STHI INTELLIGENT TOKEN RING STACKABLE HUB USER’S GUIDE CABLETRON SYSTEMS, P. O.
NOTICE NOTICE 1 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 FCC NOTICE 2 This device complies with Part 15 of the 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 received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
NOTICE CABLETRON SOFTWARE PROGRAM LICENSE 1. 5 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 UNITED STATES GOVERNMENT RESTRICTED RIGHTS 7 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.
CONTENTS CHAPTER 1 1.1 1.2 1.3 1.4 Contents of This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 STHI Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2.1 LANVIEW LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2.2 TCU Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.3 RI & RO Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.2.4 Hub-By-Hub Bypass Control . . . . . . . . . . . . . . . . .
CONTENTS 3.2 3.3 3.1.4 Rack-Mounting the STHI . . . . . . . . . . . . . . . . . . . . 3-2 3.1.5 Wall-Mounting the STHI . . . . . . . . . . . . . . . . . . . . 3-3 3.1.6 Free-Standing Installations . . . . . . . . . . . . . . . . . . . 3-5 3.1.7 Connecting the STHI to the Power Source . . . . . . . 3-6 TPIM Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Finishing the Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 CHAPTER 4 4.1 4.2 4.3 4.
CONTENTS 5.6 5.7 5.8 5.9 5.5.1 Trap Destination . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 5.5.2 Trap Community Name . . . . . . . . . . . . . . . . . . . . 5-13 5.5.3 Enable Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 The Chassis Status View Screen. . . . . . . . . . . . . . . . . . . . 5-14 5.6.1 The Screen Mode Screen Command. . . . . . . . . . . 5-14 5.6.2 Multiplexer Configuration Fields . . . . . . . . . . . . . 5-15 5.6.3 Port Configuration Fields . . . . .
CONTENTS 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) . . . . . . . . . . . . . . . . . . . . .B-1 B.1.1 UTP Cable Categories. . . . . . . . . . . . . . . . . . . . . . .B-1 B.1.2 UTP Lobe Lengths . . . . . . . . . . . . . . . . . . . . . . . . .B-2 B.2 Shielded Twisted Pair (STP). . . . . . . . . . . . . . . . . . . . . . . .B-3 B.2.
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. 1.1 Contents of This Manual Chapter 1, Introduction, outlines the contents of this manual, describes STHI features, and offers leads to further information.
STHI Overview HubSTACK TOKEN RING HUB WITH LANVIEW® SUPPORTING 100 OHM UTP CABLE STHI-24 24X CPU 4M 16M SPEED 16 Mb/s RESET 23X 22X 21X 20X 19X 18X 17X 16X 11X 10X 9X 8X 7X 6X 5X 4X 15X 14X 13X ACT MGMT COM RO 12X 3X 2X 1X RI STHI-24 TOKEN RING HUB WITH LANVIEW® STACK 2 STACK 3 STACK 4 STACK 5 Figure 1-1.
STHI Overview 1.2.2 TCU Ports The four STHI models are functionally identical with the exception of the number and type of network ports they offer: Table 1-1.
STHI Overview Active Circuitry 3 On each TCU port, STHI hubs provide active circuitry which filters, equalizes, and amplifies all received signals before transmitting them to the next point on the ring. The result is enhanced signal integrity and extended maximum station lobe cable distances. Daughter Board Upgrade Kit 4 The following daughter board upgrade kits may be used to expand STHI hubs from 12 to 24 TCU ports: • TR-UTP-UGKT for STHI-22. • TR-STP-UGKT for STHI-42. 1.2.
STHI Overview 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.
STHI Overview Improved Protection from Beaconing 1 By utilizing multiple Ring Out TCU ports, users can provide enhanced reliability for existing networks which use passive MAUs because Ring Out TCU ports allow for the separate attachment of each MAU.
