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3Com 1000 Switch User Manual

1. Backbone link to corporate LAN via Transceiver Module Figure 1 2 The Switch 1000 in a workgroup Desktop Switching This example shows Switch 1000 used for a group of heavy traffic users in a large corporate network Here switching is brought to the desktop with a single endstation per switch port A local server is connected using the 100Mbps Fast Ethernet link Switch 1000 as a 10 100Mbps switch 100Mbps Backbone link to corporate LAN Figure 1 3 The Switch 1000 as a desktop switch Switch 1000 on Your Network 1 10 CHAPTER 1 GETTING STARTED Unit Overview Front feom Module F1OOBASE TX 1x 6x iiis ali ali aiia dli dii a won 1 ad a ee de plis se x 14x SuperStack Il Switch 1000 12x 10BASE T ports Port status LEDs Fast Ethernet port amp status LEDs Plug in Module Unit status status LED LEDs port 13 only Status Module 100BASE TX conf 1x amp 7x 12x es of TTT TTT PT TT TERE ve 123456785901 ae ee eee Ml cx x 26x SuperStack Il Switch 1000 24 x 10BASE T ports Port status LEDs
2. Deleting a User SuperStack II Switch Delete Users These steps assume the User Access Levels screen is User List displayed monitor manager 1 Select the DELETE USERS option The Delete Users security screen is displayed as shown in Figure 4 4 aidan 2 Use the spacebar to highlight the user that you want to delete Note that you cannot delete default users or the current user that is yourself 3 Select DELETE USERS DELETE USERS Figure 4 4 Delete Users screen Editing User Details 4 5 Editing User Details SuperStack II Switch Edit User These steps assume the User Access Levels screen is a an 1 displayed New Password Confirn Password 1 Select the EDIT USER option The Edit User screen is BOMMNLENSSEH NGE Leecur sty 1 displayed as shown in Figure 4 5 2 Fill in the fields as required 3 When you have completed the changes select OK ok The Edit User screen shows the following fields User Name This read only field shows the name of the user This field cannot be changed if you need to change the user name you must delete this user and create a new one Figure 4 5 Edit User screen Old Password To change the user s password enter the current password in this field New Password This field allows you to enter a new password for the user Confirm Password This field allows you to re enter the new password Community String This fiel
3. Figure 6 5 Status screen Boot Software Version This is the version number of the Boot software stored on the Switch 1000 FAULT LOG Select this button to display the Switch Fault Log described the next section Fault Log 6 9 Fault Log SuperStack II Switch Fault Log The Fault Log displays read only information about Reset fount Tine Seconds anes Fault Number the Switch which is updated whenever an abnor EEE 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 This information is for internal 3Com use only You may be asked to quote With the Status screen displayed select the FAULT the Area and Fault Number if reporting a problem to your supplier LOG button The Fault Log screen is displayed as CANCEL shown in Figure 6 6 The Fault Log screen shows the following Figure 6 0 Fault Tag screen Reset Count The number of resets recorded at the time of the fault Time seconds The time elapsed since the last reset when the fault occurred Area This information may be used for fault diagno sis by your technical support representative Fault Number The hexadecimal number in this field indicates the type of fault You should note this number and contact your technical support repre sentative for advice 6 10 CHAPTER 6 STATUS MONITORING AND STATISTICS Remote Pol
4. Check that the port through which you are trying to access the device is in VLAN 1 the Default VLAN Refer to Setting Up VLANs on the Switch on page 5 8 Try accessing the device through a different port If you can now access the device a problem with the original port is indicated Re examine the connec tions and cabling There may be a network problem preventing you accessing the device over the network Try access ing the device through the console port 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 pass word Alternatively another user having security access level can log in and initialize the device This will return all configuration information including pass words to the initial values In the case where no one knows a password for a security level user contact your supplier Using the Switch C 3 Using the Switch You see network problems and the Packet LED is on continuously with constant collisions viewed using the Port Traffic Statistics screen refer to Port Traffic Statistics on page 6 4 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 Swit
5. Screen This typeface represents information as it displays appears on the screen The words When you see the word enter in this guide enter you must type something and then press the and type Return or Enter key Do not press the Return or Enter key when an instruction simply says type Key names Key names appear in text in one of two ways m Referred to by their labels such as the Return key or the Escape key a Written with brackets such as Return or Esc If you must press two or more keys simulta neously the key names are linked with a plus sign Example Press Ctrl Alt Del Menu commands and buttons Menu commands or button names appear in italics Example From the Help menu select Contents Words in italicized type Italics emphasize a point or denote new terms at the place where they are defined in the text Words in bold face type Bold text denotes key features Table 2 Notice Icons Icon Notice Type Alerts you to Information Important features or instructions note T Caution h Warning Risk of personal injury system damage or loss of data Risk of severe personal injury Related Documentation The Switch 1000 document set includes m SuperStack Il Switch 1000 Quick Reference Guide Document Number DQA1690 OAAAOx m SuperStack Il Switch 1000 Quick Installation Guide Document Number DIA1690 OAAAOx m SuperS
6. Hold Time This read only field shows the shortest time interval in seconds allowed between the transmission of BPDUs Time Since Topology Change This read only field shows the time interval since the last topology change was detected 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 The default setting for this field is 65535 Do not change the priority of the Switch unless absolutely necessary Bridge Max Age 6 40 This field allows you to specify the time in seconds that the Switch waits before trying to re configure the network when it is the Root Bridge If the Switch has not received a BPDU within the time specified in this field it will try to re configure the STP topology The default set ting for this field is 20 seconds Spanning Tree Protocol The time must be greater than or equal to 2 x Hello Time 1 and less than or equal to 2 x Forward Delay 1 Bridge Hello Time 1 10 This field allows you to specify the time delay in seconds between the transmission of BPDUs from the Switch when it is the Root Bridge The default setting for this field is 2 seconds Bridge Forward Delay 4 30 This field allows you to specify the time in seconds that the ports on the Switch
7. 08004e050e31 2 string for the VLAN Server PL g 77 LT m You cannot use VLAN 15 c I MAC Address m If a port has been configured as a backbone 08004e050e31 VLAN Server port or as a VLT port the port cannot use AutoSelect VLAN Mode m If a port has a permanent address stored against it in the Switch Database th t t 3 Having obtained the VLAN membership for the end un nn AutoSelect VLAN Mode station the Switch places the relevant port in the specified VLAN m We recommend that you connect each switch port to a single endstation If you want to con nect a port to multiple endstations specify that the port uses Port VLAN Mode Figure 5 3 Switch interrogates the VLAN Server For information about how to set up VLANs using AutoSelect VLAN Mode refer to Chapter 5 on page 5 11 For more information about the VLAN Server data base refer to the documentation supplied with 3Com s Transcend Enterprise Manager Using Non routable Protocols If you are running non routable protocols on your network for example DEC LAT or NET BIOS devices within one VLAN are not able to communi cate with devices in a different VLAN Using Unique MAC Addresses If you connect a server with multiple network adapt ers to the Switch we recommend that you config ure each network adapter with a unique MAC address Extending VLANs into an ATM Network If the Switch has an ATM OC 3c Module installed you can ext
8. 191 128 40 120 The IP address can be split into two parts m The first part 191 128 in the example identifies the network on which the device resides m The second part 40 120 in the example identi fies the device within the network 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 This system ensures that every IP address used is unique if you do not have a registered IP address you may be using an identical address to someone else and your network will not operate correctly Obtaining a Registered IP Address InterNIC Registration Services is the organization responsible for supplying registered IP addresses The following contact information is correct at the time of publication Network Solutions Attn InterNIC Registration Service 505 Huntmar Park Drive Herndon VA 20170 U S A Telephone 1 703 742 4777 If you have access to the Internet you can find fur ther information about InterNIC by entering the fol lowing URL into your web browser http www internic net Managing Over The Network 3 4 CHAPTER 3 SETTING UP FOR MANAGEMENT Navigating the VT100 Screens Screen Conventions To differ
9. Bridging Mode Forward To Backbone SDB Ageing Time HH MM 9 36 Spanning Tree Disable Duplex Mode Half Duplex Backbone Port 25 Default RMON Host Hatrix Disable Plug in Module Type 188BASE FX Transceiver Module Type Not Fitted Power Supply Internal ok Figure 5 15 Unit Setup screen CHAPTER 5 ADVANCED MANAGEMENT Configuring STP on the Switch A CAUTION You should not configure any STP parameters unless you have considerable knowl edge and experience with 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 The VLAN STP screen allows you to set up and manage an STP system for each VLAN on the Switch To access the VLAN STP screen From the Main Menu select SWITCH MANAGE MENT The Switch Management screen is displayed In the Management Level field choose VLAN Choose the STP button The VLAN STP screen is dis played as shown in Figure 5 16 The VLAN STP screen shows the following VLAN ID 1 2 3 15 This field allows you to specify the VLAN to be configured If you are using STR you cannot use VLAN 16 Also if you are using AutoSelect VLAN Mode you cannot use VLAN 15 In these cases the relevant VLANS are used internally by the Switch and are therefore not avallable Topology Changes This read only field shows the number of network
10. CSMA CD Channel access method used by Ethernet and IEEE 802 3 standards in which devices transmit only after finding the data channel clear for some period of time When two devices transmit simultaneously a collision occurs and the colliding devices delay their retransmissions for a random amount of time data center switching The point of aggregation within a corporate net work where a switch provides high performance access to server farms a high speed backbone con nection and a control point for network manage ment and security Ethernet A LAN specification developed jointly by Xerox Intel and Digital Equipment Corporation Ethernet networks operate at 10Mbps using CSMA CD to run over cabling Fast Ethernet 100Mbps technology based on the Ethernet CD net work access method forwarding The process of sending a frame toward its destina tion by an internetworking device full duplex A system which allows frames to be transmitted and received simultaneously and in effect doubles the potential throughput of a link IFM Intelligent Flow Management A means of holding packets back at the transmit port of the connected endstation Prevents packet loss at a congested switch port Intelligent Switching Mode A packet forwarding mode where the Switch moni tors the amount of error traffic on the network and changes the method of packet forwarding accord ingly IPX Internetwork Packet Exchange
11. Power Supply Internal External This read only field displays External if the Switch is receiving power from a Redundant Power System In all other cases this field displays Internal 4 12 CHAPTER 4 MANAGING THE SWITCH 1000 Setting Up the Switch Ports With the Switch Management screen displayed choose the management level Port Choose the appropriate port then select the SETUP button The Port Setup screen is displayed as shown in Figure 4 11 gt If the port is an ATM OC 3c Module port the ATM Port Setup screen is displayed For more informa tion refer to the SuperStack II Switch ATM OC 3c Module User Guide The screen shows the following Port ID This read only field shows the ID of the port you have chosen to set up Media Type This read only field shows the media type of the link connected to this port Port Speed This read only field shows the speed and duplex mode of the link HD indicates half duplex FD indicates full duplex Port State Enable Disable This field allows you to enable or disable the port To prevent unauthorized access we recommend that you disable any unused ports Link State Present Not Available This read only field shows the state of the link m Present The port is operating normally m Not Available The link has been lost SuperStack II Switch Port Setup Port ID 1 Media Type 18BASE T Port Speed 16Hbps HD Port State Enable Link State Not
12. i ng SuperStack II Switch Remote Poll The Remote Poll screen allows you to send a single frame to a remote device to see if that device is Target Address E responding This can help to locate the source of a Round Trip Time no reply network problem It is also particularly helpful in locating devices that support IP IPX and ping but S a DE Uevere are not manageable by SNMP IPX address Format AABBCCDD AABBCCDDEEFF To poll a device POLL 1 From the Main Menu select Remote Poll The Remote Poll screen is displayed as shown in Figure 6 7 Figure 6 7 Remote Poll screen 2 In the Target Address field enter the IP or IPX address of the device you want to poll 3 Select the POLL button at the foot of the screen 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 SAFETY INFORMATION You must read the following safety information before carrying out any installation or removal of components or any maintenance procedures on the Switch 1000 Important Safety Information WARNING Warnings contain directions that you must follow for your personal safety Follow all instructions carefully Please read the following safety information thor oughly before installing the Swit
13. 50 No action Enabled m High threshold 85 No action Low threshold 50 No action Managing the Switch 1000 The menu driven interface built into the Switch 1000 is known as the VT100 interface You can access it using a VT100 terminal or a PC using ter minal emulation software You can connect the ter minal directly to the Switch or through a modem You can also access the VT100 interface remotely using Telnet running over the TCP IP protocol Remote management is also possible using a Net work Manager from 3Com s Transcend product range The management protocol is SNMP Simple Network Management Protocol and any SNMP based management facility can manage the unit if the Management Information Base MIB is installed correctly in the management workstation The Switch 1000 supports SNMP over both IP and IPX protocols Quick Start For SNMP Users This section describes how to get started if you want to use an SNMP Network Manager to manage the Switch It assumes you are already familiar with SNMP management m f you are using IP and you have a BOOTP server set up correctly on your network the IP address for the Switch is detected automatically and you can start managing the Switch without any fur ther configuration m f you are using the IPX protocol the Switch 1000 is allocated an IPX address automatically You can start the SNMP Network Manager and begin managing the Switch m f you are us
14. A protocol allowing communication in a NetWare network IP address Internet Protocol address A unique identifier for a device attached to a network using TCP IP The address is written as four octets separated with full stops periods and is made up of a network section an optional subnet section and a host sec tion LAN Local Area Network A network of connected com puting resources such as PCs printers servers cov ering a relatively small geographic area usually not larger than a floor or building Characterized by high data rates and low error rates latency The delay between the time a device receives a frame and the time the frame is forwarded out of the destination port line speed See baud rate main port The port in a resilient link that carries data traffic in normal operating conditions MDI MDIX Medium Dependent Interface A type of Ethernet twisted pair port connection MDI ports connect to MDIX cross over ports using straight through twisted pair cabling MDI to MDI and MDIX to MDIX links use cross over twisted pair cabling MIB Management Information Base Stores a device s management characteristics and parameters MIBs are used by the Simple Network Management Proto col SNMP to contain attributes of their managed systems The Switch contains its own internal MIB multicast Single packets copied to a specific subset of net work addresses These addresses are specified in
15. As network sizes and traffic levels grow this approach places a strain on the management workstation and also generates large amounts of traffic An RMON probe however autonomously looks at the network on behalf of the management worksta tion without affecting the characteristics and perfor mance of the network The probe reports by exception which means that it only informs the management workstation when the network has entered an abnormal state CHAPTER 5 ADVANCED MANAGEMENT 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 A problem with stand alone RMON probes is that they are passive able to monitor and report but nothing more Placing probe functionality inside the network device allows integration of RMON with normal device management to allow proactive man agement For example statistics can be related to individual ports and the Switch can take autonomous actions such as disabling a port temporarily or permanently if errors on that port exceed a pre defined thresh old Also since a probe needs to be able to see all traffic a stand alone probe has to be attached to a non secure port Implementing RMON in the Sw
16. Frames are being transmitted received on the port Link is present port is enabled Link is present port is disabled Link is not present Plug in Module Status LEDs Packet Status Yellow Green Green flashing Green flashing long on short off Yellow Yellow flashing Off Unit Status LEDs Power MGMT Green Green Green flashing Yellow Yellow flashing Frames are being transmitted received on the Plug in Module port Link is present port is enabled Link is present port is disabled Refer to the SuperStack II Switch ATM OC 3c Module User Guide Plug in Module has failed its Power On Self Test if the MGMT LED is flashing yellow or the agent software of the Plug in Module is not installed correctly Plug in Module is not recognized Link is not present or Plug in Module is not installed in the Switch Switch is powered up Switch is operating normally Switch or Plug in Module is either down loading software or initializing which includes a Power On Self Test Switch has failed its Power On Self Test Plug in Module has failed its Power On Self Test 1 12 CHAPTER 1 GETTING STARTED Unit Overview Rear Socket for Redundant Power System RPS Reset button SE 4 SERIAL D A Cons
17. Security Local Security Security Create User Security Delete Users Security Edit User Monitor Manager Security Status Monitor Manager Security Fault Log Monitor Manager Security Management Setup Monitor read only Manager Security Screen Available to Trap Setup Monitor read only Manager Security Console Port Setup Monitor read only Manager Security Software Upgrade Security Initialize Security Reset Manager Security Remote Poll Manager Security C TROUBLE SHOOTING 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 please contact your local technical support represen tative LEDs Power LED does not light Check that the power cable is firmly connected to the device and to the supply outlet Check the unit fuse For information on changing the fuse refer to Power Supply and Fuse in Appendix A On powering up the MGMT LED lights yellow The unit has failed its Power On Self Test POST and you should contact your supplier for advice On powering up the MGMT LED flashes yel low The installed Plug in Module has failed its Power On Self Test POST Try re installing the Plug in Module ensuring it is properly seated If the prob lem persists contact your supplier for ad
18. Virtual LANS VLANs on page 5 1 STATS Use this button to display statistics screens for the level of management you have chosen port or unit Refer to Chapter 6 SDB Use this button to display the Unit Database View screen which is used to manage the Switch Database Refer to The Database View on page 4 17 RESILIENCE Use this button to display resilient link management screens for the level of management you have chosen port or unit Refer to Setting Up Resilient Links on page 4 19 You cannot set up resilient links if the Switch uses Spanning Tree STP Consequently the RESILIENCE button is not displayed if STP is enabled SuperStack II Switch Management STP SERVER SETUP CANCEL Management Level ULAN Figure 4 9 Switch Management screen for VLAN level SETUP Use this button to display setup screens for the level of management you have chosen port unit or VLAN For information about the Port Setup and Unit Setup screens refer to Setting Up the Switch Ports and Setting Up the Switch Unit in this chapter For information about the VLAN Setup screen refer to Setting Up VLANs on the Switch on page 5 8 Setting Up the Switch Unit With the Switch Management screen displayed choose the management level Unit then select the SETUP button The Unit Setup screen is displayed as shown in Figure 4 10 The screen shows the following Unit N
19. port error 6 6 port traffic 6 4 summary 6 2 Statistics RMON group 5 23 Status screen 6 8 Stop Bit field 4 26 STP 1 5 5 12 Bridge Identifier 5 14 Bridge Protocol Data Units 5 14 configurations 5 16 configuring port properties 5 20 configuring VLAN properties 5 18 default path costs 5 14 Designated Bridge Port 5 14 enabling and disabling 4 11 5 17 Hello BPDUs 5 15 Hello Time 5 14 Max Age 5 15 Root Bridge 5 14 Root Path Cost 5 14 STP State field 5 20 subnet mask device 3 10 Summary Statistics screen 6 2 Switch 1000 1 1 desktop configuration 1 9 dimensions E 1 features 1 1 front view 1 10 initializing 4 28 installing 2 4 LEDs 1 11 logging off 3 12 logging on 3 7 management setup 3 9 port setup 4 12 positioning 2 1 powering up 2 6 rack mounting 2 4 rear view 1 12 resetting 4 27 size E 1 stacking with other units 2 4 unit defaults 1 14 unit setup 4 9 upgrading software 4 29 wall mounting 2 5 weight E 1 workgroup configuration 1 7 1 8 Switch Database 4 16 adding an entry 4 18 ageing entries 4 16 configuring 4 17 deleting an entry 4 18 non ageing entries 4 16 permanent entries 4 16 searching 4 18 traps 4 16 Switch Management screen 4 7 sysName field 4 9 system specifications E 1 System Up Time field 6 8 T technical support F 1 3Com URL F 1 Bulletin Board Service F 1 fax service F 2 network suppliers F 3 product repair F 4 using CompuServe F 2 Telnet 3 2 4 6 terminal emulator connecting 2 7 t
20. 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 POST Power On Self Test An internal test that the Switch carries out when it is powered up protocol A set of rules for communication between devices on a network The rules dictate format timing sequencing and error control resilient link A pair of ports that can be configured so that one will take over data transmission should the other fail See also main port and standby port RJ45 Standard 8 wire connectors for IEEE 802 3 10BASE T networks RMON Remote Monitoring Subset of SNMP MIB II which allows monitoring and management capabilities by addressing up to ten different groups of informa tion RPS Redundant Power System Part of the SuperStack Il product range provides a backup source of power when connected to the Switch server farm A cluster of servers in a centralized location serving a large user population SLIP Serial Line Internet Protocol A protocol which allows IP to run over a serial line connection SmartAgent Intelligent management agents in devices and logi cal connectivity systems that reduce the computa tional load on the network management station and reduce management oriented traffic on the net w
21. 1000 TECHNICAL SPECIFICATIONS Height 76mm 3 0in x Width 483mm 19 0in x Depth 300mm 12 0in Weight 4 4kg 9 71bs Environmental Requirements Operating Temperature Storage Temperature Operating Humidity Standards 0 50 C 32 122 F 10 70 C 14 158 F 10 95 relative humidity non condensing EN60068 IEC68 Safety Agency Certifications AC Protection UL 1950 EN60950 CSA 22 2 No 950 5A Time Delay Fuse Electromagnetic Compatibility EN55022 Class B FCC Part 15 Subpart B Class A ICES 003 Class A VCCI Class 2 AS NZS 3548 Class B EN 50082 1 Category 5 screened cables must be used to ensure compliance with the Class B Class 2 requirements of this standard The use of unscreened cables Category 5 for 100BASE TX ports and Category 3 and 5 for 10BASE T ports complies with the Class A Class 1 requirements Heat Dissipation 100W maximum 341 BTU hour maximum Power Supply AC Line Frequency Input Voltage Options Current Rating 50 60 Hz 100 120 200 240 VAC 3A maximum at 100 VAC 2A maximum at 200 VAC E 2 APPENDIX E SWITCH 1000 TECHNICAL SPECIFICATIONS 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 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 A
22. 13 Reset Button 1 13 Console Port 1 13 Plug in Module Slot 1 13 Transceiver Module Slot 1 13 Ethernet Address 1 13 Unit Defaults 1 14 Managing the Switch 1000 1 14 Quick Start For SNMP Users 1 15 Entering an IP Address for the Switch 1 15 INSTALLATION AND SETUP Following Safety Information 2 1 Positioning the Switch 1000 2 1 Configuration Rules for Fast Ethernet 2 2 Configuration Rules with Full Duplex 2 2 Installing the Switch 1000 2 4 Rack Mounting 2 4 Stacking the Switch and Other Units 2 4 Wall Mounting 2 5 Powering up the Switch 2 6 Connecting a Redundant Power System RPS 2 6 Connecting Equipment to the Console Port 2 7 Connecting a VT100 Terminal 2 7 Connecting a VT100 Terminal Emulator 2 7 Connecting a Workstation Running SLIP 2 8 SETTING UP FOR MANAGEMENT Methods of Managing the Switch 1000 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 Screen Conventions 3 4 Keyboard Shortcuts 3 5 Correcting Text Entry 3 5 Setting Up the Switch for Management 3 6 Logging On 3 7 After Logging On 3 8 Switch Management Setup 3 9 Logging Off 3 12 Auto Logout 3 12 MANAGING THE SWITCH 1000 Setting Up Users 4 2 Creating a New User 4 3 Deleting a User 4 4 Editing User Details 4 5 Assigning Local Security 4 6 Choosing a Switch Management Level 4 7 Setting Up the Switch Uni
