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Cabletron Systems BRIM-F6 User Manual

Fddi bridge/ router interface module
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BRIM-F6
USER'S GUIDE

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Summary of Contents for Cabletron Systems BRIM-F6

  • Page 1 BRIM-F6 USER’S GUIDE...

  • Page 3: Table Of Contents

    Unpacking the BRIM and the FPIM ... 2-1 Installing FPIMs ... 2-2 Installing the BRIM-F6 ... 2-3 2.3.1 Installing a BRIM-F6 into a MIM ... 2-4 2.3.2 Installing a BRIM-F6 into a Hub... 2-7 CHAPTER 3 USING LANVIEW ... 3-1 CHAPTER 4 SPECIFICATIONS...

  • Page 5: Chapter 1 Introduction

    Welcome to the Cabletron Systems BRIM-F6 User’s Guide. This manual describes features, explains installation procedures, and provides specifications for the BRIM-F6 — Cabletron Systems FDDI Bridge/ Router Interface Module (BRIM). The BRIM-F6 resides in, and provides additional connectivity/ functionality to, various Cabletron MIMs and hubs (e.g., the EMM-E6, ESXMIM, NBR-420/620 or MicroMMAC).

  • Page 6: Using This Manual

    Appendix A, Basic FDDI Networks, covers basic concepts of FDDI networks, FDDI devices, and design/installation considerations. 1.2 Getting Help If you need additional support related to the BRIM-F6, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support: By phone ...(603) 332-9400...

  • Page 7: Brim-F6 Overview

    1.4 BRIM-F6 Features Connectivity The BRIM-F6 is equipped with slots for FDDI A and B ports. These two ports allow connection to the ring as a Dual Attached Station (DAS) using two FPIMs or as a Single Attached Station (SAS) using one FPIM.

  • Page 8: Related Documentation

    CHAPTER 1: INTRODUCTION LANVIEW Diagnostic LEDs The BRIM-F6’s front panel LEDs help you diagnose Bridge, Port, and Network status. 1.5 Related Documentation Use the following documentation to supplement the procedures, and other technical data in this manual. This manual may reference procedures in these documents, where appropriate, but does not repeat them.

  • Page 9: Chapter 2 Installation

    This chapter contains instructions for unpacking the BRIM-F6, installing FPIMs, and installing the BRIM-F6 into Cabletron devices that support BRIM technology. Note: The BRIM-F6 is not shipped with the FPIMs installed. You must order the correct FDDI Port Interface Modules based upon your network requirements.
  • Page 10 CHAPTER 2: INSTALLATION 2.2 Installing the FPIMs To install an FPIM into the BRIM-F6: 1. Remove the screws securing the FPIM coverplate and the coverplate. See Figure 2-1. 2. Insert the connector pins of the FPIM into the connector on the BRIM-F6.

  • Page 11: Installing Fpims

    FPIM Connector 2.3 Installing the BRIM-F6 This section contains procedures on how to install a BRIM-F6 to upgrade or change the capabilities of a device’s motherboard. Note: Cabletron provides disposable wrist straps and faceplate and standoff screws in both the BRIM package and on devices that support BRIM technology.

  • Page 12: Installing A Brim-F6 Into A Mim

    CHAPTER 2: INSTALLATION 2.3.1 Installing a BRIM-F6 into a MIM To install a BRIM-F6 in a Media Interface Module (MIM) that supports BRIM technology (e.g., EMM-E6): Note: We recommend that you power down your hub even though Cabletron MIMs have “hot swap” capabilities.
  • Page 13 BRIM Motherboard Connector Figure 2-3. Installing the BRIM-F6 The BRIM-F6 requires a special 24 pin ribbon connector in addition to the standard 96 pin BRIM connector. This ribbon connector allows the BRIM-F6 to use in-line filtering functionality. BRIM-F6 User’s Guide...
  • Page 14 Ribbon Cable Connector Figure 2-4. Installing the BRIM-F6 Ribbon Cable Caution: The ribbon cable connector only fits into the ribbon cable jack one way. Fit the tab on the connector into the groove in the jack for correct cable orientation.

  • Page 15: Installing A Brim-F6 Into A Hub

    Note: The BRIM-F6 requires an additional 24 pin ribbon connection. Hubs that support BRIM technology only provide one BRIM slot that supports this connection. Make sure you install the BRIM-F6 in the BRIM slot with the ribbon cable jack. 5. Remove BRIM standoff screws.
  • Page 16 Note: Faceplate and support post screws are provided both on the hub and in the BRIM package. The BRIM-F6 requires a special 24 pin ribbon connector in addition to the standard 96 pin BRIM connector. This ribbon connector allows the BRIM-F6 to use in-line filtering functionality.

