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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTICE The information in this publication is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL. This publication contains information protected by copyright.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Federal Communications Commission Notice 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. Many electronic devices, including computers, generate RF energy incidental to their intended function and are, therefore, covered by these rules.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Japanese Notice Fiber Port Class 1 Classification 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. Product Label 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii Lithium Battery The non-volatile RAM (NVRAM) chip on the motherboard of the Netelligent 2824 hub contains a nonreplaceable lithium battery. Only trained service personnel should dispose of this chip. La puce mémoire non volatile contient une pile au lithium non remplaçable. L'élimination de cette puce devrait être confieé à un personnel qualifié. Writer: Chris Seiter Project: Notice 2 Comments: 299440-001 File Name:2824_N2.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Contents Chapter 1 Overview Features......................................................................................................................... 1-2 Package Contents.......................................................................................................... 1-4 Hub Components .......................................................................................................... 1-5 RJ-45 Ports ......................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x Chapter 3 Installing the Hub Mounting the Hub......................................................................................................... 3-1 Attaching the Rubber Feet..................................................................................... 3-1 Rack-Mounting the Hub ........................................................................................ 3-1 Installing a Smart Uplink Module ..............................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Traps .................................................................................................................... 5-11 RMON Support........................................................................................................... 5-13 Statistics Group.................................................................................................... 5-13 History Group .............................................................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii Changing the Password.............................................................................................. B-17 Downloading Firmware ............................................................................................. B-19 Setting Up the Serial Port .......................................................................................... B-21 Configuring User Access ...........................................................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Overview Features The 2724/2824 hub provides the following set of features: 24 RJ-45 ports allows 10 Mb/s or 100 Mb/s connections by autodetecting the wire speed. 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Rack Mount Kit lets you install the hub in a standard EIA 19-inch equipment rack. 10/100 Switch Enable/Disable lets you enable or disable the internal 10/100 switch if the network uses an external bridge or router. Multicast/Broadcast Filtering allows the hub to forward or block multicast and broadcast packets independently on both the 10 and 100 Mb/s segments.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 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. Figure 1- 2. 2724/2824 Hub Front Panel with Smart Uplink Module Installed RJ-45 Ports The hub’s RJ-45 ports allow connections to UTP cabling to workstations and servers in a 10Base-T or 100Base-TX network.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Overview Figure 1- 3. Smart Uplink Modules The SUM provides two status LEDs: activity and collision. The activity LED is a solid green when the link is active and flashes green when there is activity on the port. The collision LED flashes yellow when a collision is detected and lights solid yellow when the port is disabled. The collision LED does not reflect conditions at the SUM’s hub port, only at the external interface port.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Table 1-1 2724/2824 LEDs LED Status and Description POWER Green The power supply is operating properly. Off The hub is not powered on. STATUS 2824 Managing Hub: Off A basic failure occurred where the firmware agent cannot execute code or the LED control cannot be accessed Yellow The firmware agent is in the process of booting up and is not ready for management processing.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 See Chapter 4 “Configuring the Hub for Management” and Appendix B “Using the VT100 Interface” for more information about the serial port. 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Overview Managed/Unmanaged DIP Switch 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. When the switch is set to “MAN,” the hub sets the initial 100 Mb/s port enable/disable and backplane connection status. When the switch is set to “UNM,” the initial 100 Mb/s port and backplane status is set to the hardware default (enabled).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 If the switch is set to “10/100,” you can force 10 Mb/s connections using the n2fePortAutoNegCapAdvertised MIB variable. However, if the switch is set to “10 ONLY,” the hardware forces the connection speed and cannot be changed by the management agent. To view the status of this switch, see the n2feForce10 Mb/sSwitchStatus MIB variable. NOTE : This switch must be set to 10 ONLY if you set the 10 MDI / 10/100 MDI-X switch to 10 MDI.