NBR-220, NBR-420, AND NBR-620 INSTALLATION GUIDE NBR-220 TWO PORT BRIDGE ® WITH LANVIEW PWR CPU RESET COM NBR-420 B MULTI PORT BRIDGE ROUTER RECEIVE TRANSMIT COLLISION STAND BY A PORT ® WITH LANVIEW PWR EPIM-A T1/FT1 PORT A SYNC LNK YEL STB DSR LNK TST RED SYN CTS TST PWR CPU DISPLAY RESET COM 2 NBR-620 PWR EPIM-A PORT B COM 1 B MULTI PORT BRIDGE ROUTER PORT F LANVIEW STY XMT LNK RCV BRIM-A100 PORT E RECEIVE TRANSMIT COLLISION STAND BY A PORT ® WITH BRIM-WT1 PWR EPI
NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made. The hardware, firmware, or software described in this manual is subject to change without notice.
Notice DOC NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.
Notice CABLETRON SOFTWARE PROGRAM LICENSE 1. LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject to the terms and conditions of this License Agreement. You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by Cabletron. 2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the Program. 3. APPLICABLE LAW.
Notice DECLARATION OF CONFORMITY Application of Council Directive(s): Manufacturer’s Name: Manufacturer’s Address: European Representative Name: European Representative Address: Conformance to Directive(s)/Product Standards: Equipment Type/Environment: 89/336/EEC 73/23/EEC Cabletron Systems, Inc. 35 Industrial Way PO Box 5005 Rochester, NH 03867 Mr. J.
CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual....................................................................... 1-2 1.2 NBR Features.............................................................................. 1-3 1.3 Conventions Used in This Document .......................................... 1-6 1.4 Related Manuals.......................................................................... 1-6 1.5 Getting Help.................................................................................
Contents CHAPTER 4 TROUBLESHOOTING 4.1 Using LANVIEW...........................................................................4-1 4.2 Troubleshooting Checklist............................................................4-4 4.3 Using the LCD..............................................................................4-6 4.3.1 Unsaved Initialization Messages .....................................4-7 4.3.2 Static System Messages .................................................4-7 4.3.3 Alarm Messages........
Contents APPENDIX D ADDITIONAL INFORMATION D.1 NBR Overview .............................................................................D-1 D.2 Ethernet Channels A, B, C, and D...............................................D-2 D.3 Channels E and F........................................................................D-2 D.4 Bridging Functionality ..................................................................
CHAPTER 1 INTRODUCTION The Cabletron Systems NBR-SERIES of Network Bridge Routers (NBR-220, NBR-420, NBR-620) provide bridging and routing solutions for Ethernet, token ring, FDDI, ATM, or wide area networks.
Chapter 1: Introduction This manual explains the following: • Installing the NBR • Connecting the NBR to an existing network • Testing the NBR • Troubleshooting any installation/operational problems In addition, Appendices contain NBR and Ethernet Port Interface Module (EPIM) environmental and operational specifications. This manual serves as a simple installation and troubleshooting reference guide for the NBR.
NBR Features Appendix A, NBR Specifications, provides the physical properties, environmental operating requirements, agency approvals, and power requirements. Appendix B, EPIM Specifications, details the specifications for the EPIMs that may be used with the NBR. Appendix C, Network Planning and Configuration, provides information on network cable requirements. Appendix D, Additional Information, provides an NBR overview and bridging functionality. 1.
Chapter 1: Introduction Bridging/Routing The NBR-420 and NBR-620 can support two optional Bridge/Router Interface Modules (BRIMs). These modules allow for additional Ethernet connections, Wide Area (Full or Fractional T1; 56k DDS) access, or links to existing high-speed network backbones such as Asynchronous Transfer Mode (ATM) or Fiber Distributed Data Interface (FDDI).
NBR Features MIB Navigation NBR firmware supports a management tool which allows for MIB navigation from a remote station. Refer to the NBR-220, NBR-420, and NBR-620 Local Management Guide for more information regarding MIB navigation. Spanning Tree Protocol Support The NBR supports the following spanning tree protocols: • 802.
