BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM BRIM-F6 USER’S GUIDE
BRIM-F Book Page vii Monday, January 29, 1996 9:26 AM CONTENTS CHAPTER 1 1.1 1.2 1.3 1.4 1.5 Using This Manual ....................................................................... 1-2 Getting Help................................................................................. 1-2 BRIM-F6 Overview ...................................................................... 1-3 BRIM-F6 Features ....................................................................... 1-3 Related Documentation ..................
BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM 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).
BRIM-F Book Page 2 Monday, January 29, 1996 9:26 AM CHAPTER 1: INTRODUCTION 1.1 Using This Manual Read through this manual completely to familiarize yourself with its content and to gain an understanding of the features and capabilities of the BRIM-F6. In addition to having a general working knowledge of Ethernet and IEEE 802.3 type data communications networks and their physical layer components, you should also understand FDDI networks and the ANSI X3T9.5 standard prior to installing the BRIM-F6.
BRIM-F Book Page 3 Monday, January 29, 1996 9:26 AM BRIM-F6 Overview 1.3 BRIM-F6 Overview The BRIM-F6 is an FDDI Bridge Router Interface Module (BRIM) developed for use in Cabletron’s MMAC-FNB and MicroMMAC. The BRIM-F6 can be used to provide a high-speed uplink from lower speed networks such as Ethernet to a 100 Mbps FDDI backbone. 1.4 BRIM-F6 Features Connectivity The BRIM-F6 is equipped with slots for FDDI A and B ports.
BRIM-F Book Page 4 Monday, January 29, 1996 9:26 AM 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.
BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM 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.
BRIM-F Book Page 2 Monday, January 29, 1996 9:26 AM 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. See Figure 2-2.
BRIM-F Book Page 3 Monday, January 29, 1996 9:26 AM Installing the BRIM-F6 FPIM Screws FPIM Connector Standoffs -F6 IM 6 S BR IM-FV ST S BRT RC V ST IM D E RV OR F SE RE FP XM RC R T PW XM R K PW LN R K LN TW P R R W TW P K LN WR K LN IM FP R IM FO FP R ED RV D FO SE E RE ERV S E A R IM FP A IM FP B IM FP B IM FP Figure 2-2. Installing FPIMs 2.
BRIM-F Book Page 4 Monday, January 29, 1996 9:26 AM 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. 1. Power-down your MMAC hub. 2. Disconnect all cables from the module. Note each connection. 3. Unscrew the top and bottom knurled knobs of the MIM face plate. 4.
BRIM-F Book Page 5 Monday, January 29, 1996 9:26 AM Installing the BRIM-F6 Standoff Screw BR V T WR Standoff -F6 IM Connector Pins Under BRIM S ST RC IM A FP XM P K R P K WR LN TW LN IM B FP Coverplate/ Faceplate Screws 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-F Book Page 6 Monday, January 29, 1996 9:26 AM CHAPTER 2: INSTALLATION To install the BRIM-F6 ribbon cable: 1. Insert one ribbon cable connector into the ribbon cable jack on the BRIM. (See Figure 2-4.) Tab Ribbon Cable Connector Groove S ST P R WR TW V T RC XM Ribbon Cable Jack Figure 2-4. Installing the BRIM-F6 Ribbon Cable Caution: The ribbon cable connector only fits into the ribbon cable jack one way.
BRIM-F Book Page 7 Monday, January 29, 1996 9:26 AM Installing the BRIM-F6 3. Insert the remaining ribbon cable connector into the ribbon cable jack on the MIM. 4. Press down on the connector until the clips on the jack snap into a vertical locked position. After returning the MIM to the chassis, returning power to your hub, and reconnecting to the network, the BRIM-F6 is now ready for operation. 2.3.
