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Compaq Netelligent 2724 User Manual

Dual-speed hubs
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Netelligent 2724/2824
Dual-Speed Hubs
User Guide
©1997 Compaq Computer Corporation. All rights reserved.
Compaq Registered U.S. Patent and Trademark Office.
Company and product names mentioned herein may be
trademarks and/or registered copyright and trademarks of
their respective companies.

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  • Page 1 Netelligent 2724/2824 Dual-Speed Hubs User Guide ©1997 Compaq Computer Corporation. All rights reserved. Compaq Registered U.S. Patent and Trademark Office. Company and product names mentioned herein may be trademarks and/or registered copyright and trademarks of their respective companies.
  • Page 2 1997 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Compaq Registered United States Patent and Trademark Office. Netelligent is a trademark of Compaq Computer Corporation. Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide First Edition (June 1997) Part Number 299440-001...
  • Page 3 ......Part 15 of the Federal Communications Commission (FCC) Rules and Regulations has established Radio Frequency (RF) emission limits to provide an interference-free radio frequency spectrum.

  • Page 4: Canadian Notice

    This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Avis Canadien Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. European Union (EU) Notice Products with the CE Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage Directive (73/23/EEC) issued by the Commission of the European Community.
  • Page 5 Compaq fiber ports have been tested in accordance with the IEC 825-1 test standard and found to meet the Class 1, intrinsically eye-safe emitter classification. CLASS 1 LED KLASSE 1 LED The fiber ports on this product have been tested in accordance with the IEC 825-1 Test Standard and found to meet the Class 1, intrinsically eye-safe emitter classification.
  • Page 6 ......LEEE The non-volatile RAM (NVRAM) chip on the motherboard of the Netelligent 2824 hub contains a non- replaceable lithium battery. Only trained service personnel should dispose of this chip.

  • Page 7: Table Of Contents

    Features... 1-2 Package Contents... 1-4 Hub Components ... 1-5 RJ-45 Ports ... 1-5 Smart Uplink Slot ... 1-5 LED Indicators ... 1-6 Serial COM Port ... 1-8 Host/Target DIP Switch ... 1-9 Managed/Unmanaged DIP Switch ... 1-10 Internal 10/100 Switch Disable DIP Switch... 1-10 10 ONLY - 10/100 Switch ...
  • Page 8 Mounting the Hub... 3-1 Attaching the Rubber Feet... 3-1 Rack-Mounting the Hub ... 3-1 Installing a Smart Uplink Module ... 3-3 Inserting the Smart Uplink Module into the Smart Uplink Slot... 3-3 Connecting Cable... 3-5 Interconnecting Hubs... 3-6 Connecting Power... 3-10 Disconnecting Power...
  • Page 9 Compaq Specific Parameters ... 5-20 Physical... A-1 Electrical ... A-1 Environmental... A-1 Connecting the Hub for VT100 ... B-1 Setting Up the Communications Program ... B-1 Starting the VT100 Interface ... B-2 Basic Update Fields ... B-4 VT100 Management Options... B-5 Displaying a Data Screen...
  • Page 10 Changing the Password... B-17 Downloading Firmware ... B-19 Setting Up the Serial Port ... B-21 Configuring User Access ... B-23 Configuring IP User Access ... B-24 Configuring IPX User Access ... B-28 Logging Out of the Management Session... B-30...
  • Page 11 Chapter 1 Overview The Netelligent 2724 and 2824 Dual-Speed hubs feature a 10Base-T and a 100Base-TX repeater in each unit connected by an internal two-port 10/100 Mb/s switch. Each of the hubs’ 24 RJ-45 ports automatically detects and adjusts to 10 Mb/s or 100 Mb/s port connection speeds. This makes the hub a perfect solution for networks migrating from 10 Mb/s to 100 Mb/s, allowing you to move from 10 Mb/s to 100 Mb/s speeds on a port-by-port basis.