Chapter 1: Introduction 1.3 CONVENTIONS USED IN THIS DOCUMENT The following conventions are used throughout this document: NOTE Note symbol. Calls the reader’s attention to any item of information that may be of special importance. Tip symbol. Conveys helpful hints concerning procedures or actions. TIP ! Caution symbol. Contains information essential to avoid damage to the equipment. CAUT ION Warning symbol. Warns against an action that could result in equipment damage, personal injury or death.
Getting Help 1.5 GETTING HELP If you need additional support related to this device, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support: By phone By CompuServe By Internet mail By FTP Login Password (603) 332-9400 Monday – Friday; 8 A.M. – 8 P.M. Eastern Time GO CTRON from any ! prompt support@ctron.com ctron.com (134.141.197.
CHAPTER 2 CONTROLS AND INDICATORS This chapter provides descriptions of the controls and indicators of the Network Bridge Routers (NBR-220, NBR-420, NBR-620).
Chapter 2: Controls and Indicators 2.1 LANVIEW LEDs The NBR-220, NBR-420, and NBR-620 incorporate the Cabletron Systems LANVIEW status monitoring and diagnostics system. LANVIEW LEDs help diagnose problems, such as a power failure or a cable fault. Each NBR includes the following LANVIEW LEDs: • A CPU LED, for board status • RECEIVE, TRANSMIT, COLLISION, and STAND BY LEDs for each Ethernet port • A PWR LED for power status 2.
CHAPTER 3 INSTALLATION This chapter contains the following procedures: • Unpacking the NBR • Preparing the NBR for installation • Installing the NBR • Connecting the NBR to the power source • Connecting the NBR to the network Only qualified personnel should perform installation procedures. 3.1 UNPACKING THE NBR Unpack the NBR as follows: 1. Remove the packing material covering the NBR. 2. Carefully remove the NBR from the shipping box. 3. Visually inspect the NBR.
Chapter 3: Installation 3.2 PREPARING THE NBR FOR INSTALLATION This section contains the following procedures: • Removing chassis cover • Setting mode switches • Setting NVRAM reset switch • Installing SIMM upgrades • Installing FLASH SIMMs • Installing LDRAM and SDRAM SIMMs • Adding/replacing EPIMs • Adding/replacing BRIMs • Testing the NBR 3.2.1 Removing Chassis Cover This section describes how to remove the chassis cover from the NBR.
Preparing the NBR for Installation To remove the chassis cover, perform the following steps (see Figure 3-1): 1. Disconnect the NBR from the network as follows: a. Disconnect the power cord from the rear of the NBR. b. Disconnect all network cables attached to the NBR. Note the ports to which these cables attach. 2. Use a Phillips-head screwdriver to remove the seven screws that attach the chassis cover to the NBR. Place the screws aside. Remove the chassis cover from the NBR.
Chapter 3: Installation FLASH LDRAM SDRAM BRIM (PORT F) BRIM (PORT E) NVRAM RESET SWITCH NBR FRONT PANEL MODE SWITCH BANK OFF ON 1 Cabletron Use Only 2 Cabletron Use Only 3 Cabletron Use Only 4 Cabletron Use Only 5 Baud Rate Default Switch (Off=9600, On=2400) 6 Forced Download Switch (This switch forces image file downloads.) 7 Cabletron Use Only 8 Password Default Switch (This switch clears passwords stored in NVRAM.
Preparing the NBR for Installation 3.2.2 Setting Mode Switches Never adjust switch settings while the NBR has power applied to it. Not only is this dangerous, but the change in position activates the switch function and after you reinstall or power cycle the NBR it will initiate the request. Figure 3-2 shows the location and factory default settings of the mode switches. Check these switches to ensure that they are in the correct position for normal NBR operation.
Chapter 3: Installation After changing the state of this switch, and repowering the device, the NBR requests a new image until it either receives a new image, or you reset the NBR again by using the RESET button on the front panel. After resetting the NBR, the device attempts to locate a BOOTP server again. However, the BOOTP request times out after about one minute, and the NBR boots from FLASH memory. • Switch 7 - Cabletron Systems use only.