23. 3 e 3 RxD DTR 4 e e 1 DCD RxD 2 e 2 TxD always required TxD 3 RxD always required Ground 5 e 7 Ground RxD 2 e 3 TxD RTS 7 e 4 RTS 1 CTS 8 e 4 DTR CTS 8 e 20 DTR Ground 5 e 5 Ground DSR 6 e 5 CTS usine DSR 6 6 DSR E EEA DCD 1 eq r 6 DSR RTS 7 e 7 RTS DTR 4 e L 8 DCD DCD 1 e 8 CTS D 2 APPENDIX D PIN OUTS Modem Cable 9 pin to RS 232 25 pin Switch 1000 RS 232 Modem Port Cable connector 9 pin female Cable connector 25 pin male Screen Shell Screen TxD 3 e 2 TxD RxD 2 3 RxD RTS 7 4 RTS CTS 8 e 5 CTS DSR 6 6 DSR Ground 5 e 7 Ground DCD 1 e 8 DCD DTR 4 e 20 DTR RJ45 Pin Assignments Pin assignments are identical for 10BASE T and 100BASE TX RJ45 connectors Ports configured as MDI Pin Number Function TxData Transmit data TxData Transmit data RxData Receive data ot Assigned ot Assigned RxData Receive data ot Assigned ot Assigned Ports configured as MDIX Pin Number Function RxData Receive data RxData Receive data TxData Transmit data ot Assigned ot Assigned TxData Transmit data ot Assigned ot Assigned Physical Dimensions E SWITCH
24. 6 3 Frames Forwarded summary 6 2 Frames Received port traffic 6 4 Frames Received summary 6 2 Frames Transmitted port traffic 6 4 Frames Transmitted summary 6 2 IFM Count port traffic 6 5 Jabbers port error 6 7 Late Events port error 6 6 Long Frames port error 6 6 Multicasts Received port traffic 6 4 Multicasts Received summary 6 2 Multicasts Transmitted summary 6 2 Octets Received port traffic 6 4 Octets Transmitted port traffic 6 4 resetting to zero 6 2 6 5 6 7 Short Events port error 6 6 Create User screen 4 3 D Data Link Protocol field 3 10 database See Switch Database DCD Control field 4 25 default passwords 3 7 settings 1 14 users 3 7 Default RMON Host Matrix field 4 11 Default Router field 3 10 Default VLAN 5 3 5 9 Delete Users screen 4 4 Designated Bridge field 5 21 Designated Bridge Port 5 14 Designated Cost field 5 21 designated downlink port See backbone port Designated Port field 5 20 Designated Root field 5 18 5 21 Destination field 4 29 Device IP Address field 3 10 Device Subnet Mask field 3 10 Disable Interactive Access field 4 13 Downlink Module See Plug in Module downlink port See backbone port DSR Control field 4 25 Duplex Mode field 4 11 4 14 E Edit User screen 4 5 Ethernet address location on the unit 1 13 Events RMON group 5 24 F Falling Action field 4 15 Falling Threshold field 4 14 Fast Boot tests 3 9 Fast Etherne Fast Start fie
25. 9 Backup VLAN Server IP Address field 5 11 baud rate See line speed boot software version number 6 8 BOOTP Select field 3 10 BOOTP server 3 6 BPDUs See Bridge Protocol Data Units Bridge Forward Delay field 5 19 Bridge Hello Time field 5 19 Bridge Identifier 5 14 Bridge Max Age field 5 19 Bridge Priority field 5 19 Bridge Protocol Data Units 5 14 bridges vs Switch 1000 1 3 Bridging Mode field 4 10 Broadcast Storm Control field 4 14 Bulletin Board Service F 1 C cable maximum length 1 11 2 2 pin outs D 1 Capture RMON group 5 24 Char Size field 4 26 Community String field 4 3 4 5 4 24 community strings changing 4 5 role in trap setup 4 24 Community SNMP field 4 6 CompuServe F 2 Confirm Password field 4 5 Connection Type field 4 25 console port 1 13 auto configuration 4 25 connecting equipment to 2 7 connection type 4 25 setting up 4 25 speed 4 25 Console Port field 4 6 Console Port Setup screen 4 25 conventions notice icons About This Guide 2 text About This Guide 2 counters Bandwidth Used port 6 3 Broadcast Frame Bandwidth port 6 3 Broadcast Received port traffic 6 4 Collisions port traffic 6 4 CRC Align Errors port error 6 6 Errors port traffic 6 5 Errors port 6 3 Errors summary 6 2 Fragments port traffic 6 5 Frame Size Analysis port traffic 6 5 Frames Filtered port traffic 6 5 Frames Filtered summary 6 2 Frames Forwarded port traffic 6 5 Frames Forwarded port
26. If you are using IP a unique IP address must be specified in this field If you do not know the IP address of the Switch consult your net work administrator You must reset the Switch after changing this parameter Device SubNet Mask If you are using IP enter a suitable network mask For a Class B IP address 255 255 0 0 is suitable For more information con tact your network administrator You must reset the Switch after changing this parameter Default Router If a default router exists on your network enter the IP address of the router You must reset the Switch after changing this parameter BOOTP Select Enabled Disabled If BOOTP is enabled and you have a BOOTP server on your net work an IP address is automatically mapped to the Switch when it is first powered up In addition to mapping an IP address BOOTP can also assign the subnet mask and default router Using a BOOTP server avoids having to configure devices individu ally SLIP Address If you are using SLIP enter an address that has a network part different to the network address of the Switch For more information con tact your network administrator You must reset the Switch after changing this parameter SLIP SubNet Mask Enter a suitable SubNet Mask For a Class B address 255 255 0 0 is suitable For more information contact your network administra tor You must reset the Switch after changing this parameter There are four entries under the following
27. Local Create Delete Edit Security User Users User i 2 a 7 r gt r gt r gt r r Port Port Port Port Unit Unit Unit Unit VLAN VLAN VLAN STP Statistics Resilience Setup Statistics Database Resilience Setup STP Server Setup f Port Traffic Port Error Statistics Analysis Figure 4 1 Screen map 4 2 CHAPTER 4 MANAGING THE SWITCH 1000 SuperStack II Switch User Access Levels Setting Up Users From the Main Menu select USER ACCESS LEVELS The User Access Levels screen appears as shown in Figure 4 2 CREATE USER DELETE USERS EDIT USER From this screen you can access m LOCAL SECURITY screen This allows you to MAIN MENU set up access levels for users on the Switch m CREATE USER screen This allows you to create up to 10 users in addition to the default E users set up on the Switch m DELETE USERS screen This allows you to delete users from the Switch The default users cannot be deleted Figure 4 2 User Access Levels screen EDIT USER screen This allows you to change your own password and community string You cannot change details for other users Creating a New User These steps assume the User Access Levels screen is displayed Select the CREATE USER option The Create User screen is displayed as shown in Figure 4 3 Fill in the fields and assign an access level for the new user When the form is complete select OK The Create Us
28. Port Traffic Statistics screen Multicasts Received The number of frames suc Frames Transmitted The number of frames that have been successfully transmitted by the port including fragments and frames with errors Octets Received The number of octets received by the port The calculation includes the MAC header and Cyclical Redundancy Check CRC but excludes preamble Start of Frame Delimiter SFD Octet counters are accurate to the nearest 256 octet boundary Octets Transmitted The number of octets transmit ted by the port The calculation includes the MAC header and CRC but excludes preamble SFD Octet counters are accurate to the nearest 256 octet boundary cessfully 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 colli sions that occurred when transmitting from the unit Collisions are a normal part of Ethernet operation that occur when two devices attempt to transmit at the same time A sudden sustained increase in the number of collisions may indicate a problem with a device or cabling on the network particularly if this is not accompanied by an increase in general net work traffic Fragments The total number of packets received that were n
29. back to the factory defaults ok EEE Figure 4 19 Initialize screen m VLT ports fail and you are not able to manage the Switch if your management station communi cates via the VLT To avoid this a Remove the VLT configuration from both ends of the VLT link before you initialize the Switch Note that the port furthest from your manage ment station should have its VLT configuration removed first b Reconfigure the VLT once the initialization is com plete Upgrading Software gt When 3Com issues a new version of agent software for the Switch you can obtain it from the 3Com s information delivery systems described in Online Technical Services on page F 1 For upgrading the ATM OC 3c Module software refer to the SuperStack Il Switch ATM OC 3c Module User Guide You use the Software Upgrade screen to download new software images The protocol used for down loading software images is TFTP running over UDP IP or IPX CAUTION Before attempting to download note the following m The download only works over the network it does not work through the console port m The download does not work over a Virtual LAN Trunk VLT if you have a Boot software version lower than version 2 0 m The download does not work over an ATM link If a software download over IPX fails enter the MAC or Ethernet address of your server into the Switch Database via the Unit Database View screen and then at
30. backbone port If the port uses AutoSelect VLAN Mode or is the standby port of a resilient link pair you cannot spec ify that it is a backbone port Each VLAN can have one backbone port By default all ports belong to the Default VLAN VLAN 1 because of this an unconfigured Switch unit can only have one backbone port If you specify that an ATM OC 3c Module port is a backbone port the port becomes a backbone port for all the VLANs on which it is active It cannot be the backbone port for one VLAN and a standard port for another If you fit a Plug in Module into a Switch with no specified backbone ports the Module automatically becomes the backbone port for the Default VLAN when you power up or initialize the Switch If a Switch has no Plug in Module but you fit a Trans ceiver Module this becomes the backbone port for the Default VLAN when you power up or initialize the Switch APPLY This button applies any changes to the VLAN database ATM LEC Setup If the port is an ATM OC 3c Module port this button allows you access the VLAN LEC Setup screen for extending your VLANs into an ATM network For more information refer to the SuperStack Il Switch ATM OC 3c Module User Guide CHAPTER 5 ADVANCED MANAGEMENT Assigning a Port to a VLAN When Using Port VLAN Mode In the Port ID field enter the ID of the required port In the VLAN ID field enter the ID of the required VLAN Select APPLY CAUTION Initially a
31. cabling routing and re route any cabling which may be affected by external noise sources SuperStack II Switch Port Error Analysis Port ID 24 16BASET CRC Align Errors Short Events Late Events Long Frames Jabbers CLEAR SCREEN COUNTERS Figure 6 4 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 A late event is also counted as a collision Long Frames This counter is incremented by one each time a frame is received whose octet count is greater than the maximum frame size but less than Jabber frame size Long Frames are frames that exceed the maximum size defined for Ethernet frames 1518 octets If you see a high number of long frames on your network you should isolate the source of these frames and examine the transceiver or adapter card at the device Some protocols may generate these frames 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 This button does not clear the counters on the device or affect
32. changes the first bridge to detect the change sends out an SNMP trap An Example Figure 5 13 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 The Des ignated Bridge Port for LAN A is port 1 on Bridge A Each of the other four bridges have a Root Port the port closest to the Root Bridge Bridge X and Bridge B can offer the same path cost to LAN B In this case Bridge B s port is chosen as the Designated Bridge Port because it has the lowest Bridge Identi fier Bridge C s port is chosen as the Designated Bridge Port for LAN C because it offers the lowest Root Path Cost the route through Bridge C and B costs 200 the route through Bridge Y and B would cost 300 You can set the path cost of a bridge port to influence the configuration of a network with a duplicate path Once the network topology is stable all the bridges listen for special Hello BPDUs transmitted from the Root Bridge at regular intervals If the STP Max Age time expires refer to Configuring the STP Parame ters of VLANs on page 5 18 before receiving a Hello BPDU it assumes that the Root Bridge or a link between itself and the Root Bridge has gone down It then initiates a reconfiguration of the net work topology You can adjust timers to determine how quickly a netwo
33. configuration rules 2 2 Id 5 21 Fault Log screen 6 9 Fault Log in erpreting 6 9 fax service See 3ComFacts fields Access Level 4 3 Active Por 4 21 4 22 Auto Config 4 25 Backbone Backup VLAN Server IP Address 5 11 BOOTP Se Bridge For Bridge Hel Bridge Ma Port 4 11 5 9 lect 3 10 ward Delay 5 19 lo Time 5 19 xAge 5 19 Bridge Priority 5 19 Bridging Mode 4 10 Broadcast Char Size Storm Control 4 14 4 26 Community String 4 3 4 5 4 24 Community SNMP 4 6 Confirm Password 4 5 Connection Type 4 25 Console Port 4 6 Data Link Protocol 3 10 DCD Control 4 25 Default RMON Host Matrix 4 11 Default Router 3 10 Designated Bridge 5 21 Designated Cost 5 21 Designated Port 5 20 Designated Root 5 18 5 21 Destination 4 29 Device IP Address 3 10 Device Subnet Mask 3 10 Disable Interactive Access 4 13 DSR Control 4 25 Duplex Mode 4 11 4 14 Falling Action 4 15 Falling Threshold 4 14 Fast Start File Name 5 21 4 29 Flow Control 4 25 Forward D elay 5 19 Forwarding Mode 4 9 Fwd Transitions 5 21 Hello Time 5 18 Hold Time 5 19 Intelligent Flow Management 4 12 Intelligent Forwarding 4 9 IP or IPX Address 4 24 IPX Network 3 10 Link State 4 20 Lost Links 4 12 MAC Address 3 9 4 17 MAIN Port 4 22 Main Port ID 4 20 Management Level 4 7 Max Age 5 18 New Password 4 5 Node 3 10 Old Password 4 5 PACE 4 10 Pair Enable 4 21 4 23 Pair State 4 20 4 22 Parity 4
34. detects is 19 200 baud Appropriate cables are available from your local sup plier If you need to make your own cables pin outs are detailed in Appendix D Connecting Equipment to the Console Port 2 7 Connecting a VT100 Terminal To connect a VT100 terminal directly to the console port on the Switch you need a standard null modem cable 1 Connect one end of the cable to the console port on the Switch and the other to the console port on the VT100 terminal 2 Ensure that your terminal is set to 8 data bits m no parity 1 stop bit If auto configuration is enabled for the Switch the terminal s line speed baud rate is detected auto matically Connecting a VT100 Terminal Emulator 1 Ensure that the workstation is running a suitable terminal emulation package There are many avail able contact your local supplier for further details 2 If you are using a PC you need a null modem cable with an appropriate connector Connect one end of the cable to the workstation and the other end to the console port on the Switch 3 Ensure that your workstation is set to 8 data bits m no parity m 1 stop bit If auto configuration is enabled for the Switch the workstation s line speed baud rate is detected automatically 2 8 CHAPTER 2 INSTALLATION AND SETUP Connecting a Workstation Running SLIP You can communicate with the Switch via the con sole port from a workstation running SLIP Serial Line Internet Pr
35. for the Switch This screen also allows you to display screens for setting up the console port and traps To access the Setup screen from the Main Menu screen select the MANAGEMENT SETUP option The Setup screen appears as shown in 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 to Unit Overview Rear on page 1 12 The screen shows the following MAC Address This read only field shows the MAC address of the Switch unit which is required for management Power On Self Test Type Normal Extended This field allows you to determine the type of self test that the Switch carries out when it is powered up If the field is set to Normal the Switch performs a Fast Boot a basic confidence check lasting approximately 13 seconds When the Switch per forms a Fast Boot it carries out the following tests m Checksum test of boot and system areas of Flash memory m System memory tests m MAC address verification test m System timer test Setting Up the Switch for Management 3 9 SuperStack II Switch Management Setup MAC Address 68664E 6B99A5 Power On Self Test Type Normal Device IP Address 191 1 1 58 Device SubNet Mask 255 255 255 8 1 SLIP Address 192 101 1 1 SLIP SubNet Mask 255 255 255 0 Default Router 191 1 1 28 BOOTP
36. four fields one for each data link layer protocol that can be used by IPX IPX Network This read only field shows the address of the network for this protocol This address is learned automatically from the local IPX router or NetWare File Server and you do not need to change it Node This read only field shows the node address of the Switch which is learned automatically Status Enabled Disabled If this field is set to Enabled you have access to the medium access pro tocol Set this field to Disabled if you wish to pre vent access for security reasons Data Link Protocol This read only field shows the name of the IPX data link layer protocol SETUP TRAPS Select this button to display the setup screen for trap parameters Trap setup is described in Setting Up Traps on page 4 24 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 on page 4 25 Setting Up the Switch for Management 3 12 CHAPTER 3 SETTING UP FOR MANAGEMENT Logging Off SuperStack II Switch Auto Logout If you have finished using the VT100 management interface select the LOGOFF option from the bottom of the Main Menu screen If you accessed the VT100 management interface using a Telnet ses Auto Logout in Progress Please Re enter Password sion or modem connection the connection is closed automatically Pee PUS Pa
37. installing and set ting up network equipment consequently it assumes a basic working knowledge of Local Area Networks If the information in the Release Notes shipped with your product differs from the information in this guide follow the Release Notes Throughout this guide the SuperStack II Switch 1000 is referred to as the Switch 1000 or Switch How to Use This Guide This table shows where to find specific information in this guide If you are looking for Turn to An overview of the Switch 1000 Chapter 1 Information about installing the Switch 1000 into Chapter 2 your network Information about the methods you can use to man Chapter 3 age the Switch 1000 Information about managing the Switch 1000 Chapter 4 Information about more advanced management fea Chapter 5 tures for example VLANs Spanning Tree and RMON Information about monitoring the status of the Chapter 6 Switch 1000 Safety information Appendix A Information about the access rights for each VT100 Appendix B screen Trouble shooting information Appendix C Information about the pin outs relating to the Switch Appendix D 1000 Information about the Technical Specifications of the Appendix E Switch 1000 Information about the Technical Support available Appendix F from 3Com Conventions Table 1 and Table 2 list conventions that are used throughout this guide Table 1 Text Conventions Convention Description
38. 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 If the port is an ATM OC 3c Module port the ATM Port Statistics screen is displayed For more informa tion refer to the SuperStack II Switch ATM OC 3c Module User Guide The Port Statistics screen shows the following Port ID The ID of the port you are currently manag ing Bandwidth Used This counter provides a running average of the bandwidth used by the port expressed as a percentage of the maximum band width available for the port A sampling period of one minute is used The value gives an indication of the general traffic level of the network A high utili zation for single endstation segments is an indica tion that your network is operating efficiently However if multiple endstations are connected to this port and you see values of around 40 you should reconsider the topology of your network because each user will see degraded network per formance Port Statistics 6 3 SuperStack II Switch Port Statistics Port ID 24 16BASET Bandwidth Used Frames Forwarded 99 Broadcast Frame Bandwidth Error Frames TRAFFIC STATISTICS ERROR ANALYSIS CANCEL Figure 6 2 Port Statistics screen Frames Forwarded This counter provides a running average of the proportion of frames received by the port that are forwarded expressed as a p
39. port number into this field before selecting the next screen For 3C16900A ports 1 24 are the 10BASE T ports port 25 is the Plug in Module port at the rear of the unit and port 26 is the 100BASE TX port Choosing a Switch Management Level 4 7 SuperStack II Switch Management Management Level Port Port ID default 1 1 Enter port number 1 24 25 Module 26 186BASE TX STP STATS RESILIENCE SETUP Figure 4 7 Switch Management screen for Port level 3C16900A SuperStack II Switch Management Management Level unit STATS SDB RESILIENCE SETUP Figure 4 8 Switch Management screen for Unit level For 3C16901A ports 1 12 are the 10BASE T ports port 13 is the Plug in Module port at the rear of the unit and port 14 is the 100BASE TX port CHAPTER 4 MANAGING THE SWITCH 1000 STP Use this button to display screens for managing Spanning Tree Protocol STP information for the level of management you have chosen port or VLAN Refer to Spanning Tree Protocol on page 5 12 STP is not supported over Asynchronous Transfer Mode ATM Consequently if you specify that you want to manage the Plug in Module and the Switch has an ATM OC 3c Module installed the STP button is not displayed SERVER Use this button to display the VLAN Server screen used for entering the IP address and com munity string of a VLAN server For more informa tion about VLAN servers refer to
40. previous 20 second interval The average is based on four samples taken at 5 second intervals m 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 CHAPTER 4 MANAGING THE SWITCH 1000 Setting Up the Switch Database SDB The Switch maintains a database of device addresses that it receives on its 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 If you have set up Traps for the Switch notification that the database is becoming full is provided by two traps m Database is 90 full m Database is 100 full These traps indicate that the maximum number of devices which can be connected to the Switch has been reached You cannot connect any more devices to the Switch Additional devices can however be connected to the rest of the network Entries are added into the Switch Database in two ways m The Switch can learn entries That is the unit updates the SDB with the source MAC address and the port identifier on which the source MAC address is seen Addresses are not learned on the backbone port Learning is affected by secu rity refer to the description f
41. specify how the port is placed in a VLAN m Port The port uses Port VLAN Mode which means that the port is manually placed in the required VLAN m 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 m Unit Default The port uses Port VLAN Mode or AutoSelect VLAN Mode depending on the con tents of the VLAN Configuration Mode field in the Unit Setup screen This is the default setting For more information refer to Using AutoSelect VLAN Mode on page 5 3 Broadcast Storm Control The Switch automati cally creates an alarm on each of its ports to moni tor 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 and specify an action to take place if the threshold is exceeded Rising Threshold This field allows you to specify the percentage of broadcast traffic on the current port which triggers the alarm for the port The default is 20 Falling Threshold This field allows you to specify the percentage of broadcast traffic on the current port required to reset the alarm for the port The falling threshold prevents the rising threshold events being triggered continuously The default is 10 Rising Action none event disable port disable port n
42. the equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington DC 20402 Stock No 004 000 00345 4 In order to meet FCC emissions limits this equipment must be used only with cables which comply with IEEE 802 3
43. this chapter Backbone connecting multiple switches Switch A Switch B 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 ES eS iO Gs G amp S gt Development Department VLAN 3 eS eS eS Es EGS SS ES Marketing Department VLAN 1 Figure 5 1 Finance Department VLAN 2 The concept of VLANs VLANs and the Switch The Switch 1000 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 Each Switch 1000 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 and Moving Ports From the Default VLAN On each Switch VLAN 1 is the Default VLAN of the Switch it has two properties m It contains all the ports on a new or initialized Switch m tis the only VLAN which allows an SNMP Net work Manager to access the management agent of the unit By default if a device is attached to a port in the Default VLAN and you want to move the device into another VLAN you need to use the VLAN Setup screen to place the port in that VLAN For more information about the VLAN Setup screen refer to Setting Up VLANs on the S
44. 0 bps 61 2 9955 2073 Brazil up to 14400 bps 55 11 547 9666 France up to 14400 bps 33 1 6986 6954 Germany up to 28800 bps 4989 62732 188 Hong Kong up to 14400 bps 852 2537 5608 Italy fee required up to 14400 bps 39 2 27300680 Japan up to 14400 bps 81 3 3345 7266 Mexico up to 28800 bps 52 5 520 7853 P R of China up to 14400 bps 86 10 684 92351 Singapore up to 14400 bps 65 534 5693 F 2 APPENDIX F TECHNICAL SUPPORT Country Data Rate Telephone Number Local access numbers are available within the _ following countries Taiwan up to 14400 bps 886 2 377 5840 U K up to 28800 bps 44 1442 438278 Telephone Telephone U S A up to 28800 bps 1 408 980 8204 Country Number Country Number Australia 1 800 123853 Netherlands 06 0228049 Access by Digital Modem Belgium 0800 71279 Norway 800 11062 ISDN users can dial in to 3ComBBS using a digital Denmark 800 17319 Portugal 0505 442 607 modem for fast access up to 56 Kbps To access Finland 98 001 4444 Russia 956 0815 3ComBBS using ISDN use the following number Moscow only France 05 90 81 58 Spain 900 964 445 1 408 654 2703 4 Germany 0130 81 80 63 Sweden 020 792954 3ComFacts Automated Fax Service Italy 1678 99085 U K 0800 626403 3Com Corporation s interactive fax service 3ComFacts provides data sheets technical articles diagrams and troubleshooting instructions on 3Com products 24 hours a day 7 days a week 3ComForum on CompuServe Online Service 3ComForum contains patches sof