  • Page 12: Features

    Stackable lets you stack up to five hubs (four manageable 2724 hubs and one managing 2824 hub) for up to 125 workstation connections. You can also interconnect the 2724/2824 hubs with Netelligent 2524/2624 hubs. Host/Target Design allows manageable hubs (Model 2724) to be managed...
  • Page 13 2724/2824 hub to overcome the single repeater hop restriction for Class I 100Base-T repeaters. IP/IPX Autodiscovery allows the hub to be autodiscovered by network management platforms such as Novell ManageWise, HP OpenView, SunNet Manager, IBM NetView 6000. Fast Ethernet Wiring Standards UTP cabling.

  • Page 14: Package Contents

    Rack-mounting kit (two mounting brackets, eight 3/8-inch bracket screws, and four 1/2-inch rack-mount screws) Four adhesive-backed rubber feet Compaq Netelligent Management Software Compaq Netelligent 2724/2824 Dual-Speed Hub Quick Install Guide Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide CD Safety compliance guide Registration card Figure 1-1.

  • Page 15: Hub Components

    ......This section provides an overview of the hub's components including the LED indicators, RJ-45 ports, and fiber ports. Figure 1-2 shows the hub’s front panel. The hub’s RJ-45 ports allow connections to UTP cabling to workstations and servers in a 10Base-T or 100Base-TX network.
  • Page 16 The LED panel of the 2724/2824 hub helps you monitor the hub’s operation. When you power on a hub, it performs a power-on self test (POST) which lasts about 1 minute. After the POST, all LEDs reflect the current operational modes...
  • Page 17 ......

  • Page 18: Serial Com Port

    The 2824 (managing) hub contains a serial COM port that uses a DB9 connector with a standard AT pinout. This port lets you perform the following operations: XMODEM firmware downloads VT100 console interface for basic management and initially setting the...

  • Page 19: Host/Target Dip Switch

    On the back panel of the 2724 hub is a HOST/TARGET DIP switch that determines whether the hub is a host or target hub in a hub stack. For example, you can connect up to two 2724 hubs and designate one as the host and the other hub as a target for an unmanaged stack.
  • Page 20 ......On the back panel of the 2724 hub is a MAN/UNM DIP switch that sets the hub’s initial 100 Mb/s port enable/disable and backplane connection status.
  • Page 21 2824 hubs. This switch lets you set Port 1 as an MDI 10Base-T (uplink) port (for connecting to another hub) or as an MDI-X port (for connecting directly to a network controller card). The 10 MDI setting is for 10Base-T...

  • Page 22: Internal 10/100 Switch Disable Dip Switch

    ......A segment is a single collision domain where all network traffic within that domain contends for the same bandwidth. The Netelligent 2724/2824 hub has a 10 Mb/s segment and a 100 Mb/s segment that are connected via an internal two-port (10 Mb/s / 100 Mb/s) switch.