  • Page 17: Chapter 3 Using Lanview

    LANVIEW is a visual diagnostic and status monitoring system developed by Cabletron Systems. LANVIEW LEDs (see Figure 3-1) help you troubleshoot Bridge, Port, and Network problems. The following sections describe BRIM-F6 LEDs. FPIM B Figure 3-1. BRIM-F6 LANVIEW LEDs PWR (Power) When ON, this Green LED indicates that power is supplied to the BRIM.
  • Page 18 (Appendix A summarizes FDDI connection rules.) WRP (Wrap) This Red LED is ON when the BRIM-F6 detects an FDDI ring wrap. This means there is a break in the ring, and the system has combined the primary and secondary rings into one ring.

  • Page 19: Chapter 4 Specifications

    This chapter lists the operating specifications for the BRIM-F6. Cabletron Systems reserves the right to change these specifications at any time, without notice. 4.1 Fiber Optic Interface Depending on the FPIM, interfaces have the following characteristics: Multimode Specifications Optical wavelength:...
  • Page 20 -36.0 dBm typical -45.0 dBm minimum 10 sec typical 350 sec maximum 1.5 dB minimum Single Mode Transmitter 1330 nm typical -20.0 dBm minimum -14.0 dBm maximum 3.5 nsec maximum 3.5 nsec maximum 150 nm maximum 150 mAmps maximum BRIM-F6 User’s Guide...
  • Page 21 Supply current: Single Mode Receiver (Signal Detect) Assert power: Assert time: Deassert power: Deassert time: Hysteresis: BRIM-F6 User’s Guide Single Mode Specifications Single Mode Receiver 1330 nm typical -31.0 dBm minimum -14.0 dBm maximum 3 nsec maximum 3 nsec maximum 115 mAmps maximum -33.0 dBm typical...
  • Page 22 Assert time Page 4-4 1.080 Vpk maximum 0.920 Vpk minimum 2 nsec minimum 4 nsec maximum 2 nsec minimum 4 nsec maximum 0.5 nsec maximum 5% maximum 3% maximum (Signal Detect) 10 sec typical 100 sec maximum BRIM-F6 User’s Guide...

  • Page 23: Cable Specifications

    The FDDI Physical Layer Medium Dependent (PMD), Twisted Pair Physical Layer Medium Dependent (TP-PMD), and Single Mode Fiber Physical Layer Medium Dependent (SMF-PMD) ANSI standards define cable requirements as follows: BRIM-F6 User’s Guide (Signal Detect) 10 sec typical 350 sec maximum 1.285 Vpk maximum...
  • Page 24 100 km (62 miles) — dual ring 200 km (124 miles) — wrapped 2 km (1.2 miles) 100 km (62 miles) — dual ring 200 km (124 miles) — wrapped 40 km (24 miles) maximum 25 km (15 miles) typical BRIM-F6 User’s Guide...

  • Page 25: Twisted Pair Pinout Configuration

    Note: When connecting two twisted pair ports together, a transmit and receive cross-over must occur between the two devices (within the cable). Figure 4-1. RJ-45 TP-PMD Port BRIM-F6 User’s Guide 100 km (62 miles) — dual ring 200 km (124 miles) — wrapped 100 m (328.1 feet)

  • Page 26: Environment

    Page 4-8 Contact Signal Receive + Receive - -40 C minimum 85 C maximum 5 C minimum 40 C maximum 5% to 95% non-condensing BRIM-F6 User’s Guide...

  • Page 27: Appendix A Basic Fddi Networks

    (frames) and then passes (transmits) the token on to the next active station on the ring. BRIM-F6 User’s Guide APPENDIX A Page A-1...
  • Page 28 DAC out to each of the attached SASs, creating a Ring of Trees topology. The DAC controls main ring access to the attached SASs, restoring the continuity of the ring whenever an SAS fails, becomes disconnected, or is turned-off. Page A-2 BRIM-F6 User’s Guide...

  • Page 29: Reliability

    (a trunk cable breaks). Figure A-2 illustrates how the open ends of the primary ring wrap into the secondary ring, restoring continuity by creating a new ring. BRIM-F6 User’s Guide Ethernet/802.3 Network...

