SmartSTACK ELH100-12/24TX FAST ETHERNET HUB INSTALLATION AND USER GUIDE 9033060
Notice Only qualified personnel should perform installation procedures. NOTICE Cabletron Systems reserves the right to make changes in specifications and other information 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. The hardware, firmware, or software described in this manual is subject to change without notice.
Notice FCC NOTICE This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
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Notice If the Program is exported from the United States pursuant to the License Exception TSR under the U.S.
Notice DECLARATION OF CONFORMITY Application of Council Directive(s): Manufacturer’s Name: Manufacturer’s Address: European Representative Name: European Representative Address: Conformance to Directive(s)/Product Standards: Equipment Type/Environment: 89/336/EEC 73/23/EEC Cabletron Systems, Inc. 35 Industrial Way PO Box 5005 Rochester, NH 03867 Mr. J.
Table Of Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Message Formats . . . . . . . . . . . . . . . . .
3. ELH100-12/24TX User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hub Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Port Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Switch Module Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 MIB Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 RMON Browser . . . . . .
PREFACE Purpose This guide provides information about the features and applications of the Cabletron ELH100-12/24TX dual-speed hub as well as instructions for configuring and monitoring the hub.
Other Conventions This guide uses the following typographical conventions: • Initial Caps Menu titles and console menu selections. • [Enter] Used to designate the Enter or Return key. • ALL CAPS Used to designate fields within the console menus (Example: CONNECTION). • courier font Screen messages and user prompts. • Selection Describes a user-configurable user interface item. • Field Describes a read-only information item. Organization Chapter 1.
1. PRODUCT OVERVIEW Description This installation and user guide describes Cabletron’s ELH100-12/24TX Fast Ethernet hubs. These hubs provide the easiest method of upgrading your network to Fast Ethernet. There’s no need to replace your existing network infrastructure. Just add Cabletron’s hub to your network and attach any 10 or 100 Mbps device to any port on the hub.
The ELH100-12/24TX hub is desktop or rack-mountable. LEDs on the front panel provide information about the operating status of the hub. The back panel contains the power connector, redundant power connector, and stack connectors. The side panel includes two fans that maintain ventilation and cooling for internal hub components.
9033060 • Switch Architecture (for optional switch/media modules): - Bridges 10 and 100 Mbps repeater buses for the stack - 200 Mbps throughput - 2 MB packet buffering - Store-and-forward switching - Module: 4096 address forwarding table per segment - Forwarding: 14,880 packets-per-second (64 byte packets) @10 Mbps; 148,800 pps @100 Mbps - Filtering: 14,880 packets-per-second (64 byte packets) @10 Mbps; 148,800 pps @100 Mbps • Network Management: - SNMP compliant agent: MIB II (RFC 1213); Multi-segment
Front Panel Figure 1-1 shows the front panel of the Cabletron ELH100-24TX. Table 1-1 defines the ELH100-12/24TX front panel components. Figure 1-1. ELH100-24TX Front Panel X X X X X X X X X X X X ELH100-24TX Table 1-1. Front Panel Components Name Function PWR LED Lights steady green to indicate power is supplied to the hub. Off indicates no power is supplied to the hub. SWITCH LED Lights steady green to indicate that the Switch/Media Module is active.
Optional Modules Figure 1-2 shows the optional modules available for the Cabletron ELH100-12/24TX. Table 1-2 defines the optional module components. Figure 1-2. Optional Modules Table 1-2. Optional Module Components Module Components 10Base-T/100Base-TX Ports: Copper ports using RJ-45 connectors. Use either the MDI-X or MDI connector when attaching a device to this module. (See 10Base-T/100Base-TX Ports on page 24 for a detailed description of these ports.
Figure 1-3 shows the Collision, Activity, Full/Half duplex, and Link LEDs for the switch/media modules. These LEDs are positioned to the left of the ports. In addition, the 10Base-T/100Base-TX module includes a 100M LED to right of the ports to indicate speed (where On indicates that the port is operating at 100 Mbps, and Off indicates 10 Mbps). Figure 1-3. Port LEDs on the Switch/Media Modules Collision Activity Full/Half Link Table 1-3 defines the performance of the port LEDs on the optional modules.