  • Page 23: Installation Requirements

    To help ensure a correct installation, read this section to determine the environmental, electrical, spatial, and cable requirements. Environmental Requirements Be sure the operating environment for the hub is within the following ranges: Temperature: 32 to 104 F (0 to 40 C) Humidity: 5% to 95% (non-condensing) Altitude: 0 to 10,000 feet (0 to 3 km) Clearance: minimum of 2 inches (5.1 centimeters) on each side of the...
  • Page 24 The hub dimensions are 2.5 x 17 x 13.5 inches, 6.4 x 43.6 x 34.6 cm (HxWxD). Be sure to allow at least 2 inches (5.1 centimeters) on each side of the hub for proper air circulation and cable connections.
  • Page 25 100Base-TX is the IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two pairs of copper wire. The pinout, connectors (RJ-45 modular plugs), and protocol (CSMA/CD) are exactly the same as for 10Base-T. Category 5 only Two pairs used (same as 10Base-T) Maximum 100-meter (328-foot) link Figure 2-1 shows a one-to-one cable pinout for 100Base-TX.
  • Page 26 100Base-FX is the IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two strands (one pair) of fiber optic cable. The 2724/2824 hub supports both SC type (low-cost fiber optic interface connector) and ST (optical medium connector plug and socket) connections.
  • Page 27 ......The charts in Figures 2-2 and 2-3 provide a convenient way of planning the connections for your hub.
  • Page 28 ......
  • Page 29 Turn the hub to its upright position and place it on the mounting surface. The hub occupies 1 ½ slots in a standard 19-inch rack. To mount the hub in a rack, use the supplied installation kit. This kit includes two side mounting...
  • Page 30 To attach the brackets, follow these steps: Remove the two screws from the left and right side of the hub. (These screws are extras and are not needed to install the mounting brackets.) Position the bracket as shown in Figure 3-1 and secure it with the smaller bracket screws.
  • Page 31 (Part No. 267042-001) 100Base-FX (fiber) version SC connector (Part No. 267043-001) To insert a Smart Uplink Module into a Netelligent 2724 or 2824 Smart Uplink slot, follow these steps: Power down the hub by disconnecting the power cord from the power...
  • Page 32 SUM with the card guides inside the hub (Figure 3-4). 4. Carefully push the Smart Uplink module's 50-pin male connector into the SUM socket on the hub motherboard until the SUM is firmly seated and its faceplate is flush with the hub's front panel.
  • Page 33 2 Km in length at full-duplex operation. To attach the cable, plug one of the cable connectors into the selected port on the hub. Connect the other end of the cable to the corresponding port on a 10Base-T, 100Base-TX, or 100Base-FX workstation (if you installed a...
  • Page 34 2824 hub for a fully managed stack. You can also interconnect the 2724 and 2824 hubs with Netelligent 2524 (manageable) and 2624 (managing) hubs. You can place the 2824 hub in any position (top, middle, bottom) in a two- to five-hub stack. The 2824 hub has an expansion interface that consists of four 68-pin backplane connection cables (EXPN PORT A, B, C, and D) on the hub's back panel.
  • Page 35 TARGET (Factory default setting) Lets you connect one, two, three, or four 2724 hubs to a 2824 managing hub to form a “managed” dual- speed hub. HOST Lets you connect two 2724 hubs in an unmanaged stack to form a single 48-port dual-speed hub (with no 2824 hub in the stack).
  • Page 36 Figure 3-6 shows two expansion ports of a 2824 hub connected to the expansion ports of two 2724 hubs using backplane connection cables. In this example, the 2824 hub (top hub in the stack) manages two 2724 hubs. The DIP switches on both 2724 hubs are set to “TARGET,” as required in a...
  • Page 37 ......Figure 3-7 shows two 2724 hubs connected via a backplane connector between the EXPN PORTs. The DIP switches on the 2724 hubs are set with the top hub as the HOST and the bottom hub as the TARGET.
  • Page 38 The power source should be near the hub and easily accessible. When you plug in the power cord, the hub performs a self test in which the RJ-45 LEDs are green (or yellow if collisions are occurring), off, yellow, and off again.
  • Page 39 VT100 interface. To use this interface, you must connect a workstation to the hub’s serial port using a null modem (to set the IP address locally) or to a regular modem (to set the IP address remotely). The serial cable has a DB-9 connector at each end.
  • Page 40 ......
  • Page 41 ......
  • Page 42 To allow management of the 2824 hub, you must first set its IP address. After you set the IP address, you can set additional configuration parameters using the VT100 interface discussed in Appendix A “Using the VT100 Interface.” Or, you can manage the hub using Compaq Netelligent Management Software, which is included on CD with the hub.
  • Page 43 Type a name for the connection (for example, “IP Setup”) and click on OK. 4. Select the Direct to Com 1 option (in this example) in the Connect using field of the Phone Number dialog box. Click on OK.
  • Page 44 ......5. Enter the following port settings in the dialog box and click on OK. Bits per second: 9600 Data bits: 8 Parity: None...
  • Page 45 ......Enter the following command: The Login screen appears.
  • Page 46 ......Within 20 seconds after the Login screen appears, type and enter the word “public,”...
  • Page 47 8. Highlight Option B, Management Agent Configuration, using the down arrow key or <Tab> key. Then press <Enter>. The Management Agent Configuration screen appears. 9. Use the arrow or tab keys to move to the IP Address field. Then enter the IP address for the Ethernet interface.
  • Page 48 The 2824 hub has two boot phases: Boot and Runtime. In the Boot phase (STATUS LED is orange), the hub issues as many requests as are defined in the cpqnBootpRetries MIB object The default number of requests is two. The hub issues the requests using two different frame types (Ethernet_II and 802.2...

