generated. You can change this to any text string of 32 characters or less. The community string is only needed for SNMP access.
2-24 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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 the fields as required. 3 When you have completed the changes, select OK. The Edit User screen shows the following fields: User Name This read-only field shows the name of the user.
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 Local Security screen appears as shown in Figure 2-11. Figure 2-11 Switch Local Security screen 2 Fill in the fields as required. 3 When you have filled in the form, select OK.
2-26 CHAPTER 2: INSTALLATION AND INITIAL SETUP 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 disable all access to the management facilities if there is important or sensitive data on your network.
Setting Up Users DUA1840-0AAA01 2-27
3 SWITCH CONFIGURATION 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 Unit Resilience Summary screen. ■ Display Setup screens for the Switch 1005. From the Main Menu, select SWITCH MANAGEMENT. The Switch Management screen appears as shown in Figure 3-1.
3-2 CHAPTER 3: SWITCH CONFIGURATION 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 screen that appears is similar to that shown in Figure 3-1 and all options relate to an individual port. If you choose VLAN, the screen that appears is similar to that shown in Figure 3-3 and all options relate to VLANs.
Choosing a Switch Management Level 3-3 Port ID 1 ...
3-4 CHAPTER 3: SWITCH CONFIGURATION 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 screen shows the following: Module Type A read-only field showing the type of device. sysName This field takes its name from the MIB II System Group object. You can edit the first 30 characters of this field to make the name more meaningful.
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 latency for all frames in this mode is 64µs. Store and Forward — In this mode, received packets are buffered in their entirety prior to forwarding. This ensures that only good frames are passed to their destination.
3-6 CHAPTER 3: SWITCH CONFIGURATION Ageing Time This field allows you to specify the ageing time (hours:minutes) for all non-permanent entries in the Switch Database of the module You can set an ageing time in the range 0 minutes to 277 hours with a default of 30 minutes. If you enter 00:00, the database entries are non-ageing; non-ageing entries do not age but will be deleted from the database if the Switch 1005 is reset or a power-off/on cycle occurs.
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 shows the ID of the port you have chosen to setup. Media Type This read-only field shows the media type of the link connected to the port. Port Speed This read-only field shows the speed of the link.
3-8 CHAPTER 3: SWITCH CONFIGURATION Lost Links The number of times the link has been lost since the Switch 1005 was last reset. If this field displays a number other than 0, you should check your cables and replace any that may be damaged. If the port is directly connected to an end-station, this counter increments each time the end-station goes through a power off/on cycle and is not a result of faulty cabling.
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 port if it is connected to a single end-station, switch, bridge or router.
3-10 CHAPTER 3: SWITCH CONFIGURATION Broadcast Storm Control The Switch 1005 automatically creates an alarm on each of its ports to monitor the level of broadcast traffic on each port. The Broadcast Storm Control fields allow you to specify thresholds for the level of broadcast traffic on a port. In addition, you can specify an action to take place if the threshold is exceeded.
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. The average is based on 4 samples which are taken at 5 second intervals. ■ When the average value exceeds the rising threshold value, the rising action is triggered.
3-12 CHAPTER 3: SWITCH CONFIGURATION 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 database holds up to a maximum of 500 entries, each entry consists of the MAC address of the device and an identifier for the port on which it was received.
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 an ageing time, see see “Switch 1005 Setup” on page 3-4. ■ Permanent entries — Permanent entries are retained in the database if the Switch 1005 is reset or a power off/on cycle occurs.
3-14 CHAPTER 3: SWITCH CONFIGURATION 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 access the screen, make sure the Switch Management screen is displayed, see “Choosing a Switch Management Level” on page 3-1. From the foot of the screen select the SDB button.
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 section “The Switch Database (SDB)” for a description of permanent and ageing entries. FIND This button lets you locate an entry in the database.
3-16 CHAPTER 3: SWITCH CONFIGURATION 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 field, type in the MAC address of the device. 2 In the Port Number field, type in the port identifier for this device. 3 Select INSERT. Entries inserted this way are permanent entries.
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 on twisted pair links is continually monitored by the management software.
3-18 CHAPTER 3: SWITCH CONFIGURATION 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 shows the current resilient link configuration for the module. Figure 3-7 Module Resilience Summary screen The following read-only information is displayed: MAIN Port The ID of the port configured as the main port for this resilient link pair.
