HP 10:10 LAN Bridge MB Installation And Reference Manual

Text of HP 10:10 LAN Bridge MB User Guide:

• HP 10:10 LAN Bridge MB, BNC connector Any of several connectors used for thin coaxial cable. There are male and female connectors used to connect sections of a LAN and the “T” connector used for attaching devices to the cable. bridge A device providing an intelligent connection between two otherwise independent LANs. Bridges operate at layer 2 of the ISO OSI reference model. A bridge inspects every packet originating on either LAN and creates a table of nodes and their locations. It isolates the LANs from each other, allowing both sides to pass traffic internally. If a transmission from one LAN is addressed to a node on the oth

• HP 10:10 LAN Bridge MB, Static Addresses. Static addresses are entries that you manually add to the address table. These addresses remain in the address table until you intentionally delete them. The effect of these addresses varies depending on the operating state of the bridge: In learning mode (either Learning or Learning/STP operating states), you add static entries to the table to prevent communication to specific nodes. In learning mode, if a packet is received with a destination address that matches a static entry in the address table, the p

• HP 10:10 LAN Bridge MB, Safety Information Safety Symbols Documentation reference symbol. If the product is marked with this symbol, refer to the product documentation to get more information about the product. WARNING A WARNING in the manual denotes a hazard that can cause injury or death. CAUTION A CAUTION in the manual denotes a hazard that can damage equipment. Do not proceed beyond a WARNING or CAUTION notice until you have understood the hazardous conditions and have taken appropriate steps. Grounding This is a safety class I product and has a protective earthing termi

• IPX Addressing Notes: Because the IPX address is assigned automatically, no IPX configuration is necessary; no IPX configuration is provided on the bridge console interface. By default, the bridge is ready to be managed by an SNMP network management station that is configured for IPX communications. If the bridge is part of a network that is running IPX only, you do not

• Firmware Enhancements Hewlett-Packard continually tests and improves its products. When firmware enhancements are made to the HP 10:10 LAN Bridge MB, you will be able to easily update it with the new code. The update can be made from a PC attached to the bridge’s console port (directly or through a modem), or the bridge’s new code can be downloaded over the network

• HP 10:10 LAN Bridge MB, 5 Troubleshooting This chapter covers these topics: Basic troubleshooting tips Diagnosing with the LEDs Diagnostic tests – Testing the bridge only – Testing the bridge and LANs – Testing the links Basic Troubleshooting Tips Make sure the bridge is plugged in and that cable connections are secure. Note that during self-test and initialization, the bridge executes external loopback tests. The bridge will not pass self-test until viable networks or loopback connectors are attached to the ports. These connections should be made before the bridge is plugged in to a power source. If the ThinLAN BNC conne

• HP 10:10 LAN Bridge MB, TEstlink Runs a test of the link between the bridge and another addressable device (a destination node) by sending IEEE 802.2 “test” packets to that node. You are prompted for: the destination node’s station address. the number of test packets to try. the timeout value (how many seconds the bridge will wait for a response from the destination node before reporting an error). A one-second timeout value is usually sufficient. Note The destination node must be an 802.3 device that can respond to the test packets. Ethernet devices do not recognize 802.2 test packets. See chapter 5, “Troubleshooting”, for more information on using

• HP 10:10 LAN Bridge MB, 4 Operation Console Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Main Menu Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Config Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Status Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 Resetting the Bridge . . . . . . . . . . . . . . . . . . . . . .

• Configuration Commands ADdress Table Enter AD at the Config prompt to start the address table command. You are prompted to add, delete, or read address table entries. The ADd and DElete commands affect only the static address table entries. Enter HE at the add, delete, or read prompts to get help on completing these tasks. Default Configuration: no static entries

• HP 10:10 LAN Bridge MB, 4 Operation The HP 10:10 LAN Bridge MB is designed to operate unattended. The console interface allows you to customize the bridge’s configuration, to monitor its status and activity, and to run diagnostics if the bridge or network encounters problems. Additionally, self-test routines can be run on the bridge to test its hardware and firmware and to remove some transient problem conditions. The self-test routines are run by resetting the bridge. (You can also perform these and other functions with the HP network management products

• HP 10:10 LAN Bridge MB, starting a console session . . . . . . . . . . . . . . . . . . . . . 3-2 static address adding to the address table . . . . . . . . . . . . . . . . . . . 3-5 definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 deleting from the address table . . . . . . . . . . . . . . . . 3-5 effect in learning mode . . . . . . . . . . . . . . . . . . . . . 6-4 effect in secure mode . . . . . . . . . . . . . . . . . . . . . 6-4 station address determining the bridge’s address . . . . . . . . . . . . . . . 4-9 list of known vendor