  • Page 49: Management Features

    Four-group Remote Monitoring (RMON) Firmware upgrade capabilities After you set the IP address for the 2824 hub (described in Chapter 4, “Configuring the Hub for Management”), you can use BOOTP, VT100, SNMP, or Compaq Netelligent Management Software to configure the network parameters and manage the hub.
  • Page 50 ......

  • Page 51: Snmp Management

    CPQNUNIF Compaq Netelligent Unified MIB The hub supports four different Ethernet frame types. It is important to know that the 2824 hub supports the frame types used in your network. For convenience, each frame type is referred to by its Novell name. The following table lists each frame type, its Novell name, and whether or not it is supported for IP and IPX.
  • Page 52 IP management flexibility, the 2824 hub supports both ETHERNET_II and ETHERNET_SNAP frame types. Although the hub supports two different Ethernet frame types, it cannot support both simultaneously. This is because an individual IP network can only use one frame type and different frame types require different IP networks even if they...

  • Page 53: Ip Frame Types

    BOOTP Sends requests over ETHERNET_II and/or ETHERNET_SNAP frame types, which you can configure, as needed. The hub’s IP frame type is set to the frame type of the BOOTP response (if it is received) and saved in non-volatile memory. SNMP If you set the frame type using SNMP over IP, you must set the IP address using the cpqnIpAddr MIB variable.

  • Page 54: Ip Protocols

    The hub supports the following IP protocols: The hub supports a generic IP autodiscovery method used by many of the leading SNMP management platforms (such as HP OpenView, SunNet Manager, IBM NetView 6000). This method lets the management platforms automatically discover managing 2824 hub in the network.
  • Page 55 The 2824 hub implements IP autodiscovery via two MIB objects, each of which is stored in non-volatile memory. In addition to IP, the 2824 hub also supports an IPX protocol stack. To provide seamless network management, all Ethernet frames types supported by Novell must be supported by hubs.

  • Page 56: Ipx Frame Type

    Most IPX communications uses IPX packets that are initiated by a requestor, not the hub. A management station sends these packets to the hub and waits for a response. The hub receives the packet and sends it back using the same frame type and IPX network number used to send the packet.

  • Page 57: Ipx Protocols

    ......The hub supports the following IPX protocols:...
  • Page 58 The protocols involved in IPX autodiscovery support are SAP, RIP, and IPX Diagnostics. Using SAP, the hub advertises that it is an HMI server (although not all of the server functions are implemented). This registers the hub in the Binderies of all the NetWare servers on the network segment.

  • Page 59: Traps

    Each IP and IPX trap tables can contain a maximum of ten entries. The table below summarizes the traps generated by the hub. The headings are defined as follows: MIB is the MIB or RFC that defines the traps. Trap lists the traps by a convenient name.
  • Page 60 ......The following table describes when the 2824 hub issues each trap. The Health, Group Change, and Reset traps are listed only once since they are issued under the same circumstances.

  • Page 61: Statistics Group

    Remote monitoring (RMON) lets a management system remotely monitor and report network activity. Of the nine groups defined by RMON in RFC1757, the 2824 hub implements four, including Statistics, History, Alarm, and Event. RMON is designed to supplement the management information from SNMP. In...

  • Page 62: History Group

    Thus it is possible for the first sample in an etherHistoryTable entry to start with a number other than 1. The 2824 hub saves the parameters in the historyControlTable in NVRAM and restores these parameters each time the hub is re-initialized. However, the 2824...

  • Page 63: Alarm Group

    MIB object to monitor, how often to monitor it, and the thresholds of the MIB object’s value that cause an event to be generated. The 2824 hub stores alarmTable entries in NVRAM and restores these each time the hub is re-initialized. When an alarmTable entry is created, the alarmRisingThreshold and alarmFallingThreshold objects are set to 0.