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 carrying traffic: ■ ■ ■ Main — The pair is operating in its normal state with the main port carrying traffic. Standby — The main port has failed and the standby port is carrying the traffic.
3-20 CHAPTER 3: SWITCH CONFIGURATION 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 displayed as shown in Figure 3-8. This screen allows you to setup, edit and delete resilient link pairs. Figure 3-8 Port Resilience screen The screen shows the following: Main Port ID The identifier for the main port.
Resilient Links 3-21 Media Type Twisted Pair/Fiber This read-only field shows the standby port media type. Link State Available/Not Available/Not Present This read-only field hows the connection state of the standby port in the link: ■ ■ ■ Available — The port is operating normally. Not Available — The resilient link pair is disabled. Not Present — The port is not present in the current hardware. Standby Links Available This listbox shows the ports that are available to set up as standby.
3-22 CHAPTER 3: SWITCH CONFIGURATION 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 same VLAN. 3 At the Switch Management screen, select the port to be configured as the main port in the link. Select the RESILIENCE button at the foot of the screen.
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 documentation accompanying the network management software. To access the Trap Setup screen, from the Switch 1005 Management Setup screen (described in “Setting up the Switch 1005” in Chapter 2), select the SETUP TRAPS button.
3-24 CHAPTER 3: SWITCH CONFIGURATION 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 receive traps generated by the device, you must enter the community string of the remote Network Manager into the trap table. The default community string is public.
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: Resetting the Switch 1005 in this way is similar to performing a power off/on cycle. No setup information is lost.
3-26 CHAPTER 3: SWITCH CONFIGURATION 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 not cleared. You should only initialize the Switch 1005 if: ■ The configuration of the device no longer suits your network. ■ Other efforts to solve problems have not succeeded.
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 the Switch if your management station communicates via the VLT. To avoid this: a Remove the VLT configuration from both ends of the VLT link before you initialize the Switch.
3-28 CHAPTER 3: SWITCH CONFIGURATION 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 software images. The protocol used for downloading software images is TFTP running over UDP/IP or IPX and will only work over the network, not via the serial port.
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 reset.
3-30 CHAPTER 3: SWITCH CONFIGURATION DUA1840-0AAA01
4 ADVANCED MANAGEMENT Virtual LANs (VLANs) Setting up Virtual Local Area Networks (VLANs) on the MSH Switch 1005 provides you with less time-consuming network administration and more efficient network operation. The following sections explain more about the concept of VLANs and explain how they can be implemented on the Switch 1005. What are VLANs? A VLAN is defined as a group of location- and topology- independent devices that communicate as if they are on the same physical LAN.
4-2 CHAPTER 4: ADVANCED MANAGEMENT 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 with moves and changes. If users move to a different IP subnet, the IP addresses of each workstation must be updated manually.
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 and 5 of Switch A; membership of VLAN 2 is restricted to ports 4, 5, 6, 7 and 8 of Switch B while VLAN 3 spans both Switches containing ports 6, 7, 8 of Switch A and 1, 2, 3 of Switch B.
4-4 CHAPTER 4: ADVANCED MANAGEMENT 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 Switch 1005 can support up to 16 VLANs. However, you can have more than 16 VLANs in your entire network by connecting the 16 Switch VLANs to other VLANs using a router. The Default VLAN In any network setup, VLAN 1 is the Default VLAN.
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 require one backbone port per VLAN. However, to make the Switch-to-Switch connections more cost-effective, the Switch 1005 allows you to specify that one backbone port forms part of a Virtual LAN Trunk (VLT).
4-6 CHAPTER 4: ADVANCED MANAGEMENT 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 talk to VLAN 2 using the backbone port connection between each VLAN and the router. To set up this configuration: 1 Use the VT100 screens to: a Place ports 1-6 in VLAN 1. b Place ports 7-12 in VLAN 2. 2 Connect a port in VLAN 1 to the router.
Virtual LANs (VLANs) Figure 4-2 VLAN configuration with a single Switch 1005 module DUA1840-0AAA01 4-7
4-8 CHAPTER 4: ADVANCED MANAGEMENT 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 VLAN and the router. Ports within the same VLAN which span the two Switches communicate using a VLT on the Fast Ethernet backplane. To set up this configuration: 1 Use the VT100 screens to: a Place ports 5-8 of both Switch 1005s in VLAN 1.
