Page 1: User Guide
SuperStack User Guide ® Agent Software Version 3.1 http://www.3com.com/ Document No. DUA1694-1AAA04 Published June 1997 ® II Switch 3000 TX 8 Port...
Page 2 LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.
Page 3: Table Of Contents
Plug-in Module Slot 1-9 Ethernet Address 1-9 Unit Defaults 1-10 Managing the Switch 3000 TX 1-10 Quick Start For SNMP Users 1-11 Entering an IP Address for the Switch 1-11 NSTALLATION AND ETUP Following Safety Information 2-1 Positioning the Switch 3000 TX 2-1...
Page 4 ETTING P FOR ANAGEMENT Methods of Managing the Switch 3000 TX 3-1 Using the VT100 Management Interface 3-1 Using Telnet 3-2 Managing Over The Network 3-2 IP Addresses 3-2 Obtaining a Registered IP Address 3-3 Navigating the VT100 Screens 3-4...
Page 5 Setting Up VLANs on the Switch 5-8 Assigning a Port to a VLAN When Using Port VLAN Mode 5-9 Specifying that a Port is a VLT port 5-9 Setting Up VLANs Using AutoSelect VLAN Mode 5-10 Specifying Information About the VLAN Server 5-10...
Page 6 ECHNICAL ECHNICAL UPPORT Online Technical Services F-1 World Wide Web Site F-1 3Com Bulletin Board Service F-1 Access by Analog Modem F-1 Access by Digital Modem F-2 3ComFacts Automated Fax Service F-2 3ComForum on CompuServe Online Service F-2 Support from Your Network Supplier F-3...
Page 7: About This Guide
Release Notes. Throughout this guide, the SuperStack Switch 3000 TX 8 Port is referred to as the Switch 3000 TX, or Switch. How to Use This Guide This table shows where to find specific information in this guide.
Page 8: Conventions
Risk of personal injury, system damage, or loss of data Warning Risk of severe personal injury Related Documentation The Switch 3000 TX document set includes: SuperStack II Switch 3000 TX 8 Port Quick Reference Guide. Document Number DQA1694-1AAA0x SuperStack II Switch 3000 TX 8 Port Quick Installation Guide.
Page 9: Getting Started
3000 TX provides simple, low cost and high perfor- mance switched connections to Fast Ethernet net- works. The SuperStack II Switch 3000 TX is a revision of the LinkSwitch 3000 TP. Summary of Features The Switch 3000 TX has the following features:...
Page 10: Port Connections
As these ports are configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most 100BASE-TX ports in 3Com devices are MDIX-only. Plug-in Module A slot at the rear of the unit can take a Plug-in Module, providing an additional high-speed port if required.
Page 11: Virtual Lans (Vlans)
Virtual LANs (VLANs) The Switch 3000 TX has a Virtual LAN (VLAN) fea- ture which allows you to build your network seg- ments without being restricted by physical connections. A VLAN is defined as a group of loca- tion- and topology-independent devices that com- municate as if they are on the same physical LAN.
Page 12: Network Configuration Examples
ETTING TARTED Network Configuration Examples The following two illustrations show some exam- ples of how the Switch 3000 TX can be used on your network. Figure 1-1 The Switch 3000 TX used as a data-center switch Examples of how the Switch 3000 TX can be used...
Page 13 Network Configuration Examples Figure 1-2 Increasing port density with the Switch 3000 TX...
Page 14: Unit Overview - Front
1: G HAPTER ETTING TARTED Unit Overview — Front Figure 1-3 Switch 3000 TX front view...
Page 15: 100Base-Tx Ports
As these ports are configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 100BASE-TX ports in 3Com devices are MDIX-only. LEDs Table 1-1 describes the LED behavior on the Switch 3000 TX.
Page 16: Unit Overview - Rear
1: G HAPTER ETTING TARTED Unit Overview — Rear Figure 1-4 Switch 3000 TX rear view...
Page 17: Power Socket
Unit Overview — Rear Use this slot to install a Plug-in Module. The Module can be used to provide an additional high speed link to the rest of your network. 3Com provides a range of Plug-in Modules; contact your supplier for avail- ability.
Page 18: Unit Defaults
VT100 terminal, or a PC using ter- minal emulation software. You can connect the ter- minal directly to the Switch or via a modem. You can also access the VT100 interface remotely using Telnet running over the TCP/IP protocol.
Page 19: Quick Start For Snmp Users
Network Manager, you may need to set up “Entering an the address of the Network Manager in the Trap Table. Refer to 3Com Network Managers such as Transcend Enter- page 3-2. prise Manager for Windows may automatically con- figure the Switch 3000 TX to send traps to them.
Page 20 1-12 1: G HAPTER ETTING TARTED...
Page 21: Installation And Setup
Appendix A Positioning the Switch 3000 TX The Switch is suited for use in the office where it can be wall-mounted, mounted in a standard 19-inch equipment rack, or free standing. Alterna- tively, the unit can be rack-mounted in a wiring closet or equipment room.
Page 22: Configuration Rules For Fast Ethernet
