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Cabletron Systems STHI User Manual

Intelligent token ring stackable hub
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STHI
INTELLIGENT
TOKEN RING STACKABLE HUB
USER'S GUIDE
CABLETRON SYSTEMS, P. O. Box 5005 Rochester, NH 03866-5005

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  • Page 1 STHI INTELLIGENT TOKEN RING STACKABLE HUB USER’S GUIDE CABLETRON SYSTEMS, P. O. Box 5005 Rochester, NH 03866-5005...
  • Page 2 NOTICE 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.
  • Page 3 IMPORTANT: Before utilizing this product, carefully read this License Agreement. This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in firmware, chips or other media.
  • Page 4 CABLETRON SOFTWARE PROGRAM LICENSE 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.
  • Page 5 NOTICE UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

  • Page 6: Table Of Contents

    1.1 Contents of This Manual......1-1 1.2 STHI Overview........1-1 1.2.1 LANVIEW LEDs .
  • Page 7 4.3 The Reset Button....... . . 4-3 4.4 NVRAM Reset Switch ......4-4...
  • Page 8 5.5.1 Trap Destination ......5-13 5.5.2 Trap Community Name ....5-13 5.5.3 Enable Traps .
  • Page 9 A.3.1 TPIM-F2 for Multimode Fiber ....A-3 A.3.2 TPIM-F3 for Single Mode Fiber....A-4 Appendix B Media Specifications B.1 Unshielded Twisted Pair (UTP) .

  • Page 10: Chapter 1 Introduction

    Welcome to the Cabletron Systems STHI Intelligent Stackable Token Ring Hub User’s Guide. Please read through this manual to gain an understanding of the features and capabilities of the STHI. A general knowledge of IEEE 802.5 Token Ring communications networks and their physical layer components will be helpful.

  • Page 11: Lanview Leds

    TCU ports to the LAN, bringing the total count to a maximum of 120 managed TCU ports in the stack. The STHI serves as the logical “top” of the stack and provides full frame and error statistics for the managed ring.

  • Page 12: Tcu Ports

    COM Ports, for pinouts. Lobe Port and Multiple Ring Out Port Configurations Each TCU port on the STHI is internally defaulted to operate as a lobe interface to support the insertion of a Token Ring station into a ring. However, each TCU port may also be reconfigured via the Local Management (LM) application (see Section 5.6.3, Port Configuration...

  • Page 13: Ri & Ro Ports

    1.2.3 RI & RO Ports The STHI incorporates a pair of RI/RO port sockets for Token Ring Port Interface Modules (TPIMs). This Ring In / Ring Out port pair allows for the expansion of the main ring to other hubs. Refer to Section 5.6.3, Port Configuration Fields, Subsection RING OUT ENABLE Mode, for the procedure to enable RI/RO ports.

  • Page 14: Hub-By-Hub Bypass Control

    1.2.4 Hub-By-Hub Bypass Control Unless otherwise configured by a user, all hubs in an STH/STHI stack are interconnected to form a continuous Token Ring. Through Local Management, however, each hub may be individually bypassed from the continuous ring to form its own isolated ring which does not exchange data with the other hubs.

  • Page 15: Flash Downloads

    BootP requests at user-set intervals, essentially asking “does anybody know my name?” If the BootP server recognizes the MAC address, it tells the STHI what IP address has been attributed to it. If no BootP sever responds after 500 request cycles, the STHI automatically boots from its own FLASH memory and remains without an IP address until a user provides one through the Local Management interface.
  • Page 16 Hub with Ring In / Ring Out RING OUT TCU MAU CONFIGURATION When each MAU is individually connected to the STHi hub, only one MAU must be bypassed to isolate the hub from a beaconing MAU station. The stations on that MAU still go down, but the remaining MAUs and their stations stay operational.