BRIM-F Book Page 8 Monday, January 29, 1996 9:26 AM CHAPTER 2: INSTALLATION 9. Press down firmly on the back of the BRIM until the pins slide all the way into the connector holes. Note: Make sure that the standoffs align with the standoff screw holes. 10. Reinstall the coverplate/faceplate screws and standoff screws. Note: Faceplate and support post screws are provided both on the hub and in the BRIM package.
BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM 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. BRIM-F6 PWR XMT RCV STS FPIM B FPIM A LNK WRP TWR LNK Figure 3-1. BRIM-F6 LANVIEW LEDs PWR (Power) When ON, this Green LED indicates that power is supplied to the BRIM.
BRIM-F Book Page 2 Monday, January 29, 1996 9:26 AM CHAPTER 3: USING LANVIEW TWR (Twisted Ring) When ON, this Red LED indicates an undesirable cable connection. TWR illuminates when you connect A to A, or B to B, instead of A to B, or B to A. The BRIM-F6 supports undesirable configurations, but alerts you to them. (Appendix A summarizes FDDI connection rules.) WRP (Wrap) This Red LED is ON when the BRIM-F6 detects an FDDI ring wrap.
BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM 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 Multimode Transmitter Optical wavelength: 1330 nm typical Optical output: -20.0 dBm minimum -14.0 dBm maximum Optical rise time: 3.
BRIM-F Book Page 2 Monday, January 29, 1996 9:26 AM CHAPTER 4: SPECIFICATIONS Multimode Receiver (Signal Detect) Assert power: -33.0 dBm typical -31.0 dBm maximum Assert time: 10 µsec typical 100 µsec maximum Deassert power: -36.0 dBm typical -45.0 dBm minimum Deassert time: 10 µsec typical 350 µsec maximum Hysteresis: 1.5 dB minimum Single Mode Specifications Single Mode Transmitter Page 4-2 Optical wavelength: 1330 nm typical Optical output: -20.0 dBm minimum -14.
BRIM-F Book Page 3 Monday, January 29, 1996 9:26 AM Single Mode Specifications Single Mode Receiver Optical wavelength: 1330 nm typical Optical input: (avg. sensitivity) -31.0 dBm minimum -14.0 dBm maximum Output rise time: 3 nsec maximum Output fall time: 3 nsec maximum Supply current: 115 mAmps maximum Single Mode Receiver (Signal Detect) Assert power: -33.0 dBm typical -31.0 dBm maximum Assert time: 10 µsec typical 100 µsec maximum Deassert power: -36.0 dBm typical -45.
BRIM-F Book Page 4 Monday, January 29, 1996 9:26 AM CHAPTER 4: SPECIFICATIONS Unshielded Twisted Pair Specifications Unshielded Twisted Pair Transmitter Amplitude 1.080 Vpk maximum 0.920 Vpk minimum Rise time 2 nsec minimum 4 nsec maximum Fall time 2 nsec minimum 4 nsec maximum Rise/Fall variation 0.
BRIM-F Book Page 5 Monday, January 29, 1996 9:26 AM Shielded Twisted Pair Transmitter Specifications Unshielded Twisted Pair Receiver (Signal Detect) Deassert time 10 µsec typical 350 µsec maximum Shielded Twisted Pair Transmitter Specifications Shielded Twisted Pair Transmitter Amplitude 1.285 Vpk maximum 1.165 Vpk minimum Rise time 3 nsec minimum 5 nsec maximum Fall time 3 nsec minimum 5 nsec maximum Rise/Fall variation 0.
BRIM-F Book Page 6 Monday, January 29, 1996 9:26 AM CHAPTER 4: SPECIFICATIONS Multimode Fiber: Core diameter: 62.5 µm nominal Cladding diameter: 128.0 µm maximum 122.0 µm minimum Cable attenuation: ≤ 2.5 dB/km typical Single Mode Fiber: Core diameter: 8.7 µm +/- 0.5 µm Cladding diameter: 127.0 µm maximum Cable attenuation: ≤ 0.
