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Cabletron Systems TRMIM-10R Installation Manual

Token ring media interface module
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TRMIM-10R
TOKEN RING
MEDIA INTERFACE MODULE

INSTALLATION GUIDE

The Complete Networking Solution
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-5005

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  • Page 1: Installation Guide

    TRMIM-10R TOKEN RING MEDIA INTERFACE MODULE INSTALLATION GUIDE The Complete Networking Solution CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-5005...
  • Page 2 All Rights Reserved Printed in the United States of America Order Number: 9030258 November 90 LANVIEW, Remote LANVIEW Windows, Spectrum, TRMIM-10R, TRRMIM-16, TRMIM-12, MMAC, and FNB are trademarks of Cabletron Systems Inc. IBM is a registered trademark of International Business Machines Corporation.

  • Page 3: Fcc Notice

    FCC NOTICE FCC NOTICE This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference re- ceived, including interference that may cause undesired operation. WARNING: This equipment uses and generates and can radiate radio frequency energy and if not installed properly and used in accordance with the instruction manual, may cause interference to...

  • Page 4: Table Of Contents

    2.2.3 Ring Sequence ...2-7 2.2.4 LANVIEW LEDs ...2-7 CHAPTER 3 INSTALLING THE TRMIM-10R 3.1 Unpacking the TRMIM-10R ...3-1 3.2 Installing the TRMIM-10R into the MMAC ...3-1 3.3 Attaching Cables to the TRMIM-10R ...3-4 3.3.1 Connecting Lobe Cabling ...3-4 3.3.2 Connecting Trunk Cabling ...3-6 3.4 Finishing the Installation...3-7...
  • Page 5 CONTENTS CONTENTS (Cont.) CHAPTER 4 TESTING AND TROUBLESHOOTING 4.1 Installation Check-Out ...4-1 4.2 Using LANVIEW ...4-2 APPENDIX A BASIC TOKEN RING NETWORKS A.1 Basic Token Ring Operation ...A-1 A.2 Design Considerations ...A-7 APPENDIX B APPLICATIONS B.1 Adding to an Existing Token Ring Network ...B-1 B.2 Separate Token Ring Networks in One MMAC ...B-2 B.3 Token Ring Networks Bridged Together ...B-3 B.4 MMAC with Ethernet and Token Ring Simultaneously ...B-3...

  • Page 6: Installation Requirements

    Ring-In and Ring-Out ports. The Ring-In/Ring-Out ports and each of the TRMIM-10R's ten trunk coupling unit ports support IBM Types 1, 2, 6, and 9 shielded twisted pair cabling. The TRMIM-10R is IEEE 802.5 compliant, and compatible with IBM products.

  • Page 7: The Trmim-10R

    TRMIM-10R into a token ring network and ten trunk coupling ports for attaching ten stations. The TRMIM-10R supports lobe lengths up to 200 meters at 4 Mbit/sec and 100 meters at 16 Mbit/sec using IBM Type 1 or Type 2 shielded twisted pair cable.
  • Page 8 Several LEDs are located on the front panel of the TRMIM-10R. These LEDs indicate the ring speed, the detection of a hardware error in the TRMIM-10R, and the status of TRMIM-10R ports. These LEDs are a useful tool for quickly diagnosing physical layer problems.

  • Page 9: Related Manuals

    Cabletron Systems' TRMIM-12 Token Ring Media Interface Module Installation Guide. Cabletron Systems' TRRMIM-16 Token Ring Repeater Media Interface Module Installation Guide. 1.4 RECOMMENDED READING The following publications are recommended if more information is required on implementing a Token Ring network.

  • Page 10: Chapter 2 Installation Requirements/ Specifications

    The TRMIM-10R supports IBM shielded twisted pair cable Types 1, 2, 6, and 9 for Lobe and Trunk cabling. Table 2-1 lists all of the IBM cable types for reference, but the TRMIM-10R supports Types 1, 2, 6, and 9 only.

  • Page 11: Cable Lengths

    Type 9 = 100 meters of Type 1). 2.1.2 Cable Lengths The TRMIM-10R is a passive concentrator. It neither regenerates nor retimes ring signals and the cable lengths used for the TRMIM- 10R must consider the Adjusted Ring Length (ARL). ARL results from automatic recovery processes that attempt to restore continuity to a broken ring.

  • Page 12: Attenuation

    Lobe Length - This is the physical length of STP cable connecting a station to the trunk coupling unit (TCU) port on the TRMIM-10R. The recommended maximum length for the longest lobe cable is shown in Table 2-2. This is a recommended...