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Overview Segmentation 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Chapter 2 Planning Installation This chapter contains installation requirements and system planning charts that will help you prepare for installing the hub. Installation Requirements To help ensure a correct installation, read this section to determine the environmental, electrical, spatial, and cable requirements.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Planning Installation CAUTION: The power outlet must be a non-switched, three-pronged, grounded outlet. Do not use a three-to-two pronged adapter at the outlet. Doing so may result in electrical shock and/or damage to the hub and will void your warranty. Spatial Requirements 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 100Base-TX 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. Unshielded Twisted Pair (UTP) ■ 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. Figure 2- 1.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Planning Installation Table 2-2 Crossover Twisted-Pair Wiring Twisted Pair Number Pin Number To Pin Number 1 2 Signal Description TD+ TD- ➔ ➔ 3 6 Signal Description RD+ RD- 1 2 3 6 RD+ RD- ➔ ➔ 1 2 TD+ TD- 100Base-FX 100Base-FX is the IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two strands (one pair) of fiber optic cable.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 System Planning Charts The charts in Figures 2-2 and 2-3 provide a convenient way of planning the connections for your hub. Figure 2- 2. Hub Setup and Cabling Chart Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide Writer: Chris Seiter Project: Planning Installation Comments: 299440-001 File Name:2824_2.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Planning Installation Figure 2- 3. Rack Inventory Chart Writer: Chris Seiter Project: Planning Installation Comments: 299440-001 File Name:2824_2.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Chapter 3 Installing the Hub This chapter explains how to mount the hub, attach cables, and connect power. Mounting the Hub You can place the hub on a level surface (table top or shelf, for example) or mount it in a standard EIA 19-inch rack. Attaching the Rubber Feet If you will place the hub on a table top or shelf, attach the supplied adhesivebacked rubber feet, as described in the following steps. 1.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Installing the Hub To attach the brackets, follow these steps: 1. 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.) 2. Position the bracket as shown in Figure 3-1 and secure it with the smaller bracket screws. Then attach the remaining bracket to the other side of the hub. Figure 3- 1. Attaching the Mounting Brackets 3.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Installing a Smart Uplink Module The Netelligent 2724/2824 hubs have a Smart Uplink slot that lets you install one of the following optional Smart Uplink modules (SUMs): ■ ■ ■ ➀ 100Base-TX version (Part No. 267045-001) ➁ 100Base-FX (fiber) version with ST connector (Part No. 267042-001) ➂ 100Base-FX (fiber) version SC connector (Part No. 267043-001) c d e Figure 3- 3.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Installing the Hub 2. Remove the Smart Uplink port cover plate from the hub’s front panel. 3. Insert the Smart Uplink module through the port hole, aligning the sides of the SUM with the card guides inside the hub (Figure 3-4). Figure 3- 4. SUM Installation 4.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Connecting Cable Each RJ-45 port on the hub can accept a standard 8-wire twisted-pair (UTP) cable that ends with RJ-45 connectors. This type of cable can be up to 100 meters (328 feet) in length. A 100Base-FX port on a SUM can accept multi-mode 62.5/125 to 100/150 micron fiber cable that ends with fiber SC-type connectors. This type of cable can be up to 2 Km in length at full-duplex operation.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Installing the Hub Interconnecting Hubs You can interconnect two manageable 2724 hubs to create an unmanaged stack. Or, you can interconnect up to four manageable 2724 hubs with one managing 2824 hub for a fully managed stack. You can also interconnect the 2724 and 2824 hubs with Netelligent 2524 (manageable) and 2624 (managing) hubs. NOTE : Only one managed hub (2824 or 2624) is allowed in a single stack.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 HOST/TARGET ■ TARGET (Factory default setting) Lets you connect one, two, three, or four 2724 hubs to a 2824 managing hub to form a “managed” dualspeed 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). One hub must be re-configured as the HOST and the other as the TARGET.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 Installing the Hub ■ MAN (Managed) (Factory-default setting) In this mode, the port configuration settings for the 2724 hub are non-volatile. In addition, if you remove the 2724 hub from the stack, the disabled ports remain disabled. (You can re-enable them by setting the DIP switch to UNM and turning the hub off and then back on.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 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. Figure 3- 7. Interconnecting Two 2724 Hubs Via a Backplane Connection Cable In this example, the unmanaged stack consists of the maximum of two 2724 hubs. Either hub in the stack can be the HOST or the TARGET.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 Installing the Hub Connecting Power Follow these steps to connect the hub to power: 1. Plug the power cord into the power connector on the back of the hub. 2. Insert the three-pronged plug on the power cord into a non-switched grounded power source. The power source should be near the hub and easily accessible. Figure 3- 8.