BRIM-F Book Page 7 Monday, January 29, 1996 9:26 AM Twisted Pair Cable Length Maximum total cable length: 100 km (62 miles) — dual ring 200 km (124 miles) — wrapped Maximum twisted pair cable length between adjacent nodes: 4.3 100 m (328.1 feet) Twisted Pair Pinout Configuration This section provides the RJ-45 pinout configuration for Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP) Physical Layer Medium Dependent (PMD) ports.
BRIM-F Book Page 8 Monday, January 29, 1996 9:26 AM CHAPTER 4: SPECIFICATIONS Contact 4.4 4.5 Signal 6 N/A 7 Receive + 8 Receive - Environment Storage temperature: -40°C minimum 85°C maximum Operating temperature: 5°C minimum 40°C maximum Operating humidity: 5% to 95% non-condensing Safety This unit meets the safety requirements of UL 1950, CSA C22.2 No. 950, and EN 60950; the EMI requirements of FCC Class A and EN 55022 Class A; and the EMC requirements of EN 50082-1.
BRIM-F Book Page 1 Monday, January 29, 1996 9:26 AM APPENDIX A BASIC FDDI NETWORKS This Appendix covers basic Fiber Distributed Data Interface (FDDI) network concepts relating to FDDI network design and installation. ANSI Standard X3T9.5 provides greater detail on FDDI access methods. Reference this standard whenever you need more complete information. Specific areas presented here include: • Basic FDDI Concepts • FDDI Devices • Design and Installation Considerations. A.
BRIM-F Book Page 2 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS When a station has a frame waiting to transmit, the station captures the token at the next opportunity, transmits the data frame, and then reissues the token. (A Token Holding Timer (THT) controls the maximum length of time that any station may retain the token.) Each station receives and repeats the data frame as it circulates around the ring.
BRIM-F Book Page 3 Monday, January 29, 1996 9:26 AM Reliability Ethernet/802.3 Network Ethernet/802.3 Network ETHERNET to FDDI BRIDGE ETHERNET to FDDI BRIDGE FDDI NETWORK DUAL ATTACHED STATION File Server DUAL ATTACHED CONCENTRATOR SINGLE ATTACHED CONCENTRATOR Single Attached Stations Figure A-1. Typical FDDI Physical Installation A.3 Reliability FDDI networks employ a ring topology and are inherently vulnerable to the frailties of each ring segment and failures of individual stations.
BRIM-F Book Page 4 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS CONCENTRATOR 3 PRIMARY RING B WRAP A B SECONDARY RING A CONCENTRATOR 4 CONCENTRATOR 2 B A B A CONCENTRATOR 1 Figure A-2. Wrapping a Broken Ring A.4 ANSI Standard X3T9.5 The X3T9.5 standard includes: Station Management (SMT), Media Access Control (MAC), Physical Layer Medium Dependent (PMD) standards and Physical Layer Protocol (PHY).
BRIM-F Book Page 5 Monday, January 29, 1996 9:26 AM ANSI Standard X3T9.
BRIM-F Book Page 6 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS Other functions of the PHY include generation of a 125 Mhz transmit clock, synchronization of the receive clock with an upstream transmitter, encoding and decoding for media control symbols, and in some applications, buffering for the incoming bit stream. The MAC entity resides on the lower sublayer of the Data Link layer.
BRIM-F Book Page 7 Monday, January 29, 1996 9:26 AM ANSI Standard X3T9.5 SMT (Station Management) manages the FDDI station. It controls internal FDDI station processes and protocol compliance and provides an interface for human intervention. Internal SMT management functions consist of three major categories: SMT Frame Services, Ring Management (RMT), and Connection Management (CMT).
BRIM-F Book Page 8 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS Connection Management (CMT) controls physical layer insertion and removal of stations. CMT has three main components: • Entity Coordination Management (ECM) controls bypass switches and coordinates trace (recovery) functions. • Configuration Management (CFM) controls PHY and MAC entity configuration within a node. Attaching or removing a station from the ring changes the logical structure of the ring.