  • Page 64: Event Group

    SNMP trap and/or an entry in an event log. In the 2824 hub, the only triggers of events are alarms defined in the Alarm Table. In other words, an alarm can trigger an event, which can then issue a notification.
  • Page 65 ......You can update the firmware for the 2824 hub with several file transfer methods: Different file transfer methods take different amounts of time to execute.
  • Page 66 TFTP time-outs and bad Flash checksum. The 2824 hub resets and all the LEDs flash to indicate a problem has occurred. If the error did not occur during the erase/program of Boot, you can repeat the download using either the VT100 interface or BOOTP/TFTP (TFTP downloads cannot be initiated using MIB variables since SNMP is not available in Boot.
  • Page 67 The 2824 hub stores important configuration parameters in non-volatile memory to allow its configuration to be saved if a power outage occurs. When the hub is powered up, it restores the saved settings. System name, location, and contact Novell Hub MIB repeater and port names RMON configuration (doesn’t include history buckets or event log)
  • Page 68 (MAC) addresses, each of which consists of six bytes. The first three bytes are fixed and stand for “Compaq Computer Corporation.” The last three bytes must be unique for each interface on the hub. The following is an example of a MAC address: where is a byte.
  • Page 69 ......sysDescr — The system description string contains the following line: SAP ID — This is a Compaq SAP ID registered with Novell. Its hexadecimal value is b105.

