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3Com 1000 User Manual

3com user guide hub/switch superstack ii switch 1000 agent software version 3.1
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SuperStack
User Guide
®
Agent Software Version 3.1
http://www.3com.com/
Document No. DUA1690-0AAA05
Published June 1997
®
II Switch 1000

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  Summary of Contents for 3Com 1000

  • Page 1 SuperStack User Guide ® Agent Software Version 3.1 http://www.3com.com/ Document No. DUA1690-0AAA05 Published June 1997 ® II Switch 1000...
  • Page 2 LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.
  • Page 3: Table Of Contents

    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 I 1-7 Network Segmentation II 1-8 Desktop Switching 1-9 Unit Overview —...
  • Page 4 Connecting a VT100 Terminal Emulator 2-7 Connecting a Workstation Running SLIP 2-8 ETTING P FOR ANAGEMENT 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...
  • Page 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...
  • Page 6 PECIFICATIONS ECHNICAL UPPORT Online Technical Services F-1 World Wide Web Site F-1 3Com Bulletin Board Service F-1 Access by Analog Modem F-1 Access by Digital Modem F-2 3ComFacts Automated Fax Service F-2 3ComForum on CompuServe Online Service F-2 Support from Your Network Supplier F-3...
  • Page 7: About This Guide

    Release Notes. Throughout this guide, the SuperStack 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.
  • Page 8: Conventions

    Risk of personal injury, system damage, or loss of data Warning Risk of severe personal injury Related Documentation The Switch 1000 document set includes: SuperStack II Switch 1000 Quick Reference Guide. Document Number DQA1690-0AAA0x SuperStack II Switch 1000 Quick Installation Guide.
  • Page 9: Getting Started

    Use the Switch 1000 to provide your users with greater bandwidth, faster throughput and high speed links. The SuperStack II Switch 1000 is a revision of the LinkSwitch 1000. Summary of Features The Switch 1000 has the following features:...
  • Page 10: Port Connections

    Transceiver Module 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.
  • Page 11: Switch Operation And Features

    Unknown Destination Address Database size 4000 addresses In all other ways, Switch 1000 and bridge opera- tion is identical. Forwarding of Packets The table below shows how a packet is processed when it arrives at the Switch 1000. Packet Source...
  • Page 12: Intelligent Flow Management

    HAPTER ETTING TARTED To best suit your networking requirements, the Switch 1000 allows you to select one of four frame forwarding modes: 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 40µs, but with the lack of...
  • Page 13: Security

    “Setting Up Resilient Links” page Virtual LANs “Setting 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.
  • Page 14: Pace

    IFM on the port to which the repeater is connected. 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...
  • Page 15: Network Segmentation I

    Switch 1000 on Your Network Network Segmentation I 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.
  • Page 16: Network Segmentation Ii

    ETTING TARTED 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.
  • Page 17: Desktop Switching

    Switch 1000 on Your Network 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.
  • Page 18: Unit Overview - Front

    1-10 1: G HAPTER ETTING TARTED Unit Overview — Front Figure 1-4 Switch 1000 front view: 3C16901A top, 3C16900A bottom...
  • Page 19: 10Base-T Ports

    As these ports are configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 10BASE-T ports in 3Com devices are MDIX-only. 100BASE-TX Port The Switch has a single Fast Ethernet 100BASE-TX...
  • Page 20: Unit Overview - Rear

    1-12 1: G HAPTER ETTING TARTED Unit Overview — Rear Figure 1-5 Switch 1000 rear view...
  • Page 21: Power Socket

    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. When a Plug-in Module is not installed, ensure the blanking plate is secured in place.
  • Page 22: Unit Defaults

    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.
  • Page 23: Quick Start For Snmp Users

    “Setting Up the Switch for Manage- ment” 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”...
  • Page 24 1-16 1: G HAPTER ETTING TARTED...
  • Page 25: Installation And Setup

    Appendix A 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.
  • Page 26: Configuration Rules For Fast Ethernet

    (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.
  • Page 27 Configuration Rules with Full Duplex Figure 2-1 Fast Ethernet configuration rules...
  • Page 28: Installing The Switch 1000