45. 00 is covered by Oftel General Approval NS G 12345 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 Do not remove the Plug in Module or Transceiver Module blanking plate with the power still con nected Power Supply and Fuse The unit automatically adjusts to the supply volt age The fuse is suitable for both 110V A C and 220 240V A C operation WARNING Ensure that the power is disconnected before opening the fuse holder cover Correct fuse location Incorrect fuse location DO NOT USE To change the fuse release the fuse holder by gently levering a small screwdriver under the fuse holder catch Only 5A Time Delay anti surge fuses of the same type and manufacture as the original should be used 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 Important Safety Information A 3 RJ45 Ports The RJ45 ports are shielded RJ45 data sockets They cannot be used as telephone sockets Only connect RJ45 data connectors to these sockets Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets Fiber Ports Under normal viewing conditions there is no hazard from the fiber Transmit L
46. 11 Specifying AutoSelect VLAN Mode 5 11 Spanning Tree Protocol 5 12 What is STP 5 12 How STP Works 5 14 STP Initialization 5 14 STP Stabilization 5 14 STP Reconfiguration 5 14 An Example 5 15 STP Configurations 5 16 Enabling STP on the Switch 5 17 Configuring STP on the Switch 5 18 Configuring the STP Parameters of VLANs 5 18 Configuring the STP Parameters of Ports 5 20 RMON 5 22 What is RMON 5 22 About the RMON Groups 5 23 Statistics 5 23 History 5 23 Alarms 5 23 Hosts 5 23 Hosts Top N 5 23 Matrix 5 24 Filter 5 24 Capture 5 24 Events 5 24 Benefits of RMON 5 25 How RMON Improves Your Efficiency 5 25 How RMON Allows Proactive Management 5 25 How RMON Reduces the Traffic Load 5 25 RMON and the Switch 5 26 RMON Features of the Switch 5 26 About Alarm Actions 5 28 About Default Alarm Settings 5 29 About the Audit Log 5 29 STATUS MONITORING AND STATISTICS Summary Statistics 6 2 Port Statistics 6 3 Port Traffic Statistics 6 4 Port Error Analysis 6 6 Status Monitoring 6 8 Fault Log 6 9 Remote Polling 6 10 SAFETY INFORMATION Important Safety Information A 1 Power Supply and Fuse A 3 Sockets for Redundant Power System RPS A 3 RJ45 Ports A 3 Fiber Ports A 3 L information de S curit Importante A 4 La Source de Courant et Le Fusible A 5 Socle Pour Alimentation Multiple A 5 Les Ports RJ45 A 6 Les Ports Fibre A 6 Wichtige Sicherheitsinformationen A 7 Stromversorgung und Sicherung A 8 Steckdose f r Redundan
47. 26 Password 3 7 4 3 Path Cost 5 21 Plug in Module Type 4 11 Poll Period 5 11 Port Number 4 17 Port Speed 4 12 Port State 4 12 Power On Self Test Type 3 9 Power Supply 4 11 Priority 5 21 Remote Telnet 4 6 Rising Action 4 15 Rising Threshold 4 14 Root Cost 5 18 Root Port 5 19 SDB Ageing Time 4 11 Security 4 13 Server Address 4 29 SLIP Address 3 10 SLIP Subnet Mask 3 10 Spanning Tree 4 11 Speed 4 26 Standby Links Available 4 20 STANDBY Port 4 22 Standby Port ID 4 20 Stop Bit 4 26 STP State 5 20 sysName 4 9 System Up Time 6 8 Throttle 4 24 5 11 Time Since Topology Change 5 19 Topology Changes 5 18 Transceiver Module Type 4 11 Type 5 8 Unit Name 4 9 User Name 3 7 4 3 VLAN Configuration Mode 4 10 4 14 VLAN ID 5 9 5 18 VLAN Membership 5 9 VLAN Server Community String 5 11 VLAN Server IP Address 5 11 VLT Mode 4 13 File Name field 4 29 Filter RMON group 5 24 Flow Control field 4 25 Forward Delay field 5 19 forwarding 1 3 Forwarding Mode field 4 9 full duplex 1 4 configuration rules 2 2 enabling and disabling 4 11 4 14 fuse changing A 3 Fwd Transitions field 5 21 H hardware version number 6 8 Hello BPDUs 5 15 Hello Time 5 14 Hello Time field 5 18 History RMON group 5 23 Hold Time field 5 19 Hosts RMON group 5 23 Hosts Top N RMON group 5 23 IFM See Intelligent Flow Management Initialization screen 4 28 initializing the Switch 4 28 installing the Switch 2 4 Intelligent Flow M
48. 3 Forwarding of Packets The table below shows how a packet is processed when it arrives at the Switch 1000 Address Learning Forwarding Mode Operation when packet buffers full Spanning Tree Action on Unknown Destination Address Database size All ports Store and forward Discard packets Supported Flood all ports 4000 addresses All ports except back bone port Fast Forward Frag ment Free Store and forward or Intelligent Invoke Intelligent Flow Management to suppress transmis sions at source Optional Forward to backbone port or forward to all ports 500 addresses In all other ways Switch 1000 and bridge opera tion is identical Packet Source Destination Action Address Any port EXCEPT back Unknown Forward to back bone Unicast packet Any port EXCEPT back bone Multi Broadcast packet Backbone port Unicast packet Backbone port Multi Broadcast packet gt Same port as source address Another port not backbone Not applicable Unknown Known port not backbone Not applicable bone port only or forward to all ports Filter Forward to specific port only Forward to all ports including back bone in the same VLAN as source port Filter Forward to known port only Forward to all ports within specific VLAN You can configure the Switch to forward packets with an unknown destination address to all ports in the s
49. 30V 2P T via un rapport de transformation d iso lation de 1 1 avec un point de connexion sec ondaire tiquet Neutre branch directement la Terre la Masse m Ne pas enlever le Plug in Module ou la plaque d occultation de module d metteur r cepteur avec la puissance encore branch e L information de S curit Importante A 5 La Source de Courant et Le Fusible L unit s ajuste automatiquement la tension d ali mentation Le fusible est convenable aux deux op rations 110 V C A et 220 240 V C A AVERTISSEMENT Assurer que l alimentation soit d branch e avant d ouvrir le couvercle du contenant du fusible L emplacement du fusible correct L emplacement du fusible incorrect NE PAS UTILISER Pour changer le fusible d gager le contenant du fusible en mettant doucement un petit tournevis sous l arr t de contenant du fusible Seulement les fusibles de types 5A anti transitoires du m me type et fabricant que l original doivent tre utilis s Socle Pour Alimentation Multiple Brancher seulement une alimentation multiple de 3Com cet socle Suivre pour les d tails les direc tives de l installation dans le manuel qui accompa gne l alimentation multiple A 6 APPENDIX A SAFETY INFORMATION Les Ports RJ45 Ceux ci sont les prises de courant de donn es RJ45 prot g es Ils ne peuvent pas tre utilis s comme prises de courant t l phoniques Brancher seule ment les connecteurs RJ4
50. 5 de donn es ces prises de courant Les c bles de donn es blind s ou non blind s avec les jacks blind s ou non blind s l un ou l autre peuvent tre branch s ces prises de courant de donn es Les Ports Fibre Sous les conditions de visionnement ordinaires il n y a pas de danger l oeil cause de la diode lec troluminescente d mission C est recommand cependant que la diode lectroluminescente ne soit pas examin e avec aucun appareil de grossisse ment pendant qu elle est sous tension C est recommand que le port de fibre Tx et les fins de c ble du fibre ne soient jamais directement exam in es pendant qu ils soient sous tension Wichtige Sicherheitsinformationen WARNUNG Warnungen enthalten Anweisungen die zur eigenen Sicherheit unbedingt zu beachten sind Bitte befolgen Sie alle Anweisungen sorgf ltig und genau Bitte unbedingt vor dem Einbauen des Switch 1000 Einheit die folgenden Sicherheitsanweisungen durchlesen m Ein und Ausbau des Ger tes ist nur von Fachpersonal vorzunehmen m Wenn die Switch 1000 Einheit in einer Stapel mit anderen SuperStack II Hub Einheiten einge baut werden soll mu die Switch 1000 Einheit unter die schmaleren Hub Einheiten eingebaut werden m Dieses Ger t mu geerdet sein m Das Ger t an geerdete Stromversorgung anschlie en um eine bereinstimmung mit den europ ischen Sicherheitsbestimmungen zu gew hrleisten m Der Anschlu ka
51. Available Lost Links 8 Refer to the User Guide before changing the settings of these parameters Intelligent Flow Management e Security Sricsbied Disable Interactive Access o ULT mode Disable Duplex Mode unit Default ULAN Configuration mode Unit Default Broadcast Storm Control Rising Threshold 26 Action blip port notify Falling Threshold 19 Action none OK Figure 4 11 Port Setup screen 10BASE T port Lost Links This read only field shows 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 gt If the port is directly connected to an endstation the Lost Links counter increments each time the endstation goes through a power off on cycle Intelligent Flow Management Enable Disable This field allows you to enable or disable Intelligent Flow Management IFM IFM minimizes packet loss which can occur with conventional switches gt IFM should be disabled if the port is connected to a repeated segment where the traffic is mainly local to that segment Refer to Server Connections in Chapter 1 IFM is not available on a port which has full duplex enabled f the Duplex Mode field in this screen is set to Full Duplex the Intelligent Flow Management field is not displayed m In all other cases where the port has full duplex enabled I
52. CH 1000 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 RESIL IENCE button The Port Resilience screen is displayed as shown in Figure 4 14 This screen allows you to setup edit and delete resilient link pairs The screen shows the following Main Port ID This read only field shows the ID of the main port Media Type Twisted Pair Fiber This read only field shows the media type connected to the main port Link State Available Not Available Not Present This read only field shows the connection state of the main port m Available The port is operating normally m Not Available The resilient link pair is disabled m Not Present The port is not present in the cur rent hardware Standby Port ID This field shows the current standby port ID and allows you to enter a new port ID The standby port must be in the same VLAN as the main port Media Type Twisted Pair Fiber This read only field shows the standby port media type SuperStack II Switch Port Resilience Standby Links Available Port ID r Main Port ID 1 Media Type Twisted Pair 2 Link State Available 3 4 5 Standby Port ID 2 6 Media Type Twisted Pair 7 Link State Not Available 8 9 Pair State Active 18 Active Port ain 11 Pair Enable Enabled APPLY DELETE Figure 4 14 Port
53. ED It is recommended however that the LED is not viewed through any magnifying device whilst it is powered on It is advisable that the fiber Tx port and fiber cable ends are never viewed directly when powered on APPENDIX A SAFETY INFORMATION L information de S curit Importante AVERTISSEMENT Les avertissements contiennent les directions que vous devez suivre pour votre s cu rit personnelle Suivez toutes les directives avec soin Veuillez lire fond l information de la s curit suiva nte avant d installer le Switch 1000 m L installation et l enl vement de l unit doivent tre faits seulement par le personnel qualifi m Si vous entassez l unit Switch avec les unit s SuperStack II Hub l unit Switch 1000 doit tre install e en dessous des unit s Hub plus troites m Cette unit doit tre mise la terre m Brancher l unit une source de courant mise la terre pour assurer la conformit aux normes de s curit europ ennes m La cordon d alimentation surmoul doit tre approuv pour le pays auquel il sera utilis m Le socle de connecteur c est dire le connecteur l appareil lui m me et non pas la prise murale doit avoir une configuration pour le branche ment avec une admission d appareil EN60320 IEC320 Pour USA et le Canada m Le cordon surmoul doit tre UL Certifi et CSA Certifi Les sp cifications minimales pour le cordon souple sont N
54. Eu SuperStack II Switch 1000 SE User Guide Agent Software Version 3 1 http www 3com com Document No DUA1690 OAAA05 Published June 1997 3Com Corporation m 5400 Bayfront Plaza m Santa Clara California m 95052 8145 Copyright 3Com Ireland 1997 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 3Com Ireland reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Ireland to provide notification of such revision or change 3Com Ireland provides this documentation without warranty of any kind either implied or expressed including but not limited to the implied warranties of merchantability and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time UNITED STATES GOVERNMENT LEGENDS If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following restricted rights For units of the Department of Defense Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii for Restricted Rights in Technical Da
55. FM has no effect Security Enable Disable When Security is enabled the port enters single address learning mode The Switch removes all addresses currently stored in the Switch Database against the port The Switch then learns the source address from the first packet it receives on the port since Security was enabled Once the first address is learnt no other endstation is permitted to access the network through the port If an endstation with a different address attempts to transmit packets onto the network through the port the port is automatically disabled and a trap is generated The port remains disabled until it is enabled from the Port Setup screen or via SNMP management A more comprehensive set of security features is available through SNMP network management Security is not available on backbone ports If the port has been defined as a backbone port the Security field is not displayed Setting Up the Switch Ports 4 13 Disable Interactive Access Yes No This field allows you to disable the Interactive Access feature of PACE Priority Access Control Enabled on the current port You should disable Interactive Access on a port if m The port is connected to a repeater The port is connected to a device with Interac tive Access enabled For more information about the Interactive Access feature refer to Setting Up the Switch Unit on page 4 9 VLT Mode Enable Disable This field allows you to
56. Fast Ethernet port amp status LEDs Plug in Module Unit status status LED LEDs port 25 only Figure 1 4 Switch 1000 front view 3C16901A top 3C16900A bottom 10BASE T Ports gt The Switch has 12 or 24 10BASE T RJ45 ports con figured as MDIX cross over which provide a full 10Mbps bandwidth to attached endstations The maximum segment length is 100m 328ft over cat egory 3 4 or 5 UTP cable 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 10BASE T ports in 3Com devices are MDIX only 100BASE TX Port LEDs The Switch has a single Fast Ethernet 100BASE TX RJ45 port configured as MDIX cross over which provides a 100Mbps connection to for example a local server The maximum segment length is 100m 328ft over category 5 UTP or STP cable As this port is 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 The table below describes the LED behavior on the Switch For more details about corrective action in the event of a problem refer to LEDs on page Gel LED Color Unit Overview Front Indicates TCVR Yellow Port Status LEDs Packet Status Yellow Green Green flashing Off Port 1 is a Transceiver Module fitted to the rear of the unit
57. IND REFRESH INSERT DELETE Figure 4 12 Unit Database View screen A listbox containing three fields Port The port ID for the entry MAC Address The MAC adaress for the port currently stored in the database Permanent Yes No Shows Yes if this entry is permanent or No if this entry is ageing or non ageing FIND This button lets you locate an entry in the database Refer to Searching the Switch Data base on page 4 18 REFRESH This button refreshes the database so that it displays the latest information CHAPTER 4 MANAGING THE SWITCH 1000 INSERT This button lets you insert an entry into the database You cannot insert an entry for a port which uses AutoSelect VLAN Mode DELETE This button allows you to delete entries from the database You cannot delete an entry if it is associated with a port which 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 MAC address is entered in the SDB In the MAC Address field type in the MAC address you are trying to locate Select FIND The port ID is displayed in the Port Number field and the entry in the listbox is high lighted with an asterisk By Port To locate the MAC addresses entered against a par ticular port ID in the SDB Clear the MAC Address field by moving into the field and press
58. MENT After Logging On When you have successfully logged on to the Switch the Main Menu screen is displayed as shown in Figure 3 3 From here you can select the options needed to manage the unit Refer to the screen map on page 4 1 If you have installed an ATM OC 3c Module into the Switch the Main Menu screen contains an ATM CONFIGURATION option Refer to the SuperStack II Switch ATM OC 3c Module User Guide for more information Access to options depends on the access level you have been assigned Access rights to the VT100 screens for the Switch are listed in Appendix B If you are a user with security access level and are using the management facility for the first time we suggest that you m Assign a new password for your user using the Edit User screen as described in Editing User Details on page 4 5 m Log on as each of the other default users and change their passwords using the Edit User screen m Create any new users in addition to the default ones To do this you assign each user a name password and security level as described in Cre ating a New User on page 4 3 SuperStack II Switch Hain Henu SWITCH MANAGEMENT USER ACCESS LEVELS STATUS MANAGEMENT SETUP SOFTWARE UPGRADE INITIALIZE RESET REMOTE POLL LOGOFF Figure 3 3 Main Menu screen Switch Management Setup The Management Setup screen allows you to con figure IP IPX and SLIP parameters
59. NE RTS CTS Unidirectional RTS CTS Bidirectional This field allows you to select the correct flow con trol option for your terminal or modem Refer to your terminal or modem documentation if you are unsure of the correct setting Auto Config Enabled Disabled The Switch can auto configure the line speed baud rate to work with your VT100 terminal This field allows you to specify whether auto configuration is enabled CHAPTER 4 MANAGING THE SWITCH 1000 Speed 1200 2400 4800 9600 19200 This field allows you to select the correct line speed baud rate for your terminal or modem If you have enabled auto configuration line speed is set automatically Char Size 8 This read only field shows the character bit data bit size for the Switch You should set your terminal to the same value Parity NONE This read only field shows the parity setting for the Switch You should configure your terminal to the same setting Stop Bit 7 This read only field shows the stop bit setting for the Switch You should configure your terminal to the same setting Resetting the Switch 4 27 Resetting the Switch SuperStack II Switch Reset If you suspect a problem with the Switch you can reset it This operation will reset the 1 From the Main Menu select the RESET option device Simulating a power cycle The Reset screen is displayed as shown in Figure 4 18 2 Select OK ok Resetting the Switch in this way
60. OC 3c Module port For more information refer to the SuperStack Il Switch ATM OC 3c Module User Guide AutoSelect The port uses AutoSelect VLAN Mode For more information about AutoSe lect VLAN Mode refer to Using AutoSelect VLAN Mode on page 5 3 For information about how to configure VLANS using AutoSe lect VLAN Mode refer to Setting Up VLANs Using AutoSelect VLAN Mode on page 5 11 VLAN Membership This field displays the ID of the VLAN s to which the port belongs Port ID 7 2 37 24 25 26 3C16900A 1 21 3J 12 13 14 3C16901A This field dis plays the ID of the port currently selected in the list box VLAN ID 7 2 3 16 If the port specified in the Port ID field uses Port VLAN Mode this field allows you to enter the ID of the VLAN to which the port is to be assigned If the port uses AutoSelect VLAN Mode you cannot specify the VLAN ID By default all ports use Port VLAN Mode and belong to the Default VLAN VLAN 1 This field is not displayed if the port is a VLT port If you are using AutoSelect VLAN Mode you cannot use 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 Virtual LANs VLANs 5 9 Backbone Port Yes No If the port specified in the Port ID field uses Port VLAN Mode this field allows you to specify whether the port is a
61. RP RFC 826 TFTP RFC 783 BOOTP RFC 951 F TECHNICAL SUPPORT 3Com provides easy access to technical support information through a variety of services This appendix describes these services Information contained in this appendix is correct at time of publication For the very latest we recom mend that you access 3Com Corporation s World Wide Web site Online Technical Services 3Com offers worldwide product support 24 hours a day 7 days a week through the following online systems a World Wide Web site m 3Com Bulletin Board Service 3ComBBS m 3ComFacts automated fax service a 3ComForum on CompuServe online service World Wide Web Site Access the latest networking information on 3Com Corporation s World Wide Web site by entering our URL into your Internet browser http www 3Com com This service features news and information about 3Com products customer service and support 3Com Corporation s latest news releases NetAge Magazine technical documentation and more 3Com Bulletin Board Service 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 Access by Analog Modem To reach the service by modem set your modem to 8 data bits no parity and 1 stop bit Call the telephone number nearest you Country Data Rate Telephone Number Australia up to 1440
62. Resilience screen Link State Available Not Available Not Present This read only field shows the connection state of the standby port m Available The port is operating normally m Not Available The resilient link pair is disabled m Not Present The port is not present in the cur rent hardware Standby Links Available This listbox shows the ports that you can configure as standby Pair State Active Both Failed Unknown Not Available This read only field shows the current operating state of the resilient link pair m Active The resilient link pair is enabled and operating normally with both main and standby port capable of carrying traffic m Both Failed Although the resilient link is cor rectly configured both links have failed This could be due to loose connections or cable dam age m Unknown The network configuration has changed and the resilient link pair no longer con forms to the rules m Not Available The resilient link pair is disabled Active Port Main Standby If a main link does not have a higher bandwidth than its standby link traf fic is not automatically switched back to the main link when it recovers Use this field to manually switch traffic back to the main link Pair Enable Enabled Disabled Use this field to enable or disable the resilient link pair Before you disable a resilient link pair you must remove cabling from the ports to avoid creating loops in your
63. S NOT EXIST OR WAS CAUSED BY CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO REPAIR OR MODIFY OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING OR OTHER HAZARD LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF ITS PRODUCTS EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE Some countries states or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential damages for certain products supplied to consumers or the limitation for personal injury so the above limitations and exclusions may be limited in their application to you This warranty gives you specifi
64. Select Enabled IPX Network Node Status Data Link Protocol 90356561 68664e6b99a5 Enabled Ethernet_862 3 86356562 68664e6b99a5 Enabled 4 Ethernet_862 2 90356563 686684e6b99a5 Enabled Ethernet_II 90060668 880042069925 Enabled Ethernet_SNAP OK SETUP TRAPS CONSOLE PORT Figure 3 4 Management Setup screen m CAM Contents Addressable Memory tests Console port tests m Internal packet forwarding tests m ASIC Application Specific Integrated Circuit tests a ASIC memory tests Switch Plug in Module interface test m Plug in Module packet forwarding tests m Plug in Module ASIC tests m Plug in Module ASIC memory tests If the field is set to Extended the Switch performs an Extended test which may take up to 70 seconds to complete When the Switch performs an Extended test it carries out the Fast Boot tests and more extensive tests on system memeory and ASIC memory The default setting for the field is Normal CHAPTER 3 SETTING UP FOR MANAGEMENT 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 on page 4 27 If you set the Switch to perform an Extended test the Switch must be disconnected from the rest of your network when it is powered up The Switch fails an Extended test if it receives any network traf fic during the test Device IP Address
65. able IFM on the port to which the repeater is connected Network Configuration Examples The following illustrations show some examples of how the Switch can be placed on your network Examples of how the Switch 1000 can be used in a VLAN based network are given in Chapter 5 Switch 1000 on Your Network 1 7 Network Segmentation This example shows how the Switch 1000 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 Switch 1000 fitted with Plug in a Module as a 10 100Mbps switch __ 10Mbps 10Mbps 10Mbps 10Mbps Switch 1000 fitted with Plug in EB Module as a 10 100Mbps switch a Susgeu 10Mbps 100Mbps 10Mbps repeater 100Mbps 100Mbps my Switch 3000 FX Figure 1 1 The Switch 1000 in a large corporate network 1 8 CHAPTER 1 GETTING STARTED Network Segmentation II This example shows the Switch 1000 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 Most of the switch ports have multiple endstations 10Mbps repeater Switch 1000 as a workgroup switch 10Mbps Fonts 10Mbps
66. ahead of other data when it arrives at the Switch The Implicit Class of Service feature minimizes latency through the Switch and protects the quality of multimedia traffic m Interactive Access When two way multimedia traffic passes over an Ethernet network interfer ence can occur because access to the bandwidth is unequally allocated to traffic in one direction The Interactive Access feature allocates the avail able bandwidth equally in both directions there fore increasing the quality of the traffic Interactive Access should only be enabled on ports that connect to a single endstation switch bridge or router You should disable Interactive Access on a port if it is connected to a repeater Also Interac tive Access should only be enabled at one end of the link For more information about disabling Interactive Access for a port refer to Setting Up the Switch Ports on page 4 12 VLAN Configuration Mode Port AutoSelect This field allows you to specify how ports on the Switch are placed in VLANs m Port The ports use Port VLAN Mode which means that they are manually placed in the required VLAN This is the default mode m AutoSelect The ports use AutoSelect VLAN Mode which means that they are automatically placed in the required VLAN by referring to a VLAN Server database in 3Com s Transcend Enterprise Manager software For more information refer to Using AutoSelect VLAN Mode on pag