  • Page 70: Physical

    The following specifications list the physical, electrical, and environmental characteristics of the 2724/2824 Dual-Speed Hub. Unit Weight: 8 lb (4.7 kg) Shipping Weight: 13.7 lb (6.2 kg) Unit Dimensions: 2.5 x 17 x 13.5 (HxWxD) Rubber Foot: 0.25 inches, 0.635 cm high...
  • Page 71 After you set the IP address for the hub, you can use the hub’s VT100 interface to view statistics, set specific configuration parameters, and download firmware. The interface’s quick access to menu option screens makes it an excellent way to manage the hub if you are unfamiliar with graphical user interfaces (GUIs) or your workstation does not have Compaq Netelligent Management Software installed.
  • Page 72 After you make the required connections and set up the communications program, follow these steps to start the VT100 interface. Start the communications program. If you use a Telnet application, enter a valid IP address and start the connection. Enter the following command: The Login screen appears.
  • Page 73 ......The main screen displays the Preboot, Boot, and Runtime firmware versions in the lower left corner of the screen.
  • Page 74 If the system has been up for more than a day, the field shows the time in days and hours. You cannot change this field unless you reset the hub.
  • Page 75 From the Main menu, you can display data screens that let you perform the following management operations: View and edit system information Configure the management agent View port statistics View and edit the stack configuration View and edit the backup port configuration Change the VT100 password Download firmware Set up the serial port...
  • Page 76 The VT100 data screens consist of editable and non-editable data fields. Most data screens also display the system up time, system name (first 25 characters), and hub IP address. (The IP address appears only if the hub is connected via a Telnet session.)
  • Page 77 ......Editable fields are highlighted in black. They include data entry fields, which require you to enter text, and toggle fields, which require you to select a setting from a preset list of options.
  • Page 78 The System Information screen shows basic information about the system in which the hub operates. The System Information screen displays the following information: Contact Name The name of the personal contact at the system installation (also the MIB-II sysContact text string)
  • Page 79 Reset Unit Select No Reset to prevent the hub from resetting after you accept changes. Select Reset to reset the hub after you accept changes. Select Restore Defaults and Reset the reset the hub and restore all factory default configuration parameters after you accept changes.
  • Page 80 The Management Agent Configuration screen displays information for the hub’s Ethernet interfaces and serial interface. The screen consists of the following update fields: Interface Type The currently selected interface type. Possible values are “Ethernet” and “Serial.” Physical (MAC) Address The physical address of the current interface. This field is blank for the serial interface.
  • Page 81 BOOTP broadcast configuration in system Runtime operation. For serial interfaces, this field shows “Disabled” and cannot be changed. IP Autodiscovery — Select Enabled to allow the hub to send out pings for AutoDiscovery. Select Disabled to prevent autodiscovery. IP Autodiscovery Interval — This field shows the length of time between pings for autodiscovery.
  • Page 82 The Port Statistics screen displays statistics for specific ports on the hub. In addition to port statistics, the Port Statistics screen displays the following information: Port Speed — Shows the current wire speed of the port which includes the following options: No Link —...
  • Page 83 The Stack Configuration screen displays configuration information for all hubs in a stack. If a hub is powered down or not present in the stack, dashes appear in that hub’s row. The screen displays information for three units if the managing hub is a 2624 and five units if the managing hub is a 2824.
  • Page 84 Unit Description — This field shows a brief description of the hub. Backplane Configuration — The backplane connection status for the hub. Select “Connected” or “Isolated” to connect the hub to or isolate it from the stack’s common 100Mb/s Ethernet backplane. For Netelligent 2524 and 2624 hubs, which do not have this feature, this field always shows “Connected.”...
  • Page 85 The Backup Port Configuration screen shows information about the slot number of the primary and backup port and the status of the ports. The screen also lets you add, delete, and enable or disable the state of backup port entries. To add a backup port entry, follow these steps: From the Action field, move the cursor to the Primary Unit entry field.
  • Page 86 Move the cursor to the Backup Unit entry field. Then enter the number of the desired backup unit. Move the cursor to the Backup Port entry field. Then enter the number of the desired backup port. Move the cursor to the State entry field and press the space bar to select Enable or Disable.
  • Page 87 Press the Enter key. The following error messages may appear if you enter information incorrectly in the Backup Port Configuration window: To correct the error, be sure you have correctly entered all the necessary information in the various fields, including valid port and backup port numbers. The Change Password screen lets you change your current password.
  • Page 88 ......The default password for VT100 sessions is “public.” If you forget the password, you can restore it to the default password by setting the cpqnUnitReset MIB object in the Netelligent Unified MIB to reset-to-factory-values(4).
  • Page 89 The Download Firmware screen lets you download an updated version of firmware. You can download Runtime only or a combination of Boot and Runtime. If you access VT100 using a direct link, you can download firmware via XMODEM or TFTP over Ethernet. If you access VT100 using Telnet, you can download firmware via TFTP over Ethernet or TFTP over SLIP.
  • Page 90 If you selected TFTP as the protocol type, enter the TFTP server IP address in the TFTP server IP address field and enter the firmware image filename in the Filename field. To execute the download, position the cursor on the Start download field and press <Enter>.
  • Page 91 ......The Serial Port Setup screen lets you set up the hub’s serial port configuration parameters.
  • Page 92 = 100mS. If you choose to enter a new modem command string, the string can be up to 40 characters in length. However, in order for the hub to work correctly, the following modem parameters must remain set to their default values: modem response on, verbose on, DCD asserted during carrier linkage, auto-answer on, and echo off.
  • Page 93 ......The user access screens let you configure user access for IP and IPX. This feature allows the management agent to limit SNMP and Telnet access to authorized stations.
  • Page 94 Each entry specifies an IP address range via an address mask, address match, write community string, and access description. The hub’s management agent lets you specify a range of authorized addresses or a list of individual nodes. The agent treats the requestor’s address, address mask, and the address match as a string of bits.
  • Page 95 ......Suppose a user wanted all nodes on a specific IP or IPX segment to have SNMP access.
  • Page 96 The Access field at the end of the edit line lets you select the following access options: No Access — The address/community name pair has neither SNMP/IP nor Telnet access. RO/No Telnet — Allows only read access to MIB objects and disallows Telnet access.
  • Page 97 Move the cursor to the edit line and modify the three edit fields as desired. Move the cursor to the Action field, toggle to the Update option (using the space bar), and press <Enter>. The new configuration immediately takes effect. If there are any configuration errors, an error message appears.