Maximum UTP cable length is 100m (328ft) over category 5 cable. A 412m (1352ft) fiber run is allowed for connect- ing for switch to switch, or endstation to switch, using half-duplex 100BASE-FX. A total network span of 325m (1066ft) is allowed...
Page 23 Configuration Rules with Full Duplex Figure 2-1 Fast Ethernet configuration rules...
Page 24: Installing The Switch 3000 Tx
HAPTER NSTALLATION AND Installing the Switch 3000 TX Rack Mounting The Switch is 1.5U high and fits in most standard 19-inch racks. CAUTION: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the underside of the unit, if fitted.
Page 25: Wall Mounting
Remove self-adhesive pads from the underside of the unit if they have been previously fitted. Place the Switch the right way up on a hard flat sur- face, with the front facing towards you. Locate a mounting bracket over the mounting...
Page 26: Powering-Up The Switch
The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is through the power cord. The Switch enters a Power On Self Test (POST). The time taken for the test to complete is dependent on the type of POST configured (refer to Management Setup”...
Page 27: Connecting Equipment To The Console Port
Switch, you need a standard null modem cable: Connect one end of the cable to the console port on the Switch, and the other to the console port on the VT100 terminal. Ensure that your terminal is set to:...
Page 28: Connecting A Workstation Running Slip
NSTALLATION AND ETUP Connecting a Workstation Running SLIP You can communicate with the Switch via the con- sole port from a workstation running SLIP (Serial Line Internet Protocol). In this way, you can perform out-of-band management using Telnet or SNMP.
Page 29: Setting
PC using suitable terminal emulation soft- ware. The terminal can be connected directly to the Switch, or via a modem. You can also con- nect a management workstation running SLIP to the console port, which allows you to use out-of-band Telnet.
Page 30: Using Telnet
Switch, provided the MIB (Management Informa- tion Base) is installed correctly on the management workstation. Each Network Manager provides its own user inter- face to the management facilities. 3Com's Tran- scend “Switch Manage- facilities for managing the Switch. The Switch supports SNMP over both IP and IPX protocols.
Page 31: Obtaining A Registered Ip Address
If your network is internal to your organization only, you may use any arbitrary IP address. We sug- gest you use addresses in the series 191.100.X.Y, where X and Y are numbers between 1 and 254. Use 191.101.X.Y for the SLIP address. If your network has a connection to the external IP network, you will need to apply for a registered IP address.
Page 32: Navigating The Vt100 Screens
3: S HAPTER ETTING P FOR ANAGEMENT Navigating the VT100 Screens Screen Conventions To differentiate types of information, the VT100 screens use the following conventions: Type of Shown on screen information as... Choice Field text Entry Field [text] Button List Box monitor manager security...
Page 33: Keyboard Shortcuts
Keyboard Shortcuts There are several special characters or combinations of characters that allow you to make shortcuts: [Tab] allows you to move from one field to the next, on any screen without making any changes. [Return] moves you to the next field on a form after you have made changes to the data in a field.
Page 34: Setting Up The Switch For Management
Switch is detected automatically and you can start managing the Switch without any fur- ther configuration. If you are using the IPX protocol, the Switch is allocated an IPX address automatically. You can start the SNMP Network Manager and begin managing the Switch.
Page 35 The defaults are shown in Table 3-1. If you are setting up the Switch for management, we suggest that you log on first as admin. Table 3-1 Default Users...
Page 36: After Logging On
P FOR ANAGEMENT After Logging On When you have successfully logged on to the Switch, the Main Menu screen is displayed as shown Figure 3-3. From here, you can select the options needed to manage the unit. Refer to the screen...
Page 37: Switch Management Setup
Figure 3-4. If you change some of the following parameters, the Switch must be reset for the change to take effect. Reset the Switch by selecting OK and press- ing the Reset button on the rear of the unit. Refer “Unit Overview —...
Page 38 P FOR ANAGEMENT If you suspect that there is a problem with the Switch that has not been detected by the Normal tests, set this field to Extended and reset the Switch (refer to “Resetting the Switch 3000 TX” 4-26).
Page 39 Setting up the Switch for Management 3-11 CONSOLE PORT Select this button to display the setup screen for console port parameters. Console port setup is described in “Setting up the Console Port” page 4-24.
Page 40: Logging Off