• Diagnosing With the LEDs Table 5-1 shows the LED patterns you will see if the bridge or network has a fault during self-test. Table 5-2 shows the LED patterns for a bridge or network fault during operation. Table 5-1. LED Patterns Showing Self-test Failures LEDs Suggested Actions Line On (on front) Fault (front and back) Pwr (on back) Self-test Net Fail OFF * * * * Check power cord and power

• HP 10:10 LAN Bridge MB, RS-232-C Cable for HP 110 Minimum Pin-Out HP 110 end 9-pin male Bridge end 25-pin male Tx 2 2Tx Rx 3 3Rx GND 7 7 GND 5CTS 6DSR 8DCD 22 RI 23 DRS Null-Modem Adapter (use with a modem cable when connecting a terminal) Minimum Pin-Out Modem cable end 25-pin female Bridge end 25-pin male 2 3 4 5 6 8 20 7 2 3 4 5 6 8 20 7 OR 4 5 4 5 DTR (pin 20) and RTS (pin 4) must be on, or high, on your terminal or in your terminal emulation program. Cables and Connectors A-7

• HP 10:10 LAN Bridge MB, Printed in Singapore 4/98 Manual Part Number 28673-90001 *28673-90001* Technical information in this document is subject to change without notice. ©Copyright Hewlett-Packard Company 1990, 1992, 1998. All rights reserved. Reproduction, adaptation, or translation without prior written permission is prohibited except as allowed under the copyright laws. Less Work, More Network HP Networking HP 10:10 LAN Bridge MB Installation and Reference Guide For world-wide support on all HP Network Connectivity Products visit our web site at: http://www.hp.com/go/network_city HP 10:10 LAN Bridge MB Installation and Reference Guide

• HP 10:10 LAN Bridge MB, Network Address. The communication between the bridge and the network management station requires that the bridge be assigned a network address. For Novell NetWare networks, the network address is an Internetworking Packet Exchange (IPX) address; for TCP/IP networks, the address is an Internet Protocol (IP) address. If you are using the bridge in a Novell NetWare network, it can be automatically configured with an IPX address from a file server or router running IPX on the network. The bridge is preconfigured to enable this function. If the bridge is in a TCP/IP network, you manually configure the bridge w

• For Rack or Cabinet Mounting: 1. Using a Phillips or cross-head screwdriver, attach the mounting brackets to the bridge with 10-mm M4 screws (included in accessory kit). Note that the bridge’s case and the mounting brackets are designed to allow you to rack mount the bridge with either the back or the front facing out. 2. Position the bridge in the rack or cabinet and slide it up or do

• HP 10:10 LAN Bridge MB, Regulatory Information The product described in this document complies with specific international regulations. See the document section entitled “Regulatory Statements” for the applicable regulatory information. Informations concernant la réglementation Le produit décrit dans le présent document satisfait à des normes internationales spécifiques. Pour plus de détails sur les réglementations applicables, reportez-vous à la section «Regulatory Statements». Informationen über Kontrollvorschriften Das in diesem Dokument bes

• HP 10:10 LAN Bridge MB, Console Commands The procedures to connect a terminal to the bridge’s console port and to start a console session have already been covered in chapter 3, “Configuration” under “Starting a Console Session”. This section describes the rest of the console interface commands. The bridge’s console interface is command driven and has three menus of commands: Main Menu commands are used to set certain console session characteristics, to run diagnostics, and to access the other menus. Config Mode commands are used to customize the bridge configuration and to edit the address table. Status Mode commands are used to check the bridge status, to gather br

• Starting a Console Session Connect a terminal to the bridge’s console port directly or through modems, as described below. Any terminal or terminal emulation program that can communicate using the ASCII TTY driver mode can be used. Connecting a Terminal Directly 1. Connect a terminal, or a PC emulating a terminal, to the console port using an RS-232-C “crossover” cable. For p

• HP 10:10 LAN Bridge MB, Informations concernant la sécurité Symboles de sécurité Symbole de référence à la documentation. Si le produit est marqué de ce symbole, reportez-vous à la documentation du produit afin d’obtenir des informations plus détaillées. AVERTISSEMENT Dans la documentation, un AVERTISSEMENT indique un danger susceptible d’entraîner des dommages corporels ou la mort. ATTENTION Un texte de mise en garde intitulé ATTENTION indique un danger susceptible de causer des dommages à l’équipement. Ne continuez pas au-delà d’une rubrique AVERTISSEMENT ou ATTENTION avant d�

• HP 10:10 LAN Bridge MB, Loopback Connectors The three loopback connectors shown below are useful for troubleshooting your HP 10:10 LAN Bridge MB. These connectors are included in the HP Extended LAN Troubleshooting Kit, product number HP 28689B, or all three can be purchased separately. Contact your HP-authorized LAN dealer or your local HP sales office for assistance. For AUI Port HP part number 28663-63001. The following pins are connected: pin 3 to pin 5 pin 10 to pin 12 For ThinLAN Port HP part number 5061-4990. BNC “T” with two 50-ohm terminators attached. For Console Port HP part number 5062-3355. The following pins are connected: pin 2 to pin 3 pin 4 to pin 5 to pin 8 pin 6 to pin

• HP 10:10 LAN Bridge MB, Features The HP 10:10 LAN Bridge MB has these features: Filters and forwards packets as fast as the network can operate (media-speed performance). Automatically learns the addresses and locations of the nodes on the attached LANs. Has a configurable address table that holds up to 512 station addresses (also called MAC addresses, Ethernet addresses, or physical addresses). Has a secure mode to control communications between nodes. Supports the IEEE 802.1 spanning tree protocol for networks with multiple paths between nodes. Has 128 Kbytes of memory for buffering packets. Automatically recovers from power failure wh

• HP 10:10 LAN Bridge MB, Contents 1 Introducing the HP 10:10 LAN Bridge MB Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Front of the Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Back of the Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . .

• HP 10:10 LAN Bridge MB, RS-232-C port A serial interface connector on a computer or peripheral that adheres to the RS-232-C standard. The bridge console port adheres to this standard. spanning tree algorithm The IEEE 802.1 algorithm allowing the bridges and routers on a LAN to identify the best transmission path through the primary and backup bridges and routers on the LAN. station address A 12-digit hexadecimal number that identifies a specific network node and allows messages to be directed to that node only. These numbers are permanently coded in the circuitry of the hardware. Because the IEEE has assigned identifiers for each hardwa

• HP 10:10 LAN Bridge MB, Regulatory Statements FCC Statement (For U.S.A. Only) Federal Communications Commission Radio Frequency Interference Statement Warning: This equipment generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the instruction manual, it may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a

• HP 10:10 LAN Bridge MB, RS-232-C Modem Cable Minimum Pin-Out Modem end 25-pin male Bridge end 25-pin male Signal 22Tx 33Rx 44RTS 55CTS 66DSR 7 7 GND 8 8 CD OR DCD 20 20 DTR 22 22 RI 23 23 DRS – typically on V.24 (European) modems A-8 Cables and Connectors

• HP 10:10 LAN Bridge MB, 6 How the Bridge Works This chapter provides some reference information on how the HP 10:10 LAN Bridge MB functions and some other points of interest. These topics are covered: The bridging function Automatic network verification (why the bridge’s ports must be terminated for self-test to pass) Firmware enhancements Network management The Bridging Function When the HP 10:10 LAN Bridge MB receives a data packet on either of its two ports, it examines the packet to see if the node sending the packet (source node) is on the same LAN as the node for which the packet is intended (destination node). If the source and destination nodes a

• HP 10:10 LAN Bridge MB, Filtering on Vendor Code in the Destination Address: The first three bytes of the station address are consistent for a given vendor. For all Hewlett-Packard devices, for example, the first three bytes are 080009 (in hexadecimal). The destination address is the first field that is analyzed by the bridge in IEEE 802.3 and Ethernet packets, so the byte offset is 0. (The bridge strips off the Preamble and Start Frame Delimiter fields.) To use the vendor code in the destination address field to discard packets going to Hewlett-Packard devices, the wildcard filter to enter is: 0000-1000-0000-0000-0000-1001-XXXX-XXXX 0 No

• HP 10:10 LAN Bridge MB, COnfig Starts Config Mode for customizing the bridge configuration. (See “Config Mode Commands” later in this chapter.) DIsconnect Terminates the console session and resets the console port to automatically sense the console baud rate. If the console is connected to the bridge through modems, this command causes the modems to disconnect (hang up). PAssword Prompts you to enter or change the bridge access password. By default, there is no password. The password is used to prevent unauthorized access of the bridge from network management stations and through the bridge’s console interface. Once you set a password, you will be prompted for it each time you start

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