  • Page 30: Ansi Standard X3T9.5

    FDDI station architecture and its operation. The X3T9.5 entities perform many of the lower layer functions of the OSI network model Data Link and Physical Layers (Figure A-3). Page A-4 SECONDARY RING CONCENTRATOR 1 WRAP CONCENTRATOR 4 BRIM-F6 User’s Guide...
  • Page 31 4-bit MAC symbol as a 5-bit symbol for transmission. This encoding occurs to ensure each symbol has at least two bit transitions for bit-cell synchronization at the remote receiver. Decoding reverses this process for the received frames. BRIM-F6 User’s Guide ANSI Standard X3T9.5 Data Link Media Access Control •...
  • Page 32 Frame Check Sequence Coverage Destination Address Source Address Information 4 or 12 Symbols 4 or 12 Symbols 0 Symbol Pairs Maximum - 9000 Symbols Frame Check Ending Frame Status Sequence Delimiter 3 Symbols 8 Symbols 1 Symbols BRIM-F6 User’s Guide...
  • Page 33 SMT Frame Services generates and interprets special FDDI frames that assist in network control and monitoring. Ring Management (RMT) monitors status information from the MAC and Configuration Management and controls several functions relating to the health of the ring. BRIM-F6 User’s Guide FDDI STATION SMT Frame Services Ring Management...

  • Page 34: Fddi Connection Rules

    Connecting A and B to M ports creates a dual homing configuration. Dual homing provides a redundant topology for concentrators. Figure A-6 illustrates how to configure three concentrators into dual homing configuration. Page A-8 BRIM-F6 User’s Guide...

  • Page 35: A.6 Fddi Devices

    (see Figure A-7). All stations must have: • one SMT • at least one MAC • one PMD • one PHY. BRIM-F6 User’s Guide Port B Port A Port B FDDI Devices Port A Port B Port M Port M Primary...
  • Page 36 Figure A-7. Valid Station Configurations Page A-10 PMD-1 PHY-1 PHY-A PMD-A Secondary Primary PHY-A PMD-A Secondary Primary Dual Attached Concentrator PMD-3 PMD-2 PMD-1 PHY-3 PHY-2 PHY-1 PHY-B PMD-B Secondary Primary PHY-B PMD-B Dual Attached Station Secondary Primary BRIM-F6 User’s Guide...

  • Page 37: Fddi Devices

    Dual Attachment DUAL ATTACHMENT SECONDARY IN Single SINGLE ATTACHMENT Attachment Figure A-8. Duplex Fiber Optic Receptacles and Connectors BRIM-F6 User’s Guide SECONDARY OUT TYPE A PRIMARY OUT TYPE B TYPE M TYPE S FDDI Devices FDDI CONNECTORS Type A Type B...
  • Page 38 These devices, often electrically actuated, provide passive optical switching of both the primary and secondary ring cables. Figure A-9 shows the data paths through the switch in both the bypass and operational (non-bypassed) states. Page A-12 BRIM-F6 User’s Guide...
  • Page 39 FDDI protocol, restoring the original frame. The bridge maintains routing information for filtering (prevent frames from crossing the bridge) or forwarding messages across the bridge. BRIM-F6 User’s Guide FDDI Devices OPERATIONAL STATE Station Power On...

  • Page 40: Design Considerations For Fddi Networks

    fiber path length of 200 km. Page A-14 Single Attached Stations FDDI FDDI FDDI BRIDGE Single Attached Stations Figure A-10. FDDI Devices File Server DUAL ATTACHED CONCENTRATOR DUAL FDDI ATTACHED NETWORK STATION DUAL ATTACHED CONCENTRATOR SINGLE ATTACHED CONCENTRATOR BRIM-F6 User’s Guide...

  • Page 41: Drive Distance

    The maximum attenuation (attenuation budget) between any two active connections to the ring, according to the FDDI standard, is 11 dB. This budget includes the attenuation of the cabling, splices, connections, and optical bypass switches. BRIM-F6 User’s Guide Page A-15...

  • Page 42: Bandwidth

    SAC to the DAC, you must count two connections against the budget, one for the concentrator port and one for the attached device. This same logic applies to counting connections for a SAC. The multiple ports of the concentrator do not count until you attach a device. Page A-16 BRIM-F6 User’s Guide...
  • Page 43 Design Considerations For FDDI Networks 16 PHYSICAL CONNECTIONS Figure A-11. Physical Device Connections BRIM-F6 User’s Guide Page A-17...

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