  • Page 17: Local Management

    The STHI hub’s Local Management application displays packet and error statistics for the entire stack, for each individual device, or for individual ports, and enables the user to provide management support for the STHI and all its attached segments. Users with actual or emulated VT100 dumb terminals may access Local Management out-of-band via the RJ45 COM port.
  • Page 18 Getting Help By FTP ctron.com (134.141.197.25) Login: anonymous Password: your email address By United States Cabletron Systems, Inc. Postal Service P.O. Box 5005 Rochester, NH 03866-5005 Page 1-9...

  • Page 19: Chapter 2 Requirements & Specifications

    Maximum Number of Stations on a Ring The maximum stack composed of four 24-port STH hubs and one 24-port STHI offers a total of 120 TCU ports, but the number of ports available on the LAN may be increased by the use of passive Multi-Station Access Units (see to Section 1.2.6, Support for Passive MAU Workgroups) and...
  • Page 20 General Networking Considerations Crosstalk Crosstalk is interference caused by signal coupling between different cable pairs contained within a multi-pair cable bundle. Multi-pair cables should not be used for UTP lobe cabling. Avoid mixing Token Ring signals with other applications (voice, etc.) within the same cable. Noise Noise can be caused by either crosstalk or externally induced impulses.

  • Page 21: Operating Specifications

    TCU and COM Ports The STHI hub’s network ports are female RJ45 connectors. The pinouts shown in Figure 2-1 are common to all STHI and STH TCU ports. On STHI models -42/-44, each RJ45 connector is encased in a metallic shield which provides a means of connection for the STP cable shield.
  • Page 22 Operating Specifications Shield continuity is maintained by contacts within the female RJ45 that contact the metallic casing of the male RJ45 on the STP lobe cable. The COM port is a female RJ45 connector supporting EIA RS232C connections via cables with pinout configurations as specified in Figure 2-2 or Figure 2-3.

  • Page 23: Supported Mib Groups

    Ring Speed The operating ring speed for the STHI may be set via the Ring Speed Switch on the front face of the STHI or by MIB commands via the SNMP Tool screen in Local Management. The STHI hub’s Ring Speed switch setting is read only at power-up. In order to change the ring speed via the Ring Speed switch, the user must first change the switch setting and then reset the STHI (see Section 4.3, The...

  • Page 24: Ring Sequence

    Beginning at the STHI hub’s lowest numbered inserted port, list in ascending numerical order the number of each inserted port. If STH hubs have been stacked to the STHI, then continue by listing those inserted in the STH hub numbered lowest in the stack. Repeatedly move to each next STH and list the inserted ports in numerical order until all ports inserted into the ring have been listed.

  • Page 25: Computing Hardware

    +5 to +50 C fluctuation 10 per hour -30 to +90 C 5 to 95% (non-condensing) Dimensions: 2.8 H x 17.0 W x 8.0 D inches (7.2 x 43.6 x 20.5 cm) STHI-22/42: 523,989 hours STHI-24/44: 505,811 hours Operating Specifications Page 2-7...

  • Page 26: Chapter 3 Installation

    Requirements & Specifications, before installing the STHI. 3.1 Installing the STHI The STHI may be installed as a stand-alone hub or as part of a stack. Provided with the STHI is an accessory kit that includes rack-mount brackets for installations into 19 inch racks, wall-mount brackets and mounting screws for installations on walls, and a strain relief bracket to direct the stresses inflicted by cables hanging from the TCU ports.

  • Page 27: Stacking The Sthi

    Use of longer screws may cause damage to the unit or electrical shock to the user. WARNING Carefully turn the STHI upside down. Attach the strain relief bracket to the bottom of the STHI as shown in Figure 3-1. Figure 3-1. Attaching the Strain Relief Bracket 3.1.4...

  • Page 28: Wall-Mounting The Sthi

    Figure 3-3. Installing the STHI in a Rack 3.1.5 Wall-Mounting the STHI When an STHI is installed on a wall, it must face downward so that all attached cables will hang straight out from the TCUs, rather than prying at angles to the ports.
  • Page 29 Installing the STHI Figure 3-4. Installing the Wall-Mounting Brackets 2. Select a wall location for the STHI within 7 feet of a power outlet. Potential SHOCK HAZARD: Select a wall location where pilot holes for screws will not intersect with electrical wiring WARNING in the wall.