67. ame This read only field shows the type of device sysName This field takes its name from the MIB Il System Group object You can edit the first 30 char acters of this field to make the name more mean ingful This name is displayed on the Main Banner when you first access the VT100 screens and is also accessible to an SNMP Network Manager Forwarding Mode Fast Forward Fragment Free Store and Forward Intelligent This field allows you to set the forwarding mode for the Switch m Fast Forward Frames are forwarded as soon as the destination address is received and verified The forwarding delay or latency for all frames in this mode is just 40us but with the lack of check ing time error frames are propagated onto the network m Fragment Free A minimum of 512 bits of the received frame is buffered prior to the frame being forwarded This ensures that collision frag ments are not propagated through the network The forwarding delay or latency for all frames in this mode is 64us Setting Up the Switch Unit 4 9 SuperStack II Switch Unit Setup Unit Name Switch 1888 sysName Max 36 chars Switch 1088 Forwarding Mode Fast Forward Intelligent Forwarding N A PACE Disable ULAN Configuration Mode Port Bridging Mode Forward To Backbone SDB Ageing Time HH MM 9 36 Spanning Tree Disable Duplex Mode Half Duplex Backbone Port 25 Default RMON Host Hatrix Disable Plug in Module T
68. ame VLAN as the source port Refer to Setting Up the Switch Unit on page 4 9 for more informa tion CHAPTER 1 GETTING STARTED To best suit your networking requirements the Switch 1000 allows you to select one of four frame forwarding modes m Fast Forward Frames are forwarded as soon as the destination address is received and verified The forwarding delay or latency for all frames in this mode is just 40us but with the lack of checking time any error frames received are prop agated through the switch m Fragment Free A minimum of 64 bytes of the received frame is buffered prior to the frame being forwarded This ensures that collision frag ments are not propagated through the network The forwarding delay or latency for all frames in this mode is 64us m Store and Forward Received packets are buff ered in their entirety prior to forwarding This ensures that only good frames are passed to their destination The forwarding delay for this mode varies between 64us and 1 2ms depending on frame length In Store and Forward mode latency is measured as the time between receiving the last bit of the frame and transmitting the first bit For the Switch 1000 this is 8ps a Intelligent The Switch monitors the amount of error traffic on the network and changes the forwarding mode accordingly If the Switch detects less than 18 errors a second it operates in Fast Forward mode If the Switch detects 18 o
69. anagement 1 4 1 6 Intelligent Flow Management field 4 12 Intelligent Forwarding field 4 9 Intelligent Switching Mode 1 4 Interactive Access disabling 4 13 IP address default router 3 10 device 3 10 entering 1 15 format 3 2 IP or IPX Address field 4 24 IP protocol 1 14 IPX address 1 15 IPX Network field 3 10 IPX protocol 1 14 K keyboard shortcuts 3 5 L LEDs 1 11 line speed 4 26 Link State field 4 20 Local Security screen 4 6 logging off 3 12 logging on 3 7 Logon screen 3 7 Lost Links field 4 12 M MAC Address field 3 9 4 17 MAC address label 1 13 Main Banner screen 3 6 Main Menu screen 3 8 MAIN Port field 4 22 Main Port ID field 4 20 management agent version number 6 8 Management Level field 4 7 Management Setup screen 3 9 Matrix RMON group 5 24 Max Age 5 15 Max Age field 5 18 N network configuration examples 1 6 network supplier support F 3 New Password field 4 5 Node field 3 10 non ageing entries 4 16 non routable protocols limitation for VLAN based networks 5 5 O Old Password field 4 5 on line technical services F 1 P PACE 1 6 disabling Interactive Access for a port 4 13 PACE field 4 10 packets processing 1 3 Pair Enable field 4 21 4 23 Pair State field 4 20 4 22 Parity field 4 26 Password field 3 7 4 3 passwords changing 4 5 default 3 7 forgetting 4 5 Path Cost field 5 21 path costs default 5 14 permanent entries 4 16 displaying 4 17 specifyin
70. anges in counters over a short period of time This button does not clear the counters on the device or affect counters at the network management workstation CHAPTER 6 STATUS MONITORING AND STATISTICS Port Error Analysis With the Port Statistics screen displayed select the ERROR ANALYSIS button The Port Error Analysis screen is displayed as shown in Figure 6 4 The Port Error Analysis screen shows the following Port ID The ID of the port you are currently manag ing CRC Align Errors This counter is incremented by one for each frame with a CRC Cyclic Redundancy Check error or an alignment error A CRC error occurs if a frame of valid length has an invalid CRC but does not have a framing error It is likely that a bit has been corrupted in transmission An align ment error occurs if a frame has a CRC error and the frame does not have an integral number of octets Alignment errors may be caused by a fault at the transmitting device Check cables and connections for damage If this does not solve the problem try changing the trans ceiver or adapter card of the device connected to the port at the source of the problem 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 Ethernet frames They may indicate externally generated noise causing problems on the network Check the
71. art and authentication failure RMON adds two more rising threshold and falling threshold Effective use of the Events group saves you time rather than having to watch real time graphs for important occurrences you can depend on the Event group for notification Through the SNMP traps events can trigger other actions providing a mechanism for an automated response to certain occurrences Benefits of RMON Using the RMON features of your Switch has three main advantages m lt improves your efficiency m lt allows you to manage your network in a more proactive manner m It reduces the load on the network and the man agement workstation How RMON Improves Your Efficiency Using RMON probes allows you to remain at one workstation and collect information from widely dis persed LAN segments or VLANs This means that the time taken to reach a problem site set up equip ment and begin collecting information is largely eliminated How RMON Allows Proactive Management If they are configured correctly RMON probes deliver information before problems occur This means that you can take action before they impact on users In addition probes record the behavior of your network so that you can analyze the causes of problems How RMON Reduces the Traffic Load Traditional network management involves a man agement workstation polling network devices at regular intervals to gather statistics and identify problems or trends
72. ated Root Designated Bridge Forwarding FFFF 68664e6a4af2 FFFF 68664e6747c9 Designated Port 80 61 Designated Cost 8 Fud Transitions 2 Refer to the User Guide before changing the settings of these parameters Path Cost Port Enable Enable Priority 128 768 Fast Start Disable ok Figure 5 17 Port STP screen m Blocking A port in this state does not forward packets to prevent more than one active path existing on the network The port is included in STP calculations and BPDUs can be transmitted received and processed m 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 a Forwarding A port in this state can forward packets BPDUs can also be received and pro cessed Designated Port This read only field shows the ID of the Designated Bridge Port for the current port s segment Designated Root This read only field shows the Bridge Identifier of the Root Bridge Designated Cost This read only field shows the path cost from the Root Bridge to the Designated Bridge Port for the current port s segment Designated Bridge This read only field shows the Bridge Identifier of the Designated Bridge for the current port s segment Fwd Tran
73. ay find other codings for the respective connections Connect the power supply wires from the unit according to the fol lowing scheme Brown wire to the Live Line plug terminal which may be marked with the letter L or col ored red a Blue wire to the Neutral plug terminal which may be marked with the letter N or colored black Yellow green wire to the Earth Ground plug terminal which may be marked with the letter E or the earth symbol or colored green yel low This unit operates under SELV conditions Safety Extra Low Voltage according to IEC 950 the conditions of which are maintained only if the equipment to which it is connected is also opera tional under SELV The unit should never be connected to an A C outlet power supply without an Earth Ground connection To comply with European safety standards a spare fuse must not be fitted to the appliance inlet Only fuses of the same manufacturer make and type should be used with the unit Ensure that the power supply lead is discon nected before opening the IEC connector fuse cover or removing the cover of the unit France and Peru only This unit cannot be powered from IT imped ance a la terre supplies If your supplies are of the IT type this unit should be powered by 230V 2P T via an isolation transformer ratio 1 1 with the secondary connection point labelled Neutral connected directly to Earth Ground U K only The Switch 10
74. belsatz mu mit den Bestimmun gen des Landes bereinstimmen in dem er ver wendet werden soll m Die Anordnung der Ger tsteckvorrichtung d h die Steckverbindung am Ger t selbst im Gegen satz zum Wandstecker mu in den EN60320 IEC320 Zuf hrungsstecker am Ger t passen Wichtige Sicherheitsinformationen A 7 Es ist wichtig da der Netzstecker sich in unmit telbarer N he zum Ger t befindet und leicht erre ichbar ist Das Ger t kann nur durch Herausziehen des Verbindungssteckers aus der Steckdose vom Stromnetz getrennt werden Das Ger t wird mit Sicherheits Kleinspannung nach IEC 950 SELV Safety Extra Low Voltage betrieben Angeschlo en werden k nnen nur Ger te die ebenfalls nach SELV betrieben wer den Das Ger t ist unter keinen Umst nden an einen Wechselstrom A C Netzstecker anzuschlie en ohne Erdungsleitung Um bereinstimmung mit den europ ischen Sicherheitsnormen zu gew hrleisten darf am Zuf hrungstecker des Ger tes keine Ersatzsicherung angebracht werden Nur Sicherungen der gleichen Herstellung und Marke sowie des gleichen Typs f r das Ger t verwenden Vorm ffnen der Abdeckungsklappe der IEC Steckverbindungssicherung oder vorm Abneh men der Gesamtabdeckung der Ger t sicher stellen da das Stromverbindungskabel vom Netzstrom getrennt ist Die Austastplatten der Plug in Module oder Sendeempf nger Module nicht entfernen solange die Einheit ans Stromnetz angeschlossen is
75. c legal rights which may vary depending on local law GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of California 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95052 8145 1 408 764 5000 9 1 96 ELECTRO MAGNETIC COMPATIBILITY 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 Cet appareil num rique de la classe A respecte toutes les exigences du Reglement sur le mat riel brouilleur du Canada VCCI STATEMENT CORB ALBARUEER ESMANETOMRLAMMICSUTH BENZNEHHNERE TEERBTORKREEN LEBEN LER KESERBSFBERHHBES VCOC BEKBSLTEU amp ET LOL RA EESUA FLEYSVREMKERLTIBAH RSL amp EBEFORRERZIENBUET RRRABCHOTELURVY RYE LORE INFORMATION TO THE USER If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures a Reorient the receiving antenna a Relocate the equipment with respect to the receiver a Move
76. ch 1000 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 Hub units the Switch 1000 unit must be installed below the narrower Hub units This unit must be earthed Connect the unit to an earthed power supply to ensure compliance with European safety stan dards The power cord set must be approved for the country where it will be used The appliance coupler that is the connector to the device itself and not the wall plug must have a configuration for mating with an EN60320 IEC320 appliance inlet For U S A and Canada a The cord set must be UL approved and CSA certified a The minimum specification for the flexible cord is No 18 AWG Type SV or SJ 3 conductor a The cord set must have a rated current capac ity of at least 10A a The attachment plug must be an earth grounding type with a NEMA 5 15P 15A 125V or NEMA 6 15P 15A 250V con figuration For Denmark a The supply plug must comply with section 107 2 D1 standard sheet DK2 1a or DK2 5a For Switzerland a The supply plug must comply with SEV ASE 1011 APPENDIX A SAFETY INFORMATION It is essential that the mains socket outlet is installed near to the unit and is accessible You can only disconnect the unit by removing the appliance coupler from the unit If the power supply plug is unsuitable and you have to replace it you m
77. ch Database To access the Unit Database View screen display the Switch Management screen choose the manage ment 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 The data base holds a maximum of 500 addresses MAC Address If you highlight an entry in the list box and press Return this field shows the MAC address for the entry Port Number If you highlight an entry in the list box this field shows the port identifier for the entry Permanent Yes No This field allows you to specify that the current entry is permanent Refer to the previous section Setting Up the Switch Database SDB for a description of permanent and ageing entries You cannot specify that the current entry is perma nent if the port uses AutoSelect VLAN Mode For more information about AutoSelect VLAN Mode refer to Using AutoSelect VLAN Mode on page 5 3 Setting Up the Switch Database SDB SuperStack II Switch Unit Database View Port MAC Address Permanent 18 68664e 684901 No Database Entries 19 18 888 65Fd23235 No 18 686662657253 No 18 08 004e 086338 No 18 080848 0855ca No 18 68 664e 853cdb No 18 0880848165377 No MAC Address 18 6626af436438 No 18 68 664e dahaf2 No Port Number 18 880848 0747c9 No 18 68664e6c9d1f No Permanent 4 No 18 68664e8bcbc8 No F
78. ch device link Dis abling Interactive Access for a Switch port as described in Setting Up the Switch Ports on page 4 12 You have configured a Switch port so that it blips when a broadcast storm occurs but the port does not blip properly The broadcast storms are occurring such that the average broadcast bandwidth cannot drop below the Falling Threshold value This means that the blip only occurs once Try changing the following attributes in the Broad cast Storm Control section of the Port Setup screen m Rising Action to disable port notify m Falling Action to event enable For more information refer to Setting Up the Switch Ports on page 4 12 APPENDIX C TROUBLE SHOOTING You have added the Switch 1000 to an already busy network and response times and traffic levels have increased You may have added a group of users to one of the Switch 1000 ports via a repeater or switch and not turned off IFM Turn off IFM on any port that is con nected to multiple devices Refer to Setting Up the Switch Ports on page 4 12 You have connected an endstation directly to the Switch and the endstation fails to boot cor rectly The Switch has STP enabled and the endstation is booting before the STP initialization process is com plete Specify that the port has Fast Start enabled and then reboot the endstation For more informa tion about specifying Fast Start for a port refer to Confi
79. counters at the network management workstation Port Error Analysis CHAPTER 6 STATUS MONITORING AND STATISTICS Status Monitoring The status screen provides read only information about the Switch 1000 This information may be useful for your Technical Support representative if you have a problem To access the screen from the Main Menu select the STATUS option The Status screen is displayed as shown in Figure 6 5 The Status screen shows the following 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 Last Reset Type Other Command Watchdog Power reset System error This field indicates the cause of the last reset It may be due to manage ment command watchdog timeout expiry power interruption a manual reset or a system error Hardware Version The hardware version number of the Switch Upgradable Software Version The version number of the agent software image stored in Flash EPROM This version number is automatically updated when you download new software SuperStack II Switch Status System Up Time 31 Minutes 3 Seconds Number of Resets 2 Last Reset Type Other Version Numbers Harduare Version 3 Upgradable Software Version 3 18 Boot Software Version 2 18 FAULT LOG
80. cting a Redundant Power System RPS You can connect a SuperStack II Redundant Power System RPS to the Switch At 5V the current requirement for the Switch is 4 8A including any Transceiver Module that might be fitted but excluding a Plug in Module Check the documentation supplied with your Plug in Module for power consumption figures For most configurations you need only one Super stack Il RPS output and this can be connected to either of the two sockets on the rear of the unit If the current consumption of the Switch plus any Plug in Module exceeds the capability of the RPS 8 5A you need a SuperStack Il Advanced RPS with one Advanced RPS 100W Module If the RPS is used incorrectly its Output Fault LED lights yellow You should check the documentation supplied with the RPS or Advanced RPS to see if the outputs can be used in parallel Connecting Equipment to the Console Port The Switch console port settings are set to 8 data bits m no parity 1 stop bit The terminal connected to the console port on the Switch must be configured with the same settings This procedure is described in the documentation supplied with the terminal If you have enabled auto configuration for the Switch the terminal s line speed baud rate is detected automatically Connection to the console port can be direct for local management or through a modem for remote management The maximum baud rate the auto configuration
81. d 5 26 probe 5 22 Root Bridge 5 14 Root Cost field 5 18 Root Path Cost 5 14 Root Port field 5 19 RPS 1 13 connecting 2 6 S safety information English A 1 French A 4 German A 7 screens 4 1 access rights B 1 Auto Logout 3 12 Console Port Setup 4 25 Create User 4 3 Delete Users 4 4 Edit User 4 5 Fault Log 6 9 Initialization 4 28 Local Security 4 6 Logon 3 7 Main Banner 3 6 Main Menu 3 8 Management Setup 3 9 Port Error Analysis 6 6 Port Resilience 4 20 Port Setup 4 12 Port Statistics 6 3 Port STP 5 20 Port Traffic Statistics 6 4 Remote Poll 6 10 Reset 4 27 Software Upgrade 4 29 Status 6 8 Summary Statistics 6 2 Switch Management 4 7 Trap Setup 4 24 Unit Database View 4 17 Unit Resilience Summary 4 22 Unit Setup 4 9 User Access Levels 4 2 VLAN Server 5 11 VLAN Setup 5 8 VLAN STP 5 18 SDB Ageing Time field 4 11 security 1 5 Security field 4 13 serial number location on unit 1 13 serial port See console port Server Address field 4 29 servers connecting 1 6 SLIP Address field 3 10 SLIP Subnet Mask field 3 10 SNMP 1 14 3 6 Community 4 6 quick start 1 15 socket power 1 13 RPS 1 13 Software Upgrade screen 4 29 software version number 6 8 Spanning Tree field 4 11 Spanning Tree Protocol See STP specifications system E 1 Speed field 4 26 standards supported E 2 Standby Links Available field 4 20 STANDBY Port field 4 22 Standby Port ID field 4 20 statistics 6 1 counters See counters port 6 3
82. d allows you to enter a community string for the user gt 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 4 6 CHAPTER 4 MANAGING THE SWITCH 1000 Assigning Local Security The Local Security screen shows a matrix of options for access method Console 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 Secu rity screen is displayed as shown in Figure 4 6 2 Fill in the fields as required 3 When you have filled in the form select OK Access options are Console Port Enabled Disabled To prevent access to the management facilities via the console port disable access to the facility for each access level Console port access for Security is enabled and cannot be changed This prevents accidental dis abling of all access levels from management Remote Telnet Enabled Disabled Telnet is an inse cure protocol 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 You may want to disable all access to the man age
83. d fully tighten with a suit able screwdriver 4 Repeat steps 2 and 3 for the other side of the unit 5 Insert the unit into the 19 inch rack and secure with suitable screws not provided Ensure that ventila tion holes are not obstructed 6 Connect network cabling Stacking the Switch and Other Units If the units are free standing up to four units can be placed on top of one another If mixing a variety of SuperStack Il Switch and Hub units the smaller units must be positioned at the top The Switch is supplied with four self adhesive rubber pads Apply the pads to the underside of the unit stick one in the marked area at each corner of the unit Place the units on top of each other ensuring that the pads of the upper unit line up with the recesses of the lower unit Wall Mounting A A single Switch can be wall mounted CAUTION Disconnect any cables from the unit before continuing Remove self adhesive pads from the underside of the unit if they have been previ ously 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 holes on one side of the unit as shown in Figure 2 3 Insert the two screws and tighten with a suitable screwdriver Repeat for the other side of the unit Ensure that the wall you are going to use is smooth flat dry and sturdy Attach a piece of plywood approximately 305mm x 510mm x 12mm 12i
84. d to detect changes in traffic and error patterns in critical areas of your network History The History group provides historical views of net work performance by taking periodic samples of the counters supplied by the Statistics group The group features user defined sample intervals and bucket counters for complete customization of trend analysis The group is useful for analysis of traffic patterns and trends on a LAN segment or VLAN and to establish baseline information indicating normal operating parameters Alarms The Alarms group provides a versatile general mechanism for setting thresholds and sampling intervals to generate events on any RMON variable 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 Hosts The Hosts group specifies a table of traffic and error statistics for each host on a LAN segment or VLAN Statistics include packets sent and received octets sent and received as well as broadcasts mul ticasts and error packets sent The group supplies a simple discovery mechanism listing all hosts that have transmitted The next group Hosts Top N requires implementation of the Hosts group Hosts Top N The Ho
85. detected for two min utes Otherwise set the Active Port setting in the Port Resilience screen described on page 4 20 to Main to manually switch traffic back m Both Failed Both ports of the resilient link pair have failed This could be due to loose connec tions or cable damage Pair Enable Enabled Disabled This read only field displays whether the resilient link pair is currently enabled or disabled You enable or disable a resilient link pair using the Port Resilience screen described in Configuring Resilient Links on page 4 20 OK This button allows you to access the Port Resil ience screen for the current resilient link pair Setting Up Resilient Links CHAPTER 4 MANAGING THE SWITCH 1000 Setting Up Traps gt Traps are messages sent across the network to an SNMP Network Manager They alert the network administrator to faults or changes at the Switch device Your Network Manager may automatically set up traps in the Switch Trap Table Check the documen tation accompanying your network management software To access the Trap Setup screen select the SETUP TRAPS button from the Management Setup screen described in Chapter 3 The Trap Setup screen is shown in Figure 4 16 The screen shows the following IP or IPX Address This field allows you to enter the IP or IPX address of the remote network manage ment stations to which traps should be sent Community String This field allows
86. e 971 4 349049 45 39 27 85 00 358 0 435 420 67 47 22 18 40 03 46 8 632 56 00 007 095 2580940 27 11 807 4397 44 131 2478558 Edinburgh 44 161 8737717 Manchester 44 1628 897000 Marlow Location Telephone Number Fax Number Returning Products for Repair Before you send a product directly to 3Com for repair you must first be 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 To obtain an RMA number call or fax U S A and Canada Latin America Europe South Africa and Middle East Elsewhere 02 06 97 1 800 876 3266 option 2 1 408 326 7801 44 1442 438125 1 408 326 7804 408 764 7120 408 764 7120 44 1442 435822 1 408 764 7120 GLOSSARY 10BASE T The IEEE 802 3 specification for Ethernet over Unshielded Twisted Pair UTP cabling 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 ATM Asynchronous Transfer Mode A connection ori ented transmission protocol based on fixed length cells packets ATM is designed to carry a complete range of user traffic including voice data and video signals backbone The part of a network used as the
87. e 5 3 Bridging Mode Forward To All Forward To Back bone This field allows you to set the bridging mode which controls how packets with unknown addresses are processed m Forward To All The Switch forwards packets with an unknown address to all ports in the same VLAN as the source port This setting should only be used if your network has less than 500 MAC addresses m Forward To Backbone The Switch forwards packets with an unknown address to the back bone port defined for the VLAN of the source port This is the default setting For more information about VLANs and backbone ports refer to Virtual LANs VLANSs on page 5 1 SDB Ageing Time This field allows you to specify the ageing time hours minutes for all non perma nent entries in the Switch Database of the unit You can set an ageing time in the range O minutes to 277 hours with a default of 30 minutes If you enter 0 00 ageing is turned off For more informa tion about ageing times refer to Setting Up the Switch Database SDB on page 4 16 Spanning Tree Enable Disable This field allows you to enable or disable the Spanning Tree Protocol STP on the Switch For more information about STP refer to Spanning Tree Protocol on page 5 12 Duplex Mode Half Duplex Full Duplex on 100M Ports Full Duplex on all Ports This field allows you to set the duplex mode of ports that have Unit Default specified in the Duplex Mode field o