    2: I HAPTER NSTALLATION AND Installing the Switch 1000 Rack Mounting The Switch is 1.5U high and fits in most standard 19-inch racks. CAUTION: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the underside of the unit, if fitted.
  • Page 29: Wall Mounting

    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.
  • Page 30: Powering-Up The Switch

    The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is through the power cord. The Switch enters a Power On Self Test (POST). The time taken for the test to complete is dependent on the type of POST configured (refer to Management Setup”...
  • Page 31: Connecting Equipment To The Console Port

    Switch, you need a standard null modem cable: Connect one end of the cable to the console port on the Switch, and the other to the console port on the VT100 terminal. Ensure that your terminal is set to:...
  • Page 32: Connecting A Workstation Running Slip

    NSTALLATION AND ETUP Connecting a Workstation Running SLIP You can communicate with the Switch via the con- sole port from a workstation running SLIP (Serial Line Internet Protocol). In this way, you can perform out-of-band management using Telnet or SNMP.
  • Page 33: Setting

    ETTING Methods of Managing the Switch 1000 You can manage the Switch in four ways: Using the VT100 interface by connecting a VT100 terminal (or workstation with terminal emulation software) to the Switch console port. Using the VT100 interface over a TCP/IP network using a workstation running VT100 terminal emulation and Telnet.
  • Page 34: Using Telnet

    Switch, provided the MIB (Management Informa- tion Base) is installed correctly on the management workstation. Each Network Manager provides its own user inter- face to the management facilities. 3Com's Transcend “Switch Manage- facilities for managing the Switch. The Switch supports SNMP over both IP and IPX protocols.
  • Page 35: Obtaining A Registered Ip Address

    If your network is internal to your organization only, you may use any arbitrary IP address. We sug- gest you use addresses in the series 191.100.X.Y, where X and Y are numbers between 1 and 254. Use 191.101.X.Y for the SLIP address. If your network has a connection to the external IP network, you will need to apply for a registered IP address.
  • Page 36: Navigating The Vt100 Screens

    3: S HAPTER ETTING P FOR ANAGEMENT Navigating the VT100 Screens Screen Conventions To differentiate types of information, the VT100 screens use the following conventions: Type of Shown on screen information as... Choice Field text Entry Field [text] Button List Box monitor manager security...
  • Page 37: Keyboard Shortcuts

    Keyboard Shortcuts There are several special characters or combinations of characters that allow you to make shortcuts. [Tab] allows you to move from one field to the next, on any screen, without making any changes. [Return] moves you to the next field on a form after you have made changes to the data in a field.
  • Page 38: Setting Up The Switch For Management

    Figure 3-1 Main Banner At your terminal, press [Return] two or more times until the Switch 1000 Main Banner is displayed (shown in Figure 3-1). The console port detects the line speed (baud rate) from these keystrokes and defaults to:...
  • Page 39: Logging On

    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.
  • Page 40: After Logging On

    ANAGEMENT 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...
  • Page 41: Switch Management Setup

    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 “Unit Overview —...
  • Page 42 ANAGEMENT If you suspect that there is a problem with the Switch that has not been detected by the Normal tests, set this field to Extended and reset the Switch (refer to “Resetting the Switch” 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.
  • Page 43 Setting Up the Switch for Management 3-11 SETUP TRAPS Select this button to display the setup screen for trap parameters. Trap setup is described in “Setting Up Traps” 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...
  • Page 44: Logging Off

    3-12 3: S HAPTER ETTING P FOR ANAGEMENT Logging Off If you have finished using the VT100 management interface, select the LOGOFF option from the bottom of the Main Menu screen. If you accessed the VT100 management interface using a Telnet ses- sion or modem connection, the connection is closed automatically.
  • Page 45: Managing The Switch

    ANAGING Chapters 4, 5 and 6 describe all management facilities for the Switch 1000. While following steps in these chapters, you may find the screen map below useful: Figure 4-1 Screen map 1000 WITCH If an ATM OC-3c Module is installed in the Switch, extra screens are available.
  • Page 46: Setting Up Users

