Cabletron Systems SmartSTACK ELS100 Installation And User Manual
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Cabletron Systems SmartSTACK ELS100 Installation And User Manual

Cabletron systems user guide hub/switch els100-24tx
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SmartSTACK 100
ELS100-24TX

ETHERNET SWITCH

INSTALLATION
AND
USER GUIDE

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Summary of Contents for Cabletron Systems SmartSTACK ELS100

  • Page 1: Ethernet Switch

    SmartSTACK 100 ELS100-24TX ETHERNET SWITCH INSTALLATION USER GUIDE...

  • Page 2: Fcc Notice

    Only qualified personnel should perform installation procedures. Cabletron Systems reserves the right to make changes in specifications and other informa- tion contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.

  • Page 3: Doc Notice

    IMPORTANT: Before utilizing this product, carefully read this License Agreement. This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in firm- ware, chips or other media.

  • Page 4: Safety Information

    (ii) and its successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Com- puter Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Roches- ter, New Hampshire 03867-0505.

  • Page 5: Declaration Of Conformity

    Mr. Ronald Fotino Full Name Principal Compliance Engineer Title Rochester, NH, USA Location 89/336/EEC 73/23/EEC Cabletron Systems, Inc. 35 Industrial Way PO Box 5005 Rochester, NH 03867 Mr. J. Solari Cabletron Systems Limited Nexus House, Newbury Business Park London Road, Newbury...

  • Page 7: Table Of Contents

    Site Requirements ..........13 Mounting the Switch on a Table or Shelf ......14 Mounting the Switch on a Wall .
  • Page 8 Reset............50 4. CONFIGURING & MONITORING THE SWITCH ......51 Common Tasks .
  • Page 9 5. SNMP MANAGEMENT ..........63 The SNMP Protocol .
  • Page 10 APPENDIX E. CLASS OF SERVICE......... 89 APPENDIX F.

  • Page 11: Preface

    PREFACE Purpose This guide provides information about the features and applications of the ELS100-24TX switch as well as instructions for configuring and monitoring the switch. Audience This guide is intended for Ethernet local area network (LAN) administrators and Management Information Systems (MIS) personnel with the following background: •...

  • Page 12: Keyboard Entries

    Keyboard Entries This guide uses the following conventions for keyboard entries: • When you read “enter,” type the text and press the [Enter] key. • Example: Enter the Gateway IP address and press the [Enter] key. • When you read “select,” type the letter associated with the parameter.

  • Page 13: Organization

    Chapter 2. Installation: Describes the content of your switch shipment, lists site requirements, and provides mounting instructions. Instructions for making connections and powering up the switch are provided as well. Chapter 3. ELS100-24TX User Interface: Describes the user interface console menus and lists the factory defaults for system settings. Each of the console menus are presented along with a description of the selections/fields available within each menu.

  • Page 14: Getting Help

    Modem setting For additional information about Cabletron Systems or its products, visit the World Wide Web site: http:www.cabletron.com/ Before calling the Cabletron Systems Global Call Center, be prepared to provide the following information: • Your Cabletron Systems service contract number •...

  • Page 15: Product Overview

    1. PRODUCT OVERVIEW Description This installation and user guide describes the Cabletron Systems ELS100-24TX Ethernet switch. This unit is IEEE 802.1D-compliant and supports 24 IEEE 802.3u 100Base-TX Fast Ethernet ports. Each port can alternatively operate as an IEEE 802.3i 10Base-T port.
  • Page 16 • Architecture: - 8-port 10/100 switch ASIC in a distributed switching architecture - 4.2 Gbps internal switching fabric - Up to 12 MB packet buffering (512 KB/port) - 4096 MAC address forwarding table per port; up to 12,288 addresses per system - IEEE 802.3u auto-negotiation for full/half duplex and 10/100...