STHI Overview DAISY-CHAIN MAU CONFIGURATION Multi-Station Access Units When MAUs are daisy-chained, they are connected as single collective entity. The entire chain must be bypassed to isolate the hub from a single beaconing station. All stations lose connection if beaconing occurs on any station.
Related Manuals 1.2.9 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. Refer to Section 5.1 for connection instructions. 1.2.
Getting Help By FTP By United States Postal Service ctron.com (134.141.197.25) Login: anonymous Password: your email address Cabletron Systems, Inc. P.O.
CHAPTER 2 Requirements & Specifications This chapter describes network guidelines, power requirements, and operating specifications for the STHI. Before performing the installation, read this chapter and confirm that the network meets the requirements and conditions specified herein. Failure to follow these guidelines may result in poor network performance. Refer to Appendix A, TPIM Specifications, for TPIM specifications. Refer to Appendix B, Media Specifications, for cable specifications. 2.
General Networking Considerations Crosstalk 2 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 3 Noise can be caused by either crosstalk or externally induced impulses.
Operating Specifications • UTP cables that contain Token Ring signals should not be simultaneously used for applications which may impress high voltages (greater than 5 volts) with sharp rise or fall times, since the noise coupling from such signals could directly cause errors on the Token Ring network. • Where practical, dedicated cable should be used for Token Ring signals.
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. RJ45 Plug 8 Female 25 Pin D-Shell 13 25 1 1 14 Transmit......Pin 1 ....... to ......Pin 3 ...... Receive Receive......Pin 4 ....... to ......Pin 2 ...... Transmit Signal Ground......
Operating Specifications 2.2.3 Supported MIB Groups The STHI provides access to the following Management Information Base groups and their respective functionality: Standard MIBs • 1 MIB-2 (RFC 1231) Cabletron Enterprise MIBs • Download • MIB-II Extensions • Token Ring FNB (Flexible Network Bus) • DOT 5 Physical & Logical • Token Ring Station Assignment • Device • PIC MIB (Product Information Chip MIB) • Chassis MIB 2.2.
Operating Specifications NOTE When cancelling a MIB override, the user may have to reset twice (as described in the steps below) to actually change the STHI hub’s ring speed by the switch. To return to switch control from a MIB-overridden Ring Speed setting: 1. Regain switch control. Regardless of the actual desired ring speed, the user must toggle the switch out of its current position and then reset the STHI to put a switch-position change into effect, cancelling the MIB override. 2.
Operating Specifications 2.2.7 Computing Hardware Operating System Memory: Internal Processor: Non-Volatile RAM: EPROM: FLASH MEMORY: 2.2.8 Intel i960 operating at 16 MHz 128 KB with battery back-up 128 KB 1 MB Environmental Requirements Operating Temperature: Non-operating Temperature: Operating Humidity: 2.2.9 2.0 MB +5° to +50° C fluctuation ≤ 10° per hour -30° to +90° C 5 to 95% (non-condensing) Physical Specifications Dimensions: Predicted MTBF: (mean time between failure) 2.8 H x 17.0 W x 8.
CHAPTER 3 Installation This chapter outlines the procedure for installing the STHI. Confirm that the network meets the guidelines and requirements outlined in Chapter 2, 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.
Installing the STHI 3.1.2 Stacking the STHI The rear panel of the STHI has four STACK ports exclusively reserved for connections to STH modules. Refer to the STH manual for stacking instructions. 3.1.
Installing the STHI Rack Mounting Brackets (2) HubSTACK TOKEN RING HUB WITH LANVIEW® SUPPORTING 100 OHM UTP CABLE STHI-24 24X CPU 4M 16M 16 Mb/s RESET SPEED 23X 22X 21X 20X 19X 18X 17X 16X 11X 10X 9X 8X 7X 6X 5X 4X 15X 14X 13X ACT MGMT COM RO 12X 3X 2X RI 1X Screws (4) Figure 3-2. Installing the Rack-Mount Brackets 3.