  • Page 13: Impedance

    REQUIREMENTS/SPECIFICATIONS Table 2-3. Maximum Cable Attenuation STP (IBM Types 1 & 2) STP (IBM Types 6 & 9) 2.1.4 Impedance The characteristic impedances for specific cable types are listed in Table 2-4. These are typical impedances, and can vary among different manufacturers of cabling.

  • Page 14: Noise

    2.2.1 Ring Speed The TRMIM-10R can be operated at a ring speed of either 4 Mbit/sec or 16 Mbit/sec. The default ring speed is set by a hardware jumper on the TRMIM-10R. The ring speed can be changed via a software selection (refer to the applicable Remote LANVIEW Network Management Users Guide) that overrides the jumper selection.
  • Page 15 • Trunk Connections - Two Female DB-9 connectors for attaching STP trunk cables are located on the lower left side of the TRMIM-10R front panel. Figure 2-2 show the signal and pin assignments for the STP ring interface. Trunk Ports: Ring-In 1 RX–...

  • Page 16: Ring Sequence

    Example: TRMIM-22P in slot 1 with ports 2, 5, 8, & 12 in use. TRMIM-10R in slot 2 with ports 1, 2, 3, 5, and 6 in use. TRMIM-12 in slot 3 with ports 1, 5, 7, 11, & 12 in use.
  • Page 17 Figure 2-3. TRMIM-10R LANVIEW LEDs SAFETY WARNING: It is the responsibility of the person who sells the system to which the TRMIM-10R will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions.
  • Page 18 REQUIREMENTS/SPECIFICATIONS SERVICE MTBF (MHBK-217E): MTTR: PHYSICAL Dimensions: Weight: >119,951 hrs. <0.5 hr. 13.4D x 11.5H x 2.0W inches (34.0D x 29.2H x 5.1W centimeters) (includes front panel) 2 lbs. 2 oz. (963.9 grams) Page 2-9...

  • Page 19: Chapter 3 Installing The Trmim-10R

    Avoid touching the components or surface of the TRMIM-10R. 2. Remove the TRMIM-10R from its protective plastic bag and set it on top of its protective bag in a static free area.
  • Page 20 INSTALLING THE TRMIM-10R • If the TRMIM-10R is being installed into an MMAC-8, or MMAC- 8FNB, be sure that a Power Supply Module (PSM or PSM-R) is installed in the associated rear power supply slot. The PSM or PSM-R is the source of power for MMAC modules. One PSM or PSM-R is required for every two MIMs.
  • Page 21 (Six on mother board, and six on daughter board) 4 Mbit/sec 16 Mbit/sec Network Speed Jumper Figure 3-1. Network Speed Jumper MMAC-8 TRMIM-10R BOARD SLOT Figure 3-2. Installing the TRMIM-10R INSTALLING THE TRMIM-10R Mother board Daughter board KNURLED KNOBS TRMIM-10R TOKEN RING Page 3-3...

  • Page 22: Attaching Cables To The Trmim-10R

    Chapter 2, Installation Requirements/Specifications. The trunk coupling unit (TCU) and Ring-In/Ring-Out trunk ports of the TRMIM-10R are not sensitive to signal polarity. If the (+) and (-) lines within a pair are reversed, the network will still function properly due to the differential Manchester encoding. Operating in this condition is not recommended.

  • Page 23: Connecting Trunk Cabling

    1. Connect the male DB-9 connector from one end of the STP lobe or patch panel cable to the desired TCU port on the TRMIM-10R . 2. If a patch panel is being used, connect the other end of the cable to the appropriate patch panel jack.

  • Page 24: Finishing The Installation

    INSTALLING THE TRMIM-10R 2. If a patch panel is being used, connect Ring-In from the patch panel to Ring-In on the TRMIM-10R and Ring-Out from the patch panel to Ring-Out on the TRMIM-10R. If connecting directly to another concentrator, daisy-chain the connections, Ring-In to Ring-Out, from concentrator to concentrator.

  • Page 25: Chapter 4 Testing And Troubleshooting

    CHAPTER 4 TESTING AND TROUBLESHOOTING This section contains procedures to verify the cabling connecting the TRMIM-10R to the token ring network and any attached stations. A description of LANVIEW and its function in troubleshooting physical layer network problems is also provided.

  • Page 26: Using Lanview

    TESTING AND TROUBLESHOOTING When these checks have been successfully completed for each connec- tion to the TRMIM-10R, the MIM is ready for normal operation. If further problems occur, contact Cabletron Systems' Technical Sup- port. 4.2 USING LANVIEW LANVIEW is Cabletron Systems' built-in visual diagnostic and status monitoring system.
  • Page 27 J1 (refer to Chapter 3, Installing the TRMIM-10R, for setting this jumper). The TRMIM-10R is set to the default ring speed at power on. The ring speed can be changed via local network management software.

