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Cabletron Systems ELS100-24TXG Installation And User Manual

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SmartSTACK 100
ELS100-24TXG

ETHERNET SWITCH

INSTALLATION
AND
USER GUIDE

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Summary of Contents for Cabletron Systems ELS100-24TXG

  • Page 1: Ethernet Switch

    SmartSTACK 100 ELS100-24TXG 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 re- strictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, 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

    Mounting the Switch on a Table or Shelf ..... . . 14 Mounting the Switch on a Wall ....... 15 Mounting the Switch in a Rack .
  • Page 8 1000Base-X Gigabit Ethernet Ports ......21 3. ELS100-24TXG USER INTERFACE....... 23 Overview .
  • Page 9 Configuring Spanning Tree Parameters ......58 Configuring VLANs ........59 Configuring Class of Service.
  • Page 10 VLANs and Frame Tagging ....... . . 83 ELS100-24TXG VLAN Configuration ......84 VLAN ID .

  • Page 11: Preface

    PREFACE Purpose This guide provides information about the features and applications of the Cabletron ELS100-24TXG 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: Other Conventions

    Instructions for making connections and powering up the switch are provided as well. Chapter 3. ELS100-24TXG 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 13 Appendix E. Class of Service: Describes how the traffic Class of Service features can be used to assign mission-critical data a higher priority through the switch by delaying less critical traffic during periods of congestion. Appendix F. Acronyms and Abbreviations: Provides definitions for a list of common acronyms and abbreviations used within the user guide and the networking industry.

  • Page 15: Product Overview

    Network management can also be performed in-band using the popular TCP/IP application, Telnet. In addition, a serial console port allows out-of- band management using a PC or a terminal. The ELS100-24TXG switch is desktop or rack-mountable. LEDs on the front panel provide information about the operating status of the switch.

  • Page 16: Features

    - 2 1000Base-X Gigabit Ethernet ports using modular GBIC transceivers • Architecture: - 8-port 10/100 and 1-port Gigabit Ethernet switch ASICs in a distributed switching architecture - 4.2 Gbps internal switching fabric - 12 MB packet buffering (512 KB/port) for 10/100 ports - 16 MB packet buffering (8 MB/port) for Gigabit Ethernet ports - 4096 MAC address forwarding table per port;...

  • Page 17: Front Panel

    - Upgrades using the front panel console port or in-band with TFTP Front Panel Figure 1-1 shows the front panel of the Cabletron ELS100-24TXG. Table 1-1 defines the ELS100-24TXG front panel components. Figure 1-1. ELS100-24TXG Front Panel Table 1-1. Front Panel Components...
  • Page 18 10/100 speed 10/100 speed Full/half duplex Full/half duplex Figure 1-4. Port LEDs LED Mode Button Pressed 4 Product Overview Link LEDs Activity LEDs Link Link Activity Activity Link Link Activity Activity 10/100 speed Full/half duplex 10/100 speed Full/half duplex ELS100-24TXG...

  • Page 19: Rear Panel

    Duplex LED On: Indicates the port is in the full duplex mode. Duplex LED Off: Indicates the port is in the half duplex mode. Rear Panel Figure 1-5 shows the ELS100-24TXG rear panel and Table 1-3 defines the rear panel components. Figure 1-5. ELS100-24TXG Rear Panel Table 1-3.

  • Page 20: Feature Summaries

    To minimize the possibility of dropping frames on congested ports, the ELS100-24TXG switch provides 512 KB per 10/100 port and 8 MB per Gigabit Ethernet port of dynamically allocated frame buffering. This buffer space is used to queue packets for transmission on congested networks.

  • Page 21: Software Download

    Flash memory. These values are retained when the switch experiences power interruptions or is powered down for normal maintenance. Configuration and Management Interfaces The ELS100-24TXG switch can be managed using any of the following three methods: • Serial console, out-of-band An RS-232 connection, using a DB-9 connector, is supported for out-of- band switch management.