Rear Panel Figure 1-4 shows the ELH100-12/24TX rear panel and Table 1-4 defines the rear panel components. Figure 1-4. ELH100-12/24TX Rear Panel Table 1-4. Rear Panel Components Name Function Power Connector Provides AC power to the switch. Redundant Power Connector This connector is provided for a redundant power unit (RPU) which can supply power to the hub if its primary power supply fails. (Refer to the manual provided with the RPU for further details.
A TFTP or XMODEM software download is invoked via the console menus. A TFTP download can also be invoked via SNMP or Web-based manager. Non-volatile Parameter Storage All important operating parameters, such as management data and port configurations, are stored in non-volatile Flash memory. These values are retained when the hub experiences power interruptions or is powered down for normal maintenance.
RMON RMON (Remote Monitoring) is a facility used to manage networks remotely while providing multi-vendor interoperability between monitoring devices and management stations. RMON is defined by an SNMP MIB. This MIB is divided into nine different groups, each gathering specific statistical information or performing a specific function. RMON-capable devices gather network traffic data and then store them locally until downloaded to an SNMP management station.
BootP The Bootstrap Protocol (BootP) provides for the capability of passing configuration information to hosts on a TCP/IP network. Using this process, network devices do not need to be configured before they can communicate using the TCP/IP protocol suite. The ELH100-12/24TX uses BootP to automatically configure IP address information without requiring access to the console menus. BootP operation is configurable using the System Configuration Menu of the console menus, the on-board Web agent, or via SNMP.
Using the ELH100-12/24TX hub in an application example for client/ server networks, users can be connected directly to the local network, regardless of whether they are operated at either 10 or 100 Mbps. Up to 144 connections can be supported by stacking up to 6 hubs. Being a Class II hub, additional 10Mbps or 100 Mbps hubs can be attached to the stack.
2. INSTALLATION Inspecting Your Shipment When you receive the shipment of your hub, check the package contents and make sure you have the following items: • ELH100-12/24TX dual speed Ethernet hub • Mounting ears and mounting screws • Four rubber feet • Stack cable • Power cord • This document Site Requirements Before you install the hub, make sure the site meets the following requirements: • Mounting Provide a flat table, shelf surface, or an optional 19 in. (48.3 cm) equipment rack.
Mounting the Hub or Stack on a Table or Shelf You can mount a standalone hub (or a stack of up to six hubs) on a table or shelf. Locate the hub (stack) in a position that 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 hub (stack) and that there is adequate space around the hub (stack) for ventilation and cooling. 1. The hub ships with four (4) rubber feet.
Mounting the Hub in a Rack The hub ships with two (2) multi-position mounting ears and four (4) mounting screws. The mounting screws are used to attach the mounting ears to the hub. Once the ears are attached to the hub, you will need to provide appropriate screws to mount the hub in a rack. Figure 2-1 shows the orientation of the mounting ears for attaching the ears to the hub for a rack mount application. Mount the hub with the front panel facing forward. Do the following: 1.
Connecting Hubs to the Stack’s Backplane The hub ships with a stack cable. The hubs support a power-off bypass feature which allows traffic to pass freely across the stack’s backplane, even if one or more of the hubs are powered off. Figure 2-2 shows how the stack cables are cascaded between the hubs in a stack (rack). To connect up to six hubs to the backplane, plug one end of the stack cable in the "Out" port of the top hub and the other end to the "In" port of the next hub.
Installing an Optional Module into the Hub Optional modules are available for media extension and internal switching between repeater buses and management. These modules can be installed into the modular slots on the left side of the hub. The Agent Module must be installed in the lower slot, and all other modules in the upper slot. DO NOT install slide-in modules with the hub powered on. Be sure you power off the hub before installing any module.
Using a Switch/Media Module The 10 and 100 Mbps repeater buses in the hub can be linked together by installing an optional switch/media module in the upper slot on the front panel. The switch/media module is used when traffic must be passed to a destination in the other segment, when broadcast traffic is sent, or when the destination is unknown. The switch/media module passes traffic between the source and destination segment at full duplex, using store-and-forward processing.
Connecting a Terminal to the Console Port The console port is a serial RS-232 interface port that enables a connection to a terminal for performing hub monitoring and configuration functions. The terminal may be a PC or workstation running terminal emulation software, or a terminal configured as a Data Terminal Equipment (DTE) connection. Alternatively, this port can be connected to an external modem to enable remote dial-in management.