  • Page 17: Front Panel

    100M/Full Duplex mode. Power LED Lights steady green to indicate power is supplied to the switch. Off indicates no power is supplied to the switch. Test LED Lights steady green after a reset and remains on until successful completion of power-on self tests. Off indicates a successful completion of the power-on self tests.
  • Page 18 Figure 1-2 shows the Link and Activity port LEDs for 24 10Base-T/ 100Base-TX ports (default configuration). Pressing the front panel LED mode button changes the operation of these LEDs to 100M Speed and Full Duplex, as shown in Figure 1-3. The numbers above and below the port LEDs identify the LEDs associated with a specific RJ-45 port.

  • Page 19: Rear Panel

    Name Function Power Connector Provides AC power to the switch. Power Switch Allows you to turn the switch power on and off. Fan Outlets Air exit vents through which internal fans discharge air for ventilation purposes. 9032579-03 Product Overview 5...

  • Page 20: Feature Summaries

    LAN segments for purposes of fault tolerance. Two or more physical paths between different segments can be created through the switch, with the Spanning Tree Protocol choosing a single path at any given time and disabling all others. If the chosen path fails for any reason, a disabled alternative is activated, thereby maintaining the connection.

  • Page 21: Software Download

    The ELS100-24TX switch supports the industry-standard Trivial File Transfer Protocol (TFTP) for downloading software to the switch. All switch software is stored in a 2 MB sectored flash ROM. The download feature allows you to easily install software upgrades to the unit. Software can alternatively be downloaded via the serial console port using the XMODEM protocol.

  • Page 22: Rmon

    10Mbps or 100Mbps, and the type of communication setting, half or full duplex. The port is then automatically set by the switch to operate in the proper mode, without user intervention. It is not required that the network...

  • Page 23: Broadcast Throttling

    Broadcast, multicast, and unknown destination address unicast packets received by the switch are typically flooded to all ports on the switch or on a given VLAN. When the number of these types of packets being forwarded is large, the performance of the switch in forwarding packets of other types may suffer.

  • Page 24: Flow Control

    The ELS100-24TX switch is ideal for meeting the needs of today’s high performance networks. The switch’s low cost and high port count makes it attractive and affordable for dedicated 10/100Mbps connections to the desktop.

  • Page 25: Client/Server Network Application

    Client/Server Network Application To improve workstation performance in a client/server environment, the ELS100-24TX switch can be configured to provide 200 Mbps full duplex Fast Ethernet connections to servers by connecting each to a dedicated switch port (Figure 1-5). Users can be accommodated through connections to hubs, both at 10Mbps and 100Mbps speeds, through 10Mbps switches with 100Mbps uplinks, or through direct connections.

  • Page 26: Local Backbone Application

    (Figure 1-6). Workgroup hubs are provided with a single connection to the switch while servers are put on dedicated 100 Mbps ports. Routers and other networking devices can connect off of the switched backbone as well.

  • Page 27: Installation

    • Power cord • This document Site Requirements Before you install the switch, make sure the site meets the following requirements: • Mounting Provide a flat table, wall or shelf surface, or an optional 19 in. (48.3 cm) equipment rack.

  • Page 28: Mounting The Switch On A Table Or Shelf

    Mounting the Switch on a Table or Shelf Mount the switch on a table or shelf in a position which allows access to the front panel RJ-45 ports, visibility of the port LEDs, and access to the power connector. Make sure that the mounting surface can safely support the switch and that there is adequate space around the switch for ventilation and cooling.

  • Page 29: Mounting The Switch On A Wall

    Figure 2-1 shows the orientation of the mounting ears for attaching the ears to the switch for a wall mount application. Be sure that the wall surface can safely support the switch. Do the following: Mount one of the ears to the switch using two (2) of the supplied screws.

  • Page 30: Mounting The Switch In A Rack

    Figure 2-2 shows the orientation of the mounting ears for attaching the ears to the switch for a rack mount application. Mount the switch with the front panel facing forward. Do the following: Mount one of the ears to the switch using two (2) of the supplied screws.

  • Page 31: Connecting A Terminal To The Console Port

    Terminal Equipment (DTE) connection. Alternatively, this port can be connected to an external modem to enable remote dial-in management. If you connect a terminal to the console port prior to powering the switch, you can observe the progress and results of the power-up diagnostics as the switch goes through its initialization process.