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. WARNING Potential SHOCK HAZARD: Select a wall location where pilot holes for screws will not intersect with electrical wiring in the wall. 3. Get a pencil and refer to Figure 3-5.
Installing the STHI Solid Wall Anchor Wall-Mounting Bracket attached to STHi Mounting Screws Pre-Drilled Holes with Anchors Hollow Wall Anchor Figure 3-5. Wall-mounting the STHI 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. 21 IN. 18 IN.
TPIM Installation 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. 3.2 TPIM Installation TPIM use is an option, not a requirement, for STHI operation. ! CAUTION Electrostatic Discharge (ESD) can damage the TPIM. Observe all precautions to prevent electrostatic discharges when handling the TPIM.
CHAPTER 4 Troubleshooting This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. 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.
Trouble Resolution Table 4-1. LANVIEW LED Signals (Continued) LED Color Ports off Green Condition Port enabled but not linked. Port enabled and linked. Red Port disabled (or set to Ring Out) and not linked. blinking Red Ring Speed Fault -OR- Port linked but disabled. 4.2 Trouble Resolution If this section does not guide the user to a solution, please contact Cabletron Systems Technical Support (see Section 1.4, Getting Help.
The Reset Button Management Failure 4 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. 4.3 The Reset Button The STHI incorporates a recessed Reset button (see Figure 4-1).
NVRAM Reset Switch 4.4 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.
CHAPTER 5 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. NOTE Users wishing to skip instructions for connecting a management terminal to the STHI may proceed directly to Section 5.2 for instructions regarding the use of LM.
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. Refer to terminal’s manual for more instructions if necessary. Table 5-1.
Accessing LM 5.1.2 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. 5.1.3 Entering LM After configuring the LM terminal and properly attaching the cable to the STHI, the user may access the Local Management interface. 1. Activate the console: power up the terminal, or run the emulator program.
Using LM Screens bottom line of the screen, then the Main Menu screen shown in Figure 5-2 appears. Event Message Line Flash Image Version: 1.00.00 STHI LOCAL MANAGEMENT Screen Title Line MAIN MENU DEVICE SETUP DEVICE STATUS DEVICE STATISTICS SNMP TOOL Menu Items or Fields EXIT LM Screen Commands Line Field Sensitive Help Line Figure 5-2.
Using LM Screens Setting or Modifying Fields 2 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. 2. Set the new value: With toggle fields (those that appear in square brackets), use the Return key to scroll through to the desired option. There are two edit methods available in each editable field.
Using LM Screens 5.2.2 Screen Hierarchy Figure 5-3 illustrates the organization of the entire LM screen system. Password Screen Main Menu SNMP Tool Device Statistics Component Status Chassis Status Device Status SNMP Traps SNMP Community Names System Level Device Setup Figure 5-3. LM Screen Hierarchy The Main Menu screen offers access to the Device Setup screen, the Device Status screen, the Device Statistics screen, and the SNMP Tool screen. 5.2.
Using LM Screens SNMP Traps 3 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 4 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.
The System Level Screen 5.3 The System Level Screen Access the System Level screen (Figure 5-4) from the Device Setup menu. STHI LOCAL MANAGEMENT Flash Image Version: 1.00.00 SYSTEM LEVEL System Date: SNMP Agent 06/15/10 IP Address 134.141.143.141 System Time: 13:08:00 Subnet Mask 255.255.0.
The System Level Screen 5.3.3 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; Network Management Stations (NMS) within the STHI hub’s own subnet are addressed directly.
The System Level Screen 5.3.5 Enable Beacon Recovery This field allows the user to enable or disable the STHI’s Advanced Beacon Recovery Process (ABRP). Beaconing is part of a standard IEEE 802.5 Token Ring process by which a Token Ring LAN attempts to recover from cable or hardware problems by automatically locating and bypassing the fault, thereby restoring network communications without operator intervention. Networks that rely upon the IEEE standard beaconing process are disabled when beaconing fails.