  • Page 22: Rmon

    SNMP management station. The ELS100-24TXG supports four of the nine groups of RMON defined for Ethernet networks on a per port basis. Specifically, these are: •...

  • Page 23: Broadcast Throttling

    Auto-negotiation is configurable in the Port Configuration Menu of the console menus or via SNMP. Broadcast Throttling The ELS100-24TXG has the capability to throttle (or limit) the flooding of packets through the switch. 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.

  • Page 24: Flow Control

    The ELS100-24TXG 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 ELS100-24TXG switch can be configured to provide 200 Mbps full duplex Fast Ethernet connections to servers by connecting each to a dedicated switch port (Figure 1-6). 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

    Local Backbone Application The ELS100-24TXG switch can be used in a local backbone application, connecting network segments together and providing file-server access (Figure 1-6). Workgroup hubs are provided with a single connection to the switch while servers are put on dedicated 100Mbps ports. Routers and other networking devices can connect off of the switched backbone as well.

  • Page 27: Installation

    • Environmental Install the ELS100-24TXG switch in a dry area, with adequate air cir- culation. Avoid placing the switch in direct sunlight or near other heat sources, such as hot-air vents. For temperature and humidity speci- fications, see Appendix A, “Technical Specifications.”...

  • 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 cord. 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

    Any cable connected to the console port must be shielded to comply with emissions regulations and requirements. To connect the ELS100-24TXG console port to a terminal, do the following: Connect a terminal to the console port using an interface cable (Figure 2-3).

  • 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: Network Cable Requirements

    Table 2-2 specifies the fiber types, bandwidth requirements, and length constraints for the various Gigabit Ethernet fiber interfaces on the ELS100-24TXG. The type of GBIC module installed determines the interface type. The GBIC, along with the type of fiber installed, determines the distance support.

  • Page 34: 10Base-T/100Base-Tx Ports

    10Base-T, 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 ELS100-24TXG 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: 1000Base-X Gigabit Ethernet Ports

    The fiber optic Gigabit Ethernet GBICs use dual SC connectors. Figure 2- 6 shows a dual SC connector being inserted into a Gigabit Ethernet port on the ELS100-24TXG. Figure 2-6. Inserting a Dual SC Connector into a Port The 1000Base-X Gigabit Ethernet ports interface to different media types depending on the GBIC module installed.

  • Page 37: Els100-24Txg 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 38: User Access

    READ/WRITE. READ-ONLY access allows you to view switch information, 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 39: 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 40: Menu Hierarchy

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

  • Page 41: Main Menu

    Switch Configura- Provides access to information and parameters affecting the tion Menu function of the switch, i.e. the movement of packets through the switch. For example, you can configure Forwarding Table, Spanning Tree, and virtual LANs (VLANs). Port Menu Shows the configuration of the individual ports on the switch and allows you to modify switch port operation.

  • Page 42: 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 43: Snmp Configuration Menu

    The IP address of trap destination #4 where SNMP trap messages are forwarded. Community Name #4 The SNMP community name to use for traps forwarded to trap destination #4. 9032947 Access Control: READ/WRITE private public 000.000.000.000 public 000.000.000.000 public 000.000.000.000 public 000.000.000.000 public ELS100-24TXG User Interface 29...

  • Page 44: 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 45: 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 46 Performs a search by port number and posts the search results at the top of the screen. Search by MAC Performs a search by MAC Address and posts the search Address results at the top of the screen. 32 ELS100-24TXG User Interface ELS100-24TXG...

  • Page 47: 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 48 Hello Time (seconds) Forward Delay (sec- onds) Max Age (seconds) Bridge Priority 34 ELS100-24TXG 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 Con- figuration Menu.