88. e only recommendations Viewing statistics on a regular basis allows you to see how well your network is performing If you keep simple daily records you will see trends emerg ing and notice problems arising before they cause major network faults This way statistics can also help you get the best out of your network 6 2 CHAPTER 6 STATUS MONITORING AND STATISTICS SuperStack II Switch Summary Statistics Summary Statistics With the Switch Management screen displayed CRE ie choose the management level Unit then select the Port Be o STATISTICS button The Summary Statistics screen is eae D Port 12 o displayed as shown in Figure 6 1 Eee m Pore 46 o Port 17 8 Port 18 8 2 Port 19 8 Port 28 6 Port 21 8 Port 22 8 The Summary Statistics screen lists values for the a 5 RUSSE ons current counter against every port on the Switch Hadeta Hot Frec nt TasBase Tal sjr 1156 1000 and it is refreshed approximately every two seconds Once values have reached approximately FRAMES RECEIVED CLEAR SCREEN COUNTERS 4 000 000 000 they are reset to zero To view values for a particular counter select the Figure 6 1 Sumrmary Statistics screen N first button displayed at the foot of the Summary Statistics screen Pressing the spacebar toggles FRAMES FILTERED Displays the total number of through the available counters and as soon as you frames that were filtered because the destination move away from the but
89. e restricted to particular users The Switch can support up to four management user sessions concurrently for example one console port and three Telnet connections SETTING UP FOR MANAGEMENT You can establish VT100 management communica tion with the Switch through two different inter faces m Via the Console Port You can access the local management interface using a VT100 termi nal or PC using suitable terminal emulation soft ware The terminal can be connected directly to the Switch or through a modem You can also connect a management workstation running SLIP to the console port which allows you to use out of band Telnet The workstation can be con nected directly or remotely through a modem This method provides a way of managing the Switch in situations where the LAN is not provid ing a reliable service where the Network Man ager does not have direct LAN connectivity or when a Network Manager does not support SNMP m Via a Network Connection The local man agement facility is also accessible via Telnet over a network running the TCP IP protocol The man agement available through Telnet is exactly the same as that of a locally connected terminal The Telnet application requires a VT100 terminal or PC using suitable terminal emulation software 3 2 CHAPTER 3 SETTING UP FOR MANAGEMENT Using Telnet Any Telnet facility that emulates a VT100 terminal should be able to communicate with the Switch ove
90. elnet or terminal emulation software before using the Control keys 3 6 CHAPTER 3 SETTING UP FOR MANAGEMENT Setting Up the Switch for Management The following sections describe how to get started if you want to use an SNMP Network Manager to manage the Switch It assumes you are already familiar with SNMP management If not we recom mend the following publication The Simple Book by Marshall T Rose ISBN 0 13 812611 9 Published by Prentice Hall m f you are using IP and you have a BOOTP server set up correctly on your network the IP address for the Switch is detected automatically and you can start managing the Switch without any fur ther configuration m f 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 m f you are using IP without a BOOTP server you must enter the IP address of the Switch before the SNMP Network Manager can communicate with the device To do this take the following steps SuperStack II Switch SSSS U U PPPP EEEEE RRRR SSSS TTTTT AAA cece K K III III s S T K I up A ac K sss U U PPPP EEEE RRRR SSS T AAAAA C KKK I I su UP E R R T A ac K K I SSSS uuu P EEEEE R R SSSS T A A cece K K III III Switch 1888 Press Enter to Continue Figure 3 1 Main Banner 1 At your terminal press Return two or more times until the Switch 1000 Main Banner is displayed sh
91. end the VLANs you have defined in your existing network into an ATM network For more information refer to the SuperStack Il Switch ATM OC 3c Module User Guide VLAN Configurations p You can set up VLAN configurations more easily if you use 3Com s Transcend Enterprise Manager appli cations for all the management tasks Virtual LANs VLANs 5 5 Example 1 The example shown in Figure 5 5 illustrates a simple VLAN configuration with a single Switch 1000 whose ports are divided between two VLANs VLAN 1 is able to talk to VLAN 2 using the connec tion between each VLAN and the router To set up this configuration Use the VT100 screens or VLAN Server database to a Place ports 1 6 and 13 18 in VLAN 1 b Place ports 7 12 and 19 24 in VLAN 2 2 Connect a port in VLAN 1 to the router 3 Connect a port in VLAN 2 to the router Connection Connection for VLAN 1 for VLAN 2 Figure 5 5 VLAN configuration with a single Switch 1000 unit 5 6 CHAPTER 5 ADVANCED MANAGEMENT Example 2 The example shown in Figure 5 6 illustrates two VLANs spanning two Switch 1000 units VLAN 1 is Backbone port connection able to talk to VLAN 2 using the connection SE a between each VLAN and the router Ports within the EN server 1 same VLAN but on different Switches communicate nz using the VLT ed Server 2 in VLAN 1 To set up this configuration 1 Use the VT100 screens or VLAN Server database to Connection Co
92. entiate types of information the VT100 screens use the following conventions Type of Shown on screen Description information as Choice Field texte 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 A text entry field allows you to enter text numeric data or hexadecimal data from the keyboard Password fields are hidden which means that the text you type is not shown on the screen In some cases a text entry field has a default entry If you wish to replace the default simply enter a new value for this field the default entry is erased Press Down Arrow or Return to move to the next field Button OK Text for a button is always shown in uppercase letters A button carries out an action for example OK or CANCEL To operate a button move the cursor to the button and press Return List Box monitor A list box allows you to select one or more items from a list There are several keys that allow you to use a list box manager a Return moves the cursor to the next field and actions your selections security m Space toggles through the options in a choice field or selects and deselects an entry in the list box List box selections are highlighted a Down Arrow moves item by item down the list box until it
93. er screen shows the following fields User Name Type in the name of this new user The name can consist of up to 10 characters and is case sensitive Password Type in the password for this new user The password can consist of up to 10 characters and is case sensitive For security reasons the pass word is not displayed on screen Access Level Assign an access level for this new user as follows m monitor access to view but not change a subset of the manageable parameters of the Switch m secure monitor as monitor m manager access to all the manageable param eters of the Switch except security features Creating a New User 4 3 SuperStack II Switch Create User User Name Password 1 Access Level Monitor Community String 1 OK CANCEL Figure 4 3 Create User screen m specialist as manager m security access to all manageable parameters of the Switch 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 If you are using a remote SNMP Network Manager the community string specified in the Net work Manager s database must be the same as that for the device gt If you enter a community string that is greater than 32 characters it is truncated to 32 characters 4 4 CHAPTER 4 MANAGING THE SWITCH 1000
94. ercentage of all frames received by the port A sampling period of one minute is used Broadcast Frame Bandwidth This counter provides a running average of the broadcast frame band width used by the port expressed as a percentage of the maximum bandwidth available for the port A sampling period of five seconds is used Error Frames This counter provides a running aver age of the number of errors per 10 000 frames received by the port expressed as a percentage Refer to the field description for Errors on page 6 5 TRAFFIC STATISTICS Select this button to access traffic counters for this port ERROR ANALYSIS Select this button to access error counters for this port 6 4 CHAPTER 6 STATUS MONITORING AND STATISTICS Port Traffic Statisti cs SuperStack II Switch Port Traffic Statistics With the Port Statistics screen displayed select the ass c TRAFFIC STATISTICS button The Port Traffic Statistics mil De ee ee screen is displayed as shown in Figure 6 3 Multicasts Received 3214 collisions 7 Broadcasts Received 266882 Fragments 38 The Port Traffic Statistics screen shows the follow See 26770 si 2 Ing Frame Size Analysis 64 Octets 1 256 to 511 Octets 73 Port ID The ID of the port you are currently manag 128 to 265 octets 2 Te2u to 1518 octets 0 Ing CLEAR SCREEN COUNTERS Frames Received The number of valid frames received by the port including fragments and frames with errors Figure 6 3
95. erminal connecting 2 7 Throttle field 4 24 5 11 time since reset 6 8 Time Since Topology Change field 5 19 Topology Changes field 5 18 Transceiver Module 1 2 1 13 Transceiver Module Type field 4 11 Trap Setup screen 4 24 traps community strings 4 24 setting up 4 24 throttle 4 24 trouble shooting C 1 Type field 5 8 U Unit Database View screen 4 17 Unit Name field 4 9 Unit Resilience Summary screen 4 22 Unit Setup screen 4 9 upgradable software version number 6 8 upgrading software 4 29 URL F 1 User Access Levels screen 4 2 User Name field 3 7 4 3 users access levels 4 6 changing names 4 5 creating 4 3 default 3 7 deleting 4 4 editing 4 5 setting up 4 2 V 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 14 VLAN ID field 5 9 5 18 VLAN Membership field 5 9 VLAN server 5 3 VLAN Server Community String field 5 11 VLAN Server IP Address field 5 11 VLAN Server screen 5 11 VLAN Setup screen 5 8 VLAN STP screen 5 18 VLANs 1 5 5 1 assigning ports 5 10 AutoSelect VLAN Mode 5 3 Default 5 3 5 9 extending into an ATM network 5 5 Port VLAN Mode 5 3 setting up 5 8 using non routable protocols 5 5 using unique MAC addresses 5 5 VUS 5 8 VLT Mode field 4 13 VLTs 5 3 5 8 VT100 interface accessing 3 1 definition 1 14 logging on 3 7 navigating 3 4 VT100 terminal connecting 2 7 W wall mo
96. etwork operation The following sections explain more about the con cept of VLANs and explain how they can be imple mented on the Switch 1000 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 This means that LAN segments are not restricted by the hard ware which physically connects them the segments are defined by flexible user groups that you create using software ADVANCED MANAGEMENT With VLANs you can define your network according to m Departmental groups For example you can have one VLAN for the Marketing department another for the Finance department and another for the Development department Hierarchical groups For example you can have one VLAN for directors another for manag ers and another for general staff m Usage Groups For example you can have one VLAN for users of e mail and another for users of multimedia Benefits of VLANs Implementing VLANs on your network has three main advantages m It eases the change and movement of devices on IP networks m It helps to control broadcast traffic m It provides extra security CHAPTER 5 ADVANCED MANAGEMENT How VLANs Ease Change and Movement With traditional IP networks network administra tors spend much of their time dealing with moves and changes If users move to a different IP subnet the IP addresses of each endstation
97. f the Port Setup screen The default setting is Half Duplex For more information about Duplex Mode refer to Setting Up the Switch Ports on page 4 12 Backbone Port 7 2 3 24 25 26 3C16900A 1 2 37 12 13 14 3C16901A If the Bridging Mode field is set to Forward to Back bone and all the ports on the Switch belong to VLAN 1 and use Port VLAN Mode then this field allows you to specify a backbone port for the Switch In all other situations the field is not dis played On a new or initialized Switch all ports belong to VLAN 7 and use Port VLAN Mode Setting Up the Switch Unit 4 11 For more information about VLANs refer to Vir tual LANs VLANs on page 5 1 For more informa tion about backbone ports and their role in VLAN functionality refer to Setting Up VLANs on the Switch on page 5 8 Default RMON Host Matrix Enable Disable This field allows you to enable start Hosts and Matrix RMON sessions on the Default VLAN or disable stop existing sessions if they are no longer required The default setting for this field is Disable For more information about RMON sessions refer to RMON on page 5 22 Plug in Module Type This read only field displays the type of Plug in Module fitted to the rear of the unit or displays Not Fitted Transceiver Module Type This read only field shows the type of Transceiver Module fitted to the rear of the unit or displays Not Fitted
98. f the case is not restricted We recom mend that you provide a minimum 25mm 1in clearance No objects are placed on top of the unit Units are not stacked more than four high if free standing CHAPTER 2 INSTALLATION AND SETUP Configuration Rules for Fast Ethernet The topology rules for 100Mbps Fast Ethernet are slightly different to those for 10Mbps Ethernet Figure 2 1 illustrates the key topology rules and pro vides examples of how they allow for large scale Fast Ethernet networks The key topology rules are m Maximum UTP cable length is 100m 328ft over category 5 cable m A 412m 1352ft fiber run is allowed for connect ing switch to switch or endstation to switch using half duplex 100BASE FX m A total network span of 325m 1066ft is allowed in single repeater topologies one hub stack per wiring closet with a fiber run to the collapsed backbone For example a 225m 738ft fiber downlink from a repeater to a router or switch plus 100m 328ft UTP run from a repeater out to the endstations Configuration Rules with Full Duplex The Switch provides full duplex support for all its fixed Ethernet and Fast Ethernet ports and Fast Ethernet Plug in Module ports Full duplex allows frames to be transmitted and received simulta neously and in effect doubles the potential throughput of a link With full duplex the Ethernet topology rules are the same but the Fast Ethernet rules are m Maxim
99. fer to Setting Up the Switch Unit and Setting Up the Switch Ports in Chapter 4 Security The Switch 1000 contains advanced security fea tures which guard against users connecting unau thorized endstations to your network When security is enabled on a port it enters single address learn ing mode In this mode the port learns a single Ethernet address once this is learned the port is disabled if a different address is seen on the port Until security is disabled no other address can be learned For more information about security refer to Set ting Up the Switch Ports on page 4 12 Resilient Links The Resilient Link feature in the Switch 1000 enables you to protect critical links and prevent net work downtime should those links fail Setting up resilience ensures that should a main communication link fail a standby duplicate link immediately and automatically takes over the task of the main link Each main and standby link pair is referred to as a resilient link pair For more information about resilient links refer to Setting Up Resilient Links on page 4 19 About the Switch 1000 1 5 Virtual LANs The Switch 1000 has a Virtual LAN VLAN feature which allows you to build your network segments without being restricted by physical connections A VLAN is defined as a group of location and topology independent devices that communicate as if they are on the same physical LAN Imp
100. g 4 17 4 18 pin assignments modem cable D 2 null modem cable D 1 RJ45 D 2 serial cable D 1 pin outs D 1 Plug in Module 1 2 1 13 Plug in Module Type field 4 11 Poll Period field 5 11 port 100BASE TX 1 2 1 11 10BASE T 1 2 1 11 backbone 1 2 5 8 5 9 0 console 1 13 enabling and disabling 4 12 speed 4 12 state 4 12 statistics 6 3 Port Error Analysis screen 6 6 Port Number field 4 17 Port Resilience screen 4 20 Port Setup screen 4 12 Port Speed field 4 12 Port State field 4 12 Port Statistics screen 6 3 Port STP screen 5 20 Port Traffic Statistics screen 6 4 Port VLAN Mode 5 3 Power On Self Test Type field 3 9 power supply 1 13 Power Supply field 4 11 powering up 2 6 Priority field 5 21 problem solving C 1 Q quick start for SNMP users 1 15 R rack mounting 2 4 Redundant Power System See RPS Remote Monitoring See RMON Remote Poll screen 6 10 remote polling 6 10 Remote Telnet field 4 6 rese time since last 6 8 reset button 1 13 Reset screen 4 27 resets umber of 6 8 type 6 8 resetting the Switch 4 27 resilient link pair 4 19 resilient links 1 5 configuring 4 20 creating 4 21 deleting 4 21 rules 4 19 setting up 4 19 viewing 4 22 returning products for repair F 4 Rising Action field 4 15 Rising Threshold field 4 14 RMON 5 22 alarm actions 5 28 benefits 5 25 default alarm settings 5 29 enabling and disabling Hosts and Matrix 4 11 features supported 5 26 groups supporte
101. gh Bridges C and A If the link through Bridge C fails as shown in Figure 5 12 the STP system reconfigures the net work so that traffic from segment 2 flows through Bridge B Spanning Tree Protocol 5 13 LAN Segment 1 LAN Segment 1 En Bridge A Bridge B Bridge A Bridge B LAN Segment 2 LAN Segment 2 Bridge C Bridge C LAN Segment 3 LAN Segment 3 DK Figure 5 10 A network configuration that creates loops Figure 5 12 Traffic flowing through Bridge B LAN Segment 1 X Bridge A Bridge B LAN Segment 2 Bridge C LAN Segment 3 Figure 5 11 Traffic flowing through Bridges C and A CHAPTER 5 ADVANCED MANAGEMENT How STP Works STP Initialization Initially the STP system requires the following before it can configure the network m Communication between all the bridges This communication is carried out using Bridge Proto col Data Units BPDUs which are transmitted in packets with a known multicast address m One bridge to start as a master or Root Bridge a central point from which the network is config ured The Root Bridge is selected on the basis of it having the lowest Bridge Identifier value This is a combina tion of the unique MAC address of the bridge and a priority component defined for the bridge The Root Bridge generates BPDUs on all ports at a regu
102. guring the STP Parameters of Ports on page 5 20 The Switch keeps ageing out endstation entries in the Switch Database SDB The Switch has STP enabled and STP is instructing the Switch to age entries in the SDB faster because topology changes are occurring in the network Reduce the number of topology changes by enabling Fast Start for all ports which are directly connected to an endstation refer to Configuring the STP Parameters of Ports on page 5 20 Specify that the endstation entries are Non ageing refer to Setting Up the Switch Database SDB on page 4 16 3 If the network has less than 500 addresses specify that the bridging mode of the Switch is set to For ward to All refer to Setting Up the Switch Unit on page 4 9 Consider disabling STP on the Switch and using resilient links to provide network resilience refer to Enabling STP on the Switch on page 5 17 and Setting Up Resilient Links on page 4 19 You are trying to manage the Switch over a network which has STP and you are losing con tact with the management agent intermit tently As shown in Figure C 1 there is a SuperStack Il Switch unit Switch A between your management workstation and the Switch 1000 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 other tha
103. h Low Samples Period Threshold Threshold per Recovery average Bandwidth Value 85 Value 50 4 60 secs used No action No action Broadcast Value 20 Value 10 4 20 secs bandwidth Notify and No action used blip Percentage of Value 85 Value 50 4 60 secs packets No action No action forwarded Errors per Value 200 Value 100 4 60 secs 10 000 packets Notify No action RMON 5 29 About the Audit Log The Switch keeps an audit log of all management user sessions providing a record of changes to any MIB including the RMON MIB The log can only be read by users at the security access level using an SNMP Network Manager Each entry in the log contains information in the fol lowing order m Entry number Timestamp m User ID Item ID including qualifier m New value of item There is a limit of 16 records on the number of changes stored The oldest records are overwritten first 5 30 CHAPTER 5 ADVANCED MANAGEMENT 6 STATUS MONITORING AND STATISTICS This chapter describes how to view the current operating status of the Switch 1000 how to dis play any error information in a fault log 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 1000 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 ar
104. he 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 5 4 CHAPTER 5 ADVANCED MANAGEMENT AutoSelect VLAN Mode works as follows Port MAC Address VLAN MAC Address VLAN 1 When an endstation is connected to a Switch or 1 08004e050e31 2 08004050631 2 moves from one port to another the Switch learns the MAC address of the endstation moo MAC Address Port MACAddress VLAN MAC Address VLAN 08004e050e31 VLAN Server 1 08004e050e31 08004e050e31 2 FE Figure 5 4 Switch places the port in the VLAN Aal EE pr TJ MAC Haare AutoSelect VLAN Mode has an advantage over Port 080036050631 KLEN Seryer VLAN Mode because once the VLAN Server data base is set up correctly you can move endstations to Figure 5 2 Switch learns the endstation s MAC address other ports or other Switch units and the VLAN allo cation of each endstation is automatically config 2 If the relevant port uses AutoSelect VLAN Mode the ured Switch interrogates the VLAN Server to determine the VLAN membership of the endstation If you use AutoSelect VLAN Mode note the follow ing Port MACAddress VLAN MACAddress VLAN m You need to specify an IP address and community 1 08004e050e31
105. ine up to 700 alarms for the Switch The actions that you can define for each alarm are shown in Table 5 3 Table 5 3 Alarm Actions Action High Threshold Low Threshold No action Notify only Send Trap Notify and Send Trap Block broadcast blip port and multicast traffic on the port for 5 seconds Notify and Send Trap Turn port off disable port Notify and Send Trap Turn port enable port on Blip port Block broadcast and multi cast traffic on the port for 5 seconds Disable port Turn port off Enable port Turn port on Notify and Send Trap If port is the move resilient main port of a resilient link port pair then move to standby Notify and Send Trap Block broadcast blip device and multicast traffic on all ports for 5 seconds Notify and Send trap Turn all ports disable device on device off Notify and Send Trap Turn ports enable device back to original state Blip device Block broadcast and multi cast traffic on all ports for 5 seconds Disable device Turn all ports on device off Re enable Turn ports back to device original state About Default Alarm Settings A new or initialized Switch has four alarms defined for each port m Bandwidth used m Broadcast bandwidth used m Percentage of packets forwarded m Errors per 10 000 packets The default values for each of these alarms are given in Table 5 4 Table 5 4 Initial settings for the default alarms Statistic Hig
106. ing Space In the Port Number field enter the port ID for which you want MAC addresses displayed 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 In the Port field type in the port identifier for this device Select whether the entry is permanent or not by specifying Yes or No in the Permanent field Select INSERT Deleting an Entry from the SDB 1 In the listbox highlight the entry you want to delete and press Return or type the MAC address into the MAC Address field 2 Select DELETE Specifying that an Entry is Permanent 1 In the listbox highlight the entry you want to make permanent and press Return or type the MAC address into the MAC Address field In the Permanent field specify Yes Select INSERT Setting Up Resilient Links You can configure a Switch to provide resilient links to another device so that network disruption is mini mized if a link fails A resilient link pair consists of a main link and a standby link You define a resilient link pair by specifying the main port and standby port at one end of the pair Switch Main port Standby port Resilent link pair Other device Figure 4 13 Resilient link pair Under normal network operating conditions the main link carries your data The Receive Idle signal of a fiber li
107. ing IP without a BOOTP server you must enter the IP address of the Switch before the SNMP Network Manager can communicate with the device To do this refer to Entering an IP Address for the Switch below If you need more information about IP and IPX refer to Managing Over The Network on page 3 2 Entering an IP Address for the Switch 1 Connect a terminal to the console port of the Switch 1000 refer to Connecting a VT100 Termi nal on page 2 7 The terminal should be config ured to 9600 line speed baud rate 8 data bits no parity and 1 stop bit 2 Press Return one or more times until the Main Banner screen appears Quick Start For SNMP Users 1 15 3 At the Main Banner screen press Return to dis play the Logon screen Log on using the default user name admin no password is required Select OK The Main Menu is displayed From this menu select the MANAGEMENT SETUP option The Switch Man agement Setup screen is displayed On the Management Setup screen fill in the follow ing fields m Device IP Address m Device SubNet Mask if necessary Default Router if necessary For further information on the Management Setup screen refer to Setting Up the Switch for Manage ment on page 3 6 If you need the Switch 1000 to send SNMP traps to the Network Manager you may need to set up the address of the Network Manager in the Trap Table Refer to Setting Up Traps
108. ion for VLAN 1 Connect a port on each Switch 1000 to a port in p UT comen the Switch 3000 FX Use the VT100 screens to a Specify that each Switch 1000 port connected to the Switch 3000 FX is a backbone port L_ Senere in VLAN 2 Server 1 in VLAN 1 b Specify that each Switch 1000 port connected to the Switch 3000 FX is a VLT port c Specify that each Switch 3000 FX port con Figure 5 7 VLAN configuration with a basement Switch 3000 FX nected to a Switch 1000 is a VLT port Connect port 1 of the Switch 3000 FX to Server 1 7 Connect two spare ports on the Switch 3000 FX to the router Connect port 2 of the Switch 3000 FX to Server 2 8 Use the VT100 screens or VLAN Server database to Use the VT100 screens or VLAN Server database to specify that one Switch 3000 FX port connected to a Place port 1 of the Switch 3000 FX in VLAN 1 the router is placed in VLAN 1 and the other is b Place port 2 of the Switch 3000 FX in VLAN 2 placed in VAN 2 5 8 CHAPTER 5 ADVANCED MANAGEMENT Setting Up VLANs on the Switch The VLAN Setup screen allows you to m Assign ports to VLANS if those ports use Port VLAN Mode m Define a backbone port for each VLAN m View VLAN setup information for the Switch To access the VLAN Setup screen From the Main Menu select SWITCH MANAGE MENT The Switch Management screen is displayed In the Management Level field choose VLAN Choose the SETUP butto