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Disconnecting Power To power down the hub, disconnect the power cord from the power source. Do not power down the hub by disconnecting the power cord from the back of the hub. Connecting to the Serial Port To enable management of the hub, you must first set its IP address (See Chapter 4 – “Setting the IP Address”). One way to set the IP address is through the hub's built-in VT100 interface.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 Installing the Hub Figure 3- 9. Local Connection via Null Modem Writer: Chris Seiter Project: Installing the Hub Comments: 299440-001 File Name:2824_3.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 Figure 3- 10. Remote Connection via Regular Modem Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide Writer: Chris Seiter Project: Installing the Hub Comments: 299440-001 File Name:2824_3.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Chapter 4 Configuring the Hub for Management 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Configuring the Hub for Management 3. Type a name for the connection (for example, “IP Setup”) and click on OK. Figure 4- 1. Connection Description Screen 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. Writer: Chris Seiter Project: Netelligent 2724/2824 10/100Base-T Hub User Guide Comments: 299440-001 File Name:2824_4.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Figure 4- 2. Phone Number Dialog Box 5. Enter the following port settings in the dialog box and click on OK. ❏ Bits per second: 9600 ❏ Data bits: 8 ❏ Parity: None ❏ Stop bits: 1 ❏ Flow control: None Netelligent 2724/2824 10/100Base-T Hub User Guide Writer: Chris Seiter Project: Netelligent 2724/2824 10/100Base-T Hub User Guide Comments: 299440-001 File Name:2824_4.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Configuring the Hub for Management Figure 4- 3. COM1 Properties Dialog Box 6. Enter the following command: vt100 The Login screen appears. NOTE: If the login fails, you may need to retry the connection several times. Writer: Chris Seiter Project: Netelligent 2724/2824 10/100Base-T Hub User Guide Comments: 299440-001 File Name:2824_4.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Figure 4- 4. Login Screen 7. Within 20 seconds after the Login screen appears, type and enter the word “public,” which is the default password. The Main menu screen appears. Figure 4- 5. Main Menu Screen Netelligent 2724/2824 10/100Base-T Hub User Guide Writer: Chris Seiter Project: Netelligent 2724/2824 10/100Base-T Hub User Guide Comments: 299440-001 File Name:2824_4.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Configuring the Hub for Management 8. Highlight Option B, Management Agent Configuration, using the down arrow key or key. Then press . The Management Agent Configuration screen appears. Figure 4- 6. Management Agent Configuration Screen 9. Use the arrow or tab keys to move to the IP Address field. Then enter the IP address for the Ethernet interface.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Setting the IP Address Using a BOOTP Server You can configure a BOOTP server to supply the IP address, subnet mask, and gateway IP address for the hub. Once the BOOTP server is configured with the desired settings, it automatically configures the hub in response to the hub’s BOOTP requests. The 2824 hub has two boot phases: Boot and Runtime.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Chapter 5 Managing the Hub This chapter discusses the management functions of the Netelligent 2824 hub.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Managing the Hub Network Configuration Parameters and Modification Methods Network Configuration Parameters Modification Methods Default Parameter Setting BOOTP VT100 SNMP IP address 9 9 9 0.0.0.0 IP network mask 9 9 9 Derived from IP address IP gateway 9 9 9 0.0.0.0 SLIP IP address 9 9 0.0.0.0 SLIP IP network mask 9 9 Derived from SLIP address SLIP IP gateway 9 9 0.0.0.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 SNMP Management The 2824 hub supports SNMP management through both in-band and out-ofband communications. In-band management support is provided by SNMP over IP and IPX protocol stacks and VT100 emulation over Telnet (TCP/IP). Out-ofband management support is provided by SNMP over SLIP and through direct serial interfaces using VT100 emulation.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 Managing the Hub Supported Frame Types Ethernet Frame Type Novell Name IP IPX DIX Ethernet II ETHERNET_II 9 9 IEEE 802.3 with 802.2 SNAP Headers ETHERNET_SNAP 9 9 IEEE 802.3 with 802.2 LLC Headers ETHERNET_802.2 9 IEEE 802.3 Raw ETHERNET_802.3 9 IP Frame Types The hub supports both ETHERNET_II and ETHERNET_SNAP for its Ethernet IP communications. The default frame type is ETHERNET_II.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 The hub’s IP frame type can be set by three different methods: ■ 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. NOTE: If the hub transmits BOOTP requests over two frame types, this lengthens the time required to complete the BOOTP process.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Managing the Hub IP Protocols The hub supports the following IP protocols: UDP (User Datagram Protocol) Provides non-guaranteed delivery service over IP. The hub implements a full UDP stack. Supports IP fragmentation maximum packet size of 1520 bytes. ARP (Address Resolution Protocol) Allows discovery of the hardware address associated with a given IP address ICMP (Internet Control Messages Protocol) Provides error and control messages.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7 Generic IP autodiscovery works by looking at the addresses cached by routers and gateways. These caches are periodically flushed. For a node to remain in the gateway’s cache, it must transmit at least as often as the cache is flushed. The 2824 hub implements IP autodiscovery via two MIB objects, each of which is stored in non-volatile memory.