    From this screen you can access: LOCAL SECURITY screen — This allows you to set up access levels for users on the Switch. CREATE USER screen — This allows you to create up to 10 users in addition to the default users set up on the Switch.
  • Page 47: Creating A New User

    — access to view, but not change, a subset of the manageable parameters of the Switch secure monitor — as monitor manager — access to all the manageable param- eters of the Switch, except security features Figure 4-3. Figure 4-3 Community String By default, a community string identical to the user name is generated.
  • Page 48: Deleting A User

    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). Select DELETE USERS. 1000 Figure 4-4. Figure 4-4 Delete Users screen...
  • Page 49: Editing User Details

    Community String This field allows you to enter a community string for the user. If you forget your password while logged out of the Switch VT100 interface, contact your local tech- nical support representative who will advise on your next course of action.
  • Page 50: Assigning Local Security

    You may want to disable all access to the man- agement facilities if there is important or sensitive data on your network. 1000 Figure 4-6. Figure 4-6 Local Security screen...
  • Page 51: Choosing A Switch Management Level

    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 relate to the Switch unit. If you choose VLAN, the screen appears similar to Figure relate to VLANs.
  • Page 52 (port or unit). Refer to Up Resilient Links” 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. 1000 page Figure 4-9 “Virtual LANs...
  • Page 53: Setting Up The Switch Unit

    Forwarding Mode Fast Forward / Fragment Free / Store and Forward / Intelligent This field allows you to set the forwarding mode for the Switch: Fast Forward — Frames are forwarded as soon as the destination address is received and verified.
  • Page 54 VLAN. This is the default mode. 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. “Using AutoSelect page 5-3.
  • Page 55 (3C16900A) 1 / 2 / 3 /...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.
  • Page 56: Setting Up The Switch Ports

    Figure 4-11 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.
  • Page 57 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...
  • Page 58 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. Unit Default — The port uses Port VLAN Mode or...
  • Page 59 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. Broadcast Storm Control calculates the average broadcast bandwidth over the previous 20-second interval.
  • Page 60: Setting Up The Switch Database (Sdb)

    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:...
  • Page 61: The Database View

    4-12, allows you to view and configure the Switch Database. To access the Unit Database View screen, display the Switch Management screen, choose the 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.
  • Page 62: Searching The Switch Database

    AutoSelect VLAN Mode. Searching the Switch Database You can search the switch database in two ways: by MAC address or port number. By MAC Address To locate the port number against which a particular...
  • Page 63: 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. Resilient links cannot be set up if Spanning Tree (STP) is enabled on the Switch.
  • Page 64: Configuring Resilient Links

    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. 1000 Figure 4-14 Link State Available / Not Available / Not Present This read-only field shows the connection state of...
  • Page 65: Creating A Resilient Link Pair

    Ensure both ports have an identical port security mode configuration and that they are members of the same VLAN. At the Switch Management screen, select the port to be configured as the main port in the link. Select the RESILIENCE button at the foot of the screen.
  • Page 66: Viewing The Resilient Setup

    Otherwise, set the Active Port setting in the Port Resilience screen (described on 4-20) to Main to manually switch traffic back. Both Failed — Both ports of the resilient link pair have failed. This could be due to loose connec- tions or cable damage.
  • Page 67 Setting Up Resilient Links 4-23 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” page 4-20.
  • Page 68: Setting Up Traps

    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...
  • Page 69: Setting Up The Console Port

    Connection Type Local / Remote This field allows you to select the type of console port connection. Select Remote if you want to manage the Switch through a modem; DCD Control and DSR Control are enabled. For all other cases, this field should be set to Local.
  • Page 70 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.
  • Page 71: Resetting The Switch

    Resetting the Switch If you suspect a problem with the Switch, you can reset it. From the Main Menu, select the RESET option. The Reset screen is displayed as shown in Figure 4-18. Select OK. Resetting the Switch in this way is similar to per- forming a power-off/on cycle.
  • Page 72: Initializing The Switch

    All ports are set to their default values, and are therefore enabled and available to all users. When initializing the Switch, take particular note of the following: Network loops occur if you have set up resilient links.
  • Page 73: Upgrading Software