  • Page 28: Basic Token Ring Operation

    BASIC TOKEN RING NETWORKS APPENDIX A BASIC TOKEN RING NETWORKS This Appendix covers the basic operation and concepts related to design considerations for token ring networks. A.1 BASIC TOKEN RING OPERATION A token ring network is made up of a number of stations electrically connected to form a continuous loop.
  • Page 29 BASIC TOKEN RING NETWORKS Basic Token Ring Protocol This summary briefly covers a basic subset of the overall token ring access protocol. The IEEE Standard 802.5 provides greater detail on token ring access methods and should be referenced whenever more complete information is needed.
  • Page 30 The frame addressed for yyy circulates around the ring. All stations in the ring examine the frame, checking the address, in successive order. When the transmission gets to yyy, station yyy copies the data as it goes past. When the original transmission finishes the trip around the ring and is seen by station xxx again, station xxx removes the transmission from the ring.
  • Page 31 BASIC TOKEN RING NETWORKS Early Token Release Early Token Release (ETR) is a second protocol option presented in the IEEE 802.5 Standard. ETR is an optional protocol that may be used with 16 Mbit/sec 802.5 token ring networks. It has the advantage of increasing the efficiency of the ring by allowing transmissions from more than one station to occupy the ring at the same time.
  • Page 32 (4 Mbit/sec vs. 16 Mbit/sec). They do not expand a single network, rather they connect multiple networks together. They maintain routing information, filter messages that cross the bridge, regenerate signals and provide buffering required for network synchronization. MMAC Chassis TRMIM-10R Concentrator #1 Ring-In Ring-Out Ring-Out MMAC Chassis Figure A-3.
  • Page 33 BASIC TOKEN RING NETWORKS Reliability Since token ring networks depend on ring topology for proper operation, the entire network is vulnerable to the frailties of each ring segment. Arranging the ring as a star, using concentrators, and providing trunk coupling units for the station connections reduce the risk of a single failing node bringing the entire network down.

  • Page 34: Design Considerations

    A.2 DESIGN CONSIDERATIONS A major design consideration is ring length. The ring propagation must be long enough to accommodate an entire token (24 bit times) and still be short enough for the transmitting devices to reliably send information to the next station. The AM inserts an artificial delay that prevents the ring from appearing too short.
  • Page 35 BASIC TOKEN RING NETWORKS ARL is calculated by combining the lengths of all the trunk cables, subtracting the length of the shortest trunk cable (typically an 8-foot patch cable within a wiring closet) and then doubling the result (Lobe cabling is not part of the ARL calculation). The impact of ARL on drive distance is apparent when we examine the resulting calculation for drive distance.

  • Page 36: Appendix B Applications

    APPLICATIONS This Appendix presents the following network applications as ex- amples of how the TRMIM-10R may be used in a token ring network. These are examples to help clarify features of the TRMIM-10R and applications are NOT limited to those shown here.

  • Page 37: Separate Token Ring Networks In One Mmac

    MMAC-8FNB, one TRMIM-10R, one TRMIM-22P, five TRMIM-12s and one IRM. Slot 0 IRM Slot 1 TRMIM-10R for ring network #1 at 4 Mbit/sec Slot 2 TRMIM-22P for ring network #1 at 4 Mbit/sec Slot 3 first TRMIM-12 for ring network #2 at 4 Mbit/sec...

  • Page 38: Token Ring Networks Bridged Together

    in One MMAC-8FNB B.3 TOKEN RING NETWORKS BRIDGED TOGETHER Figure B-3 illustrates the bridging of two token ring networks together using a token ring to token ring network bridge. Bridging ring networks is necessary when: the networks are of different ring speeds (one at 4 Mbit/sec and the other at 16 Mbit/sec), or when there is a need for networks to be connected and one or both of the rings is at maximum capacity.
  • Page 39 APPLICATIONS not able to communicate with each other. MMAC-8FNB with IRM, THN-MIM, and TRMIM-12. Token Ring Network Figure B-4. Token Ring and Ethernet in the Same MMAC Page B-4 Ethernet Network AUI Cable Since the Ethernet and Token Ring Networks are NOT Bridged together by a bridging device, they can NOT share...

  • Page 40: Appendix C Calculating Ring Length

    APPENDIX C CALCULATING RING LENGTH This Appendix presents methods for calculating cable lengths for passive token ring networks or passive network segments giving consideration to adjusted ring length (ARL). These calculations differ between networks that are wholly contained within a single wiring closet and networks spanning multiple wiring closets.