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 Managing the Hub Since Novell uses ETHERNET_802.2 as the default frame type for IMPORTANT: IPX, the default IPX frame type of the hub is also ETHERNET_802.2. 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9 IPX Protocols The hub supports the following IPX protocols: IPX Protocol Function SNMP (Simple Network Management Protocol) Functions the same as SNMP over IP. All SNMP features available over IP are available over IPX. Novells ManageWise uses SNMP over IPX to manage HMI hubs, which the hub emulates. IPX Diagnostics Allows a node to report which IPX functions it supports.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10 Managing the Hub IPX Autodiscovery The hub supports Novell IPX autodiscovery through its HMI-compliance mechanism so that management platforms, such as Novell’s ManageWise, can automatically discover managing hub. 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).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 Traps To receive a trap, the SNMP network management station must place its IP or IPX address into the appropriate trap destination table of the Netelligent Unified MIB (CPQNUNIF). The trap destination tables are listed below: ■ For IP traps, the destination table is cpqnIpTrapDestTable ■ For IPX traps, the destination table is cpqnIpxTrapDestTable Each IP and IPX trap tables can contain a maximum of ten entries.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 Managing the Hub HUBNVLE* * Health enterpriseSpecific(6): nSnmpDot3RptrMgt.1 rptrBasHealthState, rptrBasHealthText, rptrBasHealthData, rptrBasID, rptrExtName Group Change enterpriseSpecific(6): nSnmpDot3RptrMgt.2 rptrBasGroupMap, rptrBasId, rptrExtName Reset enterpriseSpecific(6): nSnmpDot3RptrMgt.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 RMON Support 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 Managing the Hub History Group The history group tracks the network load over a period of time. The history group consists of the History Control Table (historyControlTable) and the Ethernet History Table (etherHistoryTable). The historyControlTable defines the way in which samples are taken and specifies the data source, the polling interval, and the number of samples (“buckets”) to store.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15 Alarm Group The alarm group provides a means of generating an “alarm” when a specified MIB variable exceeds a specified threshold. Each alarm is associated with an “event” defined in the RMON Event group. The same event can trigger multiple alarms. An RMON “event” can be used with the RMON Event group to issue notifications (such as SNMP traps) to the user. The alarm group consists of the Alarm Table (alarmTable).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16 Managing the Hub 2. b. greater than or equal to the rising threshold, and if the value of alarmStartupAlarm is risingAlarm(1) or risingOrFallingAlarm(3), then a rising-alarm event is generated. c. greater than or equal to the rising threshold, and if the value of alarmStartupAlarm is fallingAlarm(2), then a rising-alarm event is generated after having fallen below the rising threshold.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18 Managing the Hub All firmware downloads occur from the Boot operating mode. If you start a download while in Runtime mode, the 2824 hub returns to the Boot mode before downloading the firmware. In this case, the STATUS LED turns yellow to indicate the 2824 hub has returned to the Boot operating mode. No SNMP management is available during a firmware download. The firmware downloaded to the 2824 hub contains both Boot and Runtime binary files.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19 Parameters Stored in NVRAM 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20 Managing the Hub Compaq Specific Parameters The following parameters are specific to the Compaq Netelligent 2824 hub. ■ Ethernet Node Address Range — The 2824 hub must have six unique node (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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21 ■ sysDescr — The system description string contains the following line: Compaq Netelligent 2000 Fast Ethernet Repeater ■ SAP ID — This is a Compaq SAP ID registered with Novell. Its hexadecimal value is b105. This advertises the Netelligent 2824 service. Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide Writer: Chris Seiter Project: Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide Comments: ile Name:2824_5.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Appendix A Specifications The following specifications list the physical, electrical, and environmental characteristics of the 2724/2824 Dual-Speed Hub. Physical ■ 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Appendix B Using the VT100 Interface 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 Using the VT100 Interface Starting the VT100 Interface After you make the required connections and set up the communications program, follow these steps to start the VT100 interface. NOTE : The VT100 interface allows only one active user at a time. For example, if an active VT100 session is using Telnet over Ethernet, another session cannot occur over the serial or Ethernet connections. 1. Start the communications program.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3 Figure B- 2. Main Menu Screen The main screen displays the Preboot, Boot, and Runtime firmware versions in the lower left corner of the screen. The version identifiers are “P” for Preboot, “B” for Boot, and “R” for Runtime. The value inside the brackets is the version number.