    Upgrading Software 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 Technical Services” page F-1. For upgrading the ATM OC-3c Module software, refer to the “SuperStack II Switch ATM OC-3c Module User Guide”.
  • Page 74 4-30 4: M 1000 HAPTER ANAGING WITCH Select OK. During the download, the MGMT LED flashes green and the screen is locked. When the download is complete, the Switch is reset.
  • Page 75: Advanced Management

    DVANCED 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 network operation. The following sections explain more about the con- cept of VLANs and explain how they can be imple- mented on the Switch 1000.
  • Page 76: How Vlans Ease Change And Movement

    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,...
  • Page 77: Vlans And The Switch

    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.
  • Page 78 AutoSelect VLAN Mode has an advantage over Port VLAN Mode because once the VLAN Server data- base is set up correctly, you can move endstations to other ports or other Switch units and the VLAN allo- cation of each endstation is automatically config- ured.
  • Page 79: Using Non-Routable Protocols

    Chapter 5 The example shown in 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.
  • Page 80: Example 2

    Example 2 The example shown in Figure 5-6 VLANs spanning two Switch 1000 units. VLAN 1 is able to talk to VLAN 2 using the connection between each VLAN and the router. Ports within the same VLAN but on different Switches communicate using the VLT.
  • Page 81: Example 3

    VLAN 1. Place ports 7–12 and 19–24 of all the Switch 1000 units in VLAN 2. Connect a port on each Switch 1000 to a port in the Switch 3000 FX. Use the VT100 screens to: Specify that each Switch 1000 port connected to the Switch 3000 FX is a backbone port.
  • Page 82: Setting Up Vlans On The Switch

    This field displays information about the setup of the port: 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”...
  • Page 83 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.
  • Page 84: Assigning A Port To A Vlan When Using Port Vlan Mode

    In the VLAN ID field, enter the ID of the required VLAN. Select APPLY. CAUTION: Initially, all 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.
  • Page 85: Setting Up Vlans Using Autoselect Vlan Mode

    Specifying AutoSelect VLAN Mode To specify that the Switch uses AutoSelect VLAN Mode, refer to page To specify that a port on the Switch uses AutoSelect VLAN Mode, refer to Switch Ports” Virtual LANs (VLANs) VLAN Server screen “Setting Up the Switch Unit”...
  • Page 86: Spanning Tree Protocol

    What is STP? 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.
  • Page 87 Figure 5-10 A network configuration that creates loops. Traffic flowing through Bridges C and A Figure 5-11 Spanning Tree Protocol Figure 5-12 Traffic flowing through Bridge B 5-13...
  • Page 88: How Stp Works

    The Root Path Cost consists of the path cost of the Root Port of the bridge, plus the path costs across all the Root Ports back to the Root Bridge. Table 5-1 shows the default path costs for the Switch 1000. Table 5-1 Default path costs Port Type Duplex...
  • Page 89: An Example

    Spanning Tree Protocol 5-15 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.
  • Page 90: Stp Configurations

    SuperStack II Switch units: 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...
  • Page 91: Enabling Stp On The 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 Up the Switch Unit”...
  • Page 92: Configuring Stp On The Switch

    STP. Configuring the STP Parameters of VLANs The Switch has a completely separate STP system for each VLAN that you have specified. Each VLAN has its own Root Bridge, Root Ports and BPDUs.
  • Page 93 Bridge Priority 0...65535 This field allows you to specify the priority of the Switch. By changing the priority of the Switch, you can make it more or less likely to become the Root Bridge. The lower the number, the more likely it is that the bridge will be the Root Bridge.
  • Page 94: Configuring The Stp Parameters Of Ports

    Learning — A port in this state is preparing to forward packets, but has temporarily blocked to prevent a loop. During the Learning state, the Switch learns the addresses of all error-free pack- ets. The port is included in STP calculations, and BPDUs can be transmitted, received and pro- cessed.
  • Page 95 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 page 5-14.
  • Page 96: Rmon

    The following sections explain more about the RMON concept and the RMON features supported by the Switch. You can only use the RMON features of the Switch if you have an RMON management application, such as the RMON application supplied with 3Com’s Transcend Enterprise Manager.
  • Page 97: About The Rmon Groups