3-12 3: S HAPTER ETTING P FOR ANAGEMENT Logging Off If you have finished using the VT100 management interface, select the LOGOFF option from the bottom of the main menu. If you accessed the VT100 management interface using a Telnet session or modem connection, the connection is closed automatically.
Page 41: Managing The Switch 3000 Tx
Switch. While following steps in these chap- ters, you may find the screen map below useful: Figure 4-1 Screen map 3000 TX WITCH If an ATM OC-3c Module is installed in the Switch, extra screens are available. Refer to the “SuperStack Guide” for more information. ®...
Page 42: Setting Up Users
From this screen you can access: LOCAL SECURITY screen — This allows you to set up access levels for users on the Switch. CREATE USER screen — This allows you to create up to 10 users in addition to the default users set up on the Switch.
Page 43: Creating A New User
Switch secure monitor — as monitor manager — access to all the manageable param- eters of the Switch, except security features specialist — as manager security — access to all manageable parameters of the Switch Figure 4-3.
Page 44: Deleting A User
4: M HAPTER ANAGING WITCH Deleting a User These steps assume the User Access Levels screen is displayed. Select the DELETE USERS option. The Delete Users screen is displayed as shown in Use the spacebar to highlight the user that you want to delete.
Page 45: Editing User Details
Community String This field allows you to enter a community string for the user. If you forget your password while logged out of the Switch VT100 interface, contact your local tech- nical support representative who will advise on your next course of action.
Page 46: Assigning Local Security
You may want to disable all access to the management facilities via Telnet if there is important or sensitive data on your network. Community-SNMP Enabled / Disabled The Switch can be managed via SNMP using a remote Network Manager. Community-SNMP does have some simple security features, but it is an insecure proto- col.
Page 47: Choosing A Switch Management Level
4-7, and all operations that you initialize from this screen relate to an individual port. If you choose Unit, the screen is displayed similar to and all operations relate to the Switch unit. If you choose VLAN, the screen is displayed similar to Figure 4-9, and all operations relate to VLANs.
Page 48 (port or unit). Refer to Up Resilient Links” page 4-18. You cannot set up resilient links if the Switch uses Spanning Tree (STP). Consequently, the RESILIENCE button is not displayed if STP is enabled. 3000 TX page Figure 4-9 “Virtual LANs...
Page 49: Setting Up The Switch Unit
Switch. The Implicit Class of Service feature minimizes latency through the Switch and protects the quality of multimedia traffic.
Page 50 Oversize Frames Forward / Discard This field allows you to specify whether the Switch forwards encap- sulated Token Ring frames from 3Com’s Token Ring products. Set this field to Forward if the Switch is connected to 3Com products which support Token Ring encapsulation (for example, the SuperStack II Switch 2000);...
Page 51: Setting Up The Switch Ports
Port Setup screen Lost Links This read-only field displays the number of times the link has been lost since the Switch was last reset. If the number in this field is not zero, you should check your cables and replace any that may be damaged.
Page 52 VLAN. AutoSelect — The port uses AutoSelect VLAN Mode, which means that the port is automatically placed in the required VLAN by referring to a VLAN Server database in 3Com’s Transcend Enter- prise Manager software.
Page 53 Action field, an unrecognized action has been speci- fied using a MIB browser. You cannot select this option. 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. 4-13...
Page 54 4-14 4: M 3000 TX HAPTER ANAGING WITCH Broadcast Storm Control calculates the average broadcast bandwidth over the previous 20-second interval. The average is based on four samples taken at 5-second intervals. When the average value exceeds the rising threshold value, the rising action is triggered. The action is not triggered again until the aver- age broadcast bandwidth falls below the falling threshold level.
Page 55: Setting Up The Switch Database (Sdb)
4080 entries; each entry consists of the MAC address of the device and an identifier for the port on which it was received. If you have set up traps for the Switch, notification that the database is becoming full is provided by two traps:...
Page 56: The Database View
4-12, allows you to view and configure the Switch Database. To access the Unit Database view screen, display the Switch Management screen, choose the man- agement level Unit, then select the SDB button. The Unit Database View screen shows the following: Database Entries This read-only field shows the number of entries currently in the SDB.