  • Page 49: 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 50: Spanning Tree Port #N Configuration Menu

    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 (1-65535 range). Port Priority The relative priority of the port on the bridge (0-255 range). 36 ELS100-24TXG User Interface Access Control: READ/WRITE DISABLED 000000000000 32768...

  • Page 51: 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 52: 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 53: Vlan #N Configuration Menu

    Allows you to enter a port in the VLAN. Allows you to remove a port in the VLAN. Allows you to add a VLAN Egress Port. Allows you to remove a VLAN Egress Port. ELS100-24TXG User Interface 39...

  • Page 54: Vlan Port Menu

    Displays the first page of the table. Last Page Displays the last page of the table. Modify Port Type Allows you to modify the port type (either Hybrid or Access). 40 ELS100-24TXG User Interface Access Control: READ/WRITE TYPE ACCESS ACCESS...

  • Page 55: 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 56: Port Priority Menu

    Last Page Displays the last page of the table. Configure Allows you to configure the priority default for a specific port (0-7 number range). 42 ELS100-24TXG User Interface Access Control: READ/WRITE PRIORITY DEFAULT f. First Page l. Last Page ELS100-24TXG...

  • Page 57: Port Menu

    (See Section 4). 9032947 Access Control: READ/WRITE AUTO FULL NEGOTIATED DUPLEX SPEED TYPE CONTROL f. First Page l. Last Page x. Previous Menu ELS100-24TXG User Interface 43 PORT FLOW 100 100TX 100 100TX 100 100TX 100 100TX 100 100TX 100 100TX...

  • Page 58: Port Configuration Menu

    Allows you to set the operational speed for the port(s). For 10/ 100 ports, this parameter can be set to either 10 or 100. This parameter cannot be changed for Gigabit Ethernet ports and is always set at 1000, corresponding to 1000Mbps. 44 ELS100-24TXG User Interface Access Control: READ/WRITE ELS100-24TXG...

  • Page 59: 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 60: 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 61: 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 62 256 to 511 Byte Frames 512 to 1023 Byte Frames 1024 to 1518 Byte Frames Selection Refresh Clear 48 ELS100-24TXG User Interface Description Total number of multicast frames transmitted on the port. Total number of multicast frames received on the port.

  • Page 63: 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 ad- dress). The number of minutes the switch has been oper- ational since the last power cycle or reset.

  • Page 64: Download Software Menu

    Figure 3-23. Download Software Menu Selection TFTP Server IP Address TFTP File Name Start TFTP Download Start XMODEM Download 50 ELS100-24TXG User Interface Access Control: READ/WRITE 1.2.3.4 Description The IP address of the TFTP server. The file name to be downloaded from the TFTP server (maximum of 80 characters).

  • Page 65: Save Current Configuration

    Save Current Configuration The Save Current Configuration screen ensures that all changes made to the ELS100-24TXG switch via the console menus will be stored in the event 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 66: Reset

    Reset The Reset screen allows you to perform a switch hardware reset. You are first prompted as to whether or not to save the current switch configuration. To reset the switch, do the following: Select j from the Main Menu to view the Reset screen.

  • Page 67: Configuring & Monitoring The Switch

    The switch console menus allow you to modify default switch settings and configure the switch for network management. They also allow you to monitor switch performance and status. See Section 3, “ELS100-24TXG User Interface,” for an overview of the menu hierarchy and a description of all menus.

  • Page 68: Setting Password Protection

    Setting Password Protection The ELS100-24TXG switch is factory-configured with access rights to the console menus set to READ/WRITE. This setting allows anyone to use the console menus to modify any operational parameter. To protect the configuration of the switch from unauthorized modification, you should enable password protection to the console menus.

  • Page 69: Checking Network Configuration Status

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

  • Page 70: 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 71: Downloading A Software Upgrade

    TFTP protocol. A TFTP download is much faster than a serial download, requiring only a few seconds, and can be used to upgrade an ELS100-24TXG switch that is not physically proximate. The disadvantage is that this method requires a TFTP server and additional setup.