  • Page 41: Single Wiring Closet Networks

    CALCULATING RING LENGTH • With the exception of the wall plate to station cable, all the remaining Lobe and Trunk cables are Type 1 or Type 2. • Wherever Type 6 or Type 9 cable is used, the length must be converted to the equivalent Type 1 cable length as follows: (Length of Type 6 or 9 cable) x 3/2 = Equivalent Type 1 or 2 length...
  • Page 42 4. Determine your Actual Longest Lobe length, combine: TCU Port to patch panel (8 feet x 3/2) Wall plate to wiring closet Station to wall plate (If type 6, x 3/2) Compare the Maximum Type 1 Lobe Length, calculated in step 3, with your network's longest lobe, from Step 4.
  • Page 43 CALCULATING RING LENGTH STATION 1 WALL PLATE 8' of 140' of Type 6 TYPE 1 WIRING CLOSET Figure C-1. Wiring in a Single Wiring Closet Formulas Two formulas were used to create the tables for the STP Cable Length Worksheets. The first defines the cabling for a single wiring closet with only one rack and the second for multiple racks within the wiring closet.
  • Page 44 Single Rack Internal Trunk Length = (Concentrator to Concentrator Patch Cables) where: Concentrator to Concentrator Patch Cables = 12' x number of Concentrators (see note) Note: A patch cable or wrap connectors must be installed when only one concentrator is configured. Multiple Rack Internal Trunk Length = (Rack to Rack Patch Cables +...
  • Page 45 CALCULATING RING LENGTH STP CABLE LENGTH WORKSHEET Single Wiring Closet 1. Maximum Drive Limit (1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s) 2. Internal Trunk Length (Value from Table below) 3. Maximum Type 1 Lobe Length (1) – (2) = (3) 4.
  • Page 46 STP CABLE LENGTH WORKSHEET Single Wiring Closet 1. Maximum Drive Limit (1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s) 2. Internal Trunk Length (Value from Table below) 3. Maximum Type 1 Lobe Length (1) – (2) = (3) 4.

  • Page 47: Multiple Wiring Closet Networks

    CALCULATING RING LENGTH C.3 MULTIPLE WIRING CLOSET NETWORKS In multiple wiring closet applications, both external trunk cable length and lobe cable length must be considered in the overall drive distance for a passive ring. Use the STP Cable Length Worksheet, Multiple Wiring Closet form at the end of this section to determine the cable lengths that can be used in multiple wiring closet token ring applications.
  • Page 48 Find the total length of the Actual Trunk Cable lengths between wiring closets. Compare the Actual Trunk Cable length with the External Trunk Cable Budget (step 5). When your Actual Trunk Cable length exceeds the External Trunk Cable Budget (negative result in step 7), you must either adjust your lobe/ trunk lengths or add active components (repeaters) to extend the available trunk cable length.
  • Page 49 CALCULATING RING LENGTH WC-1 2 Racks 6 Concentrators Token Ring Corporation 117 feet Figure C-2. Building Cable Budget Formulas The formulas used to create the tables for the STP Cable Length Worksheets yield values equal to the length of internal cabling within wiring closets (see Figure C-3) in a multiple closet configuration.
  • Page 50 where: TCU Patch Cables = 12' Rack to Rack Patch Cables = 45' x (number of Racks - 1) Concentrator to Concentrator Patch Cables = 12' x (number of Concentrators - number of Racks) To Next Wiring Closet TYPE 1 or 2 STATION 1 WALL...
  • Page 51 CALCULATING RING LENGTH STP CABLE LENGTH WORKSHEET Multiple Wiring Closets 1. Actual Longest STP Lobe 2. Combined Trunk Length (Sum of values for all closets, from Table below) 3. Internal Drive Distance (1) + (2) = (3) 4. Maximum Drive Limit (1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s) (from 3) 4a.
  • Page 52 STP CABLE LENGTH WORKSHEET Multiple Wiring Closets 1. Actual Longest STP Lobe 2. Combined Trunk Length (Sum of values for all closets, from Table below) 3. Internal Drive Distance (1) + (2) = (3) 4. Maximum Drive Limit (1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s) (from 3) 4a.

  • Page 53: Calculating Mixed Cable Types

    120 stations. This exercise connects an additional station to an open TCU port on existing TRMIM-10R. The new station will require the longest lobe cable yet installed, 285 feet. From the table at the bottom of the Single Wiring Closet Cable Length Worksheet, we find the adjusted internal cable length for the wiring closet is 243 feet.
  • Page 54 Solution 1. Determine the Type 1 cable budget available for lobe cabling. Drive Limit (Type 1, 16 Mbit/sec) Type 1 cable length already expended Type 1 budget for the longest lobe 2. Find the Type 1 equivalent for the TCU to patch panel and wall jack to station Type 6 patch cables.

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