Preparing the NBR for Installation 3.2.4 Installing SIMM Upgrades The NBR allows memory upgrades for FLASH Electrically Erasable Programmable Read only Memory (FLASH EEPROM), Shared Dynamic Random Access Memory (SDRAM), and Local Dynamic Random Access Memory (LDRAM). This section explains how to locate and add or replace a Single In-line Memory Module (SIMM) for any of these memory types. NOTE For additional information on SIMMs, contact Cabletron Systems Technical Support.
Chapter 3: Installation SIMM Slot Connector Teeth Clips 1 SIMM Slot Post 2 SIMM SIMM Hole 1092_08 Figure 3-3 Installing a FLASH SIMM Install a FLASH SIMM as follows: ! CAUTION The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR. 1. Insert the SIMM between the connector teeth in the SIMM slot. 2.
Preparing the NBR for Installation 3.2.4.2 Installing LDRAM and SDRAM SIMMs To install an LDRAM or SDRAM SIMM, see Figure 3-4 and the steps below. SIMM SIMM Hole Connector Teeth SIMM Slot Post SIMM Slot Connector Clip 1092_09 Figure 3-4 Installing an LDRAM or SDRAM SIMM Install an LDRAM or SDRAM SIMM as follows: ! CAUTION The components and boards associated with the NBR are sensitive to static discharges.
Chapter 3: Installation ! CAUTION The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR. Install an EPIM as follows: ! When removing an EPIM, make sure to pull the module straight out. Failure to do so could result in damage to the connector. CAUT ION 1. Remove the coverplate or the EPIM (whichever applies). 2.
Preparing the NBR for Installation 3.2.7 Testing the NBR Before installing the NBR in a live network, test the hub in a controlled situation to ensure that it is bridging packets. Perform this test with two workstations (see Figure 3-6), as follows: 1. Connect the first workstation to an NBR EPIM or BRIM. 2. Connect the second workstation to an NBR EPIM or BRIM. 3. Assign a valid IP address to the NBR using Local Management. 4.
Chapter 3: Installation NBR-620 MULTI PORT BRIDGE ROUTER ® WITH LANVIEW T1/FT1 SYNC LNK YEL STB DSR LNK TST RED SYN CTS TST BRIM-WT1 PORT F PWR XMT LNK RCV BRIM-A100 PWR EPIM-A PORT D STY PORT E PWR EPIM-A PORT C PWR EPIM-A PORT B EPIM-A PORT A 1092_11 Figure 3-6 Installation Check-out 3.3 INSTALLING THE NBR You can install the NBR on any horizontal surface.
Installing the NBR • If a shelving unit is to be used, it must be able to support 30 pounds (13.6 kg) of static weight. • The temperature for the selected location must be maintained between 5° and 40°C, and less than 10°C per hour temperature change. 3.3.1 Attaching the Strain-Relief Bracket Attach the strain-relief bracket to the front of the NBR as follows: 1. Remove the strain-relief bracket and four 8-32 x 3/8-inch screws from the NBR installation kit.
Chapter 3: Installation 3.3.2 Rack Mounting the NBR Install the NBR in a 19-inch rack as follows: 1. Remove four cover screws (two from each side) located along the front edges of each side of the NBR. See Figure 3-8. 2. Using the four 6-32 x 3/8-inch replacement flathead screws, attach the rack mounting brackets to each end of the NBR.
Connecting the NBR to the Power Source 3.3.3 Free-Standing Installation For a free-standing shelf or tabletop installation, locate the NBR within 7 feet of its power source and with an unrestricted free surface area 21 inches wide, 18 inches deep and 6 inches high, as shown in Figure 3-10. 21 IN. 18 IN. NBR-620 MULTI PORT BRIDGE ROUTER ® WITH LANVIEW PORT F PORT E 6 IN. PORT D Figure 3-10 PORT C PORT B PORT A 7 FT. Free-Standing Installation 3.
Chapter 3: Installation 2. Observe the status of the LANVIEW LEDs on the NBR. When the CPU LED is flashing, the STAND BY LEDs indicate the boot state of the NBR. During this period (up to 5 minutes), the LEDs cycle through a series of internal diagnostics. Figure 3-11 shows the LEDs.