  • Page 72: Downloading Via Tftp

    Configuring Spanning Tree Parameters The ELS100-24TXG switch supports the IEEE 802.1D Spanning Tree Protocol. This protocol allows redundant connections to be created between LAN segments for purposes of fault tolerance. Two or more...

  • Page 73: 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 configura- tion of VLANs in the system.

  • Page 74: 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 enter a number between 0 and 7. This number represents the threshold between high and low priority traffic passing through the switch.

  • Page 75: 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 76 Discard, which drops packets destined for a specific MAC address (and thus provides a security function by blocking certain packets). • Local, which is for packets destined for the switch itself (such as a “local” SNMP management packet). To configure the forwarding table, do the following: Select Switch Configuration Menu from the Main Menu.

  • Page 77: Configuring Broadcast Cutoff Rate

    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 79: 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 ELS100-24TXG switch functions as an agent, monitoring and controlling the functionality of the switch.

  • Page 80: Mib Objects

    RFC 1493 - Definitions of Managed Objects for Bridges • RFC 1757 - Remote Network Monitoring Management Information Base The ELS100-24TXG switch also supports Cabletron proprietary MIB extensions. RFC 1213 (MIB-II) 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.

  • Page 81: Rfc 1398 (Ethernet Mib)

    RFC 1757 (RMON MIB) RFC 1757 is a group defined under MIB-II. This MIB provides management for the RMON aspects of the switch. The ELS100-24TXG switch supports four of the nine groups of RMON defined for Ethernet networks on a per port basis. For further information, see the subsection “RMON”...
  • Page 82 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 Variable Description SerialNo Serial number of the unit.
  • Page 83 The type of VLAN this port is operating as, either hybrid or access. 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.

  • Page 84: Compiling Mib Extensions: Cabletron Website

    PortAutonegEnable PortFlowControlEnable PortType Compiling MIB Extensions: Cabletron Website The MIBs supported by the ELS100-24TXG 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 ELS100-24TXG 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

    16.0 in. (40.6 cm) 17.1 in. (43.4 cm mountable in a 10.5 lb. (4.8 kg) Intel i960J series, 32 bit 33 MHz 4 MB 4 MB per 8 10/100 ports 8 MB per 1 Gigabit Ethernet port 2 MB ELS100-24TXG...

  • Page 87: Port Specifications

    Port Specifications Console Port Table A-1 shows the console port pin assignments. Table A-1. RS-232 Console Port Pin Assignments 10Base-T and 100Base-TX Ports Table A-2 shows the 10Base-T/100Base-TX pinouts. These ports are wired MDI-X. All undefined pins are not used. Table A-2.

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

    Figure A-1. External Crossover Cable Wiring Power Cord Set Requirements The wide-range input feature of the ELS100-24TXG Ethernet switch permits it to operate from any line voltage between 100 and 240 VAC. The power cord set (appliance coupler, flexible cord, and wall plug) you received with the switch meets the requirements for use in the country where you purchased the switch.

  • Page 89: Country-Specific Requirements

    Country-Specific Requirements Table A-3 lists the power cord set requirements by country and identifies the accredited agency within that country. Table A-3. Power Cord Set Requirements by Country Country Australia Austria Belgium Canada Denmark Finland France Germany Italy Japan Netherlands Norway Sweden Switzerland...
  • Page 90 Japanese Dentori Law. Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm2 conductor size. Wall plug must be a two-pole grounding type with a Japanese Industrial Standard C8303 (15A, 125V) configuration. 76 Technical Specifications ELS100-24TXG...

  • Page 91: Appendix B. Spanning Tree Concepts

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

  • Page 92: Spanning Tree Protocol In A Network

    Spanning Tree Protocol in a Network Figure B-1 illustrates the use of three ELS100-24TXG switches to establish an effective Spanning Tree configuration. Switches A, B and C are connected together in a redundant topology (more than one path between two points). 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.