Page 57: Searching The Switch Database
You cannot delete an entry associated with a port that uses AutoSelect VLAN Mode. Searching the Switch Database You can search the switch database in two ways: by MAC address or port number. By MAC Address To locate the port number against which a particular...
Page 58: Setting Up Resilient Links
The Receive Idle signal of a fiber link or the Test Pulse on an Ethernet twisted pair link is continually monitored by the Switch. If a signal loss is detected, the Switch immediately enables the standby port so that it carries the data.
Page 59: Configuring Resilient Links
Configuring Resilient Links With the Switch Management screen displayed, choose the port to be the main port in the resilient link pair, then select the RESILIENCE button. The Port Resilience screen is displayed, as shown in Figure 4-14. This screen allows you to set up, edit and delete resilient link pairs.
Page 60: Creating A Resilient Link Pair
Ensure both ports have an identical port security mode configuration and that they are members of the same VLAN. 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.
Page 61: Viewing The Resilient Links Setup
2 minutes. Otherwise, switch the traffic back manually by setting the Active Port field in the Port Resilience screen (described on page Both Failed —...
Page 62 4-22 4: M 3000 TX HAPTER ANAGING WITCH Pair Enable Enabled / Disabled This field displays whether this resilient link pair is currently enabled or disabled. You enable or disable a resilient link pair using the Port Resilience screen described in “Con- figuring Resilient Links”...
Page 63: Setting Up Traps
Switch device. Your Network Manager may automatically set up traps in the Switch Trap Table. Check the documen- tation accompanying the network management software. To access the Trap Setup screen, select the SETUP TRAPS button from the Management Setup Screen (described in Chapter 3).
Page 64: Setting Up The Console Port
Connection Type Local / Remote This field allows you to select the type of console port connection. Select Remote if you want to manage the Switch via a modem; DCD Control and DSR Control are enabled. For all other cases, this field should be set to Local.
Page 65 Char Size 8 This read-only field displays the charac- ter bit (data bit) size for the Switch. You should set your terminal to the same value. Parity NONE This read-only field displays the parity setting for the Switch.
Page 66: Resetting The Switch 3000 Tx
4: M HAPTER ANAGING WITCH Resetting the Switch 3000 TX If you suspect a problem with the Switch 3000 TX, you can reset it. From the Main Menu, select the RESET option. The Reset screen is displayed, as shown in Figure 4-18.
Page 67: Initializing The Switch 3000 Tx
All ports are set to their default values, and are therefore enabled and available to all users. When initializing the Switch, take particular note of the following: Network loops occur if you have set up resilient links.
Page 68: Upgrading Software
4: M HAPTER ANAGING WITCH Upgrading Software When 3Com issues a new version of the software image for the Switch, you can obtain it from 3Com’s information delivery systems, described in “Online Technical Services” For upgrading ATM OC-3c Module software, refer to the “SuperStack II Switch ATM OC-3c Module...
Page 69: Advanced Management
DVANCED Virtual LANs (VLANs) Setting up Virtual Local Area Networks (VLANs) on the Switch 3000 TX provides you with less time-con- suming network administration and more efficient network operation. The following sections explain more about the con- cept of VLANs and explain how they can be imple- mented on the Switch 3000 TX.
Page 70: How Vlans Ease Change And Movement
VLANs — one for each of the departments that 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,...
Page 71: Vlans And The Switch 3000 Tx
VLANs and the Switch 3000 TX The Switch 3000 TX supports VLANs which consist 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.
Page 72: Using Autoselect Vlan Mode
AutoSelect VLAN Mode. In this mode, the ports are automatically placed in the required VLAN by referring to a VLAN Server database in 3Com’s Transcend Enterprise Manager v6.0 for Windows. AutoSelect VLAN Mode works as follows:...
Page 73: Using Non-Routable Protocols
VLT port, the port cannot use AutoSelect VLAN Mode. If a port has a permanent address stored against it in the Switch Database, the port cannot use AutoSelect VLAN Mode. We recommend that you connect each switch port to a single endstation.
Page 74: Vlan Configuration Example
VLAN 1. Place ports 7–12 and 19–24 of all the Switch 1000 units in VLAN 2. Connect a port on each Switch 1000 to a port in the Switch 3000 TX. Use the VT100 screens to: Specify that each Switch 1000 port connected to the Switch 3000 TX is a backbone port.