109. is similar to per forming a power off on cycle No setup information is lost Figure 4 18 Reset screen T CAUTION Performing a reset may cause some of the data being transmitted at that moment to be lost CHAPTER 4 MANAGING THE SWITCH 1000 Initializing the Switch 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 shown on page 1 14 Note that the IP address is not cleared You should only initial ize the Switch if m The configuration of the device no longer suits your network m Other efforts to solve problems have not suc ceeded To initialize the Switch From the Main Menu select the INITIALIZE option The Initialize screen appears as shown in Figure 4 19 Select OK CAUTION Use the Initialize option with great care The Switch configuration is cleared from memory and cannot be recovered After initialization all user information is lost and only default users are avallable 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 m Network loops occur if you have set up resilient links Before initializing the Switch ensure you have disconnected the cabling for all your standby links SuperStack II Switch Initialization This operation will change the device
110. itch means all ports can have security features enabled RMON Features of the Switch Table 5 2 details the RMON support provided by 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 the 100BASE TX port backbone port and Default VLAN m 60 second intervals 120 historical samples stored m 30 second intervals 120 historical samples stored 30 minute intervals 96 historical samples stored Alarms Although up to 700 alarms can be defined for the Switch a new or initialized Switch has four alarms defined for each port a Bandwidth used m Broadcast bandwidth used m Percentage of packets forwarded m Errors per 10 000 packets You can modify these alarms using an RMON management application but you cannot create or delete them For more information about the alarms setup on the Switch refer to About Alarm Actions on page 5 28 and About Default Alarm Settings on page 5 29 Table 5 2 RMON support supplied by the Switch RMON Group Support supplied by the Switch Hosts Hosts Top N Matrix Filter Capture Events Although Hosts is supported by the Switch there are no Hosts sessions defined on a new or initialized Switch by default You can specify that a Hosts session is sta
111. l use the MS Line Draw font Screens are incorrectly displayed Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal Check the settings on your terminal or terminal emulator The management facility s autoconfigura tion works only with baud rates from 1200 to 19 200 The SNMP Network Manager cannot access the device Check that 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 documentation for the Network Manager The Telnet workstation 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 Ensure that you enter the IP address of the Switch correctly when invoking the Telnet facility Traps are not received by the SNMP Network Manager Check that the SNMP Network Manager s IP address and community string are correctly configured The SNMP Network Manager or Telnet worksta tion can no longer access the device Check that Remote Telnet access or Commu nity SNMP access is enabled Check that the port through which you are trying to access the device has not been disabled refer to Setting Up the Switch Ports on page 4 12 If it is enabled check the connections and network cabling at the port
112. lar interval known as the Hello Time All other bridges in the network have a Root Port This is the port nearest to the Root Bridge and it is used for receiving the BPDUs initiated by the Root Bridge STP Stabilization Once the network has stabilized two rules apply to the network Each network segment has one Designated Bridge Port All traffic destined to pass in the direction of or through the Root Bridge flows through this port The Designated Bridge Port is the port which has the lowest Root Path Cost for the segment 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 1000 Table 5 1 Default path costs Port Type Duplex Cost 100BASE TX 100BASE FX VLT Full 5 Hal 12 10BASE T VLT Full 24 Hal 25 100BASE TX 100BASE FX Full 150 Hal 300 10BASE T Full 650 Hal 700 2 After all the bridges on the network have deter mined the configuration of their ports each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each network segment All other ports are blocked which means that they are prevented from forward ing traffic STP Reconfiguration In the event of a network failure such as a segment going down the STP system reconfigures the net work to cater for the changes If the topology of your network
113. le warranty period Standard warranty service for software products may be obtained by telephoning 3Com s Corporate Service Center or an Authorized 3Com Service Center within the warranty period Products returned to 3Com s Corporate Service Center must be pre authorized by 3Com with a Return Material Authorization RMA number marked on the outside of the package and sent prepaid insured and packaged appropriately for safe shipment The repaired or replaced item will be shipped to Customer at 3Com s expense not later than thirty 30 days after receipt of the defective product by 3Com WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE CUSTOMER S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION TO THE FULL EXTENT ALLOWED BY LAW THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES TERMS OR CONDITIONS EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES TERMS OR CONDITIONS OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND SATISFACTORY QUALITY 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE OR USE OF ITS PRODUCTS 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOE
114. lementing VLANs on your network has three main advantages m It eases the change and movement of devices on IP networks If an endstation in VLAN 1 is moved to a port in another part of the network you only need to specify that the new port is in VLAN 1 a It helps to control broadcast traffic If an endsta tion in VLAN 1 transmits a broadcast frame then only VLAN 1 devices receive the frame m It provides extra security Devices in VLAN 1 can only communicate with devices in VLAN 2 using a router For more information about setting up VLANs on the Switch refer to Virtual LANs VLANs on page Set Spanning Tree Protocol The Switch 1000 supports the Spanning Tree Proto col STP which is a bridge based system for provid ing fault tolerance on networks STP allows you to implement parallel paths for network traffic and ensure that m Redundant paths are disabled when the main paths are operational CHAPTER 1 GETTING STARTED m Redundant paths are enabled if the main traffic paths fail For more information about STP refer to Spanning Tree Protocol on page 5 12 PACE The Switch 1000 supports PACE Priority Access Control Enabled technology which allows multime dia traffic to be carried over standard Ethernet and Fast Ethernet LANs PACE provides two features a Implicit Class of Service When multimedia traf fic is transmitted it is given a higher priority than other data and is the
115. ll Switch ports belong to the Default VLAN VLAN 1 This VLAN is the only one that 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 Specifying a Backbone Port In the Port ID field type the ID of the required port In the VLAN ID field type the ID of the required VLAN In the Select Port Type field select Backbone Port Select APPLY Specifying that a Port is a VLT Port To specify that a port is a VLT port refer to Set ting Up the Switch Ports on page 4 12 To create a VLT link the ports on both ends of the link must be VLT ports Setting Up VLANs Using AutoSelect VLAN Mode To set up VLANS using AutoSelect VLAN Mode you need to m Specify information about the VLAN Server m 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 To access the VLAN Server screen From the Main Menu select SWITCH MANAGE MENT The Switch Management screen is displayed In the Management Level field choose VLAN Choose the SERVER button The VLAN Server screen is displayed as shown in Figure 5 9 The screen shows the following VLAN Server IP Address Enter the IP address of your VLAN Server in this field Backup VLAN Server IP Add
116. ment facilities if there is important or sensitive data on your network SuperStack II Switch Local Security Monitor Secure Manager Specialist Security Monitor Console Port Enabled Enabled Enabled Enabled Enabled Remote Telnet Enabled Enabled Enabled Enabled Enabled Community SNMP Enabled Enabled Enabled Enabled Enabled ox CIE Figure 4 6 Local Security screen Choosing a Switch Management Level The Switch Management screen allows you to m Choose between managing a port the unit or a VLAN m Display screens for setting up the Switch m Display a screen for managing the Switch Data b isplay screens for managing resilient links D m Display screens for managing STP D m Display screens showing statistics From the Main Menu select SWITCH MANAGE MENT The Switch Management screen is displayed as shown in Figure 4 7 Management Level Port Unit VLAN If you choose Port the screen is displayed similar to Figure 4 7 and all options at the foot of the screen relate to an individual port If you choose Unit the screen appears similar to Figure 4 8 and all options relate to the Switch unit If you choose VLAN the screen appears similar to Figure 4 9 and all options relate to VLANs Port ID 1 2 3 24 25 26 3C16900A 1 2 37 12 13 14 3C16901A If you choose to manage the Switch at port level enter the partic ular
117. must be updated manually With a VLAN setup if an endstation in VLAN 1 is moved to a port in another part of the network you only need to specify that the new port is in VLAN 1 This is something that can be done auto matically if you have 3Com s Transcend Enterprise Manager for Windows v6 0 and above How VLANs Control Broadcast Traffic With traditional networks congestion can be caused by broadcast traffic which is directed to all network devices whether they require it or not VLANs increase the efficiency of your network because each VLAN can be set up to contain only those devices which need to communicate with each other How VLANs Provide Extra Security Devices within each VLAN can only communicate with devices in the same VLAN If a device in VLAN 1 needs to communicate with devices in VLAN 2 the traffic must cross a router An Example Figure 5 1 shows a network configured with 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 In this simple example each of these VLANs can be seen as a broadcast domain physical LAN seg ments that are not constrained by their physical location Specific configurations using the Switch are shown later in
118. n The VLAN Setup screen is displayed as shown in Figure 5 8 The screen shows the following A listbox containing three fields Port This field allows you to select the ID of the port that you want to set up Type VLT Bp Standby ATM AutoSelect This field displays information about the setup of the port a 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 on page 5 3 To specify that a port is a VLT port refer to Setting Up the Switch Ports on page 4 12 SuperStack II Switch ULAN Setup Port Type ULAN Membership SCONOunrona sis ss APPLY Port ID 1 ULAN ID 1 Backbone Port No Figure 5 8 VLAN Setup screen Bp The port is the backbone port for the VLAN s specified in the VLAN Membership field A backbone port is used to connect each VLAN to the backbone of your network 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 Standby The port is the standby port of a resilient link pair The main port of the pair is displayed in brackets For more information about resilient links refer to Setting Up Resil ient Links on page 4 19 ATM The port is an ATM
119. n x 20in x 0 5in securely to the wall if necessary and mount the Switch as follows a Position the base of the unit against the wall or plywood ensuring that the ventilation holes face sidewards Mark on the wall the position of the screw holes in both wall brackets Drill the four holes b Using suitable fixings and screws not provided attach the Switch unit securely to the wall or ply wood c Connect network cabling Installing the Switch 1000 2 5 Hr MIAA ee faee 9455656585 AH ON Body 286000000684 bg HH HAN o 99959595005 Paata HAT 0 62538 iy Q gr A m o 0 Mn D Bb en hee Ss Figure 2 3 Fitting a bracket for wall mounting CHAPTER 2 INSTALLATION AND SETUP Powering up the Switch 1 gt Connect the power cord to the IEC socket on the rear of the Switch and to your mains socket 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 Switch Management Setup on page 3 9 for details of how to configure the type of POST For a new Switch that is being installed for the first time power up takes approximately 13 seconds Check the status LEDs to ensure the Switch is oper ating correctly refer to LEDs on page 1 11 Conne
120. n VLAN 1 Switch A learns the MAC address of Switch B through the port on that VLAN The management agent of Switch B is only accessible through VLAN 1 and so your manage ment workstation cannot communicate with Switch B until it transmits BPDUs across VLAN 1 When that occurs Switch A learns the MAC address of Switch B through the port on VLAN 1 To avoid this situation we recommend that you connect the two SuperStack Il Switch units using a Virtual LAN Trunk VLT For more information about VLTs refer to Connecting Common VLANs Between Switch Units on page 5 3 Using the Switch C 5 Management Workstation bp SuperStack II Switch Switch A Parallel STP Parallel STP Path in VLAN 1 Path in VLAN 2 Switch 1000 t Switch B Figure C 1 Network configuration that results in loss of contact C 6 APPENDIX C TROUBLE SHOOTING D PIN OUTS Null Modem Cable PC AT Serial Cable 9 pin to RS 232 25 pin 9 pin to 9 pin Switch 1000 PC Terminal Switch 1000 PC AT Serial Port Cable connector 9 pin female Cable connector 25 pin male female Cabe connector 9 pin female Cable connector 9 pin female Screen Shell Screen omlyreauiredifscreen Screen Shell Shell Screen 9yreauiredifscreen TxD
121. network configuration Setting Up Resilient Links Creating a Resilient Link Pair 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 4 Select the standby port from the Standby Links Available listbox or enter the port ID in the Standby Port ID field 5 Enable the pair in the Pair Enabled field Select APPLY 6 Connect the cabling for the standby port Deleting a Resilient Link To delete the resilient link set up on the port select the DELETE button at the foot of the screen The Port Resilience screen closes and the Switch Man agement screen is displayed 4 22 CHAPTER 4 MANAGING THE SWITCH 1000 Viewing the Resilient Setup With the Switch Management screen displayed choose the management level Unit and select the RESILIENCE button The Unit Resilience Summary screen is displayed as shown in Figure 4 15 This screen shows the cur rent resilient link configuration for the unit and allows you to access the Port Resilience screen for resilient link pairs The following information is displayed MAIN Port This read only field displays the ID of the port configured as the main port for the resilien
122. nk or the Test Pulse on an Ethernet twisted pair link is continually monitored by the Switch If a signal loss is detected the Switch imme diately enables the standby port so that it carries the data In addition the main port is disabled If a main link has a higher bandwidth than its standby link traffic is automatically switched back to the main link provided no loss of link is detected for two minutes Otherwise you need to manually switch traffic back to the main link Setting Up Resilient Links When setting up resilient links you should note the following Up to 13 resilient link pairs can be configured on a 24 port Switch 1000 and up to seven pairs can be configured on a 12 port Switch 1000 m Resilient links cannot be set up if Spanning Tree STP is enabled on the Switch m Resilient Links can only be set up on fiber or twisted pair links The main and standby links in the same pair however can use any combina tion of these media A resilient link pair can only be set up if a The ports belong to the same VLAN a The ports have an identical security setting a Neither of the ports forms part of another resilient link pair a If the main port is VLT Virtual LAN Trunk port the standby port must also be a VLT port A resilient link pair must be defined at only one end of the connection m You cannot disable any port that is part of a resil ient link pair 4 20 CHAPTER 4 MANAGING THE SWIT
123. nnection a Place ports 1 6 and 13 18 of both Switch units BEN SEMAINE in VLAN 1 b Place ports 7 12 and 19 24 of both Switch units in VLAN 2 2 Connect port 26 of the higher Switch to Server 1 3 Connect port 26 of the lower Switch to Server 2 4 Use the VT100 screens or VLAN Server database to Figure 5 6 VLAN configuration with two Switch 1000 units pl t 26 of the higher Switch in VLAN 2 eh Mu DS el 8 Connect a VLAN 1 port on the lower Switch to the b Place port 26 of the lower Switch in VLAN 1 router 5 Connect a port on the higher Switch to a port in 9 Connect a VLAN 2 port on the lower Switch to the the lower Switch router 6 Use the VT100 screens to specify that the Switch to Switch port on the higher Switch is a backbone port and a VLT port 7 Use the VT100 screens to specify that the Switch to Switch port on the lower Switch is a VLT port Virtual LANs VLANs 5 7 Example 3 The example shown in Figure 5 7 illustrates two VLANs spanning three Switch 1000 units and a Backoone por basement Switch 3000 FX with a Plug in Module Pe Each Switch 1000 connects into the basement Switch using a VLT The attached router allows the two VLANs to communicate with each other To set up this configuration Use the VT100 screens or VLAN Server database to a Place ports 1 6 and 13 18 of all the Switch 1000 units in VLAN 1 b Place ports 7 12 and 19 24 of all the Switch TE 1000 units in VLAN 2 P D Connect
124. nsen zu betrachten solange die Leucht diode unter Strom steht Ebenso ist es ratsam den Glasfaser Tx Anschlu und die Enden der Glasfaserk abel nicht direkt zu betrachten solange diese unter Strom stehen SCREEN ACCESS RIGHTS The following table lists the rights assigned to each level of user for accessing and editing Switch 1000 screens via the VT100 interface All access rights are read and write unless other wise stated Screen Available to Screen Available to Port Traffic Statistics Monitor Manager Security Port Error Analysis Monitor Manager Security Logon Monitor Manager Security Port Resilience Monitor Manager Security Main Menu Monitor Manager Security Port Setup Monitor read only Manager Security Switch Management Monitor Manager Security Unit Statistics Monitor Manager Security Port STP Monitor read only Manager Security Unit Database View Monitor Manager Security Port Statistics Monitor Manager Security Unit Resilience Monitor Manager Security Unit Setup Monitor read only Manager Security APPENDIX B SCREEN ACCESS RIGHTS 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
125. o 18 AWG Type 5V ou SJ 3 conducteur Le cordon surmoul doit avoir une capacit de courant calcul e au moins de 10A a La fiche de fixation doit tre un type mis la terre avec une configuration NEMA 5 15P 15A 125V ou NEMA 6 15P 15A 250V C est essentiel que le socle soit install pr s de l unit et soit accessible Vous pouvez seulement d brancher l unit en enlevant la fiche d alimen tation de la prise de courant Cette unit marche sous les conditions SELV Safety Extra Low Voltage conform ment IEC950 ces conditions sont maintenues seule ment si le mat riel auquel elle est branch e est aussi en exploitation sous SELV L unit ne devrait pas tre branch e une prise de courant C A source de courant sous aucun pr texte sans un branchement mis la terre mis la masse Pour conformer aux normes de s curit europ ennes un fusible de rechange ne doit pas tre ajust l admission d appareil Seulement les fusibles du m me fabricant construit et type doivent tre utilis s avec l unit m Assurer que l entr e de la source d alimentation soit d branch e avant d ouvrir le couvercle de fusible du connecteur IEC ou d enlever le couver cle de l unit m Seulement Pour La France et Le P rou a Cette unit ne peut pas tre mise en marche des sources de courant IT Imp dance la terre Si vos sources de courant sont de type IT cette unit doit tre aliment e par 2
126. ole A O XXXXXXXXXX 9600 8 1N A A IEC Power socket Unit serial number Console port for Location for Location for Ethernet amp fuse holder out of band management Plug in Module Transceiver Module address Figure 1 5 Switch 1000 rear view Power Socket The Switch 1000 automatically adjusts to the supply voltage The fuse is suitable for both 110V A C and 220 240V A C operation For informa tion on replacing fuses refer to Appendix A Unit Serial Number You may need this serial number for fault reporting purposes Redundant Power System Socket Use one of these sockets to connect a SuperStack Il Redundant Power System RPS to the unit You can use either socket Refer to Connecting a Redun dant Power System RPS on page 2 6 Reset Button Using the reset button simulates a power off on cycle This has the same effect as carrying out a reset via the VT100 interface refer to Resetting the Switch on page 4 27 Console Port Connect a terminal to the console port to carry out remote or local out of band configuration and man agement The console port is set to auto baud 8 data bits no parity and 1 stop bit Unit Overview Rear Plug in Module Slot Use this slot to install a Plug in Module The Module can be used to provide a high speed link to the rest of your network 3Com provides a range of Plug in Modules contact your supplier for availability gt When a Plug in Module i
127. on page 4 24 3Com Network Managers such as Transcend Enter prise Manager for Windows may automatically con figure the Switch 1000 to send traps to them Please read the documentation supplied with your network management software When you have finished with the Management Setup screen select OK 1 16 CHAPTER 1 GETTING STARTED 2 INSTALLATION AND SETUP Following Safety Information Before installing or removing any components from the Switch or carrying out any maintenance proce dures you must read the safety information pro vided in Appendix A of this guide Positioning the Switch 1000 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 A wall mounting rack mounting kit containing two mounting brack ets and six screws is supplied with the Switch When deciding where to position the unit ensure that m You are able to meet the configuration rules detailed in the following section m The unit is accessible and cables can be con nected easily Cabling is away from Sources of electrical noise such as radios transmitters and broadband amplifiers a Power lines and fluorescent lighting fixtures Water or moisture cannot enter the case of the unit Air flow around the unit and through the vents in the side o
128. or the Security field on page 4 13 m The system administrator can enter and update entries using a MIB browser an SNMP Network Manager or the Switch Database screen described in the following sections There are three types of entries in the SDB m Ageing entries Initially all entries in the data base are ageing entries Entries in the database are removed aged out if after a period of time ageing time the device has not transmitted This prevents the database from becoming full with obsolete entries by ensuring that when a device is removed from the network its entry is deleted from the database Ageing entries are deleted from the database if the Switch is reset or a power off on cycle occurs For more informa tion about setting an ageing time refer to Set ting Up the Switch Unit on page 4 9 m Non ageing entries If the ageing time is set to 0 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 is reset or a power off on cycle occurs For more information about setting an ageing time refer to Setting Up the Switch Unit on page 4 9 m Permanent entries Permanent entries do not age and they are retained in the database if the Switch is reset or a power off on cycle occurs The Database View The Unit Database View screen as shown in Figure 4 12 allows you to view and configure the Swit
129. oration 3ComFacts is a service mark of 3Com Corporation Other brand and product names may be registered trademarks or trademarks of their respective holders 3Com Environmental Statement It is 3Com s policy to be environmentally friendly in all its operations This manual is printed on paper that comes from European sustainable managed forests The production process for making the pulp has a reduced AOX level adsorbable organic halogen resulting in elemental chlorine free paper The paper is fully biodegradeable and recyclable CONTENTS ABOUT THIS GUIDE Introduction 1 How to Use This Guide 1 Conventions 2 Related Documentation 2 1 GETTING STARTED About the Switch 1000 1 1 Summary of Features 1 1 Port Connections 1 2 10BASE T Ports 1 2 100BASE TX Port 1 2 Plug in Module 1 2 Transceiver Module 1 2 Backbone Port 1 2 Switch Operation and Features 1 3 How Does the Switch Compare to a Bridge 1 3 Forwarding of Packets 1 3 Intelligent Flow Management 1 4 Full Duplex 1 4 Security 1 5 Resilient Links 1 5 Virtual LANs 1 5 Spanning Tree Protocol 1 5 PACE 1 6 Switch 1000 on Your Network 1 6 Server Connections 1 6 Network Configuration Examples 1 6 Network Segmentation 1 7 Network Segmentation Il 1 8 Desktop Switching 1 9 Unit Overview Front 1 10 10BASE T Ports 1 11 100BASE TX Port 1 1 LEDs 1 11 Unit Overview Rear 1 12 Power Socket 1 13 Unit Serial Number 1 13 Redundant Power System Socket 1
130. orized service provider using one of these numbers 3Com Corporation U S 3Com ANZA East West 3Com Asia Limited P R of China Hong Kong India Indonesia Korea Malaysia Singapore Taiwan R O C Thailand 3Com Benelux B V Belgium Netherlands 3Com Canada Calgary Montreal Ottawa Toronto Vancouver 3Com France 3Com GmbH Austria Czech Slovak Republics Germany Hungary Poland Switzerland 3Com Ireland 3Com Japan 800 NET 3Com or 1 408 764 5000 61 2 9937 5000 61 3 9866 8022 86 10 68492 568 Beijing 86 21 6374 0220 Ext 6115 Shanghai 852 2501 1111 91 11 644 3974 62 21 523 9181 82 2 319 4711 60 3 732 7910 65 538 9368 886 2 377 5850 662 231 8151 4 32 725 0202 31 30 6029700 403 265 3266 514 683 3266 613 566 7055 416 498 3266 604 434 3266 33 1 69 86 68 00 43 1 5134323 42 2 21845 800 49 30 3498790 Berlin 49 89 627320 Munich 36 1 250 83 41 48 22 6451351 41 31 996 14 14 353 1 820 7077 81 3 3345 7251 F 4 APPENDIX F TECHNICAL SUPPORT Regional Sales Office Telephone Number 3Com Latin America Argentina Brazil Chile Colombia Mexico Peru Venezuela 3Com Mediterraneo Italy 3Com Middle East 3Com Nordic AB Denmark Finland Norway Sweden 3Com Russia 3Com South Africa 3Com U K Limited 54 1 312 3266 55 11 546 0869 56 2 633 9242 57 1 629 4110 52 5 520 7841 51 1 221 5399 58 2 953 8122 39 2 253011 Milan 39 6 5279941 Rom