2. Connect one end of the interface cable directly to the Agent Module’s console port and tighten the retaining screws. 3. Connect the other end of the interface cable to a terminal (in some instances, an adapter may be required to make this connection). 4. From your terminal, start the terminal emulation program. 5. Configure the terminal to the following communication settings: VT100 emulation, 9600 baud, no parity, 8 data bits, 1 stop bit, no flow control, ASCII character set.
You can also make a remote network connection (via modems) to the serial port on the Agent Module using SLIP protocol over TCP/IP. Using this kind of connection, the system functions similar to a router, allowing you to manage the hub or other attached devices using Telnet, a web browser, or network management software. Prior to accessing the hub via a SLIP connection, first configure it with a valid SLIP IP address, subnet mask, and default gateway.
Powering the Hub To supply power to the hub, connect the power cord to the hub and to a grounded three-prong wall outlet (Figure 2-5). See Appendix A "Technical Specifications" on page 91 for more information regarding specific international power cord requirements. Figure 2-5. Connecting the Power Cord The PWR LED lights green (see Figure 1-1). If it does not, check to make sure that the power cable is plugged in correctly and that the power source is good.
Network Cable Requirements Copper Table 2-3 specifies the cable types and length constraints for the various copper interfaces on the ELH100-12/24TX. Table 2-3. Copper Cable Specifications Interface Type Cable Requirement Maximum Length 10Base-T Category 3 or 5 Unshielded Twisted Pair (UTP) 100m (328 ft.) 100Base-TX Category 5 UTP 100m (328 ft.
10Base-T/100Base-TX Ports The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-6 shows an RJ-45 connector being inserted into a port. Figure 2-6. Inserting an RJ-45 Connector into a Port The ports on the base unit are wired with the MDI-X function implemented. These ports interface to UTP cabling for connection to 10Base-T or 100Base-TX network segments or end-stations. These UTP connections meet the requirements of ISO 8877, specified by 10Base-T, Section 14 of the IEEE 802.3 specification.
100Base-FX Fiber Ports The 100Base-FX Fiber port uses SC connectors. Figure 2-7 shows an SC fiber connector being inserted into a fiber port on the ELH100-12/24TX. Figure 2-7. Inserting an SC Fiber Connector into a Fiber Port The fiber uplink modules employed (Table 2-6) support multi-mode 62.5/ 125mm fiber. The 100Base-FX ports use SC fiber connectors. The fiber connectors are configured as a receive (RX) / transmit (TX) pair. Table 2-6.
3. ELH100-12/24TX USER INTERFACE Overview Access is gained to the console menus by connecting a terminal to the console port (with a direct cable connection or over modems), or using Telnet to access the Agent Module over the network. These menus allow you to reconfigure the hub, as well as to monitor the status and performance of the hub or the attached stack. The menus have a layout similar to the sample Main Menu shown in Figure 3-1.
User Access Once a direct connection to the serial port or a Telnet connection is established, the login screen for the on-board configuration program appears. You may need to press Enter a few times to display the screen. The default user names are “admin” and “guest,” with corresponding default passwords “admin” and “guest.” The administrator has Read/Write access, which allows you to read and modify hub information.
Menu Hierarchy Figure 3-2 shows the ELH100-12/24TX user interface menu hierarchy. Figure 3-2.
Main Menu The Main Menu is the first screen seen after successfully logging in to the system. Figure 3-3 shows the Main Menu and the accompanying table describes the Main Menu. Figure 3-3. Main Menu Main Menu ========= System Information ... Restart Hub ... Exit ... Configuration Screens ===================== System Configuration ... SNMP Configuration ... Hub Configuration ... Port Configuration ... TFTP Download ... XMODEM Download ... User Password ... Console Configuration ...
XMODEM Download Downloads new firmware to update the Agent Module via a console interface. User Password Sets Administrator and Guest names and passwords used for system access. Console Configuration Sets console time-out and refresh period for displayed statistics. Hub Statistics Displays network performance for each hub in the stack. Port Statistics Displays network performance for the selected port.
Reset Use the Restart Hub command under the Main Menu to reset the management agent. The reset screen includes an option to return all configuration parameters to their factory defaults. The hub takes approximately two minutes to restart. There is no apparent activity during this time. You should wait until the restart has completed. Exit Use the Exit command under the Main Menu to log out of the user interface and terminate communications with the hub for the current session.
System Configuration Menu Use the System Configuration menu to configure the Agent Module’s Internet Protocol (IP) parameters, define the maximum number of Telnet sessions allowed, and specify to which segment (10 Mbps or 100 Mbps) the management agent is attached. Figure 3-5 shows and the accompanying table describes the System Configuration Menu. Figure 3-5.