    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.
  • Page 98: Matrix

    5-24 5: A HAPTER DVANCED ANAGEMENT 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.
  • Page 99: Benefits Of Rmon

    Benefits of RMON Using the RMON features of your Switch has three main advantages: It improves your efficiency It allows you to manage your network in a more proactive manner It reduces the load on the network and the man-...
  • Page 100: Rmon And The Switch

    RMON and the Switch RMON requires one probe per LAN segment, and stand-alone RMON probes have traditionally been expensive. Therefore, 3Com’s approach has been to build an inexpensive RMON probe into the Smart- Agent of each Switch. This allows RMON to be widely deployed around the network without cost- ing more than traditional network management.
  • Page 101 After the default sessions are created, they have no special status. You can delete or change them as required. The Switch 1000 can forward a very large volume of packets per second. The Statistics RMON page 4-9.
  • Page 102: About Alarm Actions

    5-28 5: A HAPTER DVANCED ANAGEMENT About Alarm Actions You can define up to 700 alarms for the Switch. The actions that you can define for each alarm are shown in Table 5-3. Table 5-3 Alarm Actions Action High Threshold No action.
  • Page 103: About Default Alarm Settings

    About Default Alarm Settings A new or initialized Switch has four alarms defined for each port: Bandwidth used Broadcast bandwidth used Percentage of packets forwarded Errors per 10,000 packets The default values for each of these alarms are given in Table 5-4.
  • Page 104 5-30 5: A HAPTER DVANCED ANAGEMENT...
  • Page 105: Status Monitoring And Statistics

    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 are only recommendations.
  • Page 106: Summary Statistics

    Figure The Summary Statistics screen lists values for the current counter against every port on the Switch 1000 and it is refreshed approximately every two seconds. Once values have reached approximately 4,000,000,000 they are reset to zero. To view values for a particular counter, select the first button displayed at the foot of the Summary Statistics screen.
  • Page 107: Port Statistics

    Port Statistics With the Switch Management screen displayed, choose the management level Port, then select the STATISTICS button. The Port Statistics screen is dis- played, as shown in Figure 6-2. As well as showing statistics for the port, the Port Statistics screen allows you access to traffic and error counter screens.
  • Page 108: Port Traffic Statistics

    6: S HAPTER TATUS ONITORING AND Port Traffic Statistics With the Port Statistics screen displayed, select the TRAFFIC STATISTICS button. The Port Traffic Statistics screen is displayed, as shown in The Port Traffic Statistics screen shows the follow- ing: Port ID The ID of the port you are currently manag- ing.
  • Page 109 Fragments The total number of packets received that were not an integral number of octets in length or that had a bad Frame Check Sequence (FCS), and were less than 64 octets in length (excluding fram- ing bits, but including FCS octets). Frames Forwarded The total number of frames which were received by the port and forwarded to their destination address.
  • Page 110: Port Error Analysis

    6: S HAPTER TATUS ONITORING AND Port Error Analysis With the Port Statistics screen displayed, select the ERROR ANALYSIS button. The Port Error Analysis screen is displayed, as shown in The Port Error Analysis screen shows the following: Port ID The ID of the port you are currently manag- ing.
  • Page 111 Port Error Analysis Jabbers The total number of packets received that were longer than 8K octets (excluding framing bits, but including FCS octets). CLEAR SCREEN COUNTERS Select this button to set all counters shown on the screen to zero. It is useful for trend analysis if you wish to see changes in counters over a short period of time.
  • Page 112: Status Monitoring

    TATISTICS Figure 6-5 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. Status screen...
  • Page 113: Fault Log

    The Fault Log displays read-only information about the Switch which is updated whenever an abnor- mal condition is detected. This information is for internal 3Com use only. You may be asked to quote this information if reporting a fault to your supplier.
  • Page 114: Remote Polling

    When the poll is complete, the Round Trip Time field shows the interval in milliseconds between sending the frame to the target device and receiving a response at the Switch. If the target device does not respond after approximately 10 seconds, this field displays no reply.
  • Page 115: A Safety Information