Page 75 Virtual LANs (VLANs) Figure 5-5 VLAN configuration with a Switch 3000 TX as a basement switch...
Page 76: Setting Up Vlans On The Switch
VLT — The port is a VLT port. A Virtual LAN Trunk (or VLT) is a Switch-to-Switch link which carries traffic for all the VLANs on each Switch. For more information about VLTs in general, refer to “VLANs and the Switch 3000...
Page 77: Assigning A Port To A Vlan When Using Port Vlan Mode
VLAN 15. Also, if you are using the Spanning Tree Protocol, you cannot use VLAN 16. In these cases, the relevant VLANs are used internally by the Switch and are, therefore, not available. APPLY This button applies any changes to the VLAN database.
Page 78: Setting Up Vlans Using Autoselect Vlan Mode
To set up VLANs using AutoSelect VLAN Mode, you need to: Specify information about the VLAN Server Specify that the Switch unit, or individual ports on the unit, use AutoSelect VLAN Mode Specifying Information About the VLAN Server The VLAN Server screen allows you to specify infor- mation about the VLAN Server.
Page 79: Specifying Autoselect Vlan Mode
To specify that the Switch uses AutoSelect VLAN Mode, refer to “Setting Up the Switch Unit” page 4-9. To specify that a port on the Switch uses AutoSe- lect VLAN Mode, refer to “Setting Up the Switch Ports” page 4-11.
Page 80: Spanning Tree Protocol
DVANCED ANAGEMENT Spanning Tree Protocol Using the Spanning Tree Protocol (STP) functionality of your Switch makes your network more fault toler- ant. The following sections explain more about STP and the STP features supported by the Switch. STP is not currently supported over an Asynchronous Transfer Mode (ATM) network.
Page 81 Spanning Tree Protocol 5-13 Figure 5-8 A network that creates loops Figure 5-10 Traffic flowing through Bridge B Figure 5-9 Traffic flowing through Bridges C and A...
Page 82: How Stp Works
The Root Path Cost consists of the path cost of the Root Port of the bridge, plus the path costs across all the Root Ports back to the Root Bridge. Table 5-1 shows the default path costs for the Switch 3000 TX. Table 5-1 Default path costs Port Type Duplex...
Page 83: An Example
Spanning Tree Protocol 5-15 An Example Figure 5-11 illustrates part of a network. All bridges have a path cost value assigned to each port, identi- fied by PC=xxx (where xxx is the value). Bridge A is selected by STP as the Root Bridge, because it has the lowest Bridge Identifier.
Page 84: Stp Configurations
Configuration 1 — Redundancy for Back- bone Link In this configuration, a Desktop Switch and Switch 3000 TX both have STP enabled and are connected by two Fast Ethernet links. STP discov- ers a duplicate path and disables one of the links.
Page 85: Enabling Stp On The Switch
Figure In the Spanning Tree field, specify Enable. Choose OK. You cannot enable STP if you have set up resilient links on any of the Switch ports, or if you are using VLAN 16. 5-13. Figure 5-13 Spanning Tree Protocol...
Page 86: Configuring Stp On The Switch
STP. Configuring the STP Parameters of VLANs The Switch has a completely separate STP system for each VLAN that you have specified. Each VLAN has its own Root Bridge, Root Ports, and BPDUs.
Page 87 Bridge Priority 0 ... 65535 This field allows you to specify the priority of the Switch. By changing the priority of the Switch, you can make it more or less likely to become the Root Bridge. The lower the number, the more likely it is that the bridge will be the Root Bridge.
Page 88: Configuring The Stp Parameters Of Ports
Learning — A port in this state is preparing to forward packets, but has temporarily blocked to prevent a loop. During the Learning state, the Switch learns the addresses of all error-free pack- ets. The port is included in STP calculations, and BPDUs can be transmitted, received and pro- cessed.
Page 89 Root Port. The default setting for this field is 128. Path Cost 0 ... 65535 This field allows you to spec- ify the path cost of the port. The Switch automatically assigns the default path costs shown in Table 5-1 page 5-14.
Page 90: Rmon
The following sections explain more about the RMON concept and the RMON features supported by the Switch. You can only use the RMON features of the Switch if you have an RMON management application, such as the RMON application supplied with 3Com’s Transcend Enterprise Manager.
Page 91: Hosts
Both rising and falling thresholds are supported, and thresholds can be on the absolute value of a vari- able or its delta value. In addition, alarm thresholds may be autocalibrated or set manually. Alarms are used to inform you of a network perfor- mance problem and they can trigger automated action responses through the Events group.
Page 92: Benefits Of Rmon
RMON and the Switch RMON requires one probe per LAN segment, and stand-alone RMON probes have traditionally been expensive. Therefore, 3Com’s approach has been to build an inexpensive RMON probe into the Smart- Agent of each Switch. This allows RMON to be widely deployed around the network without cost- ing more than traditional network management.