SLIP IP IP address of the Agent Module used when accessing the configuration program via an out-of-band SLIP connection to the serial port. The hub does not allow the SLIP IP address to be the same as the IP address. SLIP Subnet Mask Subnet mask for the SLIP IP address used by the Agent Module. SLIP Gateway SLIP gateway IP address used to pass traffic to the network management station. Note that the gateway must be defined if the management station is located in a different IP segment.
SNMP Configuration Menu Use the SNMP Configuration Menu to display and modify parameters for the Simple Network Management Protocol (SNMP). The Agent Module monitors the hardware status of the hub (or connected stack), as well as the traffic passing through the ports. A Network Management Station (NMS) can access this information using third-party network management software. Access rights to the management agent are controlled by community strings.
SNMP Communities Figure 3-7. SNMP Communities SNMP Communities ================ Community Name -----------1. public 2. 3. 4. 5.
SNMP Trap Destinations Figure 3-8. SNMP Trap Destinations SNMP Trap Destinations ====================== IP Address -------- Community Name ----------- Status ----- 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Hub Configuration Menus Use the Hub Configuration menu to configure any hub in the stack. This menu is used to configure the selected hub, as well as the Agent Module. Use the following menu to view a basic description of all the hubs in the stack, including hardware and firmware version numbers, or to open a more detailed configuration screen for a specific hub. The information provided by these screens is described in Figure 3-9 and Figure 3-10, and the accompanying tables. Figure 3-9.
Figure 3-10. Hub Configuration Menu Hub Configuration ================= Hub ID: 1 Model: ELH100-12TX Hardware ID: 11-00-00-00-1C-C8 Number of Ports: 12 10M backplane: Isolated 100M backplane: Isolated SNMP Agent ========== H/W Ver: 0 MAC Address: 00-00-1D-3F-2A-E1 Status: Active POST Ver: 1.00 System Ver: 1.
Serial Initialization String Yes, to send the initialization string to an attached modem. No, if there is a direct connection from the serial port to a PC. Switch Module Status Indicates if a switch/media module is installed.
Port Configuration Menu Select Administrative Status Control from the Port Configuration screen, then select the port group to configure, either “1 thru 12,” “13 thru 24,” or “Switch/Media Module” (if installed). The following screens show the configuration options. Port Administrative Status Control Menu Figure 3-11.
Module Port Configuration Menu The switch/media module configuration menu is accessible only if a module is installed in the hub’s upper slot. The switch/media modules have two internal ports that are connected to the hub’s internal repeater segments. The configuration screen and options are displayed below. Figure 3-12.
Backup Port Control Menu Select Backup Port Control from the Port Configuration screen to define up to 15 master/slave port pairs. If the connection to the master port fails, the slave port will automatically take over. For greater reliability, primary and secondary ports should be located on different hubs. The following screen and table show how to specify and activate port backup pairs. Figure 3-13.
TFTP Download Menu Use the TFTP Download menu to load software updates into the hub over the network. The download file should be an ELH100-12/24TX binary file from Cabletron; otherwise, the agent module will not accept it. The success of the download operation depends on the accessibility of the TFTP server and the quality of the network connection. After downloading new software, the agent module will automatically restart itself.
XMODEM Download Menu Use the Xmodem Download command to update available software in the hub via an out-of-band connection to the serial port on the Agent Module. The download file should be an ELH100-12/24TX binary file from Cabletron; otherwise, the agent module will not accept it. This command specifies direct download from an attached device via the serial port. You may download using any terminal emulation program that can transmit binary files using the XModem protocol.
User Password Menu The User Password menu is used to display or modify user names and passwords for the on-board configuration program. There are two user types, Administrator and Guest. Only the Administrator has write access for parameters governing the SNMP agent. You should therefore assign a user name and password to the Administrator as soon as possible, and store it in a safe place. Passwords can consist of up to 14 alphanumeric characters and are not case sensitive.
Console Configuration Menu The Console Configuration menu is used to configure the console connected to the hub’s serial port. The console parameters are described in the following figure and table. Figure 3-17.