    If installing the Switch unit in a stack with Super- ® Stack II 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.
  • Page 116 1:1, with the secondary connection point labelled Neutral, connected directly to Earth (Ground). U.K. only: The Switch 1000 is covered by Oftel General Approval, NS/G/12345/J/100003, for indirect connection to a public telecommunications system. This can only be achieved using the console port on the unit and an approved modem.
  • Page 117: Power Supply And Fuse

    Sockets for Redundant Power System (RPS) Only connect a 3Com Redundant Power System to this socket. For details, follow the installation instructions in the manuals accompanying the Redundant Power System.
  • Page 118: L'information De Sécurité Importante

    L'installation et l'enlèvement de l'unité doivent être faits seulement par le personnel qualifié. Si vous entassez l'unité Switch avec les unités SuperStack II Hub, l'unité Switch 1000 doit être installée en dessous des unités Hub plus étroites. Cette unité doit être mise à la terre.
  • Page 119: La Source De Courant Et Le Fusible

    5A anti-transitoires du même type et fabricant que l'original doivent être utilisés. Socle Pour Alimentation Multiple Brancher seulement une alimentation multiple de 3Com à cet socle. Suivre pour les détails les direc- tives de l'installation dans le manuel qui accompa- gne l'alimentation multiple.
  • Page 120: Les Ports Rj45

    A: S PPENDIX AFETY NFORMATION Les Ports RJ45 Ceux-ci sont les prises de courant de données RJ45 protégées. Ils ne peuvent pas être utilisés comme prises de courant téléphoniques. Brancher seule- ment les connecteurs RJ45 de données à ces prises de courant.
  • Page 121: Wichtige Sicherheitsinformationen

    WARNUNG: Warnungen enthalten Anweisungen, die zur eigenen Sicherheit unbedingt zu beachten sind. Bitte befolgen Sie alle Anweisungen sorgfältig und genau. Bitte unbedingt vor dem Einbauen des Switch 1000 Einheit die folgenden Sicherheitsanweisungen durchlesen. Ein- und Ausbau des Gerätes ist nur von Fachpersonal vorzunehmen.
  • Page 122: Stromversorgung Und Sicherung

    Originalsicherung ersetzen. Sicherung auswech- seln und die Klappe der Sicherungshalterung wieder schließen. Steckdose für Redundant Power System (RPS) Nur ein 3Com Redundant Power System an diese Steckdose anschließen. Für weitere Angaben die genauen Einbauanweisungen im Handbuch zum Redundant Power System befolgen.
  • Page 123: B Screen Access Rights

    CREEN 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... Logon Monitor Manager Security...
  • Page 124 B: S PPENDIX CREEN CCESS IGHTS Screen Available to... VLAN STP Monitor read-only Manager Security VLAN Server Monitor read-only Manager Security VLAN Setup Monitor read-only Manager Security User Access Levels Monitor Manager Security Local Security Security Create User Security Delete Users Security Edit User Monitor...
  • Page 125: C Trouble - Shooting

    ROUBLE The following is a list of problems you may see when managing the Switch with suggested courses of corrective action to take. If you have a problem which is not listed here and you cannot solve it, please contact your local technical support represen- tative.
  • Page 126: Using The Vt100 Interface

    Check the device's IP address, subnet mask and default router are correctly configured, and that the device has been reset. Ensure that you enter the IP address of the Switch correctly when invoking the Telnet facility. Traps are not received by the SNMP Network...
  • Page 127: Using The Switch

    You are using PACE equipped devices and have the Interactive Access feature of PACE enabled at both ends of the link. Interactive Access must only be enabled at one end of the Switch-device link. Dis- abling Interactive Access for a Switch port as described in “Setting Up the Switch Ports”...
  • Page 128 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 Switch Ports”...
  • Page 129 Using the Switch To avoid this situation, we recommend that you connect the two SuperStack II Switch units using a Virtual LAN Trunk (VLT). For more information about VLTs, refer to “Connecting Common VLANs Between Switch Units” page 5-3. Figure C-1 Network configuration that results in loss of contact...
  • Page 130 C: T PPENDIX ROUBLE SHOOTING...
  • Page 131: D Pin - Outs