131. ork 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 equip ment and may be used to manage many aspects of network and endstation operation Spanning Tree Protocol STP A bridge based system for providing fault tolerance on networks STP works by allowing you to imple ment parallel paths for network traffic and ensure that redundant paths are disabled when the main paths are operational and enabled if the main paths fail standby port The port in a resilient link that will take over data transmission if the main port in the link fails STP See Spanning Tree Protocol STP switch A device which filters forwards and floods frames based on the frame 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 A layered set of communications protocols providing Telnet terminal emulation FTP file transfer and other services for communication among a wide range of computer equipment Telnet A TCP IP application protocol that provides virtual terminal service letting a user log in to another computer system and access a host as if the user were connected directly to the host TFTP Trivial File Transfer Protocol Allows you to transfer files such as softwa
132. ort when you exit the screen Ensure that the connected equipment s console port parameters are set to match the new configuration This allows you to continue to access the management facility from the equipment after you change the console port parameters The screen shows the following 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 through a modem DCD Control and DSR Control are enabled For all other cases this field should be set to Local DCD Control Enabled Disabled This field is only applicable to local connection types It determines if DCD is required for a local connection and whether the connection is closed if DCD is removed Refer to your terminal or modem user documenta tion if you are unsure of the correct setting SuperStack II Switch Console Port Setup Connection Type Local DCD Control Disabled DSR Control Disabled Flow Control NONE Auto Config Enabled peed 9600 Char Size 8 Parity NONE Stop Bit 1 OK ICANCEL Figure 4 17 Console Port Setup screen DSR Control Enabled Disabled This field is only applicable to local connection types It determines if DSR is required for a local connection and whether the connection is closed if DSR is removed Refer to your terminal or modem user documentation if you are unsure of the correct setting Flow Control XON XOFF NO
133. ot 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 Frames Filtered The total number of frames that were filtered because the destination address was on the same segment port as the source station Errors The total number of errors which have occurred on this port Errors can be one of the fol lowing m CRC Alignment Errors m Short Events m Long Frames m Late Events m Jabbers The value shown should be a very small proportion of the total data traffic IFM Count The number of times Intelligent Flow Management IFM has had to operate to minimize packet loss Port Traffic Statistics 6 5 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 indi cates the composition of frames in the network The frame size ranges are m 64 octets m 65 127 octets m 128 255 octets m 256 511 octets m 512 1023 octets m 1024 1518 octets The composition of frames on your network may help you to analyze the efficiency of your network layer protocol 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 ch
134. otify blip blip port notify Use this field to specify the action for the alarm to take when it reaches the rising threshold m none no action takes place m event an SNMP trap is generated m disable port the port is disabled m disable port notify the port is disabled and an SNMP trap is generated a blip the broadcast and multicast traffic on the port is blocked for five seconds blip port notify the broadcast and multicast traffic on the port is blocked for five seconds and an SNMP trap is generated If user defined is displayed in the Rising Action field an unrecognized action has been specified using a MIB browser You cannot select this option Falling Action none event enable event enable Use this field to specify the action for the alarm to take when it reaches the falling threshold m none no action takes place m event an SNMP trap is generated m enable the port is enabled m event enable the port is enabled and an SNMP trap is generated Setting Up the Switch Ports 4 15 If user defined is displayed in the Rising Action field an unrecognized action has been specified 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 m Broadcast Storm Control calculates the average broadcast bandwidth over the
135. otocol In this way you can perform out of band management using Telnet or SNMP Cables required for this connection depend on the type of workstation you are using You must config ure the workstation to run SLIP Refer to the docu mentation supplied with the workstation for more details You must configure the console port of the Switch to accept SLIP and set up the SLIP parameters address and subnet mask Refer to Switch Man agement Setup on page 3 9 gt You may need a 5 wire cable when running SLIP Two of the wires are required for Flow Control Methods of Managing the Switch 1000 You can manage the Switch in four ways m Using the VT100 interface by connecting a VT100 terminal or workstation with terminal emulation software to the Switch console port m Using the VT100 interface over a TCP IP network using a workstation running VT100 terminal emulation and Telnet m Using the VT100 interface by connecting a work station running SLIP to the Switch console port m Using an SNMP Network Manager over a net work running either the IP or IPX protocol Each Network Manager provides its own user inter face to the management facilities Using the VT100 Management Interface The menu driven user interface built into the Switch is known as the VT100 or Local Manage ment interface The VT100 management interface provides a forms based structure with pre defined security levels enabling access to b
136. own in Figure 3 1 The console port detects the line speed baud rate from these keystrokes and defaults to m auto baud 8 data bits m no parity 1 stop bit Data bits parity and stop bit values cannot be changed 2 At the Main Banner press Return to display the Logon screen Logging On At the Logon screen displayed in Figure 3 2 enter your user name and password note that they are both case sensitive m f you have been assigned a user name and pass word enter those details 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 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 User Name Default Access Level Password monitor monitor monitor this user can view but not change all manageable parameters manager manager manager this user can access and change the operational parameters but not special security features security security security this user can access and change all manageable parameters admin no password security this user can access and change all manageable parameters Setting Up the Switch for Management 3 7 SuperStack II Switch Logon User Name EMMEN Password 1 OK Figure 3 2 Logon screen CHAPTER 3 SETTING UP FOR MANAGE
137. primary path for transporting traffic between network segments backbone port A port which does not learn device addresses and which receives all frames with an unknown address Backbone ports are normally used to connect the Switch to the backbone of your network Note that backbone ports were formerly known as designated downlink ports bandwidth Information capacity measured in bits per second that a channel can transmit The bandwidth of Ethernet is 10Mbps the bandwidth of Fast Ether net is 100Mbps 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 A device that interconnects local or remote net works no matter what higher level protocols are involved Bridges form a single logical network cen tralizing network administration broadcast A message sent to all destination devices on the network broadcast storm Multiple simultaneous broadcasts that typically absorb available network bandwidth and can cause network failure console port 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
138. prove their efficiency and reduce the load on their network 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 RMON is the common abbreviation for the Remote Monitoring MIB Management Information Base a system defined by the IETF documents RFC 1271 and RFC 1757 which allows you to monitor LANs remotely A typical RMON setup consists of two components The RMON probe An intelligent remotely controlled device or software agent that continually collects statistics about a LAN segment or VLAN and transfers the information to a management workstation on request or when a pre defined threshold is crossed m The management workstation Communi cates with the RMON probe and collects the sta tistics from it The workstation does not have to be on the same network as the probe and can manage the probe by in band or out of band connections About the RMON Groups The IETF define nine groups of Ethernet RMON sta tistics This section describes these groups and details how they can be used Statistics The Statistics group provides traffic and error statis tics showing packets bytes broadcasts multicasts and errors on a LAN segment or VLAN Information from the Statistics group is use
139. r more errors a second it operates in Store and Forward mode until the number of errors a second returns to zero gt For more information about selecting forwarding modes refer to Setting Up the Switch Unit on page 4 9 Intelligent Flow Management Intelligent Flow Management IFM is a system for controlling congestion on your network Conges tion can be caused by one or more devices sending traffic to an already busy port on the Switch 1000 If a port on the Switch 1000 is connected to another switch or endstation IFM prevents packet loss and inhibits the device from generating more packets until the period of congestion ends IFM should be enabled on a port if it is connected to another switch or an endstation IFM should be disabled on a port connected to a repeater For more information about enabling IFM refer to Setting Up the Switch Ports on page 4 12 Full Duplex The Switch 1000 provides full duplex support for all its fixed ports and Fast Ethernet Plug in Module ports Full duplex allows frames to be transmitted and received simultaneously and in effect doubles the potential throughput of a link In addition full duplex also supports 100BASE FX cable runs of up to 2km 6562ft Full duplex can be enabled on all the relevant ports all the Fast Ethernet ports or on individual ports It is not supported by the Transceiver Module For more information about enabling full duplex re
140. r a TCP IP network Up to three active Telnet ses sions can access the Switch concurrently If a con nection to a Telnet session is lost inadvertently the connection is closed by the Switch after 2 3 min utes of inactivity Before you can start a Telnet session you must set up the IP parameters described in Switch Manage ment Setup on page 3 9 To open the Telnet session you must specify the IP address of the device you want to manage Check the user manual supplied with the Telnet facility if you are unsure how to do this Once the connection is established the main banner of the VT100 management interface is displayed and you can log on Managing Over The Network Any Network Manager running the Simple Network Management Protocol SNMP can manage the 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 Transcend range of Network Managers all have facilities for managing the Switch The Switch supports SNMP over both IP and IPX protocols IP Addresses If you are uncertain about IP addresses that may be assigned to your devices contact your network administrator first To operate correctly each device on your network must have a unique IP address IP addresses have the format n n n n where n is a decimal number between 0 and 255 An example IP address is
141. re upgrades from a remote device using your Switch local management capa bilities Transcend 3Com s umbrella management system used to manage all of 3Com s networking solutions UDP 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 VLAN Virtual LAN A group of location and topol ogy independent devices that communicate as if they are on a common physical LAN VLT Virtual LAN Trunk A Switch to Switch link which carries traffic for all the VLANs on each Switch VT100 A type of terminal which uses ASCII characters VT100 screens have a text based appearance INDEX Numerics 100BASE TX port 1 2 1 11 10BASE T port 1 2 1 11 3Com Bulletin Board Service 3ComBBS F 1 3Com sales offices F 3 3Com URL F 1 3ComFacts F 2 3ComForum F 2 A Access Level field 4 3 access rights B 1 Active Port field 4 21 4 22 ageing entries 4 16 ageing time specifying 4 11 agent software version number 6 8 alarm actions 5 28 alarm settings default 5 29 Alarms RMON group 5 23 Asynchronous Transfer Mode See ATM ATM 1 2 ATM Module 1 2 ATM networks extending VLANs into 5 5 audit log 5 29 Auto Config field 4 25 auto logout 3 12 Auto Logout screen 3 12 AutoSelect VLAN Mode 5 3 specifying 5 11 B backbone port 1 2 5 8 specifying 5 10 Backbone Port field 4 11 5
142. reaches the end of the list At he end of the list it moves the cursor to the next field m Ctrl U moves the cursor one page up the list box m Ctrl D moves the cursor one page down the list box 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 Left Arrow moves you to the previous field on the screen or the next character in an editable field Right Arrow moves you to the next field on the screen or the previous character in an editable field Ctrl R refreshes the screen Ctrl B moves the cursor to the next button Ctrl P aborts the current screen and returns you to the previous screen Ctrl N actions the inputs for the current screen and moves to the next screen Ctrl K displays a list of the available key strokes Navigating the VT100 Screens 3 5 Correcting Text Entry gt Use Delete on a VT100 terminal or Backspace on a PC This moves the cursor one space to the left and deletes a character If you are using Telnet or a terminal emulation pro gram you may find that some of the Control keys do not operate or that they activate other functions Check carefully in the manual accompanying your T
143. refore forwarded ahead of other data when it arrives at the Switch The Implicit Class of Service feature minimizes latency through the Switch and protects the quality of multimedia traffic m Interactive Access When two way multimedia traffic passes over an Ethernet network interfer ence can occur because access to the bandwidth is unequally allocated to traffic in one direction The Interactive Access feature allocates the avail able bandwidth equally in both directions there fore increasing the quality of the traffic For more information about setting up PACE on the Switch refer to Setting Up the Switch Unit and Setting Up the Switch Ports in Chapter 4 Switch 1000 on Your Network Server Connections gt When connecting servers to the Switch 1000 use the following rules to ensure that the Switch is operating at maximum efficiency m Ideally any local server should be connected to the Switch using a 100Mbps port m f that is not possible connect the local server to a dedicated 10Mbps port m f that is not possible and the local server is con nected to a repeated segment where the traffic is mainly local to that segment disable Intelligent Flow Management IFM on the port to which the repeater is connected If your network is running a peer to peer protocol for example Windows 95 and you have multiple endstations connected to the Switch via a repeater we recommend that you dis
144. ress This field allows you to enter the IP address of a backup VLAN Server A backup VLAN Server can be used to supply VLAN allocations when the Switch cannot access the main VLAN Server VLAN Server Community String This field allows you to enter a community string for the VLAN Server s The default community string is public Virtual LANs VLANs SuperStack II Switch VLAN SERVER ULAN Server IP Address 9 8 8 Backup VLAN Server IP Address 8 8 8 8 ULAN Server Community String public Throttle msec 58 Poll Period sec 688 OK CANCEL Figure 5 9 VLAN Server screen Throttle 0 99999 This field allows you to specify the time delay in milliseconds between the trans mission of VLAN allocation requests to the Server The time delay is used to avoid placing an excessive workload on the VLAN Server The default setting for this field is 50 milliseconds Poll Period This read only field shows the time interval in seconds between successive polls of the VLAN Server The Switch polls the VLAN Server once every poll period to check for any changes Specifying AutoSelect VLAN Mode To specify that the Switch uses AutoSelect VLAN Mode refer to Setting Up the Switch Unit on page 4 9 To specify that a port on the Switch uses AutoSelect VLAN Mode refer to Setting Up the Switch Ports on page 4 12 CHAPTER 5 ADVANCED MANAGEMENT Spanning Tree Protocol gt U
145. rk reconfigures and therefore how rapidly the network recovers from a path failure refer to Con figuring the STP Parameters of VLANs on page 5 18 Spanning Tree Protocol LAN A PC 100 PC 100 Port 1 Port Port Forwarding Forwarding Forwarding Bridge A Root Bridge B Bridge X Port 2 Port 2 Port 2 Forwarding Forwarding Blocking PC 100 PC 100 LAN B PC 100 PC 200 Port Port Forwarding Forwarding Bridge C Bridge Y Port 2 Port 2 Forwarding Blocking PC 100 PC 200 LAN C Figure 5 13 Port costs in a network CHAPTER 5 ADVANCED MANAGEMENT STP Configurations Figure 5 14 shows two possible STP configurations using SuperStack Il Switch units m Configuration 1 Redundancy for Back bone Link In this configuration a Switch 1000 and Switch 3000 TX both have STP enabled and are con nected by two Fast Ethernet links STP discovers a duplicate path and disables one of the links If the enabled link breaks the disabled link becomes re enabled therefore maintaining con nectivity m Configuration 2 Redundancy through Meshed Backbone In this configuration four Switch 3000 TX units are connected such that there are multiple paths between each one STP discovers the duplicate paths and disables two of the links If an enabled link break
146. rom the date of purchase from 3Com or its Authorized Reseller 3Com warrants the media containing software against failure during the warranty period No updates are provided 3Com s sole obligation with respect to this express warranty shall be at 3Com s discretion to refund the purchase price paid by Customer for any defective software products or to replace any defective media with software which substantially conforms to 3Com s applicable published specifications Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty or representation that its software products will work in combination with any hardware or applications software products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected For any third party products listed in the 3Com software product documentation or specifications as being compatible 3Com will make reasonable efforts to provide compatibility except where the noncompatibility is caused by a bug or defect in the third party s product STANDARD WARRANTY SERVICE Standard warranty service for hardware products may be obtained by delivering the defective product accompanied by a copy of the dated proof of purchase to 3Com s Corporate Service Center or to an Authorized 3Com Service Center during the applicab
147. rovide a Fast Ethernet or Asynchronous Transfer Mode ATM backbone connection to the rest of your network A slot at the rear of the unit allows you to install any of the 3Com 10Mbps Ethernet Transceiver Mod ules When a Transceiver Module is fitted port 1 automatically switches to become the Transceiver Module port The Transceiver Module can provide a 10Mbps link to the rest of your network Backbone Port The Switch allows you to specify any port to be a backbone port with the following attributes m Frames with unknown addresses received by the Switch are forwarded to the port m Addresses received on the port are not stored in the Switch Database the database which con tains the device addresses received by the Switch A backbone port is typically used to connect the Switch to the backbone of large networks over 500 MAC addresses For information about how to specify a backbone port for a new or initialized Switch refer to Setting Up the Switch Unit on page 4 9 You can specify one backbone port for each VLAN defined on the Switch For more information about how to specify a backbone port for a VLAN refer to Setting Up VLANs on the Switch on page 5 8 Switch Operation and Features How Does the Switch Compare to a Bridge The table below shows how Switch 1000 operation compares to that of a conventional IEEE 802 1d bridge IEEE 802 1d Bridge Switch 1000 About the Switch 1000 1
148. rted on the Default VLAN for more information refer to Setting Up the Switch Unit on page 4 9 Although Hosts Top N is supported by the Switch there are no Hosts Top N sessions defined on a new or initialized Switch Although Matrix is supported by the Switch there are no Matrix sessions defined on a new or initialized Switch by default You can specify that a Matrix session is started on the Default VLAN for more information refer to Setting Up the Switch Unit on page 4 9 The Filter group is not presently supported by the Switch The Capture group is not presently supported by the Switch A new or initialized Switch has events defined for use with the default alarm system Refer to About Default Alarm Settings on page 5 29 for more information RMON 5 27 When using the RMON features of the Switch you should note the following a After the default sessions are created they have no special status You can delete or change them as required m The Switch 1000 can forward a very large volume of packets per second The Statistics RMON group is able to monitor every packet but the other groups sample a maximum of 6000 packets a second m The greater the number of RMON sessions the greater the burden on the management resources of the Switch however the forwarding perfor mance of the Switch is not affected 5 28 CHAPTER 5 ADVANCED MANAGEMENT About Alarm Actions You can def
149. s one of the disabled links becomes re enabled therefore maintaining con nectivity Switch 3000 TX Switch 1000 Switch 3000 1X switch 3000 Tx Cas oo S oS en oo gt lt gt Switch 3000 TX 4 Figure 5 14 STP configurations Enabling STP on the Switch Vv To enable STP on your Switch From the VT100 Main Menu select SWITCH MAN AGEMENT The Switch Management screen is dis played In the Management Level field choose Unit Choose the SETUP button The Unit Setup screen is displayed as shown in Figure 5 15 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 CAUTION If STP is enabled on your Switch 1000 and the Switch is connected to another Switch 1000 a Desktop Switch or a repeater the Bridging Mode of the Switch must be set to Forward to All If the Bridging Mode of the Switch 1000 is set to Forward to Backbone link losses may occur on your network For more information about setting the Bridging Mode for your Switch refer to Setting Up the Switch Unit on page 4 9 Spanning Tree Protocol 5 17 SuperStack II Switch Unit Setup Switch 1666 Switch 1666 Fast Forward Unit Name sysName Max 38 chars Forwarding Mode Intelligent Forwarding N A PACE Disable ULAN Configuration Mode Port
150. s SuperStack Il architecture Connects to Redundant Power System Integrated network management 19 inch rack or stand alone mounting SmartAgent support IP and IPX management over SNMP RMON a Repeater and Bridge MIB Broadcast storm control a Easy software upgrades BOOTP for automatic IP address configuration Local management 1 2 CHAPTER 1 GETTING STARTED Port Connections Transceiver Module 10BASE T Ports The Switch has 12 or 24 10BASE T ports config ured as MDIX cross over which provide a full 10Mbps bandwidth to attached endstations Maxi mum segment length is 100m 328ft over grade 3 4 or 5 twisted pair cable 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 10BASE T ports in 3Com devices are MDIX only 100BASE TX Port The Switch has a single Fast Ethernet 100BASE TX port configured as MDIX cross over which provides a 100Mbps connection to for example a local server The maximum segment length is 100m 328ft over grade 5 twisted pair cable As this port is 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 Plug in Module A slot at the rear of the unit can take a Plug in Module providing an additional high speed port This could be used for example to p
151. s not installed ensure the blanking plate is secured in place Transceiver Module Slot Use this slot to connect a Transceiver Module and provide a 10Mbps link to the rest of the network Port 1 is automatically switched from the front 10BASE T port to the Transceiver Module port when a Module is installed 3Com provides a range of Transceiver Modules contact your supplier for avallability gt When a Transceiver Module is not installed ensure the blanking plate is secured in place Ethernet Address This label shows the unique Ethernet or MAC address assigned to the unit 1 14 CHAPTER 1 GETTING STARTED Unit Defaults The following table shows the factory defaults for the Switch 1000 features Port Status Forwarding Mode Intelligent Flow Management Duplex Mode Virtual LANs PACE Spanning Tree STP Power On Self Test POST System Alarm broadcast band width used System Alarm errors per 10 000 packets System Alarm bandwidth used System Alarm percentage of frames forwarded Enabled Fast Forward Enabled Half duplex on all relevant ports All ports use Port VLAN Mode and belong to the Default VLAN VLAN 1 Disabled Disabled Normal Fast Boot Enabled a High threshold 20 Notify and Blip Low threshold 10 No action Enabled m High threshold 2 Notify a Low threshold 1 No action Enabled m High threshold 85 No action Low threshold
152. sing 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 Therefore if you have an ATM OC 3c Module installed in your Switch it does not join the STP system What is STP gt STP is a part of the 802 1d bridge specification defined by the IEEE Computer Society To explain STP more effectively the Switch 1000 will be defined as a bridge STP is a bridge based system for providing fault tol erance on networks STP allows you to implement parallel paths for network traffic and ensure that m Redundant paths are disabled when the main paths are operational m Redundant paths are enabled if the main paths fail As an example Figure 5 10 shows a network con taining three LAN segments separated by three bridges With this configuration each segment can communicate with the others using two paths This configuration creates loops which cause the net work to overload however STP allows you to have this configuration because it detects duplicate paths and immediately prevents or blocks one of them from forwarding traffic Figure 5 11 shows the result of enabling STP on the bridges in the configuration The STP system has decided that traffic from LAN segment 2 to LAN segment 1 can only flow throu