  • 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

    Forwarding: A port in this state is participating in the transmission of frames. • Disabled: A port in this state does not participate in the transmission of frames or the operation of the spanning tree process. 80 Spanning Tree Concepts ELS100-24TXG...

  • 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 The ELS100-24TXG Port Statistics Screen indicates the number of pause frames that have been sent, indicating the number of times full duplex flow control has occurred. For the full duplex pause frame mechanism to work, the device connected to the switch port must also support IEEE 802.3x flow control.

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

    Figure D-1. Two Switch VLAN Configuration If the ELS100-24TXG is so configured, and, if the frame does not already contain a tag, a VLAN identifier is placed in a tag which is appended to frames as they are received by the switch.

  • Page 98: Els100-24Txg Vlan Configuration

    ELS100-24TXG VLAN Configuration VLAN operation on the ELS100-24TXG 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.

  • Page 99: Vlan Egress Ports

    VLAN are normally tagged. VLAN Access Ports Individual ELS100-24TXG ports can be configured as one of two types for the purpose of VLAN configuration: Access or Hybrid. A VLAN Access port is used to connect one or more VLAN-unaware devices to the switch.

  • 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

    Figure D-4 shows the combination of both Hybrid and Access links used in a network with three different VLANs. Workstations are typically connected to the ELS100-24TXG via Access links. On the internal corporate network (backbone), VLAN tags are used to identify the VLAN association of frames.

  • Page 103: Appendix E. Class Of Service

    APPENDIX E. CLASS OF SERVICE Class of Service support on the ELS100-24TXG allows you to assign mission-critical data a higher priority through the switch by delaying less critical traffic during periods of congestion. Higher priority traffic through the switch is serviced first before lower priority traffic. The Class of Service capability of the ELS100-24TXG switch is implemented by a priority queuing mechanism.
  • 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 Definition 10Base-T 10 Mbps twisted-pair Ethernet 100Base-TX 100Mbps twisted-pair Fast Ethernet 1000Base-X 1000Mbps Gigabit Ethernet 1000Base-SX 1000Mbps Gigabit Ethernet, short-wave laser over multi-mode fiber 1000Base-LX 1000Mbps Gigabit Ethernet, long-wave laser over single- or multi-mode fiber 1000Base-CX 1000Mbps Gigabit Ethernet, over shielded, balanced copper...
  • Page 106 Remote Monitoring Receive Data SNMP Simple Network Management Protocol Spanning Tree Protocol TCP/IP Transmission Control Protocol/Internet Proto- TFTP Trivial File Transfer Protocol Transmit Data Unshielded Twisted Pair VLAN Virtual Local Area Network Wide Area Network 92 Acronyms & Abbreviations ELS100-24TXG...

  • Page 107: Index

    802.1p, 97 configuring, 68 Class of Service Configuration Menu, 49 client/server network application, 19 communication settings, 25 community names, 37, 63 configuring the switch common tasks, 61 connecting network cables, 27 9032947 console port, 11, 25 connecting to, 25 defined, 11...
  • Page 108 SNMP, 15, 37, 63, 73, 74, 78 setting access, 63 SNMP Configuration Menu, 37 software version, 57 Spanning Tree, 14, 15, 66, 86, 87 Spanning Tree Configuration Menu, 41 Spanning Tree Parameters configuring, 66 Spanning Tree Port #n Configuration Menu, 44 ELS100-24TXG...
  • Page 109 Spanning Tree Port Configuration Menu, Spanning Tree Protocol defaults, 87 Standards Compliance IEEE, 79 store-and-forward, 14, 87, 100 Switch Configuration Menu, 35, 38 switch statistics, 64 Switch Statistics Screen, 35, 53 Switch Summary Screen, 54 System Configuration Menu, 35, 36 Telnet, 31...
  • Page 112 591-0046-03A...

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