Virtual LANs (VLANs) 4-9 You can set up this configuration more easily using 3Com’s Transcend Enterprise Manager applications.
4-10 CHAPTER 4: ADVANCED MANAGEMENT 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 1005 connects into the basement Switch 3000 FX using a VLT. The attached router allows the two VLANs to communicate with each other. To set up this configuration: 1 Use the VT100 screens to: a Place ports 5-8 of all the Switch 1005s in VLAN 1.
Virtual LANs (VLANs) 4-11 You can set up this configuration more easily using 3Com’s Transcend Enterprise Manager applications.
4-12 CHAPTER 4: ADVANCED MANAGEMENT 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 appears. 2 In the Management Level field, choose VLAN. 3 Choose the SETUP button. The VLAN Setup screen appears as shown in Figure 4-5. Figure 4-5 VLAN Setup screen The screen shows the following: Port ID 1,2,3 ...
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: ■ ■ Addresses received on the port are not stored in the Switch Database. Frames with unknown addresses received by the Switch are forwarded to the port.
4-14 CHAPTER 4: ADVANCED MANAGEMENT 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 database.
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 VLAN which allows an SNMP Network Manager to access the management agent of the unit. If you remove all ports from VLAN 1, then an SNMP Network Manager cannot manage the Switch.
4-16 CHAPTER 4: ADVANCED MANAGEMENT DUA1840-0AAA01
5 STATUS MONITORING AND STATISTICS This chapter describes how to view the current operating status of the Switch 1005 and how to carry out a remote poll to check the response of another network device. It also describes the Statistics screens for the Switch 1005, and advises you on actions to take if you see unexpected values for the statistics. Please note however, that as all networks are different, any actions listed are only suggestions.
5-2 CHAPTER 5: STATUS MONITORING AND STATISTICS 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 displayed as shown in Figure 5-1. Figure 5-1 Switch Summary Statistics screen The screen lists values for the current counter against every port on the Switch 1005 and it is refreshed approximately every two seconds. Once values have reached approximately 4.
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 station. MULTI/BROADCAST (RX) Displays the total number of frames received by each port that are addressed to a multicast or broadcast address.
5-4 CHAPTER 5: STATUS MONITORING AND STATISTICS 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 shown in Figure 5-2. Figure 5-2 Switch Port Statistics screen As well as showing statistics for the port, this screen allows you access to traffic and error counter screens.
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 running average of the Broadcast frame bandwidth in use and is expressed as a percentage of a theoretical maximum bandwidth. A sampling period of 5 seconds is used.
5-6 CHAPTER 5: STATUS MONITORING AND STATISTICS 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 Traffic Statistics screen The screen shows the following: Port ID The ID of the port you are currently managing. Frames Received The number of valid frames received by the port, including fragments and frames with errors.
Port Traffic Statistics 5-7 Multicasts Received The number of frames successfully received that have a multicast destination address. This does not include frames directed to a broadcast address or frames received with errors. Broadcasts Received The number of frames received that have a broadcast destination address. This does not include frames with errors. Collisions An estimate of the total number of collisions that occurred when transmitting from the unit.
5-8 CHAPTER 5: STATUS MONITORING AND STATISTICS IFM Count The total number of times Intelligent Flow Management (IFM) has had to operate to minimize packet loss. Frame Size Analysis The number of frames of a specified length as a percentage of the total number of frames of between 64 and 1518 octets. This indicates the composition of frames on the network.
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 the port you are currently managing. CRC Align Errors This counter is incremented by one for each frame with an CRC error or an alignment error.
5-10 CHAPTER 5: STATUS MONITORING AND STATISTICS Short Events This counter is incremented by one for each carrier event whose duration is less than the short event maximum time. Short events are error frames smaller than the minimum size defined for 802.3 frames. They may indicate externally generated noise causing problems on the network. Check the cabling routing and re-route any cabling which may be affected by external noise sources.
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 following: System Up Time (seconds) The number of seconds this unit has been running since the last reset or power off/on cycle.
5-12 CHAPTER 5: STATUS MONITORING AND STATISTICS Hardware Version The hardware version number of the Switch 1005. You should note this number in case you need to quote it to your technical support representative. Upgradable Software Version The version number of the software image stored in Flash EPROM. This version number is automatically updated when you download new software. You should note this number in case you need to quote it to your technical support representative.