  • Page 32: Powering The Switch

    If you want to display the results of the tests after the switch has already been turned on, turn the power switch off and then back on.
  • Page 33 After these two tests are performed, the operational software of the switch is loaded. A series of more extensive diagnostic tests are then conducted during which the Test LED remains lit. The results of the tests are displayed on the terminal. If all tests pass, the Test LED turns off. When all tests are complete, the system is functional and the user interface is ready to receive commands at the console.

  • Page 34: Connecting Network Cables

    Section 14 of the IEEE 802.3 specification. The ports are wired with the MDI-X function implemented. Workstations or servers can be connected to the ELS100-24TX switch using standard straight-through wired cables. For connections to hubs or other switches, a crossover cable may be necessary (refer to the “MDI/MDI-X Crossover Cable Wiring”...

  • Page 35: Els100-24Tx User Interface

    Overview When you have connected a terminal to the console port, or used Telnet to access the switch over the network, access is gained to the console menus. These menus allow you to reconfigure the switch from its factory default settings, as well as to monitor switch status and performance. The menus have a layout similar to the sample Main Menu shown in Figure 3-1.

  • Page 36: User Access

    READ/WRITE. READ-ONLY access allows you to view switch infor- mation, but not modify any operating parameters. READ/WRITE access allows you to both read and modify switch information. You are required to login with a password before obtaining READ/WRITE access. If no password is entered (press only the [Enter] key), you are logged in with READ-ONLY access.

  • Page 37: Factory Defaults

    Factory Defaults Table 3-1 lists the factory default settings for the switch configuration parameters. Each of these parameters can be changed via the console menus or Telnet. Table 3-1. Factory Default Settings Parameter Active Aging Time Auto-negotiation Enable Broadcast Cutoff Rate...

  • Page 38: Menu Hierarchy

    Menu Hierarchy Figure 3-2 shows the ELS100-24TX switch user interface menu hierarchy. System SNMP Configuration Menu Configuration System Name Menu System Location System Contact IP Address Subnet Mask Default Gateway BootP/DHCP Enable Screen Timeout (minutes) Password Terminal Baud Rate Terminal Hardware Flow Control...

  • Page 39: Main Menu

    Logs out of the console interface. Once you logout, you must enter a password before you can access the console interface again. Reset Performs a software reset of the switch by restarting the system software and reloading all operating parameters. 9032579-03 Access Control: READ/WRITE...

  • Page 40: System Configuration Menu

    System Configuration Menu The System Configuration Menu enables modification of system-level switch configuration parameters. Select a from the Main Menu to view the System Configuration Menu. Figure 3-4 shows the System Configuration Menu and the accompanying table describes the System Configuration Menu.

  • Page 41: Snmp Configuration Menu

    SNMP Configuration Menu The SNMP Configuration Menu allows you to modify SNMP-related configuration parameters. Select a from the System Configuration Menu to view the SNMP Configuration Menu. Figure 3-5 shows the SNMP Configuration Menu and accompanying table describes the SNMP Configuration Menu.

  • Page 42: Switch Configuration Menu

    Switch Configuration Menu The Switch Configuration Menu allows you to modify switching-related configuration parameters. Select b from the Main Menu to view the Switch Configuration Menu. Figure 3-6 shows the Switch Configuration Menu and the accompanying table describes the Switch Configuration Menu.

  • Page 43: Forwarding Table Configuration Menu

    The MAC address of each forwarding table entry is displayed along with its type, disposition, and associated port number. Select a from the Switch Configuration Menu to view the Forwarding Table Configuration Menu. Figure 3-7 shows the Forwarding Table Configuration Menu and the accompanying table describes the Forwarding Table Configuration Menu.
  • Page 44 Forwarding Table Configuration Menu (continued) Selection Description Next Page Displays the next page of the forwarding table. Previous Page Displays the previous page of the forwarding table. First Page Displays the first page (top) of the forwarding table. Last Page Displays the last page of the forwarding table.