Page 93: Rmon Features Of The Switch
Table 5-2 RMON support supplied by the Switch RMON Group Support supplied by the Switch Statistics A new or initialized Switch has one Statistics ses- sion per port/VLAN. History A new or initialized Switch has three History ses- sions on each 100BASE-TX port and the Default...
Page 94: About Alarm Actions
Switch; however, the forwarding perfor- mance of the Switch is not affected. About Alarm Actions You can define up to 700 alarms for the Switch. The actions that you can define for each alarm are shown in Table...
Page 95: About Default Alarm Settings
About Default Alarm Settings A new or initialized Switch has four alarms defined for each port: Bandwidth used Broadcast bandwidth used Percentage of packets forwarded Errors per 10,000 packets The default values and actions for each of these alarms are given in Table 5-4.
Page 96 5-28 5: A HAPTER DVANCED ANAGEMENT...
Page 97: Status Monitoring And Statistics
It also describes the Statistics screens for the Switch, 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.
Page 98: Summary Statistics
Figure The Summary Statistics screen lists values for the current counter against every port on the Switch and it is refreshed approximately every 2 seconds. Once values have reached approximately 4,000,000,000 they are reset to zero.
Page 99: Port Statistics
Port Statistics With the Switch Management screen displayed, choose the management level port, then select the STATISTICS button. The Port Statistics screen is dis- played as shown in Figure 6-2. As well as showing statistics for the port, the Port Statistics screen allows you access to traffic and error counter screens.
Page 100: Port Traffic Statistics
6: S HAPTER TATUS ONITORING AND Port Traffic Statistics With the Port Statistics screen displayed, select the TRAFFIC STATISTICS button. The Port Traffic Statistics screen is displayed, as shown in The Port Traffic Statistics screen shows the follow- ing: Port ID The ID of the port you are currently manag- ing.
Page 101 Fragments The total number of packets received that were not an integral number of octets in length or that had a bad Frame Check Sequence (FCS), and were less than 64 octets in length (excluding fram- ing bits, but including FCS octets). Frames Forwarded The total number of frames which were received by the port and forwarded to their destination address.
Page 102: Port Error Analysis
TATISTICS Figure 6-4. Figure 6-4 Switch Port Error Analysis screen Late Events This counter is incremented by one each time a collision occurs after the valid packet minimum time. A late event is an out-of-window collision that may occur if your Ethernet LAN exceeds the maximum size as defined in the IEEE standard.
Page 103 Port Error Analysis Jabbers The total number of packets received that were longer than 8K octets (excluding framing bits, but including FCS octets). CLEAR SCREEN COUNTERS Select this button to set all counters shown on the screen to zero. It is useful for trend analysis if you wish to see changes in counters over a short period of time.
Page 104: Status Monitoring
System Up Time The time the unit has been run- ning since the last reset or power-off/on cycle. Number of Resets The total number of system resets since the Switch was first installed or initial- ized; either power on, manual reset or a watchdog expiry.
Page 105: Fault Log
The Fault Log displays read-only information about the Switch which is updated whenever an abnor- mal condition is detected. This information is for internal 3Com use only. You may be asked to quote this information if reporting a fault to your supplier.
Page 106: Remote Polling
When the poll is complete, the Round Trip Time field shows the interval in milliseconds between sending the frame to the target device and receiving a response at the Switch. If the target device does not respond after approximately 10 seconds, this field displays no reply.
Page 107: Safety Information
Installation and removal of the unit must be car- ried out by qualified personnel only. If installing the Switch unit in a stack with Super- Stack II Hub units, the Switch unit must be installed below the narrower Hub units.
Page 108 1:1, with the secondary connection point labelled Neutral, connected directly to Earth (Ground). U.K. only: The Switch is covered by Oftel General Approval, NS/G/12345/J/100003, for indirect connection to a public telecommunications system. This can only be achieved using the console port on the unit and an approved modem.
Page 109: Power Supply And Fuse
Important Safety Information Sockets for Redundant Power System (RPS) Only connect a 3Com Redundant Power System to this socket. For details, follow the installation instructions in the manuals accompanying the Redundant Power System.