  • Page 30: Free-Standing Installations

    3.1.6 Free-Standing Installations For a free-standing shelf of table-top installation, install the STHI on an unrestricted free surface area 21 inches wide, 18 inched deep, and 6 inches high, within 7 feet of its power source, as shown in Figure 3-6.

  • Page 31: Connecting The Sthi To The Power Source

    3.1.7 Connecting the STHI to the Power Source Plug one end of the power cord into the back panel of the STHI and connect the other end into a grounded wall outlet. Verify that the PWR LED is on, indicating that the STHI is receiving power.

  • Page 32: Chapter 4 Troubleshooting

    4.1 LANVIEW LED Signals The STHI incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System. These LEDs can help in the diagnosis of physical layer problems such as power failures or cable faults. Table 4-1 lists the LANVIEW LEDs and defines their messages: Table 4-1.

  • Page 33: Trouble Resolution

    Appendix A, TPIM Specifications. Ring Speed Fault The network device being linked at this port is operating at a ring speed different from the STHI hub’s currently set ring speed. Set the two devices to the same speed. Page 4-2 Condition Port enabled but not linked.

  • Page 34: The Reset Button

    Management Failure If the MGMT LED is red, try resetting the STHI. If this does not resolve the problem, contact Cabletron Systems Tech Support. Meanwhile, the STHI will continue to operate, but will not provide Beacon Recovery or statistical monitoring.

  • Page 35: Nvram Reset Switch

    The STHI incorporates a recessed NVRAM Reset switch (see Figure 4-2) which initializes NVRAM, the nonvolatile random access memory. To use it, toggle the switch and then reset the STHI. This clears all user configurations and settings and returns the STHI to its factory defaults.

  • Page 36: Chapter 5 Local Management

    Local Management This chapter explains how to set up a console to access the STHI’s Local Management interface (LM) and explains how to use LM screens and commands. Users wishing to skip instructions for connecting a NOTE management terminal to the STHI may proceed directly to Section 5.2 for instructions regarding the use of LM.

  • Page 37: Dumb Terminal Configuration

    Accessing LM 5.1.1 Dumb Terminal Configuration Configure the LM console according to the parameter settings defined in Table 5-1. On VT100/200/300 series terminals, press F3 to access the Setup Directory. For setup parameters not listed in the following table, any selection should be acceptable.

  • Page 38: Console Cable Configuration

    Console Cable Configuration Connect the console cable to the STHI as follows: 1. Attach the male RJ45 connector to the COM port of the STHI. 2. Attach the female end to the 25-pin or 9-pin COM port on the terminal.

  • Page 39: Using Lm Screens

    Using LM Screens bottom line of the screen, then the Main Menu screen shown in Figure 5-2 appears. STHI LOCAL MANAGEMENT Screen Title Line Screen Commands Line Figure 5-2. Main Menu with Screen Anatomy Labels As a precaution against unauthorized access, if LM detects...
  • Page 40 Setting or Modifying Fields The Field Sensitive Help Line offers help while certain fields are selected. The Event Message Line reports the status of certain field-related actions (e.g.: “Saved OK” or “Bad Value”). 1. Use the Tab key or arrow keys to highlight fields. Set the new value: With toggle fields (those that appear in square brackets), use the Return key to scroll through to the desired option.

  • Page 41: Screen Hierarchy

    Status screen, the Device Statistics screen, and the SNMP Tool screen. 5.2.3 Screen Introductions System Level The System Level screen (Section 5.3) is used to provide the STHI with basic configuration settings including IP address, Locally Administered physical address, subnet mask, Beacon Recovery options, and Runtime IP Address Discovery.
  • Page 42 SNMP Traps The SNMP Traps screen (Section 5.5) is used to designate which Network Management Workstations will receive SNMP traps from the STHI, and to provide those stations with community names for access to various MIBs. Chassis Status View The Chassis Status View screen (Section 5.6) is used to monitor and configure the modules in the stack, to set operational configurations for TCU ports and RI/RO ports, and to execute port/module bypassing.