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4 Using the VT100 Interface CAUTION: Resetting the password to the default also resets all other durable configuration parameters to their factory settings. Basic Update Fields All screens except the Login Screen have three standard update fields that are periodically updated. n n n System Name This field, located at the upper-left corner of each screen, indicates the system name.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6 Using the VT100 Interface Displaying a Data Screen To select a data screen from the menu, enter the letter that corresponds to the option, or use the arrow keys to highlight the option. Then press . The following table shows the available VT100 screens in the Boot and Runtime operational modes for direct serial port and Telnet connections. Runtime is the normal mode of operation.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7 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. Toggle fields are enclosed in arrow brackets (< and >). To edit a data entry field, highlight the field and enter the desired text. To edit a toggle field, highlight the field and press the space bar to toggle through the available options.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8 Using the VT100 Interface Viewing System Information The System Information screen shows basic information about the system in which the hub operates. Figure B- 3.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-10 Using the VT100 Interface Viewing the Management Agent Configuration 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-11 ■ IP Frame Type — Options include Ethernet II and Ethernet 802.2 SNAP. For management agents that do not have an Ethernet frame type, such as the serial port, the default frame type setting is Not Supported. ■ IPX Frame Type — Options include Ethernet II, Ethernet 802.3, Ethernet 802.2, and Ethernet 802.2 SNAP. For management agents that do not have an Ethernet frame type, such as the serial port, the frame type setting is Not Supported.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12 Using the VT100 Interface Viewing Port Statistics The Port Statistics screen displays statistics for specific ports on the hub. Figure B- 5.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-13 Port State — Select Enabled or Disabled to enable or disable a port. The changed setting takes effect immediately. To scroll forward or backward to other ports, move the cursor to the Scroll field and press the < and > keys. To scroll forward or backward to other units, move the cursor to the Scroll field and press the - and + keys.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14 Using the VT100 Interface 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-15 Viewing and Editing the Backup Port Configuration 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. Figure B- 7. Backup Port Configuration Screen Adding a Backup Port Entry To add a backup port entry, follow these steps: 1.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16 Using the VT100 Interface 3. Move the cursor to the Backup Unit entry field. Then enter the number of the desired backup unit. 4. Move the cursor to the Backup Port entry field. Then enter the number of the desired backup port. 5. Move the cursor to the State entry field and press the space bar to select Enable or Disable. 6. Move the cursor to the Action field and press the space bar until Add appears. 7. Press the Enter key.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-17 5. Press the Enter key. Error Messages The following error messages may appear if you enter information incorrectly in the Backup Port Configuration window: ERROR: Unable to set backup port ERROR: Unable to set backup status ERROR: Unable to delete ERROR: Unable to update status 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-18 Using the VT100 Interface Figure B- 8. Change VT100 Password Screen 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). CAUTION: Resetting the password to the default also resets all other durable configuration parameters to their factory settings.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-19 Downloading Firmware 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. Null modem SLIP connections can only occur at 9600 baud.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-20 Using the VT100 Interface 4. 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. 5. To execute the download, position the cursor on the Start download field and press . Or, to cancel the download and return to the Main menu screen, position the cursor on the Return to menu field and press the Enter key.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-21 Setting Up the Serial Port The Serial Port Setup screen lets you set up the hub’s serial port configuration parameters. The Current Baud Rate field shows the baud rate that the serial port is currently operating on. Figure B- 10. Serial Port Setup Screen The Serial Port Setup screen lets you modify the following information: Port Number — This field applies only to multi-serial port systems.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-22 Using the VT100 Interface Send Init String — Select “Enabled” or “Disabled” to enable or disable the hub’s ability to allow the serial port to send out the modem initialization string. The default setting is “Enabled.” Initialization string — This information is the text string to initialize the modem.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-23 Configuring User Access 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. (You Enable/Disable Telnet through the System Information screen.) When you select the User Access Configuration option, the following menu appears. From this menu, select the desired address type (IP or IPX). Figure B- 11.