Page 110: L'information De Sécurité Importante
Switch. L'installation et l'enlèvement de l'unité doivent être faits seulement par le personnel qualifié. Si vous entassez l'unité Switch avec les unités SuperStack II Hub, l'unité Switch doit être installée en dessous des unités Hub plus étroites.
Page 111: La Source De Courant Et Le Fusible
Assurer que l'entrée de la source d'alimentation soit débranchée avant d'ouvrir le couvercle de fusible du connecteur IEC ou d'enlever le couver- cle de l'unité. Seulement Pour La France et Le Pérou: Cette unité ne peut pas être mise en marche des sources de courant IT (Impédance à...
Page 112: Socle Pour Alimentation Multiple
AFETY NFORMATION Socle Pour Alimentation Multiple Brancher seulement une alimentation multiple de 3Com à cet socle. Suivre pour les détails les direc- tives de l'installation dans le manuel qui accompa- gne l'alimentation multiple. Les Ports RJ45 AVERTISSEMENT: Ceux-ci sont les prises de courant de données RJ45 protégées.
Page 113: Wichtige Sicherheitsinformationen
WARNUNG: Warnungen enthalten Anweisungen, die zur eigenen Sicherheit unbedingt zu beachten sind. Bitte befolgen Sie alle Anweisungen sorgfältig und genau. Bitte unbedingt vor dem Einbauen des Switch Ein- heit die folgenden Sicherheitsanweisungen durchle- sen. Ein- und Ausbau des Gerätes ist nur von Fachper- sonal vorzunehmen.
Page 114: Stromversorgung Und Sicherung
Originalsicherung ersetzen. Sicherung auswech- seln und die Klappe der Sicherungshalterung wieder schließen. Steckdose für Redundant Power System Nur ein 3Com Redundant Power System an diese Steckdose anschließen. Für weitere Angaben die genauen Einbauanweisungen im Handbuch zum Redundant Power System befolgen.
Page 115: Screen
CREEN The following table lists the rights assigned to each level of user for accessing and editing Switch screens via the VT100 interface. All access rights are read-and-write unless other- wise stated. Screen Available to... Logon Monitor Manager Security Main Menu...
Page 116 B: S PPENDIX CREEN CCESS IGHTS Screen Available to... VLAN STP Monitor read-only Manager Security VLAN Server Monitor read-only Manager Security VLAN Setup Monitor read-only Manager Security User Access Levels Monitor Manager Security Local Security Security Create User Security Delete Users Security Edit User Monitor...
Page 117: Rouble Shooting
ROUBLE The following is a list of problems you may see when managing the Switch with suggested courses of corrective action to take. If you have a problem which is not listed here and you cannot solve it, contact your local technical support representative.
Page 118: Using The Vt100 Interface
Check the device's IP address, subnet mask and default router are correctly configured, and that the device has been reset. Ensure that you enter the IP address of the Switch correctly when invoking the Telnet facility. Traps are not received by the SNMP Network...
Page 119: Using The Switch
You are using PACE equipped devices and have the Interactive Access feature of PACE enabled at both ends of the link. Interactive Access must only be enabled at one end of the Switch–device link. Dis- abling Interactive Access for a Switch port is described in 4-11.
Page 120 You may have added a group of users to one of the Switch 3000 TX ports via a repeater or switch, and not turned off Intelligent Flow Management (IFM). Turn off IFM on any port that is connected to multi- ple devices.
Page 121 Switch 3000 TX (Switch B). You have configured more than one VLAN on both Switch units, and there is a parallel STP path for each VLAN between the Switch units. When Switch B transmits BPDUs across a VLAN...
Page 122 C: T PPENDIX ROUBLE SHOOTING...
Page 123: Null Modem Cable
OUTS Null Modem Cable PC-AT Serial Cable 9-pin to RS-232 25-pin 9-pin to 9-pin...
Page 124: Modem Cable
D: P PPENDIX OUTS Modem Cable RJ45 Pin Assignments 9-pin to RS-232 25-pin...
Page 125 WITCH Physical Dimensions Height: 76mm (3.0in) x Width: 483mm (19.0in) x Depth: 300mm (12.0in) Weight: 4.4kg (9.7lbs) Environmental Requirements Operating Temperature 0–50°C (32–122°F) Storage Temperature -10–70 °C (14–158°F) Operating Humidity 10–95% relative humidity, non-condensing Standards EN60068 (IEC68) Safety Agency Certifications UL 1950, EN60950, CSA 22.2 No.
Page 126: E Switch 3000 Tx Technical Specifications
E: S 3000 TX T PPENDIX WITCH ECHNICAL Standards Supported SNMP SNMP protocol (RFC 1157) MIB-II (RFC 1213) Bridge MIB (RFC 1493) Repeater MIB (RFC 1516) VLAN MIB (RFC 1573) RMON MIB (RFC 1271 and RFC 1757) Terminal Emulation Telnet (RFC 854) PECIFICATIONS Protocols Used for Administration UDP (RFC 768)
Page 127: Echnical Upport