Hub Statistics Menu The Hub Statistics screens display statistics for the 10 and 100 Mbps stack segments. These values can be used to indicate the approximate loading for each segment. You can use the Hub Statistics Overview screen to display key statistics for all hubs in a stack or detailed statistics for each individual hub. The Hub Statistics screens are shown in Figure 3-18 and Figure 3-19, and described in the accompanying tables. Figure 3-18.
Figure 3-19.
Port Statistics Menu Use the Port Statistics screen to display key statistics for each port. Overall statistics on the traffic passing through each port are displayed. This information can be used to identify potential problems with the hub (such as a faulty port). Select the required port from the Port Statistics: Port Selection Menu. The Port Statistics Screen is shown in Figure 3-20 and described in the accompanying table. Figure 3-20.
Auto Partitions Number of times this port has been automatically partitioned due to jabber. Total Errors Total number of errors, including FCS, Alignment, Frames Too Long, Short Events, Late Events, Jabber, and Data Rate Mismatches detected on this device. LSA Changes Number of times the source address has changed. Last Source Addr. Last source address. Refresh Statistics Refreshes the displayed statistics.
4. CONFIGURING & MONITORING THE HUB Common Tasks The hub console menus allow you to modify default hub settings and configure the hub for network management. They also allow you to monitor hub performance and status. See Chapter 3, ELH100-12/24TX User Interface on page 27, for an overview of the menu hierarchy and a description of all menus. The following sections describe common tasks in setting up and operating the ELH100-12/24TX hub using the console menus.
To enter a password, do the following: 1. Select Password from the System Configuration Menu and press [Enter]. 2. Enter a password containing 1 to 14 alphanumeric characters. The password is not case sensitive. For verification, you are asked to enter your password again. If both entries agree, the new password is stored. If you forget your password, contact your Cabletron System Support Representative.
Connecting via Telnet You can connect to the ELH100-12/24TX hub from a remote location using the Telnet application. This application allows you to establish inband access to the console menus. To connect to the ELH100-12/24TX hub via Telnet, do the following: 1. Assign an IP address using the System Configuration Menu. 2. Log in to the ELH100-12/24TX hub via Telnet using the configured IP address.
Viewing Hub Statistics To view hub statistics, do the following: 1. Select Hub Statistics from the Main Menu. The screen lists the main statistical counts for both segments on the hub simultaneously. 2. Select from the Hub Statistics Overview screen. The screen lists a summary of sum total statistics for all ports on the hub. 3. Select Port Statistics from the Main Menu. 4. Enter the Hub ID and Port ID. Select . The screen lists expanded port-level statistics for an individual port. 5.
4. When the system prompts, confirm that you want to proceed. The following message prompt displays: Receiving image... 5. Send the file using the XMODEM protocol from your computer application (the procedure varies depending upon the application used). When the XMODEM procedure finishes, a message appears stating that the system is initializing. The login prompt displays after the system initializes. If the login prompt does not display, you may need to press the Enter key several times.
Configuring Port Operation You can configure 10/100 ports on the base unit for operational parameters such as enabled/disabled, and port speed or auto-sensing. To configure port operation, do the following: 1. Select Port Configuration from the Main Menu. 2. Select Administrative Status Control from the Port Configuration menu. 3. Select Port Group 1-12, 13-24 or Switch/Media Module. 4.
Configuring BootP The BootP protocol allows you to automatically configure the hub’s IP address information. Enabling this feature greatly speeds up device configuration, especially when a large number of devices are installed. A BootP server must be operating on the network and be properly configured for this option to work. When this option is enabled, the hub tries to obtain an IP address from a BootP server. To configure BootP, do the following: 9033060 1.
5. WEB-BASED MANAGEMENT As well as the menu-driven system configuration program, the Agent Module provides an embedded HTTP Web agent. This agent can be accessed by any computer on the network using a standard Web browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or above). Using the Web browser management interface you can configure a hub (or stack attached via the backplane) and view statistics to monitor network activity.
Main Menu Menu Description System Information Provides system description, including system name and other data. Stack Browser Provides a graphical representation of the stack, access to SNMP agent, hub and port parameters. MIB Browser Access to MIB II, Repeater MIB, Ethernet-Like MIB and Cabletron’s private MIB parameters. RMON Browser Access to Statistics, History, Alarm and Event groups. Help Help on using the Web management interface.
System Information Field Description System Description System hardware description. System Object ID Object identifier for the hub’s network management subsystem as defined in MIB II. Sys. Up Time Time since the hub was last powered on. System Name* Name assigned to the hub system. Contact* Contact person for the system. Location* Specifies the area or location where the system resides. System Services Specifies services for the 7-layer network protocol.