The SNMP Community Names Screen Retry Interval 2 The Retry Interval field determines the duration between automatic retries of RI/RO ports disabled by ABRP. Intervals are selectable to a resolution of 7 seconds between ring port retry attempts. The default setting is 21. 5.3.6 MAC Address This read-only field displays the Media Access Control (MAC) address which, by universal default, identifies the hub at the network’s physical layer. 5.3.
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. Each name set in these fields will be accorded the security access level named on the same line to the right, in the Access Policy column. 5.4.
The SNMP Traps Screen 5.5 The SNMP Traps Screen Access the System Level screen (Figure 5-6) from the Device Setup menu. STHI LOCAL MANAGEMENT Flash Image Version: 1.00.00 SNMP TRAPS Trap Destination 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 Trap Community Name SAVE Enable Traps N N N N N N N N RETURN Figure 5-6.
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 5 STH24 Multiplexer Line |---> Ring Speed Line 16Mb/s 1 BYP 2 INS 3 ENB 4 INS 5 LNK Port Fields 6 INS 7 ENB 8 ENB 9 INS 10 INS 11 INS 12 ENB NEXT [ Flash Image Version: 1.00.
The Chassis Status View Screen • OPERATIONAL (read-only) lists each port’s operational status. • ADMINISTRATIVE allows the user to enable/disable ports and to place entire hubs in bypass mode. • RING OUT ENABLE allows the user to set TCU ports to station or Ring Out operational configurations. The roles of these modes are discussed further in the following sections regarding port fields and multiplexer fields.
The Chassis Status View Screen <–B–> Attached left/right & Bypassed - This STH is bypassed from the stack’s common ring. The ring connection is continued by neighbor hubs in both directions. |–––> Attached right - This STH is connected to the stack’s common ring. The ring connection is continued by a neighbor hub to the right. |–B–> Attached right & Bypassed - This STH is bypassed from the stack’s common ring. The ring connection is continued by a neighbor hub to the right.
The Chassis Status View Screen Each port field (whether TPIM or TCU) may be set as follows: ON The port is enabled and will allow insertion. OFF The port is disabled. STHI LOCAL MANAGEMENT Flash Image Version: CHASSIS STATUS VIEW 5 STH24 |---> 16Mb/s 1 [OFF] 2 [ON] 3 [ON] 4 [ON] 5 [OFF] 6 [ON] 7 [ON] 8 [ON] 9 [ON] 10 [ON] 11 [ON] 12 [ON] NEXT 1.00.
The Chassis Status View Screen RING OUT ENABLE Mode 2 With the Chassis Status View screen in RING OUT ENABLE mode (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 5 STH24 |---> 16Mb/s 1 [STN] 2 [RO] 3 [STN] 4 [STN] 5 [STN] 6 [RO] 7 [STN] 8 [STN] 9 [RO] 10 [RO] 11 [RO] 12 [STN] NEXT Flash Image Version: 1.00.
The Chassis Status View Screen OPERATIONAL Mode 3 In OPERATIONAL mode (Figure 5-7), the Chassis Status View screen is 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 5 STH24 |---> 16Mb/s 1 BYP 2 INS 3 ENB 4 INS 5 LNK 6 INS 7 ENB 8 ENB 9 INS 10 INS 11 INS 12 ENB NEXT [ Flash Image Version: 1.00.
The Component Status Screen 5.6.4 NEXT and PREVIOUS The Chassis Status View screen lists ports in ranges of 12 at a time. Use the NEXT and PREVIOUS screen commands to view ports from the next or previous range. 5.6.5 ENABLE ALL PORTS Invoke this screen command to enable all ports in the stack. It is available only in ADMINISTRATIVE mode. 5.6.6 REFRESH The user may toggle this screen command to select screen refresh intervals from 3 to 10 seconds. 5.