153. sitions This read only field shows the number of times that the current port has transi tioned from the Learning state to the Forwarding state Port Enable Enable Disable This field allows you to enable or disable the current port Priority 0 255 This field allows you to specify the priority of the port By changing the priority of the port you can make it more or less likely to become the Root Port The lower the number the more likely it is that the port will be the Root Port The default setting for this field is 128 Path Cost 0 65535 This field allows you to specify the path cost of the port The Switch automatically assigns the default path costs shown in Table 5 1 on page 5 14 If you spec ify a new path cost in this field this automatic system is disabled and you can only re enable it by initializing the Switch Spanning Tree Protocol Fast Start Enable Disable This field allows you to specify whether the port goes directly to the For warding state when a device is connected to it Set this field to Enable if the port is directly connected to an endstation The default setting for this field is Disable CAUTION If you set the Fast Start field to Enable when the port is connected to multiple endstations loops may occur in your network 5 22 CHAPTER 5 ADVANCED MANAGEMENT What is RMON RMON Using the RMON Remote Monitoring capabilities of your Switch allows network administrators to im
154. specify whether the port is a VLT Virtual LAN Trunk port A Virtual LAN Trunk or VLT is a Switch to Switch link which carries traffic for all the VLANs on each Switch To create a VLT the ports on both ends of the link must be VLT ports For more information about VLTs refer to VLANs and the Switch on page 5 3 If the port uses AutoSelect VLAN Mode refer to the VLAN Configuration Mode field you cannot specify that the port is a VLT port CHAPTER 4 MANAGING THE SWITCH 1000 Duplex Mode Half Duplex Full Duplex Unit Default This field allows you to specify the duplex mode of the port a Full Duplex Full duplex allows frames to be transmitted and received simultaneously and in effect doubles the potential throughput of a link In addition full duplex also supports 100BASE FX cable runs of up to 2km You should only enable full duplex on a point to point link between the Switch and another device with full duplex support Full duplex is not supported on the Transceiver Module port m Half Duplex You should use half duplex if the port connects to a shared Ethernet or Fast Ether net LAN segment or if the device at the other end of a point to point link does not support full duplex m Unit Default The duplex mode of the port is defined by the Duplex Mode field in the Unit Setup screen This is the default setting VLAN Configuration Mode Port AutoSelect Unit Default This field allows you to
155. spend in the listening and learning states when the Switch is the Root Bridge The default set ting is 15 seconds For more information about these states refer to Configuring the STP Parame ters of Ports on page 5 20 APPLY This button applies any changes to the STP system CHAPTER 5 ADVANCED MANAGEMENT Configuring the STP Parameters of Ports The Port STP screen allows you to set up and manage the STP parameters of each port on the Switch To access the Port STP screen From the Main Menu select SWITCH MANAGE MENT The Switch Management screen is displayed In the Management Level field choose Port In the Port ID field enter the ID of the port to be configured Choose the STP button The Port STP screen is dis played as shown in Figure 5 17 The screen shows the following Port ID 1 2 3 24 25 26 3C16900A 1 21 3 12 13 14 3C16901A This read only field shows the ID of the port to be configured STP State Disabled Listening Blocking Learning Forwarding This read only field shows the current state of the port m Disabled A port in this state does not forward packets and does not participate in STP opera tion m Listening A port in this state is preparing to forward packets but has temporarily blocked to prevent a loop During the Listening state BPDUs are transmitted received and processed SuperStack II Switch Port STP Port ID 1 STP State Design
156. ssword Auto Logout OK CANCEL There is a built in security timeout on the VT100 interface If you do not press any keys for 3 min utes the management facility warns you that the inactivity timer is about to expire If you do not press a key within 10 seconds the timer expires and the screen is locked any displayed statistics continue to be updated When you next press any key the display changes to the Auto Logout screen Figure 3 5 Auto Logout screen The Auto Logout screen shown in Figure 3 5 requests you to enter your password again If the password is correctly entered the screen that was active when the timer expired is displayed If you make a mistake entering your password you are returned to the Logon screen 4 _ MANAGING THE SWITCH 1000 Chapters 4 5 and 6 describe all management facilities If an ATM OC 3c Module is installed in the Switch for the Switch 1000 While following steps in these extra screens are available Refer to the chapters you may find the screen map below useful SuperStack II Switch ATM OC 3c Module User Guide for more information Main Banner Logon 4 Main Menu Switch User Access Management Software iali Remote Management Levels Status Setup Upgrade Initialize Reset Poll Trap Console Fault Log Setup Port
157. sts Top N group extends the Hosts table by providing sorted host statistics such as the top 20 nodes sending packets or an ordered list of all nodes according to the errors they sent over the last 24 hours CHAPTER 5 ADVANCED MANAGEMENT Matrix The Matrix group shows the amount of traffic and number of errors between pairs of devices on a LAN segment or VLAN For each pair the Matrix group maintains counters of the number of packets number of octets and error packets between the nodes The conversation matrix helps you to examine net work statistics in more detail to discover who is talk ing to whom or if a particular PC is producing more errors when communicating with its file server for example Combined with Hosts Top N this allows you to view the busiest hosts and their primary con versation partners Filter The Filter group provides a mechanism to instruct the RMON probe to capture packets that match a specific criterion or condition Capture The Capture group allows you to create capture buffers on the probe that can be requested and uploaded to the management workstation for decoding and presentation Events The Events group provides you with the ability to create entries in an event log and or send SNMP traps to the management workstation Events can originate from a crossed threshold on any RMON variable In addition to the standard five traps required by SNMP link up link down warm start cold st
158. t APPENDIX A SAFETY INFORMATION Stromversorgung und Sicherung Das Ger t stellt sich automatisch auf die Versor gungsspannung ein Die Sicherung ist sowohl f r 110V A C wie f r 220 240V A C geeignet WARNUNG Vor dem ffnen der Sicherungshalter ung das Ger t vom Netzstrom trennen Richtige Stellung der Sicherung Falsche Stellung der Sicherung NICHT VERWENDEN Zum Auswechseln der Sicherung durch leichtes Heben mit einem kleinen Schraubenzieher die Abdeckungsklappe der Sicherungshalterung l sen Sicherungen nur durch gleichen Typ und Wert wie die Originalsicherung ersetzen Sicherung auswech seln und die Klappe der Sicherungshalterung wieder schlie en Steckdose f r Redundant Power System RPS Nur ein 3Com Redundant Power System an diese Steckdose anschlie en F r weitere Angaben die genauen Einbauanweisungen im Handbuch zum Redundant Power System befolgen RJ45 AnschluBen Hierbei handelt es sich um abgeschirmte RJ45 Datenbuchsen die nicht als Telefonbuchsen ver wendbar sind Nur RJ45 Datensteckverbinder an diese Buchsen anschlieBen Diese Datenstecker k nnen entweder mit abge schirmten oder unabgeschirmten Datenkabeln mit abgeschirmten oder unabgeschirmten Klinkenstek kern verbunden werden Glasfaser Anschlu en Unter normalen Umst nden geht von der ber tragenden LED keine Gefahr f r die Augen aus Es wird aber empfohlen die LED nicht durch Ver gr erungsli
159. t link pair STANDBY Port This read only field displays the ID of the port configured as the standby port for the resilient link pair Pair State Active Both Failed Unknown Not Available This read only field displays the current state of the resilient link pair m Active The resilient link pair is enabled and operating normally with both main and standby ports capable of carrying traffic m Both Failed Although the resilient link is cor rectly configured both links have failed Check for any loose connections or cable damage m Unknown The network configuration has changed and the resilient link pair no longer con forms to the rules m Not Available The resilient link pair is disabled SuperStack II Switch Unit Resilience Summary MAIN STANDBY Pair Active Pair Port Port State Port Enable 61 62 Active Main Enabled OK ICANCEL Figure 4 15 Unit Resilience Summary screen Active Port Main Standby Both Failed This read only field displays which port in the resilient link pair is currently carrying traffic m Main The pair is operating in its normal state with the main port carrying traffic m Standby The main port has failed and the standby port is carrying the traffic You should rectify the fault as soon as possible If a main port has a higher bandwidth than the standby port traffic will be automatically switched back provided no loss of link is
160. t 4 9 Setting Up the Switch Ports 4 12 Setting Up the Switch Database SDB 4 16 The Database View 4 17 Searching the Switch Database 4 18 By MAC Address 4 18 By Port 4 18 Adding an Entry into the SDB 4 18 Deleting an Entry from the SDB 4 18 Specifying that an Entry is Permanent 4 18 Setting Up Resilient Links 4 19 Configuring Resilient Links 4 20 Creating a Resilient Link Pair 4 21 Deleting a Resilient Link 4 21 Viewing the Resilient Setup 4 22 Setting Up Traps 4 24 Setting Up the Console Port 4 25 Resetting the Switch 4 27 Initializing the Switch 4 28 Upgrading Software 4 29 ADVANCED MANAGEMENT Virtual LANs VLANs 5 1 What are VLANs 5 1 Benefits of VLANs 5 1 How VLANs Ease Change and Movement 5 2 How VLANs Control Broadcast Traffic 5 2 How VLANs Provide Extra Security 5 2 An Example 5 2 VLANs and the Switch 5 3 The Default VLAN and Moving Ports From the Default VLAN 5 3 Connecting VLANs to a Router 5 3 Connecting Common VLANs Between Switch Units 5 3 Using AutoSelect VLAN Mode 5 3 Using Non routable Protocols 5 5 Using Unique MAC Addresses 5 5 Extending VLANs into an ATM Network 5 5 VLAN Configurations 5 5 Example 1 5 5 Example 2 5 6 Example 3 5 7 Setting Up VLANs on the Switch 5 8 Assigning a Port to a VLAN When Using Port VLAN Mode 5 10 Specifying a Backbone Port 5 10 Specifying that a Port is a VLT Port 5 10 Setting Up VLANs Using AutoSelect VLAN Mode 5 11 Specifying Information About the VLAN Server 5
161. t Power System RPS A 8 RJ45 Anschlu en A 8 Glasfaser Anschlu en A 8 SCREEN ACCESS RIGHTS TROUBLE SHOOTING LEDs C 1 Using the VT100 Interface C 2 Using the Switch C 3 PIN OUTS Null Modem Cable D 1 PC AT Serial Cable D 1 Modem Cable D 2 RJ45 Pin Assignments D 2 SWITCH 1000 TECHNICAL SPECIFICATIONS TECHNICAL SUPPORT 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 Support from 3Com F 3 Returning Products for Repair F 4 GLOSSARY INDEX 3COM CORPORATION LIMITED WARRANTY ELECTRO MAGNETIC COMPATIBILITY ABOUT THIS GUIDE About This Guide provides an overview of this guide describes the guide conventions tells you where to look for specific information and lists other publications that may be useful Introduction p This guide provides the information you need to install and configure the SuperStack II Switch 1000 24 Port 3C16900A and the SuperStack II Switch 1000 12 Port 3C16901A with v3 1 agent software The functionality of both units is identical although the local management screens reflect the different number of ports Where appropriate these differ ences are noted The guide is intended for use by network adminis trators who are responsible for
162. ta and Computer Software Clause at 48 C F R 52 227 7013 3Com Ireland do 3Com Limited 3Com Centre Boundary Way Hemel Hempstead Herts HP2 7YU United Kingdom For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished rights reserved under the copyright laws of the United States If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com AccessBuilder Boundary Routing CardFacts LanScanner LinkBuilder NETBuilder NETBuilder Il NetFacts Parallel Tasking ViewBuilder EtherDisk EtherLink EtherLink Plus EtherLink Il SmartAgent SuperStack TokenLink TokenLink Plus TokenDisk and Transcend are registered trademarks of 3Com Corporation 3TECH CacheCard FDDILink FMS and NetProbe are trademarks of 3Com Corp
163. tack Il Switch 1000 Release Notes Document Number DNA1690 OAAAOx Other publications you may find useful m Documentation accompanying the Plug in Modules m Documentation accompanying the Redundant Power System GETTING STARTED About the Switch 1000 gt Part of 3Com s SuperStack Il range of products the Switch 1000 is designed to overcome the common problem of insufficient bandwidth for today s growing network applications while provid ing low cost high performance networking with little need for configuration Use the Switch 1000 to provide your users with greater bandwidth faster throughput and high speed links The SuperStack Il Switch 1000 is a revision of the LinkSwitch 1000 Summary of Features The Switch 1000 has the following features m 12 or 24 Ethernet 10BASE T ports m Fast Ethernet 100BASE TX port m Plug in Module slot Asynchronous Transfer Mode ATM and Fast Ethernet m Transceiver Module slot 10Mbps Ethernet Support for up to 500 endstations unlimited sta tions on backbone port Four forwarding modes for packets m Intelligent Flow Management for congestion control Full duplex on all fixed Ethernet and Fast Ethernet ports and Fast Ethernet Plug in Module ports Security Resilient Links Support for 16 Virtual LANs VLANs Spanning Tree Protocol STP per VLAN PACE Priority Access Control Enabled for sup porting multimedia applications over Ethernet 3Com
164. tempt the download again Refer to Searching the Switch Database on page 4 18 Upgrading Software 4 29 SuperStack II Switch Software Upgrade Destination Switch File Name 3C16966 51x Server Address This operation will reset the device once the upgrade has been completed IP address format d d d d IPX address format AABBCCDD AABBCCDDEEFF ox a Figure 4 20 Software Upgrade screen To upgrade Switch management software 1 From the Main Menu select the SOFTWARE UPGRADE option The Software Upgrade screen is displayed as shown in Figure 4 20 2 From the Destination field select Switch this is the default 3 In the File Name field enter the name of the file that contains the software image to be down loaded to the Switch You must place the image file where it is accessible to the TFTP load request Check with your system administrator if you are unsure of where to place the image file 4 In the Server Address field enter the IP or IPX address of the server containing the software image to be loaded 4 30 CHAPTER 4 MANAGING THE SWITCH 1000 5 Select OK During the download the MGMT LED flashes green and the screen is locked When the download is complete the Switch is reset Virtual LANs VLANs Setting up Virtual Local Area Networks VLANs on the Switch 1000 provides you with less time consuming network administration and more effi cient n
165. ton the screen is refreshed station was on the same segment port as the to show values for that counter source station MULTI BROADCAST RX Displays the total number of frames received by the current port that are addressed to a multicast or broadcast address FRAMES RECEIVED Displays values for the Frames Received counter the total number of frames that have been received by the current port including fragments and frames with errors MULTI BROADCAST TX Displays the total number of frames transmitted by the current port that are FRAMES TRANSMITTED Displays values for the addressed to a multicast or broadcast address Frame Transmitted counter the total number of frames successfully transmitted by the current port including fragments and frames with errors FRAMES FORWARDED Displays the total number of frames that were received by the current port CLEAR SCREEN COUNTERS Use this button to set all counters shown on the screen to zero Use this button for analysis if you wish to see changes in counters over a short period of time This button does not clear the counters on the device ERRORS Displays the total number of errors which have occurred on the current port Refer to the field description for Errors on page 6 5 and forwarded to other ports Port Statistics With the Switch Management screen displayed choose the management level Port then select the STATISTICS button The Port Statistics screen is dis
166. topology changes that have occurred in the current VLAN SuperStack II Switch ULAN STP ULAN ID 1 Topology Changes Designated Root Hello Time s 2 Root Cost Forward Delay s 15 Root Port 1 Hold Time s 1 Time Since Topology Change 9 Minutes 7 Seconds 5 Max Age s 28 8008 88084E 890247 858 Refer to the User Guide before changing the settings of these parameters Bridge Priority 32768 Bridge Max Age s 28 Bridge Hello Time s 2 Bridge Forward Delay s 15 APPLY Figure 5 16 VLAN STP screen Max Age 6 40 This read only field shows the time in seconds that the Switch waits before trying to re configure the network If the Switch has not received a BPDU within the time specified in this field it will try to re configure the network topol ogy Designated Root This read only field shows the Bridge Identifier of the designated Root Bridge Hello Time 1 10 This read only field shows the time delay in seconds between the transmission of BPDUs from the Switch Root Cost This read only field shows the path cost from the Switch to the Root Bridge Forward Delay 4 30 This read only field shows the time in seconds that the ports on the Switch spend in the listening and learning states For more information about these states refer to Configur ing the STP Parameters of Ports on page 5 20 Root Port This read only field shows the Root Port of the Switch
167. tware drivers and technical articles about all 3Com products as well as a messaging section for peer support To use Call 3ComFacts using your Touch Tone telephone 3ComForum you need a CompuServe account using one of these international access numbers To use 3ComForum Country Telephone Number 1 Log on to your CompuServe account Hong Kong 852 2537 5610 2 Type go threecom U K 44 1442 438279 3 Press Return to see the 3ComForum main menu U S A 1 408 727 7021 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 When you contact your network supplier for assis tance have the following information ready m A list of system hardware and software includ ing revision levels m Diagnostic error messages m 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 Your Network Supplier F 3 Regional Sales Office Telephone Number Support from 3Com If you are unable to receive support from your network supplier technical support contracts are available from 3Com Contact your local 3Com sales office to find your auth
168. um UTP cable length is 100m 328ft over category 5 cable m A 2km 6562ft fiber run is allowed for connect ing switch to switch or endstation to switch MAC MAC 2 412m 1352ft fiber Configuration Rules with Full Duplex 2 3 1 Repeater 225m 738ft fiber Pail pe III TUT R EE ts Fast Ethernet Switch 100m 328ft UTP LO SS A n 7 OTT Orr TTTT TTT 2 od Fast Ethernet Repeater 100m 328ft UTP 2 Repeaters 100m 328ft UTP __ Fast Ethernet Repeater 5m 16ft UTP se Fast Ethernet Repeater 100m 328ft UTP MAC MAC Full Duplex 2km 6562ft fiber Bridge Router or Switch Figure 2 1 Fast Ethernet configuration rules CHAPTER 2 INSTALLATION AND SETUP Installing the Switch 1000 Rack Mounting A 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 Place the unit the right way up on a hard flat sur face with the front facing towards you Locate a mounting bracket over the mounting holes on one side of the unit as shown in Figure 2 2 LA A HE PH IT Hr HAE CE PUAI He 1 IR PNN m a C 77 Q Figure 2 2 Fitting a bracket for rack mounting 3 Insert the three screws an
169. unting 2 5 World Wide Web WWW F 1 Z zeroing screen counters 6 2 6 5 6 7 3Com Corporation 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 Network adapters Lifetime Other hardware products unless otherwise specified above 1 year Spare parts and spare kits 90 days 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 All products that are replaced will become the property of 3Com Replacement products may be new or reconditioned Any replaced or repaired product or part has a ninety 90 day warranty or the remainder of the initial warranty period whichever is longer 3Com shall not be responsible for any software firmware information or memory data of Customer contained in stored on or integrated with any products returned to 3Com for repair whether under warranty or not SOFTWARE 3Com warrants that the software programs licensed from it will perform in substantial conformance to the program specifications therefor for a period of ninety 90 days f
170. vice The Plug in Module Status LED lights yellow If the MGMT LED is flashing yellow the Module has failed its Power On Self Test refer to the previ ous advice Otherwise the Module s agent software is not installed correctly Refer to the User Guide supplied with the Module The Plug in Module Status LED flashes yellow The Module is not recognized You may need to download a version of the Switch s management agent software that recognizes the Module refer to Upgrading Software on page 4 29 or remove the Module Contact your supplier for further advice A link is connected and yet the Status LED does not light Check that m All connections are secure m Fiber cables are free from damage m The devices at both ends of the link are powered up m The connection uses cross over cable if you are linking a 10BASE T or 100BASE TX port with a device which is MDIX only APPENDIX C TROUBLE SHOOTING Using the VT100 Interface The initial Main Banner screen does not display Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal For console port access you may need to press Return several times before the Main Banner appears Check the settings on your terminal or terminal emulator The management facility s auto configura tion works only with baud rates from 1200 to 19 200 Check that you are using a suitable font for exam ple in HyperTermina
171. witch on page 5 8 Connecting VLANs to a Router If the devices in a VLAN need to talk to devices in a different VLAN each VLAN requires a connection to a router Communication between VLANs can only take place if they are all connected to the router A Virtual LANs VLANs 5 3 VLAN not connected to a router is an isolated VLAN You need one port for each VLAN connected to the router Connecting Common VLANs Between Switch Units If you want to connect the VLANs on the Switch 1000 with the same VLANs on another Switch unit you can set up one link per VLAN Alternatively you can set up a single link for all the VLANs by cre ating a Virtual LAN Trunk VLT A VLT is a Switch to Switch link which carries traffic for all the VLANs on each Switch To set up a VLT you config ure the port at each end of the link VLTs can only be used for links between Super Stack II Switch 1000 Switch 3000 and Desktop Switch units You cannot use VLTs for Switch router links If you specify that a port on one VLAN is a VLT port that port carries traffic for all the VLANs on the Switch If you then disable the VLT function on that port the port only carries traffic for the Default VLAN VLAN 1 Using AutoSelect VLAN Mode By default all ports on the Switch use Port VLAN Mode where each switch port is manually placed in the required VLAN The Switch allows some ports to use another mode AutoSelect VLAN Mode In this mode t
172. you to enter community strings for each remote Network Man ager allowing a very simple method of authentica tion between the Switch 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 Network Manager into the trap table The default community string is public SuperStack II Switch Trap Setup mmmmmm IP or IPX Address Throttle milli secs 168 Community String public public public public public public public public ENTER TEEN ER ERDE ER i mm aa oo so ENTER TERN EEE ER TER ox CIE Figure 4 16 Trap Setup screen Throttle This field allows you to specify a throttle delay value for each remote Network Manager Throttle delays are time periods placed between packets to prevent a remote Network Manager receiving too many traps at once The unit of throt tle is one thousandth of a second The default value is 100 which gives a delay of one tenth of a second between each packet transmission Setting Up the Console Port Setting Up the Console Port From the Switch Management Setup screen described in Chapter 3 select the CONSOLE PORT button The Console Port Setup screen is displayed as shown in Figure 4 17 If you change any of the console port parameters you terminate any existing sessions using the con sole p
173. ype 188BASE FX Transceiver Module Type Not Fitted Power Supply Internal ok Figure 4 10 Unit Setup screen 3C16900A m Store and Forward Received packets are buff ered in their entirety prior to forwarding This ensures that only good frames are passed to their destination The forwarding delay for this mode varies between 64us and 1 2ms depending on frame length In this mode the latency measured as the time between receiving the last bit of the frame and transmitting the first bit is 8us a Intelligent The Switch monitors the amount of error traffic on the network and changes the forwarding mode accordingly If the Switch detects less than 18 errors a second it operates in Fast Forward mode If the Switch detects more than 18 errors a second it operates in Store and Forward mode until the number of errors returns to zero Intelligent Forwarding Fast Forward Store and Forward This read only field shows the forwarding state if the Forwarding Mode is set to Intelligent CHAPTER 4 MANAGING THE SWITCH 1000 PACE Enable Disable This field allows you to enable or disable PACE Priority Access Control Enabled for all ports on the Switch PACE allows multimedia traffic to be carried over standard Ether net and Fast Ethernet LANs by providing two fea tures a Implicit Class of Service When multimedia traf fic is transmitted it is given a higher priority than other data and is therefore forwarded

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