Stack Browser Item Description Stack Displays the front panel graphic representation of all the hubs in a stack. Agent Access to configuration of IP address and SLIP IP address for the SNMP agent. Hub Displays hub configuration data and enables hub to be isolated from the stack backplane. Port Enables configuration of port parameters, sets port security and port backup features. Switch Module Access to the Switch/Media Module configuration and statistics.
Front Panel Select “Stack” then “Front Panel” to display a graphic image of the hub or attached stack. Item Description [Refresh] Immediately refreshes front panel status. Refresh Mode Select The scroll-down window includes options for: “autoRefresh” of the front panel every 10 seconds, or “manual” refresh by pressing the [Refresh] button.
Agent Configuration Select “Agent” then “Agent Configuration” to display IP configuration and other information. Item Description IP Address IP address of the Agent Module you are managing. Valid IP addresses consist of four numbers, of 0 to 255, and separated by periods. (The default address is 0.0.0.0.) Subnet Mask Subnet mask of the Agent Module you are managing. This mask identifies the host address bits used for routing to specific subnets. (The default subnet mask is 0.0.0.0.
Hub Configuration Select “Hub” then “Hub Configuration” to display hardware and firmware configuration of the hub. Item Description Hub ID Hub identifier in stack. Model The model number of this hub. Hardware Version Version number of the hub hardware. Repeater Serial No. Serial number of this hub. System Version System firmware version. POST Version Version number of the Agent Module’s Power-on Self-test. Agent Status Indicates if an Agent Module is installed and active.
Hub Backplane Select “Hub” then “Hub Backplane” to display information about the hub’s connection to the stack’s backplane. Item Description Hub ID Hub identifier in the stack. Backplane ID The hub’s segment, 100 Mbps (1) or 10 Mbps (2). Select a segment to display/configure in the Backplane Status field. Backplane Status Select to isolate or attach the hub’s repeater bus to the stack backplane then press [Apply].
Port Configuration Select “Port” then “Port Configuration” to display information about the port’s connection, or to display/configure the port’s security setting. Item Description Hub ID Hub identifier in the stack. Port ID Port number to configure. Current Speed Indicates the transmission speed currently used by this port. Set Speed Selects the port speed, 100 Mbps, 10 Mbps or Auto-Detected. Admin State Allows you to disable a port due to abnormal behavior (e.g.
Port Backup Select “Port” then “Port Backup” to display/configure redundant links. Item Description Index Identifier for up to 15 backup port pairs. Primary Hub Hub ID for the master port. Primary Port Port identifier for the master port. Secondary Hub Hub ID for the slave port. Secondary Port Port identifier for the slave port. Action Each backup pair can be set to Active or Inactive. Status Active is displayed if the backup port has taken over the link.
Switch Module Statistics Select “Switch Module” then “Switch Module Statistics” to display statistics for the switch/media module. Item Description Readable Frames Number of good frames received by the port. Readable Octets Number of good octets received by the port. FCS Errors Number of FCS errors. Alignment Errors For 10 Mbps ports, the counter records alignment errors (missynchronized data packets).
MIB Browser The MIB Browser menu allows access to various MIB group data and statistics. This guide provides only a summary of the MIBs supported by the Agent Module. All MIB group objects are as defined by RFC 1213 (MIB II), RFC 2108 (Multi-Segment Repeater MIB), and RFC 1643 (Ethernet-Like MIB). For further information on specific MIB entries, refer to the on-line help provided by the Web Agent.
RMON Browser The RMON Browser enables access to the RMON data groups supported by the Agent Module. This guide only provides an outline of the menu items available. All Statistics, History, Alarm and Event group parameters are defined by RFC 1757 (RMON MIB). Note that the control table entries can only be set using SNMP-based network management software. Menu Description Statistics View the data for each control table entry in the Statistics group.
Ethernet Statistics The RMON Manager collects statistics that allow you to quickly determine how the network is performing. Select “Statistics” then “Statistics Entry” to display Ethernet statistics. Item Description Statistics Index Index for this item in the control table. Data Source MIB variable that is being monitored: 1.3.6.1.2.1.2.2.1.1.4 - 100 Mbps stack backplane 1.3.6.1.2.1.2.2.1.1.5 - 10 Mbps stack backplane 1.3.6.1.2.1.2.2.1.1.6 - Stack Unit 1 100 Mbps segment 1.3.6.1.2.1.2.2.1.1.