Connecting the NBR to the Network 3.5 CONNECTING THE NBR TO THE NETWORK This section gives procedures for connecting the NBR to the network using the various EPIMs available. Once you have successfully powered up your NBR, you can add network connections. The procedure for connecting Ethernet segments to a hub varies depending on the media and ports you connect. Refer to the following list and perform the procedure described in the subsection(s) that apply to your hub: EPIM-T 3.5.1 EPIM-X 3.5.
Chapter 3: Installation Connect an EPIM-T to a Twisted Pair Segment as follows: 1. Connect the twisted pair segment to the module by inserting the RJ45 connector on the twisted pair segment into the RJ45 port on the module. See Figure 3-12. 2. Check that the LNK LED for the port is on. If the LED is not on, perform each of the following steps until it is: a. Check that the 10BASE-T device at the other end of the twisted pair segment is powered. b.
Connecting the NBR to the Network 3.5.2 Connecting an AUI Cable to an EPIM-X ! CAUTION The signal quality error (SQE) switch remains in the OFF position for most network connections. However, some Data Terminal Equipment (DTE) requires SQE. Refer to your DTE manual for SQE requirement information. Connect an EPIM-X to a device not requiring SQE as follows: 1. Check that the SQE LED on the EPIM-X is OFF. If the SQE LED is ON, check the position of the SQE switch.
Chapter 3: Installation 3.5.3 Connecting a Fiber Optic Cable to an EPIM-F1/F2 or EPIM-F3 When connecting a fiber optic link segment to an EPIM-F1/F2 or EPIM-F3 keep the following in mind: ! A full alignment sleeve damages the receive port. SMA 905 connectors do not need alignment sleeves. CAUT ION • When connecting a fiber optic link segment with SMA 906 connectors to an EPIM-F1 with SMA ports, make sure each connector uses half alignment, NOT full alignment sleeves.
Connecting the NBR to the Network ! CAUTION Do not touch the ends of the fiber optic strands, and do not let the ends come in contact with dust, dirt, or other contaminants. Contamination of cable ends causes problems in data transmissions. If necessary, clean contaminated cable ends using alcohol and a soft, clean, lint-free cloth. Connect a fiber optic link segment to an EPIM-F1/F2 or an EPIM-F3 as follows: 1.
Chapter 3: Installation 3. Attach the fiber labeled 2 to the applicable transmit port labeled TX, on the module. 4. At the other end of the fiber optic cable, attach the fiber labeled 1 to the transmit port of the device. 5. Attach the fiber labeled 2 to the receive port. 6. Check that the LNK LED on the applicable module port is on. If the LED is not on, perform each of the following steps until it is: a. Check that the device at the other end of the link is on. b.
Connecting the NBR to the Network b. Attach the thin-net segment to one (1) of the female connectors on the tee-connector. ! Failure to terminate each tee-connector segment may result in improper segment operation. CAUTION c. Attach another thin-coax segment or a terminator to the other female connector on the tee-connector. When internal termination switch is set to off ( ): Connect BNC tee-connector to port. Attach a terminator or terminated thin-net segment to one female connector of tee-connector.
Chapter 3: Installation Connect an EPIM-A to an external network segment as follows: 1. Check that the PWR LED on the EPIM-A is on. If the PWR LED is off, contact Cabletron Systems Technical Support. 2. Attach an external transceiver to the network segment intended for AUI port connection. For additional information, refer to the applicable transceiver manual. 3. Attach an AUI cable, no longer than 50 meters in length, to the transceiver you connected to the network in Step 2. 4.
CHAPTER 4 TROUBLESHOOTING This chapter provides information for troubleshooting network and NBR operational problems. The following sections describe the LANVIEW LEDs, provide a troubleshooting checklist, and explain how to use the LCD and the RESET button. 4.1 USING LANVIEW The NBR uses the Cabletron Systems built-in visual diagnostic and status monitoring system called LANVIEW. With LANVIEW, you can quickly scan the LEDs to observe network status or diagnose network problems.