  • Page 43: The System Level Screen

    “Invalid Date” or “Invalid Time” appears and the edit is rejected. 5.3.2 IP Address Use this field to set the host Internet Protocol (IP) address for the STHI. If the IP Address is changed, the STHI will execute a soft-reset after is invoked to re-initialize all affected parameters.

  • Page 44: Subnet Mask

    The Subnet Mask determines how the STHI directs SNMP Trap messages (discussed in Section 5.5). The mask defines the portion of the trap destination’s IP address to be compared to the IP address of the STHI. If the designated address portions match, the destination station is determined to exist on the same subnet as the STHI;...

  • Page 45: Enable Beacon Recovery

    Cabletron Systems devices. If beacon recovery is enabled, ABRP is automatically invoked whenever the STHI detects a beaconing condition on the ring. It is often able to correct the problem before the standard IEEE process even begins. Once ABRP locates the problem and corrects it, the STHI generates traps to provide the network’s designated remote management station with the...

  • Page 46: Mac Address

    MAC address to identify the FNB interface at the network’s physical layer. If enabled, the locally administered address takes effect after the next reset of the STHI. 5.4 The SNMP Community Names Screen Access the SNMP Community Names screen, shown in Figure 5-5, from the Device Setup menu.

  • Page 47: Community Name

    The SNMP Community Names Screen The SNMP Community Names screen enables the user to establish or modify the community names which serve as passwords to LM and to determine the level of security access the LM user is accorded. 5.4.1 Community Name Use these fields to define community name strings.

  • Page 48: The Snmp Traps Screen

    SAVE Figure 5-6. SNMP Traps Screen The SNMP Traps screen is used to provide the STHI with the IP addresses of remote management stations intended to receive SNMP traps, and to provide those stations with the community names they will need to access the STHI with SNMP requests.

  • Page 49: The Chassis Status View Screen

    The Chassis Status View Screen 5.6 The Chassis Status View Screen Access the Chassis Status View screen (Figure 5-7) from the Device Status menu. STHI LOCAL MANAGEMENT CHASSIS STATUS VIEW ( Multiplexer Line Ring Speed Line Port Fields NEXT Figure 5-7. Chassis Status View Screen with Anatomy Labels...

  • Page 50: Multiplexer Configuration Fields

    5.6.2 Multiplexer Configuration Fields All hubs in an STH/STHI stack are interconnected to form a single Token Ring LAN, logically organized and represented on the LM screen (Figure 5-7, page 5-14) as a string of left/right neighbors. The multiplexer fields on the multiplexer line indicate the state of each hub’s connection to...

  • Page 51: Port Configuration Fields

    |–B–> stack’s common ring. The ring connection is continued by a neighbor hub to the right. Attached left - The STHI is connected to the stack’s common <–––| ring. The ring connection is continued by an STH to the left and possibly extended through TPIM Ring In / Ring Out ports as well.
  • Page 52 Each port field (whether TPIM or TCU) may be set as follows: The port is enabled and will allow insertion. The port is disabled. STHI LOCAL MANAGEMENT CHASSIS STATUS VIEW ( ADMINISTRATIVE NEXT Figure 5-8. Chassis Status View Screen in...
  • Page 53 (Figure 5-9), all Port Status fields become toggle fields which allow the user to set the current configuration of each TCU port to either station or Ring Out. STHI LOCAL MANAGEMENT CHASSIS STATUS VIEW ( RING OUT ENABLE ) NEXT Figure 5-9.