    OUTS Null Modem Cable PC-AT Serial Cable 9-pin to RS-232 25-pin 9-pin to 9-pin...
  • Page 132: Modem Cable

    D: P PPENDIX OUTS Modem Cable RJ45 Pin Assignments 9-pin to RS-232 25-pin Pin assignments are identical for 10BASE-T and 100BASE-TX RJ45 connectors.
  • Page 133: Witch Technical Specifications

    10BASE-T ports) complies with the Class A/Class 1 requirements. Heat Dissipation 100W maximum (341 BTU/hour maximum) Power Supply AC Line Frequency 50–60 Hz Input Voltage Options 100–120 / 200–240 VAC Current Rating 3A (maximum) at 100 VAC / 2A (maximum) at 200 VAC 1000 T ECHNICAL PECIFICATIONS...
  • Page 134 E: S 1000 T PPENDIX WITCH ECHNICAL Standards Supported SNMP SNMP protocol (RFC 1157) MIB-II (RFC 1213) Bridge MIB (RFC 1493) Repeater MIB (RFC 1516) VLAN MIB (RFC 1573) RMON MIB (RFC 1271 and RFC 1757) Terminal Emulation Telnet (RFC 854)
  • Page 135: Echnical Support

    3Com Corporation’s latest news releases, NetAge Magazine, technical documentation and more. 3ComBBS contains patches, software, and drivers for all 3Com products, as well as technical articles. This service is available via modem or ISDN 24 hours a day, 7 days a week.
  • Page 136: Access By Digital Modem

    Germany Italy 3ComForum on CompuServe Online Service 3ComForum contains patches, software, drivers, and technical articles about all 3Com products, as well as a messaging section for peer support. To use 3ComForum, you need a CompuServe account. To use 3ComForum: Log on to your CompuServe account.
  • Page 137: Support From Your Network Supplier

    Details about recent configuration changes, if applicable If you are unable to contact your network supplier, see the following section on how to contact 3Com. Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com.
  • Page 138: Returning Products For Repair

    44 161 8737717 (Manchester) 44 1628 897000 (Marlow) Returning Products for Repair Before you send a product directly to 3Com for repair, you must first 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.
  • Page 139: Glossary

    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.
  • Page 140 The port on the Switch accepting a terminal or modem connector. It changes the parallel arrange- ment of data within computers to the serial form used on data transmission links. This port is most often used for dedicated local management.
  • Page 141 These addresses are specified in the destination-address field of the packet. PACE Priority Access Control Enabled. 3Com’s innovative technology which works in conjunction with a switch to control the latency and jitter associated with the transmission of multimedia traffic over Ethernet and Fast Ethernet.
  • Page 142 Redundant Power System. Part of the SuperStack II 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.
  • Page 143 Switch’s local management capa- bilities. ® Transcend 3Com’s umbrella management system used to manage all of 3Com’s networking solutions. User Datagram protocol. An Internet standard proto- col that allows an application program on one device to send a datagram to an application pro- gram on another device.
  • Page 144 LOSSARY...
  • Page 145: Index

    NDEX 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 Access Level field 4-3 access rights B-1 Active Port field 4-21, 4-22 ageing entries 4-16...
  • Page 146 NDEX resetting to zero 6-2, 6-5, 6-7 Short Events (port error) 6-6 Create User screen 4-3 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...
  • Page 147 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 Management 1-4, 1-6 Intelligent Flow Management field 4-12 Intelligent Forwarding field 4-9...
  • Page 148 Remote Telnet field 4-6 reset time since last 6-8 reset button 1-13 Reset screen 4-27 resets number 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...
  • Page 149 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...
  • Page 150 NDEX editing 4-5 setting up 4-2 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...
  • Page 151 If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at its option and expense, repair the defective product or part, deliver to Customer an equivalent product or part to replace the defective item, or refund to Customer the purchase price paid for the defective product.
  • Page 152 LECTRO AGNETIC OMPATIBILITY FCC S TATEMENT 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.

This manual is also suitable for:

Superstack ii 1100Superstack ii 1000