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-24 Using the VT100 Interface Configuring IP User Access The IP User Access Configuration screen lets you configure IP user access parameters. Each entry specifies an IP address range via an address mask, address match, write community string, and access description. Figure B- 12. IP User Access Configuration The hub’s management agent lets you specify a range of authorized addresses or a list of individual nodes.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-25 Example 1 Suppose a user wanted all nodes on a specific IP or IPX segment to have SNMP access. In this case, the address mask should have 1s in the network part of the IP/IPX address and 0s in the node part of the address. The address match should have the network number in the network part of the IP/IPX address and 0s in the node part of the address. Mask Match Result 255.255.255.0 143.162.103.0 All nodes on IP network 143.162.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-26 Using the VT100 Interface Access Options 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. RO/Telnet — Allows only read access but the station can initiate a Telnet session.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-27 2. Move the cursor to the edit line and modify the three edit fields as desired. 3. Move the cursor to the Action field, toggle to the Update option (using the space bar), and press . The new configuration immediately takes effect. If there are any configuration errors, an error message appears. You can configure up to eight entries without exiting the screen. Repeat Steps 1-3 to modify additional entries.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-28 Using the VT100 Interface Configuring IPX User Access The IPX User Access Configuration screen lets you configure IPX user access parameters. Each entry specifies an IPX address range via an address mask, address match, write community string, and access description. Figure B- 13. IPX User Access Configuration The hub’s management agent lets you specify a range of authorized addresses or a list of individual nodes.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-29 Adding an Entry Follow these steps to add an entry. 1. Move the cursor to the Action field, toggle to the Add option (using the space bar), and press . 2. Enter the information for the new entry in the edit line. 3. Move the cursor to the Action field, toggle to the Update option, and press . Modifying an Entry You can configure up to four entries for IPX access. To modify an entry, follow these steps: 1.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-30 Using the VT100 Interface Error Messages The following error messages could appear as you enter information on the IPX User Access Configuration screen. ERROR: Invalid address mask and address match pair Logging Out of the Management Session The Logout screen lets you end the VT100 management session. If you select Yes, the Login screen reappears and you have 10 seconds to retype the password if desired. Otherwise, the VT100 session ends.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1 Glossary 100Base-FX An implementation of the IEEE 802.3 Fast Ethernet standard on multimode fiber cable with SC-type connector with one pair of fiber cable. Stations are connected using a star topology. 100Base-TX An implementation of the IEEE 802.3 Fast Ethernet standard on Category 5 UTP with two pairs of wires. Stations are connected using a star topology. The maximum segment length is 100 meters. 802.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2 Glossary 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. BOOTP Bootstrap Protocol.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3 Flash A memory device that allows unlimited read and limited write (approximately 100K) cycles. FCS See Frame Check Sequence Errors. Frame Alignment Errors A frame alignment error occurs when a packet is received but not properly framed (that is, not a multiple of 8 bits). Frame Check Sequence Errors Errors that occur when a packet is involved in a collision or is corrupted by noise.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4 Glossary Jabbering Continuous transmission from a node, generally as a result of hardware or firmware failure. Latency The time duration from when the first preamble bit of a packet enters one port to when the first preamble bit of that same packet exits another port. Link Test A link test is performed by the port hardware before transmit and receive functions are enabled to ensure the integrity of the cable (the link).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-5 network. NMS, Novell Novell's NMS (NetWare Management System) is an integrated network management system that provides a platform for managing a multivendor, heterogeneous network environment. NMS can autodiscover network services by monitoring transmitted SAP IDs. NMS is part of ManageWise. Nonvolatile Random Access Memory Electronic circuitry that provides back-up operation of CMOS RAM and/or Flash PROM in case of a power failure.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6 Glossary RJ-45 An 8-wire modular connector used for 10Base-T Ethernet and some telephones. RMON Remote Monitor MIB defines standard network monitoring functions and interfaces for communications between 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.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7 Serial Line IP A protocol that provides a method of transporting IP datagrams over a serial connection. Service Advertising Protocol A protocol that sends service information to all nodes on an IPX network. Simple Network Management Protocol A protocol used by network management stations to communicate management information over a UDP/IP or IPX network. SLIP See Serial Line IP. SNMP See Simple Network Management Protocol.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-8 Glossary Protocol service using IP. It adds the ability to distinguish among multiple destinations within a given host. UTP 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.
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