BRIM-F Book Page 9 Monday, January 29, 1996 9:26 AM FDDI Devices Port A Port A Port B 1 Port M Port B 2 Port M Backup Connection Port M Port M Primary Port B Connection Port A 3 Figure A-6. Dual Homing Topology Concentrator 3 in Figure A-6 has redundant connections to the main ring through either concentrator 1 or 2. The FDDI connection rules only permit one active connection, Port B. If a cable failure severs concentrator 3’s connection to concentrator 2, CFM activates Port A. A.
BRIM-F Book Page 10 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS Each physical ring connection requires: • • one PMD one PHY. A SAS consists of: • • • • one SMT one MAC one PMD one PHY. A DAS consists of: • • two PMDs two PHYs.
BRIM-F Book Page 11 Monday, January 29, 1996 9:26 AM FDDI Devices FDDI devices physically attach to the ring using Fixed Shroud Duplex (FSD) media interface connectors. The X3T9.5 Physical Layer, PMD standard defines four connector types (see Figure A-7). These connectors provide proper trunk fiber alignment for each of the valid configurations. Types A, B, and M provide precision connection (i.e., mechanical keying to assure proper connection to Primary-In and Primary-Out fibers).
BRIM-F Book Page 12 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS Optical bypass switches, concentrators, and bridges exist throughout FDDI networks. These devices allow creation of ring topologies that meet the specific needs of different network applications. Repeaters, often found in other network topologies, do not exist as entities for FDDI networks. This is because all devices that attach to the FDDI main ring must comply with FDDI protocol.
BRIM-F Book Page 13 Monday, January 29, 1996 9:26 AM FDDI Devices BYPASS STATE Station Power Off OPERATIONAL STATE Station Power On STATION STATION FDDI Dual Optical Bypass Switch FDDI Dual Optical Bypass Switch FDDI RING FDDI RING Figure A-9. Optical Bypass Switch A concentrator is a hub. It provides connections to the dual ring for single attached stations and controls their access to the ring.
BRIM-F Book Page 14 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS Ethernet/802.3 Network Single Attached Stations File Server Ethernet/802.3 Network ETHERNET to FDDI BRIDGE ETHERNET to FDDI BRIDGE FDDI NETWORK DUAL ATTACHED CONCENTRATOR FDDI to FDDI BRIDGE FDDI NETWORK DUAL ATTACHED STATION DAS Ethernet/802.3 Network DUAL ATTACHED CONCENTRATOR DUAL ATTACHED CONCENTRATOR ETHERNET to FDDI BRIDGE SINGLE ATTACHED CONCENTRATOR Single Attached Stations Figure A-10.
BRIM-F Book Page 15 Monday, January 29, 1996 9:26 AM Design Considerations For FDDI Networks To translate fiber path to ring length, remember that FDDI networks contain two counter-rotating rings. Under normal conditions (no failed segment), the ring length remains the same as the fiber path length. However, if a wrap occurs, the length of the fiber path length could nearly double. To safely establish the maximum ring length, divide the fiber length by two.
BRIM-F Book Page 16 Monday, January 29, 1996 9:26 AM APPENDIX A: BASIC FDDI NETWORKS The attenuation of the typical multimode fiber optic cable used in FDDI networks is 2.5 dB/km or 5 dB for the 2 km maximum node separation. When installing optical bypass switches, each switch could add 2.5 dB to the attenuation. With an 11 dB budget to work with, and 5 dB expended on the cable, you can install a maximum of two bypass switches. A.7.
BRIM-F Book Page 17 Monday, January 29, 1996 9:26 AM Design Considerations For FDDI Networks DAS 2 16 PHYSICAL CONNECTIONS DAC 1 +1 2 2 SAC 2 2 SAS 2 SAS 2 SAS 2 SAS 2 SAS Figure A-11.