The Device Statistics Screen components, whether optionally available or included with the 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: • Chassis Mgr - the entity that controls the interconnections between the hubs in the stack managed by the STHI. • Local Mgmt - the Local Management application. • SNMP Agent - the entity for the SNMP management agent.
The Device Statistics Screen This read only screen enables the user to monitor the performance of the managed network. The error statistics provided here can be useful in the diagnosis of LAN problems. The counters are updated at each screen refresh. 5.8.1 Screen Mode The screen operates under three different counting modes, described below. The screen mode currently in effect is listed in parentheses on the screen title line. The remaining two modes-in-waiting are listed on the screen command line.
The Device Statistics Screen 5.8.3 General Counter Fields (Group 1) Frames Received 1 This displays the number of frames received by the STHI. KBytes Received 2 This displays the amount of data (in kilobytes) received by the STHI. Errors Received 3 This displays the number of Isolating and Non-Isolating Errors (described below) detected on the ring. Beacon States 4 This displays the number of beacon conditions detected on the ring.
The Device Statistics Screen Ring Status 2 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. • Unknown — This reflects a transient state during which the management agent is unable to determine the current ring status.
The Device Statistics Screen 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. While they will not completely halt a network, excessive soft errors reduce a network’s efficiency.
The Device Statistics Screen Internal Errors 5 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.
The SNMP Tool Screen Token Errors 4 A Token Error may indicate that an active monitor either has detected a recirculating frame or token, or has found that its Timer Valid Transmission (TVX) time has expired before any token has been detected circulating on the ring (i.e.: a lost frame error has occurred). The active monitor is responsible for purging the ring and issuing new tokens in response to these errors.
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. On the SNMP Tool screen, a row of MIB commands is presented.
The SNMP Tool Screen 3. • 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. • Press F9 to recall the last-specified OID, and then edit that OID as desired. Press the Return key.
The SNMP Tool Screen 5.9.6 WALK WALK functions like an automatically repeating STEP, rapidly scrolling through a MIB leaf by leaf from a user-specified OID without requiring the user to initiate each step. WALK steps continuously until either the user stops the process or the list ends. 1. Invoke WALK by the on-screen selection method. 2. After “ OID (=|F9)” appears, specify an OID from which to begin walking, and press the Return key. The screen will begin walking through the MIB’s sublayers.
The SNMP Tool Screen 2. After “ OID (=|F9)” appears, specify an OID by the same methods used in the GET procedure: 3. Press the Return key. If there is no instance of that OID, “MIB NO INSTANCE” will appear; otherwise “DATA TYPE:” appears. 4. Designate a data type for the OID: integer, string, null, OID, IP address, counter, gauge, timeticks, and opaque are the available options. (Refer to the MIB for proper data type.) Press the Return key to accept the designation. 5.
The SNMP Tool Screen • ctDLCommitRAMtoFlash - 1.3.6.1.4.1.52.4.1.5.8.1.2.0 Cabletron’s Download Commit RAM to Flash OID determines whether the downloaded image will be committed to Flash memory after a successful download. Set this integer value to 1 to commit the downloaded image to Flash (or 0 to disable). If not committed to Flash, the downloaded file will be lost at power-down. • ctDLTFTPRequest - 1.3.6.1.4.1.52.4.1.5.8.1.5.
APPENDIX A TPIM Specifications A.1 Overview Token Ring Port Interface Modules (TPIMs) are media adapter cards which extend network connections onto a variety of media. When installed into Ring In and Ring Out ports, TPIMs support the expansion of a Token Ring from the host module into other devices. Each TPIM has a different type of cable port to support a different media connection. Table A-1 lists each available Cabletron Systems TPIM and its respective connector. Table A-1.