  • Page 45: Spanning Tree Configuration Menu

    Spanning Tree Configuration Menu The Spanning Tree Configuration Menu allows you to view and modify Spanning Tree parameters. Select b from the Switch Configuration Menu to view the Spanning Tree Configuration Menu. A letter identifies selections that can be modified. All other fields are read-only. Figure 3-8 shows the Spanning Tree Configuration Menu and the accompanying table describes the Spanning Tree Configuration Menu.
  • Page 46 Bridge Priority 32 ELS100-24TX User Interface Description Allows you to enable (Yes) or disable (No) the global Spanning Tree operation on the switch. Provides access to the Spanning Tree Port Configura- tion Menu. The time interval between the sending of Configura- tion BPDUs by the bridge, if it is root (1-10 second range).

  • Page 47: Spanning Tree Port Configuration Menu

    Figure 3-9. Spanning Tree Port Configuration Menu Field Description Port ID A unique identifier for a port on the bridge (switch). Port Name The administrative name assigned to the port. Path Cost The contribution of the path through this port, when it is the root port, to the total path cost from this bridge to the root bridge.

  • Page 48: Spanning Tree Port #N Configuration Menu

    Spanning Tree Port #n Configuration Menu The Spanning Tree Port #n Configuration Menu allows you to view Spanning Tree Port Configuration information for an individual port. Select a from the Spanning Tree Port Configuration Menu to view the Spanning Tree Port # n Configuration Menu. Figure 3-10 shows the Spanning Tree Port # n Configuration Menu and the accompanying table describes the Spanning Tree Port # n Configuration Menu.

  • Page 49: Vlan Configuration Menu

    VLAN Configuration Menu The VLAN Configuration Menu allows you to configure the operation of virtual LANs (VLANs) in the switch. Select c from the Switch Configuration Menu to view the VLAN Configuration Menu. Figure 3-11 shows the VLAN Configuration Menu and the accompanying table describes the VLAN Configuration Menu.

  • Page 50: Vlan Menu

    VLAN Menu The VLAN Menu displays the configuration of VLANs in the switch and allows access to the VLAN #n Configuration Menu to create and configure VLANs. Select b from the VLAN Configuration Menu to view the VLAN Menu. Figure 3-12 shows the VLAN Menu and the accompanying table describes the VLAN Menu.

  • Page 51: Vlan #N Configuration Menu

    VLAN #n Configuration Menu The VLAN #n Configuration Menu allows you to configure a name for a specific VLAN, add or remove a port in the VLAN, and add or remove an egress port in the VLAN. Select c from the VLAN Menu to view the VLAN #n Configuration Menu.

  • Page 52: Vlan Port Menu

    VLAN Port Menu The VLAN Port Menu displays a table of VLAN configuration information on a per port basis and allows you to modify the VLAN Port Type. Select c from the VLAN Configuration Menu to view the VLAN Port Menu. Figure 3-14 shows the VLAN Port Menu and the accompanying table describes the VLAN Port Menu.

  • Page 53: Class Of Service Configuration Menu

    The Class of Service Configuration Menu allows you to configure Class of Service settings for the system as well as to set the Class of Service for VLAN tagged frames. Select d from the Switch Configuration Menu to view the Class of Service Configuration Menu. Figure 3-15 shows the Class of Service Configuration Menu and the accompanying table describes the Class of Service Configuration Menu.

  • Page 54: Port Priority Menu

    Port Priority Menu The Port Priority Menu allows you to modify and display a table which shows priority queuing configuration information on a per port basis. Select c from the Class of Service Configuration Menu to view the Port Priority Configuration Menu. Figure 3-16 shows the Port Priority Configuration Menu and the accompanying table describes the Port Priority Configuration Menu.

  • Page 55: Port Menu

    Port Menu The Port Menu allows you to display information for each port in a table format, as well as to access the Port Configuration Menu. You can also refresh the screen information. Select c from the Main Menu to view the Port Menu.

  • Page 56: Port Configuration Menu

    Port Configuration Menu The Port Configuration Menu allows you to configure port settings for a specific port. Select c from the Port Menu to view the Port Configuration Menu. Figure 3-18 shows the Port Configuration Menu and the accompanying table describes the Port Configuration Menu. PORTS 1-5 CONFIGURATION a Port Name b.