  • Page 98: Configuring Ip User Access

    Each entry specifies an IPX address range via an address mask, address match, write community string, and access description. The hub’s management agent lets you specify a range of authorized addresses or a list of individual nodes. The agent treats the requestor’s address, address mask, and the address match as a string of bits.
  • Page 99 Follow these steps to add an entry. Move the cursor to the Action field, toggle to the Add option (using the space bar), and press <Enter>. Enter the information for the new entry in the edit line. Move the cursor to the Action field, toggle to the Update option, and press <Enter>.
  • Page 100 ......The following error messages could appear as you enter information on the IPX User Access Configuration screen.
  • Page 101 Used by the TCP/IP protocol stack to dynamically bind Protocol an IP address with a MAC address. This is defined in RFC826. Autodiscovery The ability of a network manager to discover the node address and functionality of network devices. The 2824 hub supports IP and IPX autodiscovery.
  • Page 102 Boot Sectors The 2824 hub uses a 112KB sector of a Flash memory device as the firmware boot sector. The boot sectors can be modified by downloading the Flash. The update capability of boot allows the upgrade of network download firmware.
  • Page 103 TCP/IP. Internet Protocol. A protocol that provides connectionless, best-effort datagram delivery service. IP Address The Internet Protocol address assigned to a hub, module, or node. Internetwork Packet Exchange. A Novell NetWare protocol that provides a connectionless datagram service.
  • Page 104 The Ethernet MAC address is a 6-byte node address. All Ethernet node addresses are unique. Manageable A hub is manageable if it does not contain management agent firmware. Manageable units can be managed only if they are attached to a managing unit.
  • Page 105 The number of octets (bytes) received without error. Partition The electrical disconnecting of a node from a LAN at its point of connection to a hub. The node remains physically attached. A node can be autopartitioned by the hardware based on network errors.
  • Page 106 SNMP based management consoles and remote monitors. The RMON MIB specifies 9 groups of which 4 are supported by the 2824 hub: statistics, history, alarm, and events. Router A program that connects two networks together. Routers...
  • Page 107 Serial Line IP A protocol that provides a method of transporting IP datagrams over a serial connection. Service Advertising A protocol that sends service information to all nodes on Protocol an IPX network. Simple Network A protocol used by network management stations to Management Protocol communicate management information over a UDP/IP or IPX network.
  • Page 108 Protocol service using IP. It adds the ability to distinguish among multiple destinations within a given host. See Unshielded Twisted Pair. XMODEM Protocol XMODEM is a serial communications protocol used to transfer ASCII or binary data. XMODEM uses 8-bit characters and transfers data using 128-byte blocks, each of which is followed by a checksum or CRC.

  • Page 109: Download Problems

    MIB 5-3 Netelligent Management Software 5-8 SAP ID 5-21 parameters 5-20 Component description 1-5 Configuration parameters 5-2 Configuring hub for management 4-1 Connection speed 1-11 Copper wire 2-3 CpqnIpAddr MIB 5-5 CpqnIpFrameType MIB object 5-5 Crossover twisted-pair wiring 2-4 CSMA/CD 2-3...

  • Page 110: Interconnecting Hubs

    Group change 5-12 Hexadecimal value 5-21 History control table 5-14 History group 5-14 HMI hubs 5-9 HMI-compliance mechanism 5-10 Host hub 3-9 HOST setting 3-7 HOST/TARGET switch 1-2, 1-9, 3-6 attaching rubber feet 3-1 invalid connections 3-7 mounting 3-1 positioning in rack 3-2...
  • Page 111 Log table 5-16 Login screen 4-5 Logout screen 4-7 MAC address 4-7, 5-20 Main menu screen 4-5, 4-6 MAN setting 3-8, 3-9 MAN/UNM switch 1-10 Manageable hub 1-1 Management agent 1-1 features 5-1 firmware 1-1 methods 5-1 Management Agent Configuration...
  • Page 112 STATUS LED 1-7, 3-7, 3-8, 4-7, 5-18 Stop bits 4-3 Straight-through twisted-pair wiring ST-type connector 2-4, 3-3 Subnet mask 4-7 SW EN/SW DIS switch 1-10, 3-6 System description 5-21 object ID 5-20 planning charts 2-5 Target hub 3-9 TARGET setting 3-7, 3-8...
  • Page 113 TCP 5-6 Telnet 1-8, 5-3, 5-5, 5-6, 5-10, 5-18 Telnet VT100 5-17 Temperature 2-1 Terminal emulation 4-1 TFTP 5-6, 5-17 serial COM port operation 1-8 Threshold 5-16 Topologies, Ethernet 5-4 Twisted-pair specifications 2-2 cable 3-5 TX connector 3-3 UNM setting 3-7, 3-8 UNM/MAN switch 3-6 Unmanaged stack 3-6 Unshielded twisted pair 2-3...
  • Page 114 ©1997 Compaq Computer Corporation. All rights reserved. Compaq Registered U.S. Patent and Trademark Office. Company and product names mentioned herein may be trademarks and/or registered copyright and trademarks of their respective companies.

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Netelligent 2824

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