  • Page 54: Operational Mode

    (Figure 5-7), the Chassis Status View screen is OPERATIONAL read-only, displaying the operational status of all ports throughout the stack. The possible states for Ring ports differ from those for STN TCUs. STHI LOCAL MANAGEMENT CHASSIS STATUS VIEW ( NEXT Figure 5-10. Chassis Status View Screen in...

  • Page 55: Next And Previous

    The Component Status View screen is a read-only screen which lists the enabled/disabled status of the STHI hub’s operating system and associated components. (Software applications, resources, and functions registered in the STHI are known as components.) All compatible Page 5-20 screen commands to view ports from the next or mode.

  • Page 56: The Device Statistics Screen

    STHI, are listed on the Component Status View screen. Components not yet installed in the STHI are listed as disabled. The Component Status View screen may list the following entities: • - the entity that controls the interconnections between Chassis Mgr the hubs in the stack managed by the STHI.

  • Page 57: Screen Mode

    To select another screen mode, invoke it from the screen command line. TOTAL In this mode, the counters display totals since the STHI hub’s last reset. DELTA In this mode, the counters display totals since last screen refresh.

  • Page 58: General Counter Fields (Group 1)

    Frames Received This displays the number of frames received by the STHI. KBytes Received This displays the amount of data (in kilobytes) received by the STHI. Errors Received This displays the number of Isolating and Non-Isolating Errors (described below) detected on the ring.
  • Page 59 The Device Statistics Screen Ring Status This displays the status of the ring to which the STHI is currently connected: if the STHI is bypassed, it refers only to the STHI hub’s internal ring; otherwise, it refers to the stack’s common ring. •...

  • Page 60: Isolating Errors Fields (Group 3)

    5.8.5 Isolating Errors Fields (Group 3) Frames reporting isolating errors provide information that can be used to determine the physical domain of a fault. These errors are common soft errors, meaning that they are to be expected and can be overcome by normal Token Ring operations.

  • Page 61: Non-Isolating Errors (Group 4)

    The Device Statistics Screen Internal Errors Internal errors may be detected by the adapter’s hardware and/or firmware. These errors cause the adapter to remove itself from the ring and indicate a problem with the adapter hardware or firmware. 5.8.6 Non-Isolating Errors (Group 4) Frames reporting non-isolating errors do not provide sufficient information to determine the physical domain of a fault.

  • Page 62: The Snmp Tool Screen

    Figure 5-14. SNMP Tool Screen Through the SNMP Tool screen, the user can access information stored in the STHI hub’s Management Information Base (MIB). MIBs and their objects are logically arranged as trees with subsequent branches and leaves; each leaf is a MIB object. One leaf, for example, contains the hub’s...

  • Page 63: Community Name

    The SNMP Tool Screen IP address; another contains the current operational status of TCU port number 6. To access a specific bit of information, the user specifies an object identifier (OID) which is a series of numbers separated by decimal points that indicates the path through a MIB trunk and subsequent branches to the specific leaf that contains the desired information, effectively identifying the MIB object.

  • Page 64: Getnext

    • Enter an ‘=’ followed by the complete OID. This bypasses the OID prepend specified above, enabling the user to digress from the current MIB branch and access MIB leaves on other branches. If the user enters =4.1.3, then OID 4.1.3 is requested. •...

  • Page 65: Walk

    MIB objects. For example, a super-user may change the current community name protecting a certain MIB, or change the STHI hub’s operating ring speed. Invoke on screen, or press the F7 function key.

  • Page 66: Repeat

    - 1.3.6.1.4.1.52.4.1.5.8.1.1.0 Cabletron’s Download Force On Boot OID determines whether the STHI will force a Flash image download at next reset or will boot from its current Flash file. Set this integer value to 1 to force the download (or 0 to disable).
  • Page 67 - 1.3.6.1.4.1.52.4.1.5.8.1.3.0 Cabletron’s Download Initiate Cold Boot OID is an integer value. When set to 1, it forces the STHI to reset and reboot. This OID must be set last, because the STHI will reset immediately after processing this request.