Chapter 4: Troubleshooting Table 4-1 LANVIEW LEDs LED Color Description Error Condition/ Recommended Action PWR Green Indicates that the NBR is receiving power. If OFF, check the input power source (circuit breaker, fuse, etc.). CPU MultiColor Flashing Green, indicates that the NBR is operating properly. If OFF, Red, or Yellow the board has a problem. Light flashes to indicate that a segment is receiving a frame.
Using LANVIEW Table 4-1 LANVIEW LEDs (Continued) LED Color Description COLLISION A, B, C, D Red Collision detected on a segment. When the LAN is operating properly, occasional flashing is normal. Error Condition/ Recommended Action Excessive flashing, or a solid light, indicates an inordinate number of collisions. This may be normal if there is a high amount of traffic. Ensure that the SQE test is disabled for any transceiver connected to the external channels (A, B, C, or D) of the NBR.
Chapter 4: Troubleshooting 4.2 TROUBLESHOOTING CHECKLIST If your NBR is not operating properly, the following checklist describes some of the problems that may occur, possible causes for the problem, and suggestions for resolving the problem. Table 4-2 Troubleshooting Checklist Recommended Action Problem Possible Causes No LEDs on. Loss of Power. Check that the NBR has adequate power. NBR not properly installed. Verify proper installation, and check to see that the PWR LED is green.
Troubleshooting Checklist Table 4-2 Troubleshooting Checklist (Continued) Recommended Action Problem Possible Causes User parameters (IP address, Device and Module name, etc.) are lost when device is powered down. NVRAM reset switch has been toggled and user-entered parameters have been reset to factory default. See Chapter 3 for proper use of the NVRAM switch. NVRAM may be defective. If NVRAM is defective, call Cabletron Systems Technical Support. AUI cable may be defective. Replace AUI cable.
Chapter 4: Troubleshooting 4.3 USING THE LCD The NBR-420 and NBR-620 are equipped with a front panel LCD as shown in Figure 4-2. The LCD provides network statistics and diagnostic information such as Power up diagnostics, Revision levels, MAC and IP Addresses, and Error Alerts.
Using the LCD 4.3.1 Unsaved Initialization Messages Unsaved Initialization messages are generated during power-up and appear as the event occurs. These messages track the boot up sequence. They are not saved and cannot be recalled. Cabletron Hardware Init Cabletron Boot From Flash Cabletron BOOTP Discovery Cabletron RARP Req. State Cabletron TFTP Req.
Chapter 4: Troubleshooting To Exit There are three ways to exit the Static System messages: • From the last Static System message Momentarily press the DISPLAY button while the last message “COM 2 Port Function xxxxx” is displayed. The display automatically returns to the product name. • Automatic 20-second exit Allow 20 seconds to elapse after the last DISPLAY button operation. The display returns to the product name. • Jump to Alarm messages Press and hold the DISPLAY button for 3 seconds.
Using the LCD 4.3.3 Alarm Messages Alarm messages pertain to events that occur within the NBR. The messages that can be displayed are shown in this section. NOTE Whether you are displaying Static System messages, Alarm messages, or Saved System messages, the display returns to the product name display 20 seconds after the last operation of the DISPLAY button.
Chapter 4: Troubleshooting Displayed Messages Comments Port xxxxxx Link Established Displays the link status of ports A, B, C, D, E, or F. Port xxxxxx Not Linked Displays the link status of ports A, B, C, D, E, or F. Network/Port x EPIM Inserted Displays installation status of ports A, B, C, or D. Network/Port x EPIM Removed Displays installation status of ports A, B, C, or D Bridge Port x Stand By Indicates Bridge port A, B, C, or D in Stand By mode.
Using the LCD • From the product name display Press and hold the DISPLAY button for 3 seconds while the product name is displayed. When the button is released, the display steps to the Alarm messages. Then press and hold the DISPLAY button for another 3 seconds. When the button is released, the display steps to the first Saved System message. Thereafter, each time you press the DISPLAY button, the next Saved System message is displayed.