  • Page 57: Switch Statistics Screen

    Switch Statistics Screen The Switch Statistics Screen provides a summary display of port-level statistics, and provides access to the Port Statistics screens. You can also clear or refresh the statistics. Select d from the Main Menu to view the Switch Statistics Screen. Figure 3-19 shows the Switch Statistics Screen and the accompanying table describes the Switch Statistics Screen.

  • Page 58: Switch Summary Screen

    Switch Summary Screen The Switch Summary Screen allows you to display sum total statistics for all ports of the switch. You can also clear or refresh the statistics. Select s from the Switch Statistics Screen to view the Switch Summary screen.

  • Page 59: Port Statistics Screen

    Port Statistics Screen The Port Statistics Screen allows you to display statistics for each port on the switch. Many of these statistics correspond to the Statistics group of RMON. You can also refresh or clear the statistics. Select s from the Switch Statistics Screen to view the Port Statistics screen.
  • Page 60 Figure 3-21 Port Statistics Screen (continued) Field Multicasts Transmitted Multicasts Received Bytes Transmitted Bytes Received Pause Frames Transmitted Pause Frames Received Collisions Late Collisions CRC/Alignment Errors Undersized Frames Oversized Frames Fragments Jabbers 64 Byte Frames 65 to 127 Byte Frames 128 to 255 Byte Frames 256 to 511 Byte Frames 512 to 1023 Byte Frames...

  • Page 61: General Information Screen

    The version of system software currently operating on the switch. The serial number of the switch. The base MAC address of the switch (port 1 address). The number of minutes the switch has been operational since the last power cycle or reset.

  • Page 62: Download Software Menu

    Download Software Menu The Download Software Menu allows you to set up and initiate a software download. Select f from the Main Menu to view the Download Software Menu. Figure 3-23 shows the Download Software Menu and the accompanying table describes the Download Software Menu. DOWNLOAD SOFTWARE a.

  • Page 63: Save Current Configuration

    Save Current Configuration The Save Current Configuration screen ensures that all changes made to switch via the console menus will be stored in the event ELS100-24TX of power outages or power cycles. To save your current configuration, do the following: Select g from the Main Menu to view the Save Current Configuration screen.

  • Page 64: Reset

    The Reset screen allows you to restore the latest saved configuration or system defaults if the system configuration has not been saved. To reset the switch, do the following: Select j from the Main Menu to view the Reset screen.

  • Page 65: Configuring & Monitoring The Switch

    Setting password protection for the switch to prevent unauthorized access to console menus • Assigning an IP address for the switch if you plan to manage the switch using SNMP, or if you use Telnet to access the switch •...

  • Page 66: Setting Password Protection

    Menu. A setting of “0” permits the console menus to remain available indefinitely. Assigning an IP Address To assign an IP address to the switch, do the following: Select System Configuration Menu from the Main menu. Select IP address from the menu and enter the IP address.

  • Page 67: Checking Network Configuration Status

    Connecting via Telnet You can connect to the ELS100-24TX switch from a remote location using the Telnet application. This application allows you to establish in-band access to the console menus.

  • Page 68: Viewing Switch Statistics

    Viewing Switch Statistics To view switch statistics, do the following: Select Switch Statistics Screen from the Main Menu. The screen lists the main statistical counts for all ports on the switch simultaneously. Select Switch Summary from the Switch Statistics Screen.

  • Page 69: Downloading A Software Upgrade

    Downloading a Software Upgrade You can upgrade the operational software in the ELS100-24TX switch without physically opening the switch or being in the same location. The software storage sector in the flash memory of the switch is reprogrammable, allowing you to easily download software feature enhancements and problem fixes to the switch from a local or remote location.

  • Page 70: Downloading Via Tftp

    Downloading Via TFTP To perform a TFTP download, you must first configure the ELS100-24TX switch. This consists of programming the switch with an IP address, if this has not already been done, and entering the IP address of the TFTP server and the name of the upgrade file.