Jabbers Total number of jabber errors. Collisions Total number of packet collisions. Packets 64 Octets Number of packets less than 64 octets. Packets 64 to 127 Octets Number of packets between 64 and 127 octets. Packets 128 to 255 Octets Number of packets between 128 and 255 octets. Packets 256 to 511 Octets Number of packets between 256 and 511 octets. Packets 512 to 1023 Octets Number of packets between 512 and 1023 octets.
Packets Pie Chart Select “Statistics” then “Packets Pie Chart” to display the graphic representation of packet size distribution. Item Description Packets 64 Octets Number of packets less than 64 octets. 64 to 127 Octets Number of packets between 64 and 127 octets. 128 to 255 Octets Number of packets between 128 and 255 octets. 256 to 511 Octets Number of packets between 256 and 511 octets. 512 to 1023 Octets Number of packets between 512 and 1023 octets.
Error Packets Ratio Select “Statistics” then “Error Packets Ratio” to display the graphic representation of the distribution of error types. Item Description Broadcast Packets Percentage of broadcast packet errors. Multicast Packets Percentage of multicast packets errors. CRC Align Errors Percentage of CRC and alignment errors. Undersize Packets Percentage of undersize packets. Oversize Packets Percentage of oversize packets. Fragments Percentage of fragments. Jabbers Percentage of jabbers.
History Control Entry RMON can be used to create a record of network utilization, packet types, errors and collisions. You need a historical record of activity to track down intermittent problems. Historical data can also be used to establish normal baseline activity, which may reveal problems associated with high traffic levels, broadcast storms, or other unusual events. Historical information can also be used to predict network growth and plan for expansion before your network becomes too overloaded.
History Data Entry Select “History” then “History Data Entry” to display the data recorded for items in the history control table. Item Description History Index An index that uniquely identifies an entry in the History Control table. Each such entry defines a set of samples at a particular interval for an interface on the device.
CRC Alignment Errors Number of packets received during this sampling interval that had a length (excluding framing bits but including FCS octets) between 64 and 1518 octets, inclusive, but had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error).
Rate Bar Chart Select “History” then “Rate Bar Chart” to display the recorded rate of packets, broadcasts, multicasts and collisions collected for the selected segment. The scale for the graphic display is automatically adjusted to present the best view possible. (However, the smallest increment on the vertical axis is limited to 0.05.).
Utilization Select “History” then “Utilization” to display the percentage of bandwidth utilized over the sample period. Item Description Utilization Displays the bandwidth utilization for the selected segment.
Alarm The Alarm and Event Groups allow you to record important events or immediately respond to critical network problems. The Alarm and Event Control Tables are used together to define specific criteria that will generate response events. Remember that the Web Agent can only display control entries. To define a specific entry, you must use third-party network management software. Select “Alarm” then “Alarm Entry” to display the items listed in the control table for monitoring.
Falling Threshold When the current sampled value is less than or equal to this threshold, and the value at the last sampling interval was greater than this threshold, a single event will be generated. A single event will also be generated if the first sample after this entry becomes valid is less than or equal to this threshold and the associated alarmStartupAlarm is equal to fallingAlarm(2) or risingOrFallingAlarm(3).
Event Table Select “Event” then “Event Table” to display the action to take when an alarm is triggered. The response to an alarm can include logging the alarm in a database or sending a message to a trap manager. Item Description Event Index An index that uniquely identifies an entry in the event table. Each such entry defines one event that is to be generated when the appropriate conditions occur. Description A comment describing this event entry.
Log Table Select “Event” then “Log Table” to display each time an event was triggered. Note that there are no display windows associated with the Alarm and Event groups other than the control and log tables. Item Description Event Index Event entry that generated this log entry. Refresh Time Interval Interval at which data displayed to the screen is refreshed. Log Index An index that uniquely identifies an entry in the log table amongst those generated by the same eventEntries.
6. SNMP MANAGEMENT The SNMP Protocol SNMP (Simple Network Management Protocol) is a communication protocol designed specifically for the purpose of managing devices or other elements on a network. Network equipment commonly managed with SNMP includes hubs, switches, routers, and host computers. SNMP is typically used to configure these types of devices for proper operation in their network environment, as well as to monitor them to evaluate their performance and detect potential problems.