Chapter 4: Troubleshooting 4.3.5 Failure or Error Messages Failure or Error Messages appear when an unrecoverable condition occurs. These messages are not saved and cannot be recalled by using the DISLAY button. When one of these messages appear call Cabletron Systems Technical Support. The Failure or Error messages are as follows: Cabletron Ctrl. Reg. Err.
APPENDIX A NBR SPECIFICATIONS This appendix provides the operating specifications for the Cabletron Systems NBR. Cabletron Systems reserves the right to change these specifications at any time without notice. A.
Appendix A: NBR Specifications A.
Physical Properties A.3 PHYSICAL PROPERTIES Dimensions: 7.2H x 43.6W x 34.6D (cm) 2.8H x 17W x 13.5D (in) 3.18 kg (7 lbs) Weight (unit): A.4 ENVIRONMENTAL REQUIREMENTS Operating Temperature: 5° to 40°C (41° to 104°F) Non-operating Temperature: -30° to 90°C (-22° to 194°F) Operating Humidity: 5% to 95% (non-condensing) A.5 CERTIFICATION Safety: Emission: Immunity: UL 1950, CSA C22.2 No. 950, EN 60950, and IEC 950 FCC Part 15 Class A, VCCI Class 1, and EN 55022 Class A EN 50082-1 A.
APPENDIX B EPIM SPECIFICATIONS B.1 EPIM SPECIFICATIONS EPIMs enable the connection of the NBR to different media types. Cabletron Systems offers a variety of EPIMs. The following sections explain specifications for each EPIM. B.2 EPIM-T The EPIM-T is an RJ45 connector supporting UTP cabling. It has an internal Cabletron Systems TPT-T 10BASE-T Twisted Pair Transceiver. The slide switch on the EPIM-T determines the cross-over status of the cable pairs.
Appendix B: EPIM Specifications B.3 EPIM-F1/F2 The EPIM-F1 and EPIM-F2 shown in Figure B-2 support Multimode Fiber Optic cabling. Each EPIM has an internal Cabletron Systems FOT-F Fiber Optic Transceiver. The EPIM-F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST Connectors. Specifications for the EPIMs are listed below. 1092_22 Figure B-2 EPIM-F1 and EPIM-F2 Typical Value Worst Case Worst Case Budget Typical Budget Receive Sensitivity -30.5 dBm -28.
EPIM-F3 B.4 EPIM-F3 The EPIM-F3 shown in Figure B-3 supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is equipped with ST Connectors. Specifications for the EPIM-F3 are listed below. 1092_23 Figure B-3 EPIM-F3 Transmitter Power decreases as temperatures rise and increases as temperatures fall. Use the Output Power Coefficient to calculate increased or decreased power output for the operating environment.
Appendix B: EPIM Specifications Parameter Typical Minimum Maximum Transmitter Peak Wave Length 1300 nm 1270 nm 1330 nm Spectral Width 60 nm - Rise Time 3.0 ns 2.7 ns 5.0 ns Fall Time 2.5 ns 2.2 ns 5.0 ns Duty Cycle 50.1% 49.6% 50.7% Bit Error Rate Better than 10-10 100 nm The transmitter power levels given above are Peak Power Levels after optical overshoot. Use a Peak Power Meter to compare the values given above to those measured on any particular port.
EPIM-C B.5 EPIM-C The EPIM-C supports thin coaxial cabling and is equipped with an internal Cabletron Systems TMS-3 Transceiver. Use the TERM switch on the front of the EPIM-C to set the internal 50 Ohm terminator. This eliminates the need to connect the port to a T-connector and terminator. Figure B-1 shows the setting for the terminator switch. .
Appendix B: EPIM Specifications B.6 EPIM-A AND EPIM-X The EPIM-A is a DB15 female connector used to attach segments to an external transceiver. The EPIM-X is equipped with dual internal transceivers. It has a DB15 male connector used to attach segments to an AUI cable. Figure B-5 shows both modules. 1092_25 Figure B-5 EPIM-A and EPIM-X, AUI Port Table B-1 DB15 Pinouts 1 Logic Ref. 9 Collision 2 Collision + 10 Transmit 3 Transmit + 11 Logic Ref. 4 Logic Ref.