  • Page 71: Configuring Vlans

    To configure VLANs, do the following: Select Switch Configuration Menu from the Main Menu. Select VLAN Configuration Menu. Turn the global switch VLAN operation on or off by toggling the VLAN Enable option by pressing a. Select VLAN Menu. The VLAN Menu displays. This menu displays the current configuration of VLANs in the system.

  • Page 72: Configuring Class Of Service

    Select Class of Service Configuration Menu from the Switch Configuration Menu. Turn the global switch Class of Service operation on or off by toggling the Class of Service Enable option by pressing a. Select Priority Threshold and type a number between 0 and 7.

  • Page 73: Configuring The Forwarding Table

    MAC addresses, allowing you to maintain the efficiency and security of your network. You can search for specific MAC addresses by the address itself or by port number. The switch learns addresses dynamically from incoming packets and builds a table of these addresses along with their associated ports.

  • Page 74: Configuring Broadcast Throttling

    Select Broadcast Cutoff Rate, enter the rate value, and press [Enter]. Valid values are in the range from 100 to 500,000 per second. This rate value is applied to each grouping of 8 ports on the switch. A set- ting of 500,000 essentially disables this feature.

  • Page 75: Setting A Default Gateway

    When this option is enabled, the switch first tries to obtain an IP address from a DHCP server. If this fails, the switch tries to obtain an IP address from a BootP server. If this fails, the switch uses a previously configured IP address, if one exists.

  • Page 77: Snmp Management

    Managed entities supporting SNMP typically contain software, which runs locally on the device and is referred to as an agent. In Figure 5-1, software in an ELS100-24TX switch functions as an agent, monitoring and controlling the functionality of the switch.

  • Page 78: Mib Objects

    RFC 1213 provides management of switch system-level parameters, including TCP/IP protocol-related statistics, IP addressing, routing table information, and interface statistics for each switch port. MIB-II is the standard MIB defined by RFC 1213. All agent devices operating SNMP are required to support at least part of MIB-II.

  • Page 79: Rfc 1398 (Ethernet Mib)

    RFC 1398 (Ethernet MIB) RFC 1398 provides management and monitoring for the Ethernet-specific aspects of each port on the switch. This is the Ethernet-specific statistics subgroup of the MIB-II Transmission group. This group provides a set of statistics related to Ethernet’s physical level operation. Specifically, error and collision-related statistics are presented.

  • Page 80: Cabletron Proprietary Mib Extensions

    MIB-II. Areas covered in this MIB include various system, switch, and port level information. System information MIB variables are shown in Table 5-1, switch information variables in Table 5-2, and port variables in Table 5-3. Table 5-1. System Information Variables...
  • Page 81 SwitchTrapRcvr4 SwitchTrapCommunity4 SwitchPortMirroringStatus 9032579-03 Description IP address of the switch, used for management. Subnet mask corresponding to the SwitchIPAddress. Aging tick period in seconds by which addresses in the forwarding table are aged out. Enable/disable operation of Spanning Tree on the switch.
  • Page 82 Enable/disable global traffic priority in the switch. Priority threshold level (0-7) in the switch which defines switch traffic to be high or low priority. Priority table indexed by SwitchPriorityPortId. Port number or ID. Priority level (0-7) assigned to untagged traffic entering the associated port.

  • Page 83: Compiling Mib Extensions

    PortSpeed PortAutonegEnable PortFlowControlEnable Compiling MIB Extensions: Cabletron Website The MIBs supported by the ELS100-24TX switch must be compiled into the SNMP network management platform before the switch can be managed. The supported MIBs are available using Cabletron’s website http://www.cabletron.com The four standard MIB specifications listed above with which the ELS100-24TX switch is compliant are generally available with the SNMP management platform.