There are three main operations defined in SNMP: • GET operations read information from the managed device, such as those used to obtain status or statistical data. • SET operations change a functional parameter on the device, such as those used to configure Port Speed or to initiate a software download. GET and SET operations are initiated only by the manager software, and result in a response by the agent. • TRAP operations allow the agent to send an unsolicited message to the manager.
This MIB reports information about the protocols and network interfaces supported on the agent itself, as well as other general information. The MIB is divided into a number of groups, each of which corresponds to a specific protocol or set of information. Some groups are defined in other RFC documents.
Compiling MIB Extensions: Cabletron Website The MIBs supported by the ELH100-12/24TX hub must be compiled into the SNMP network management platform before the hub can be managed. The supported MIBs are available using Cabletron’s website at: http://www.cabletron.com The four standard MIB specifications listed above with which the ELH100-12/24TX hub is compliant are generally available with the SNMP management platform.
APPENDIX A. TECHNICAL SPECIFICATIONS General Standards Compliance 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 802.3u 100Base-FX (ISO/IEC 8802-3, clause 26) EIA RS-232C (DTE-to-DCE) EIA RS-310C (19-inch rackmount) Certification Emissions: FCC Part 15, Subpart B, Class A; EN55022 (CISPR 22), Class A; VCCI Class A Safety: CSA/NRTL (C22.2.
Electrical Specifications Input voltage: 100-240 VAC Input frequency: 50-60 Hz Maximum power consumption: 50 VA Physical Height: 2.5 in. (6.3 cm) Length: 7.9 in. (20 cm) Width: 17.3 in. (44 cm mountable in a standard 19 in. rack) Weight: 9.92 lb. (4.
Port Specifications Console Port Table A-1 shows the console port pin assignments. Table A-1. RS-232 Console Port Pin Assignments Pin Signal Name 1 DCD 2 RXD 3 TXD 4 DTR 5 Ground 6 DSR 7 RTS 8 CTS 9 RI 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.
MDI/MDI-X Crossover Cable Wiring Figure A-1 shows the wiring scheme for implementing a crossover cable if needed for connection to the hub’s 10Base-T or 100Base-TX ports. Such a cable may be required when connecting the hub to another hub or a switch device. Figure A-1. External Crossover Cable Wiring Power Cord Set Requirements The wide-range input feature of the ELH100-12/24TX Ethernet hub permits it to operate from any line voltage between 100 and 240 VAC.
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.
Note 2 Flexible cord must be Type SV, SJ, SPT or equivalent, No. 18 AWG, 3conductor. Wall plug must be a two-pole grounding type with a NEMA 515P (15A, 125V) or NEMA 6-15P (15A 250V) configuration. Note 3 Appliance coupler, flexible cord, and wall plug must bear a “T” mark and registration number in accordance with the Japanese Dentori Law. Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm2 conductor size.
APPENDIX B.
INDEX 100Base-FX fiber ports, 25 module defined, 5 100M LED, defined, 6 10Base-T/100Base-TX module defined, 5 pinouts, 93 ports, 24 802.2, 91 802.3, 24, 91 802.3i, 91 802.
I in-band configuration, 8 connection, 20 inspecting your shipment, 13 installing an optional module, 17 IP address, assigning, 54 L LED indicators, 3, 4, 6 Link LED, defined, 6 logout, 32 M Main Menu, 27, 30 Web interface, 62 MDI, 24 MDI/MDI-X Crossover Cable Wiring, 94 MDI-X, 24 menu hierarchy, 29 MIB, 87, 88 compiling extensions, 90 Ethernet-like, 89 Multi-segment, 89 Proprietary, 89 RMON, 89 MIB Browser Web interface, 72 MIB-II, 88 modem connection, configuring, 20 Module Port Configuration Menu, 42 m
S screen timeout, 54 segment LEDs, 4 defined, 4 Serial port, 8 site requirements, 13 SNMP, 8, 36, 55, 87, 88, 90 Communities, 36 Configuration Menu, 35 setting access, 55 Trap Destinations, 37 SNMP-based network manager, 8 Spanning Tree, 58 stack cable, 16 Stack Connectors, defined, 7 Standards Compliance, IEEE, 91 switch LED, 4 defined, 4 Switch Module Statistics Web interface, 71 Switch/Media Module how to use, 18 System Configuration Menu, 33 System Information Menu, 31 Web interface, 63 Telnet, 8, 27 c
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