APPENDIX C NETWORK PLANNING AND CONFIGURATION This appendix contains general networking guidelines. Before attempting to install the NBR or any additional EPIMs or BRIMs, review the requirements and specifications outlined in this appendix. ! CAUT ION Your network installation must meet the conditions, guidelines, specifications, and requirements included in this appendix to ensure satisfactory performance of this equipment. Failure to follow these guidelines may produce poor network performance. C.
Appendix C: Network Planning and Configuration NOTE Losses introduced by connections at punch-down blocks and other equipment reduce total segment length. For each connector or patch panel in the link, subtract 12 meters from the total length of your cable. • Insertion Loss - Between frequencies of 5.0 and 10.0 MHz, the maximum insertion loss must not exceed 11.5 dB.
Network Cable Requirements • Temperature - Multi-pair PVC 24 AWG telephone cables typically have an attenuation of approximately 8-10 dB/100 m at 20°C (68°F). The attenuation of PVC insulated cable varies significantly with temperature. At temperatures greater than 40°C (104°F), we strongly recommend using plenum-rated cable to ensure attenuation remains within specification. C.1.
Appendix C: Network Planning and Configuration - • Network propagation delay is the amount of time it takes a packet to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network must not exceed 25.6 µs in one direction (51.2 µs round trip). If the total propagation delay between any two nodes on the network exceeds 25.6 µs, you must use bridges. Length - The maximum possible multimode fiber optic cable length is 2 km (2187.2 yards). However, IEEE 802.
Network Cable Requirements - • Network propagation delay is the amount of time it takes a packet to travel from the sending device to the receiving device. Total propagation delay for the entire network must not exceed 25.6 µs in one direction (51.2 µs round trip). If the total propagation delay exceeds 25.6 µs, you must use bridges. Length - If you meet all system budgets, the maximum single mode fiber optic cable length can reach 5 km (3.1 miles) with bridges at each segment end. However, IEEE 802.
Appendix C: Network Planning and Configuration C.2 TRANSCEIVER REQUIREMENTS When you connect an external network segment to an EPIM-A in your hub through a transceiver, that transceiver must meet IEEE 802.3 standards or Ethernet version 1.0 or 2.0 requirements. The transceiver must also have SQE disabled. C.3 THE NBR AS A MULTIPORT ROUTER An NBR routing image allows you to set up the module as a multi-port router.
APPENDIX D ADDITIONAL INFORMATION D.1 NBR OVERVIEW The NBR provides bridging and management for up to four separate Ethernet channels (A, B, C, and D).
Appendix D: Additional Information Since the NBR is SNMP compliant, you can control and monitor the device remotely and locally using different SNMP Network Management packages. NBR firmware also supports DLM and all RMON groups, including: • Alarms • Hosts Top N • Events • Matrix • History • Statistics • Hosts • Filter • Packet capture D.2 ETHERNET CHANNELS A, B, C, AND D The NBR manages all Ethernet bridging traffic within its resident hub.
Bridging Functionality D.4 BRIDGING FUNCTIONALITY The NBR automatically configures itself as a bridge between channels A, B, C, D, E, and F for a six port bridge maximum. The IEEE 802.1d compliant bridge function supports multi-port bridging, the IETF Bridge MIB, Special Filtering Database, and Spanning Tree protocol. The NBR incorporates IEEE 802.1d or DEC Spanning Tree Algorithms (user selectable), allowing bridges in parallel between segments as backup paths for fault tolerance.
INDEX C Certification A-3 COM port pinouts A-2 E Environmental requirements A-3 H Help 1-7 L LANVIEW LEDs 1-3, 2-2 LCD 1-3, 2-2, 4-6 N NBR connecting to the network 3-17 features 1-3 installation 3-1 overview D-1 Network cable requirements C-1 connection 3-17 operating specifications A-1 transceiver requirements C-6 NVRAM reset switch 3-6 P Power supply requirements A-3 R Related material 1-6 RESET button 1-3, 2-2, 4-12 T Technical Support 1-7 NBR-SERIES Installation Guide Index-1
POWER SUPPLY CORD The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application. GERMAN: Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.