3Com Corporation’s latest news releases, NetAge Magazine, technical documentation, and more. 3ComBBS contains patches, software, and drivers for all 3Com products, as well as technical articles. This service is available via modem or ISDN 24 hours a day, 7 days a week.
Page 128: Access By Digital Modem
Germany Italy 3ComForum on CompuServe Online Service 3ComForum contains 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: Log on to your CompuServe account.
Page 129: Support From Your Network Supplier
Details about recent configuration changes, if applicable If you are unable to contact your network supplier, see the following section on how to contact 3Com. Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com.
Page 130: Returning Products For Repair
44 161 8737717 (Manchester) 44 1628 897000 (Marlow) Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain a Return Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’s expense.
Page 131: Glossary
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. Asynchronous Transfer Mode. A connection ori- ented transmission protocol based on fixed length cells (packets).
Page 132 The port on the Switch accepting a terminal or modem connector. It changes the parallel arrange- ment of data within computers to the serial form used on data transmission links. This port is most often used for dedicated local management.
Page 133 These addresses are specified in the destination-address field of the packet. PACE Priority Access Control Enabled. 3Com’s innovative technology which works in conjunction with a switch to control the latency and jitter associated with the transmission of multimedia traffic over Ethernet and Fast Ethernet.
Page 134 A device which filters, forwards and floods frames based on the frame’s destination address. The switch learns the addresses associated with each switch port and builds tables based on this informa- tion to be used for the switching decision. TCP/IP...
Page 135 Switch unit’s local management capabilities. ® Transcend 3Com’s umbrella management system used to manage all of 3Com’s networking solutions. User Datagram protocol. An Internet standard proto- col that allows an application program on one device to send a datagram to an application pro- gram on another device.
Page 136 LOSSARY...
Page 137 NDEX Numerics 100BASE-TX port 1-2, 1-8 3Com Bulletin Board Service (3ComBBS) F-1 3Com sales offices F-3 3Com URL F-1 3ComFacts F-2 3ComForum F-2 Access Level field 4-3 access rights B-1 Active Port field 4-20, 4-21 ageing entries 4-15 ageing time, specifying 4-10...
Page 138 NDEX Data Link Protocol field 3-10 Database Entries field 4-16 database. See Switch Database DCD Control field 4-24 default passwords 3-7 router 3-10 settings 1-10 users 3-7 Default RMON Host/Matrix field 4-10 Default Router field 3-10 Default VLAN 5-3 Delete Users screen 4-4...
Page 139 Hosts Top N (RMON group) 5-23, 5-25 IFM. See Intelligent Flow Management Implicit Class of Service 4-9 Initialization screen 4-27 initializing the Switch 4-27 installing the Switch 2-4 Intelligent Flow Management 1-2 Intelligent Flow Management field 4-11 Interactive Access 4-9...
Page 140 1-9 Reset Count field 6-9 Reset screen 4-26 resets number of 6-8 time since last 6-8 type 6-8 resetting the Switch 4-26 resilient link pair 4-18 resilient links configuring 4-19 creating 4-20 deleting 4-20 rules 4-18 viewing 4-21...
Page 141 Switch Management screen 4-7 sysName field 4-9 system specifications E-1 System Up Time field 6-8 Target Address field 6-10 technical support F-1 3Com URL F-1 Bulletin Board Service F-1 NDEX fax service F-2 network suppliers F-3 product repair F-4 using CompuServe F-2...
Page 142 NDEX version number boot software 6-8 hardware 6-8 upgradable software 6-8 Virtual LAN Trunks. See VLTs Virtual LANs. See VLANs VLAN Configuration Mode field 4-10, 4-12 VLAN ID field 5-9, 5-18 VLAN Membership field 5-8 VLAN Server 5-4 VLAN Server Community String field 5-10 VLAN Server IP Address field 5-10 VLAN Server screen 5-10 VLAN Setup screen 5-8...
Page 143 If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at its option and expense, repair the defective product or part, deliver to Customer an equivalent product or part to replace the defective item, or refund to Customer the purchase price paid for the defective product.
Page 144 LECTRO AGNETIC OMPATIBILITY FCC S TATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

3Com SuperStack II 3000 TX User Manual

About this Guide

Getting Started

Installation and Setup

Setting

Managing the Switch 3000 Tx

Advanced Management

Status Monitoring and Statistics

Safety Information

Screen

Creen Ccess Ights

Rouble Shooting

500 D Pin-Outs

E Switch 3000 Tx Technical Specifications

Echnical Upport

Glossary

Quick Links

User Guide

Need help?

Questions and answers

Related Manuals for 3Com SuperStack II 3000 TX

Summary of Contents for 3Com SuperStack II 3000 TX

Table of Contents