Fiber Optic TPIM Specifications TPIM-T1 TPIM-T2 and TPIM-T4 12345678 5 4 3 2 1 LNK 9 8 7 LNK 6 TPIM-T1 1. Receive + 2. Ground 3. +5V at 250 mA 4. Ground 5. Transmit 6. Receive 7. Ground 8. Ground 9. Transmit + TPIM-T4 1. Not Used 2. Not Used 3. Transmit 4. Receive + 5. Receive 6. Transmit + 7. Not Used 8. Not Used Figure A-1. TPIM-T1/T2/T4 Pinouts for Ring In. TPIM-T1 TPIM-T2 and TPIM-T4 12345678 5 4 3 2 1 LNK 9 8 7 LNK 6 TPIM-T1 1. Transmit + 2. Ground 3. +5V at 250 mA 4.
Fiber Optic TPIM Specifications RX TX LNK TPIM-F2 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 Value Worst Case Worst Case Budget Typical Budget Receive Sensitivity -30.5 dBm -28.0 dBm — — Peak Input Power -7.6 dBm -8.2 dBm — — Parameter Transmitter Power: 50/125 µm -13.0 dBm -15.0 dBm 13.0 dB 17.5 dB 62.5/125 µm -10.0 dBm -12.0 dBm 16.0 dB 20.
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. For a 4°C temperature increase, multiply the typical coefficient (-0.15 dBm) by four and add the result to typical output power: (4 x -0.
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 10-10 The transmitter power levels given in Table A-3 are Peak Power Levels after optical overshoot. A Peak Power Meter is required to correctly compare the values given above to those measured on any particular port.
APPENDIX B 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.
Unshielded Twisted Pair (UTP) Table B-1. UTP Cable Category Specifications UTP Cat. Operating Frequency Electrical Impedance Signal Attenuation per 100m NEXT loss (@ ≥100m) 3 4 MHz ≤ 100Ω ±15% ≤ 5.6 dB ≥ 32 dB 16 MHz ≤ 100Ω ±15% ≤ 13.1 dB ≥ 23 dB* 4 MHz ≤ 100Ω ±15% ≤ 4.3 dB ≥ 47 dB 16 MHz ≤ 100Ω ±15% ≤ 8.9 dB ≥ 38 dB 4 MHz ≤ 100Ω ±15% ≤ 4.3 dB ≥ 63 dB 16 MHz ≤ 100Ω ±15% ≤ 8.2 dB ≥ 44 dB 4 5 *below Token Ring performance requirement of ≥ 30.5 dB.
Shielded Twisted Pair (STP) Table B-2. UTP Maximum Lobe Lengths. @ 4 Mbps UTP Category @ 16 Mbps meter s (feet) meter s (feet) 3 200 (656) 100* (328)* 4 225 (738) 110 (360) 5 250 (820) 120 (393) * for cable with NEXT loss ≥ 30.5 dB per 100m Some UTP category 3 cables fail to meet the performance minimums required to support a Token Ring network.
Shielded Twisted Pair (STP) Table B-3. STP Cable Type Specifications. Attenuation per... IBM Type Operational Frequency Impedance 1&2 4 MHz 6&9 1000 m (1000 ft) ≤ 150Ω ±15% ≤ 22 dB (≤ 6.7 dB) 16 MHz ≤ 150Ω ±15% ≤ 45 dB (≤ 13.7 dB) 4 MHz ≤ 150Ω ±15% ≤ 33 dB (≤ 10.0 dB) 16 MHz ≤ 150Ω ±15% ≤ 66 dB (≤ 20.0 dB) 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.
Single Mode and Multimode Fiber Optic Cabling Table B-4. STP Maximum Lengths IBM Type Max. Lobe Length Max. Drive Distance 4 Mbps 16 Mbps 4 Mbps 16 Mbps 1&2 200 meters (660 feet) 100 meters (300 feet) 770 meters (2525 feet) 346 meters (1138 feet) 6&9 30 meters (99 feet) 30 meters (99 feet) 513 meters (1683 feet) 230 meters (755 feet) B.3 Single Mode and Multimode Fiber Optic Cabling TPIM models F2 and F3 support multimode and singlemode fiber optic cable respectively.