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 but are not manageable by SNMP. 1 To access the Remote Poll screen, from the Main Menu, select Remote Poll. The screen is displayed as shown in Figure 5-6.
5-14 CHAPTER 5: STATUS MONITORING AND STATISTICS DUA1840-0AAA01
6 PROBLEM SOLVING 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 located on the MSH display panel. All yellow LEDs should light continuously and all bi-color LEDs should flash their two colors alternately.
6-2 CHAPTER 6: PROBLEM SOLVING 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: LED Color Indicates Try the following actions PWR (Power) Off Power is not reaching the module ■ Check that the Power LED on the MSH chassis is not lit red. If it is, refer to your chassis user documentation.
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 Manager (refer to the user manual for the Network Manager). The Telnet workstation cannot access the device: Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal.
6-4 CHAPTER 6: PROBLEM SOLVING 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 new password. Alternatively, another user having ‘security' access level can log in and initialize the device. This will return all configuration information, including passwords, to the initial values.
Switch 1005 Operation Problems 6-5 You cannot see internal backplane connection E3 (port 27) on any screen. Backplane connection E3 (port 27) disappears from all screens if there is an expansion module fitted to your Switch 1005 and you have four 4 Port 10BASE-T Transceiver Modules installed. Port 27 will reappear and will be fully manageable if you remove one 4 Port 10BASE-T Transceiver Module.
6-6 CHAPTER 6: PROBLEM SOLVING DUA1840-0AAA01
A SCREEN ACCESS RIGHTS 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 to...
A-2 APPENDIX A: SCREEN ACCESS RIGHTS Screen Available to...
A-3 Screen Available to...
A-4 APPENDIX A: SCREEN ACCESS RIGHTS DUA1840-0AAA01
B TECHNICAL SPECIFICATION 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-condensing Standards EN60068 (IEC68) Safety Agency Certifications Electromagnetic Emissions (Agency Certification) UL 1950, EN60950, CSA 22.2 No.
B-2 APPENDIX B: TECHNICAL SPECIFICATION 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 854) Protocols Used for Administration ■ UDP (RFC 768) ■ IP (RFC 791) ■ ICMP (RFC 792) ■ TCP (RFC 793) ■ ARP (RFC 826) ■ TFTP (RFC 783) DUA1840-0AAA01
C TECHNICAL SUPPORT 3Com provides easy access to technical support information through the variety of services described in this appendix.
C-2 APPENDIX C: TECHNICAL SUPPORT Call the telephone number nearest you: Country Data Rate Telephone Number Australia up to 14400 bps (61) (2) 9955 2073 France up to 14400 bps (33) (1) 69 86 69 54 Germany up to 9600 bps (49) (89) 627 32 188 or (49) (89) 627 32 189 Hong Kong up to 14400 bps (852) 2537 5608 Italy (fee required) up to 14400 bps (39) (2) 273 00680 Japan up to 14400 bps (81) (3) 3345 7266 Singapore up to 14400 bps (65) 534 5693 Taiwan up to 14400 bps (886) (2) 377 583
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 use 3ComForum: 1 Log on to CompuServe. 2 Enter go threecom . 3 Press [Return] to see the 3ComForum main menu.
C-4 APPENDIX C: TECHNICAL SUPPORT 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 planning, installation, hardware maintenance, application training, and support services.
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.
C-6 APPENDIX C: TECHNICAL SUPPORT 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, at the sender’s expense. To obtain an RMA number, call or fax: Country Telephone Number Fax Number U.S. and Canada (800) 876 3266, option 2 (408) 764 7120 Europe 31 30 60 29900, option 5 (44) (1442) 275822 Outside Europe, U.S.
GLOSSARY 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 from the Switch Database which have timed-out and are no longer valid. backbone The part of a network used as the primary path for transporting traffic between network segments.
8 GLOSSARY 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 to a device. bridge A device that interconnects local or remote networks no matter what higher level protocols are involved. Bridges form a single logical network, centralizing network administration.