  • Page 85: Appendix A. Technical Specifications

    APPENDIX A. TECHNICAL SPECIFICATIONS General Standards Compliance IEEE 802.1D Transparent Bridging Specifications (ISO/IEC 10038) IEEE 802.1p Traffic Class Expediting and Dynamic Multicast Filtering IEEE 802.1Q Virtual Bridged Local Area Networks IEEE 802.2 Local Area Networks, Logical Link Control (LLC) IEEE 802.3 CSMA/CD 9 (ISO/IEC 8802-3) IEEE 802.3i 10Base-T (ISO/IEC 8802-3, clause 14) IEEE 802.3u 100Base-TX (ISO/IEC 8802-3, clause 25) IEEE 802.3x Flow Control...

  • Page 86: Electrical Specifications

    Electrical Specifications Input voltage: Input frequency: Maximum power consumption: Physical Height: Length: Width: Weight: Microprocessor Type: Speed: Memory Processor DRAM: Packet Buffer Memory: Flash Memory: 72 Technical Specifications 100-240 VAC 50-60 Hz 75 VA 1.75 in. (4.4 cm) 16.0 in. (40.6 cm) 17.1 in.

  • Page 87: Port Specifications

    Table A-1 shows the console port pin assignments. Table A-1. RS-232 Console Port Pin Assignments 10Base-T and 100Base-TX Ports The ELS100-24TX switch provides IEEE 802.3u auto-negotiation on its 10Base-T/100Base-TX ports for 10/100 speed and full/half duplex operation. Table A-2 shows the 10Base-T/100Base-TX pinouts. These ports are wired MDI-X.

  • Page 88: Mdi/Mdi-X Crossover Cable Wiring

    Figure A-1 shows the wiring scheme for implementing a crossover cable if needed for connection to the switch’s 10Base-T or 100Base-TX ports. Such a cable may be required when connecting the switch to another switch or a hub device. Figure A-1. External Crossover Cable Wiring...

  • Page 89: Power Cord Set Requirements

    Power cord sets for use in other countries must meet the requirements of the country where you use the switch. For more information on power cord set requirements, contact your Cabletron Systems Support Representative. General Requirements The requirements listed below are applicable to all countries: •...
  • Page 90 Table A-1. Power Cord Set Requirements by Country Country Australia Austria Belgium Canada Denmark Finland France Germany Italy Japan Netherlands Norway Sweden Switzerland United Kingdom United States The note column includes a number. Associate this number with the corresponding notes listed after the table to obtain specific power standards and requirements.

  • Page 91: Appendix B. Spanning Tree Concepts

    Spanning Tree Features The ELS100-24TX switch meets the requirements of the Spanning Tree Protocol (STP) by performing the following functions: •...

  • Page 92: Spanning Tree Protocol In A Network

    If the connection between A and B goes down, the link between A and C becomes active, thereby establishing a path between A and B through switch C. Additionally, if the connection between B and C goes down, the link between A and C becomes active, establishing a path between B and C through switch A.

  • Page 93: Spanning Tree Protocol Operation

    Table B-1. Spanning Tree Protocol Defaults Parameter Description Bridge Unique MAC group address, recognized by all bridges Group in the network. Address Bridge Identifier for each bridge. This parameter consists of Identifier two parts: a 16-bit bridge priority and a 48-bit network adapter address.

  • Page 94: Communicating Between Bridges

    Communicating Between Bridges Periodically, all devices running the Spanning Tree Protocol on a network transmit packets to each other “in care of” the Bridge Group Address which all bridges share. When a bridge receives a frame sent to the Bridge Group Address, the bridge’s Spanning Tree Protocol processes the packet.

  • Page 95: Appendix C. Flow Control

    Figure C-1. Flow Control for Full and Half Duplex Applications Each port of the switch has a transmit queue which buffers frames to be sent out on that port. In this example, large amounts of data are being sent from Workstation A (connected to port X) and other ports on the switch to Workstation B (connected to port Y).The queue on port Y starts...
  • Page 96 For the full duplex pause frame mechanism to work, the device connected to the switch port must also support IEEE 802.3x flow control. Flow Control is configurable per port in the Port Configuration Menu of the console menu or via SNMP.

  • Page 97: Appendix D. Virtual Lans (Vlans)

    In the example in Figure D-1 below, the workstations attached to the top switch are members of the same two VLANs as the workstations attached to the bottom switch. The 802.1Q tags are used to carry VLAN information in the frames traveling between the two switches.