  • Page 68: Tpim Specifications

    Each TPIM that supports Twisted Pair cabling has two operating modes: Ring In / Ring Out and Station. For use with STHI, the TPIM is switched to operate in Ring In/ Ring Out mode. The pinouts for TPIMs in station applications are different from pinouts for Ring In / Ring Out applications.

  • Page 69: Fiber Optic Tpim Specifications

    Fiber Optic TPIM Specifications TPIM-T1 1. Receive + 2. Ground 3. +5V at 250 mA 4. Ground 5. Transmit - 6. Receive - 7. Ground 8. Ground 9. Transmit + Figure A-1. TPIM-T1/T2/T4 Pinouts for Ring In. TPIM-T1 1. Transmit + 2.

  • Page 70: Tpim-F2 For Multimode Fiber

    Figure A-3. The TPIM-F2 Faceplate. A.3.1 TPIM-F2 for Multimode Fiber The TPIM-F2 connector supports Multimode Fiber Optic Cabling. Table A-2. TPIM-F2 Specifications. Typical Parameter Value Receive -30.5 dBm Sensitivity Peak Input -7.6 dBm Power 50/125 m -13.0 dBm 62.5/125 m -10.0 dBm 100/140 m -7.0 dBm...

  • Page 71: Tpim-F3 For Single Mode Fiber

    Fiber Optic TPIM Specifications A.3.2 TPIM-F3 for Single Mode Fiber The TPIM-F3 connector supports Single Mode Fiber Optic cabling. Transmitter Power decreases as temperatures rise. Use the Output Power Coefficient (-0.15 dBm) to calculate increased or decreased power output for the operating environment. For example, the typical power output at 25 C is -16.4 dBm.
  • Page 72 Fiber Optic TPIM Specifications Table A-3. TPIM-F3 Specifications (Continued) Parameter Typical Minimum Maximum Fall Time 2.5 nsec 2.2 nsec 5.0 nsec Duty Cycle 50.1% 49.6% 50.7% Bit Error Rate: Better than 10 The transmitter power levels given in Table A-3 are Peak Power Levels after optical overshoot.

  • Page 73: Appendix B Media Specifications

    Media Specifications Use of the STHI may involve a variety of cable types. The STHI hub’s network ports support either Shielded Twisted Pair (STP) or Unshielded Twisted Pair (UTP) cabling, depending on the STHI model, while Token Ring Port Interface Modules (TPIMs) allow for network expansions onto UTP, STP, Multimode Fiber Optic, and Single Mode Fiber Optic cabling.

  • Page 74: Utp Lobe Lengths

    UTP Lobe Lengths The physical length of the cable connecting a station to a TCU port on the STHI is referred to as the lobe length. The maximum lobe length attainable under ideal conditions, is shown in Table B-2. Cable routing, connector attenuation, noise, and crosstalk can adversely affect the maximum lobe length.

  • Page 75: Shielded Twisted Pair (Stp

    B.2 Shielded Twisted Pair (STP) STHI models 42 and 44 and TPIM models T1 and T4 support all STP cables classified as IBM Types 1, 2, 6, and 9, all of which meet Token Ring network performance requirements.

  • Page 76: Stp Lobe Lengths

    Shielded Twisted Pair (STP) Table B-3. STP Cable Type Specifications. Operational Type Frequency 1 & 2 4 MHz 16 MHz 6 & 9 4 MHz 16 MHz IBM Type 6 consists of two STP of 26 AWG stranded wire for data. Because of its high attenuation, Type 6 is used only in patch panels or to connect devices to/from wall jacks.

  • Page 77: Single Mode And Multimode Fiber Optic Cabling

    Single Mode and Multimode Fiber Optic Cabling Table B-4. STP Maximum Lengths Max. Lobe Length Type 4 Mbps 1 & 2 200 meters (660 feet) 6 & 9 30 meters (99 feet) B.3 Single Mode and Multimode Fiber Optic Cabling TPIM models F2 and F3 support multimode and singlemode fiber optic cable respectively.

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