GLOSSARY 9 Fast Ethernet 100Mbps technology based on the Ethernet/CD network access method. forwarding The process of sending a frame toward its destination by an internetworking device. full duplex A system which allows frames to be transmitted and received simultaneously and, in effect, doubles the bandwidth available on a link. IFM Intelligent Flow Management. A means of holding packets back at the transmit port of the connected end-station. Prevents packet loss at a congested switch port.
10 GLOSSARY line speed See baud rate. main port The port in a resilient link that carries data traffic in normal operating conditions. MIB Management Information Base. Stores a device’s management characteristics and parameters. MIBs are used by the Simple Network Management Protocol (SNMP) to contain attributes of their managed systems. The Switch contains its own internal MIB. multicast Single packets copied to a specific subset of network addresses.
GLOSSARY 11 server farm A cluster of servers in a centralized location serving a large user population. SNMP Simple Network Management Protocol. A protocol originally designed to be used in managing TCP/IP internets. SNMP is presently implemented on a wide range of computers and networking equipment and may be used to manage many aspects of network and end-station operation.
12 GLOSSARY TFTP Trivial File Transfer Protocol. Allows you to transfer files (such as software upgrades) from a remote device using your Switch’s local management capabilities. Transcend 3Com’s network management system used to manage all of 3Com’s networking solutions. UDP User Datagram Protocol. An Internet standard protocol that allows an application program on one device to send a datagram to an application program on another device. VLAN Virtual LAN.
INDEX 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 assigning 2-21 access rights B-1 address learning 1-8 ageing entries 3-12 Auto Logout screen 2-19 B backbone port 1-4, 4-4 specifying 4-13, 4-15 backplane connections avoiding loops 2-4 enabling/disabling 2-3 back
2 CHAPTER : INDEX PACE 3-5, 3-9 ports 3-7 remote telnet 2-24 security 3-8 serial port 2-24 error analysis statistics accessing 5-5 Expansion Module 1-4 fixing posts 1-20 installing 2-5 socket 1-20 extended POST 2-17 when to disable 1-11 internal ports 1-3 IP addresses 1-21 configuring parameters 2-17 IP address assigning 1-21 device 2-18 entering 1-21 IPX addresses 1-21 configuring parameters 2-17 F K falling action 3-10 falling threshold 3-10 Fast Ethernet configuration rules 1-15 fax service.
CHAPTER : INDEX Module Resilience Summary screen 3-18 Module Setup screen 3-4 monitor username 2-15 MSH 1-1 MSH Switch 1005.
4 CHAPTER : INDEX Management Setup 2-17 map 2-13 Module Database View 3-14 Module Resilience Summary 3-18 Module Setup 3-4 Port Error Analysis 5-9 Port Resilience 3-20 Port Setup 3-7 Port Statistics 5-4 Port Traffic Statistics 5-6 Remote Poll 5-13 Reset 3-25 Software Upgrade 3-28 Status 5-11 Summary Statistics 5-2 Switch Management 3-1 Trap Setup 3-23 User Access Levels 2-20 VLAN Setup 4-12 security definition 1-8 enabling/disabling 3-8 security username 2-15 serial port enabling/disabling 2-24 servers co
CHAPTER : INDEX traps community strings 3-24 setting up 3-23 throttle 3-24 trouble-shooting 6-1 navigating screens 2-10 screen map 2-13 W World Wide Web site C-2 U upgradeable software version number 5-12 upgrading software 3-28 User Access Levels screen 2-20 users access levels 2-20, 2-24 changing names 2-23 creating 2-21 default 2-15 deleting 2-22 editing 2-23 names 2-21 setting up 2-20 V version number boot software 5-12 hardware 5-12 upgradable software 5-12 Virtual LAN Trunks.
6 CHAPTER : INDEX
LIMITED WARRANTY HARDWARE: 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller: Internetworking products Network adapters Ethernet stackable hubs and unmanaged Ethernet fixed port repeaters One year Lifetime Lifetime* (One year if not registered) *Power supply and fans in these stackable hubs and unmanaged repeaters One year Other hardware prod
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
ELECTROMAGNETIC COMPATIBILITY STATEMENTS FCC Statement This equipment has been tested with a class A computing device and has been found to comply with part 15 of FCC Rules. Operation in a residential area may cause unacceptable interference to radio and TV receptions requiring the operator to take whatever steps are necessary to correct the interference. CSA Statement This Class A digital apparatus meets all requirements of the Canadian Interference-causing Equipment Regulations.