  • Page 98: Els100-24Tx Vlan Configuration

    VLAN operation on the ELS100-24TX is disabled by default. When VLANs are enabled, all frames are transferred internally through the switch with a VLAN tag. This tag may already be on the frame entering the switch, or added to the frame by the switch. VLAN information already existing on frames entering the switch is automatically handled by the switch.

  • Page 99: Vlan Egress Ports

    VLAN tagged frames are not allowed to enter or exit an Access port. If a tagged frame enters the switch on an Access port, the switch will drop the frame. End-user stations which do not support 802.1Q tags should be attached to ports on the switch configured as Access ports.

  • Page 100: Vlan Hybrid Ports

    VLAN Hybrid Ports A VLAN Hybrid port is used to connect one or more VLAN-aware or VLAN-unaware devices to the switch. Both tagged and untagged frames can be received and transmitted on Hybrid ports. Egress ports should typically be configured as Hybrid ports.
  • Page 101 In Example 3 in Figure D-3B, an untagged frame arrives at the left port (1). The switch tags the frame with the PVID for VLAN X (2). Since the destination MAC address has already been learned as a tagged station on VLAN X on the outgoing port, the frame is sent out with a VLAN X tag.

  • Page 102: Vlan Application Example

    A network administrator can use VLANs to define user groups regardless of the physical LAN segment to which they are connected. The use of Hybrid and Access links can further refine traffic flow in a multi-switch environment. Figure D-4 shows the combination of both Hybrid and Access links used in a network with three different VLANs.

  • Page 103: Appendix E. Class Of Service

    • normal As traffic enters the switch, it is assigned to one of the two priority levels according to information located in the 802.1Q header tag of the frame (see Appendix D, “Virtual LANs”) or according to the incoming port number.
  • Page 104 Figure E-1 shows priority queuing operating within a switch. Frames entering the switch through ports 1 and 4 are tagged as normal traffic and placed in a normal priority queue on the outbound port. Frames entering through ports 2 and 5 are tagged as high priority traffic and placed in a high priority queue on the outbound port.

  • Page 105: Appendix F. Acronyms & Abbreviations

    APPENDIX F. ACRONYMS & ABBREVIATIONS Term 10Base-T 100Base-TX ANSI ASIC BootP BPDU CAT5 CSMA/CD DHCP ICMP IEEE PVID RMON 9032579-03 Definition 10 Mbps twisted-pair Ethernet 100Mbps twisted-pair Ethernet American National Standards Institute Application Specific Integrated Circuit Bootstrap Protocol Bridge Protocol Data Unit Category 5 Class of Service Cyclic Redundancy Check...
  • Page 106 Term Definition Receive Data SNMP Simple Network Management Protocol Spanning Tree Protocol TCP/IP Transmission Control Protocol/Internet Protocol TFTP Trivial File Transfer Protocol Transmit Data Unshielded Twisted Pair VLAN Virtual Local Area Network Wide Area Network 92 Acronyms & Abbreviations ELS100-24TX...

  • Page 107: Index

    802.1p, 89 configuring, 58 Class of Service Configuration Menu, 39 client/server network application, 11 communication settings, 17 community names, 27, 53 configuring the switch common tasks, 51 connecting network cables, 20 console port, 3, 17, 73 connecting to, 17 defined, 3...
  • Page 108 Microprocessor, 72 mirrored port, 28 mirroring port, 28 modes of access read-only and read/write, 22 mounting ears, 15, 16 Mounting the Switch, 14, 15, 16 rack, 16 table or shelf, 14 wall, 15 network configuration status, 53 non-volatile parameter storage, 7...
  • Page 109 Switch Summary Screen, 44 System Configuration Menu, 25, 26 Telnet, 21 connecting, 53 terminal, 7, 17, 91 Test LED, 19 defined, 3 TFTP download, 56 TFTP file name, 48 Unshielded Twisted Pair (UTP), 20 Up Time, 47 User Access, 22...

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