Cabletron Systems MICROMMAC 24T, MICROMMAC-22T, MICROMMAC 42T, MICROMMAC 44T User Manual

MICROMMAC-22T/24T/42T/44T
STA CKABLE T OKEN RING
INTELLIGENT HUBS
USER’S GUIDE
per
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.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
© Copyright March 1996 by: Cabletron Systems, Inc. P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved Printed in the United States of America Order Number: 9031320 March 1996 MicroMMAC-22T , 24T , 42T, 44T, BRIM, and TPIM are trademarks of Cabletron Systems,
Inc. SPECTRUM, LANVIEW, and Remote LANVIEW are registered trademarks of Cabletron
Systems, Inc. IBM is a registered trademark of International Business Machines Corporation. DEC, VT200, and VT300 are trademarks of Digital Equipment Corporation. CompuServe is a trademark of Compuserve, Inc.
Printed On
Recycled Pa
iii
NOTICE
FCC NOTICE
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. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user’ s authority to operate the equipment.
DOC NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.
VCCI NOTICE
This equipment is in the 1st Class Category (information equipment to be used in commercial and/or industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial and/or industrial areas.
Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be caused to radios and TV receivers, etc.
Read the instructions for correct handling.
iv
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NOTICE
CABLETRON SYSTEMS, INC. PROGRAM
LICENSE AGREEMENT
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. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE TERMS OF THIS A GREEMENT , PR OMPTL Y RETURN THE UNUSED PRODUCT T O THE PLACE OF PURCHASE FOR A FULL REFUND.
CABLETRON SOFTWARE PROGRAM LICENSE
1. LICENSE. 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. O
THER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble
the Program.
3.
APPLICABLE LAW. This License Agreement shall be interpreted and governed under the laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and venue of the New Hampshire courts.
Y ou have the right to use only the one (1) cop y of the Program provided in
EXCLUSION OF WARRANTY AND DISCLAIMER
OF LIABILITY
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CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABLITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
WARRANTY. Except as may be specifically provided by
v
NOTICE
2. NO LIABILITY FOR CONSEQ CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMA GES, OR O THER LOSS) ARISING OUT OF THE USE OR IN ABILITY T O USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTEES IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.
UENTIAL DAMAGES. IN NO EVENT SHALL
UNITED STATES GOVERNMENT RESTRICTED
RIGHTS
The enclosed product (a) was developed solely at pri vate 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.
For Department of Defense units, the product is licensed with “Restricted Rights” as defined in the DoD Supplement to the Federal Acquisition Regulations, Section
52.227-7013 (c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way. Rochester, New Hampshire 03866
vi

CONTENTS

CHAPTER 1 INTRODUCTION
1.1 CONTENTS OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.2 MicroMMAC-T OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.3 MicroMMAC-T FEATURES . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.4 STACKABLE CAPABILITIES . . . . . . . . . . . . . . . . . . . . . . .1-8
1.5 BRIDGING/ROUTING CAPABILITIES. . . . . . . . . . . . . . . .1-9
1.5.1 SNA/WAN Integration. . . . . . . . . . . . . . . . . . . . . .1-10
1.6 REMOTE MANAGEMENT CAPABILITIES . . . . . . . . . . .1-10
1.7 TELNET CAPABILITIES . . . . . . . . . . . . . . . . . . . . . . . . .1-10
1.8 RECOMMENDED READING. . . . . . . . . . . . . . . . . . . . . .1-11
1.9 GETTING HELP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
CHAPTER 2 REQUIREMENTS/SPECIFICATIONS
2.1 CABLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.1.1 UTP Cable Specifications . . . . . . . . . . . . . . . . . . .2-2
2.1.2 STP Cable Specifications. . . . . . . . . . . . . . . . . . . .2-4
2.1.4 Single Mode Fiber Optic Cable Specifications. . . .2-7
2.2 CABLE RECOMMENDATIONS/TROUBLESHOOTING . .2-8
2.3 COM PORT SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . .2-9
2.4 TPIM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2-10
2.5 GENERAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . .2-15
2.5.1 Power Supply Requirements . . . . . . . . . . . . . . . .2-16
2.5.2 Environmental Requirements. . . . . . . . . . . . . . . .2-16
2.5.3 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
2.5.4 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
2.5.5 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17
CHAPTER 3 INSTALLATION
3.1 UNPACKING THE MicroMMAC-T . . . . . . . . . . . . . . . . . . .3-1
3.2 ATTACHING THE STRAIN RELIEF BRACKET . . . . . . . . .3-1
3.3 INSTALLING THE MicroMMAC-T . . . . . . . . . . . . . . . . . . .3-2
3.3.1 Rack-Mounting the MicroMMAC-T. . . . . . . . . . . . .3-2
3.3.2 Wall-Mounting the MicroMMAC-T . . . . . . . . . . . . .3-3
3.3.3 Free-Standing Installation . . . . . . . . . . . . . . . . . . .3-5
3.4 CONNECTING TO A POWER SOURCE. . . . . . . . . . . . . .3-5
vii
CONTENTS
3.5 RESETTING THE MICROMMAC-T. . . . . . . . . . . . . . . . . . 3-5
3.6 SETTING THE RING SPEED . . . . . . . . . . . . . . . . . . . . . .3-6
3.7 SETTING THE NVRAM SWITCH . . . . . . . . . . . . . . . . . . .3-7
3.8 CONNECTING LOBE PORT CABLING . . . . . . . . . . . . . .3-8
3.9 INSTALLING TPIM MODULES . . . . . . . . . . . . . . . . . . . . 3-12
3.9.1 Setting Phantom and RI/RO Switches. . . . . . . . . 3-13
3.9.2 TPIM Installation . . . . . . . . . . . . . . . . . . . . . . . . .3-14
3.9.3 Connecting STP Segments . . . . . . . . . . . . . . . . .3-15
3.9.4 Connecting Twisted Pair Segments . . . . . . . . . . .3-16
3.9.5 Connecting Fiber Optic Link Segments . . . . . . . . 3-17
3.10 CHECKING THE INSTALLATION . . . . . . . . . . . . . . . . . .3-19
CHAPTER 4 LOCAL MANAGEMENT
4.1 MANAGEMENT TERMINAL REQUIREMENTS . . . . . . . .4-1
4.1.1 Attaching the Management Terminal . . . . . . . . . . .4-2
4.1.2 Management Terminal Setup Parameters . . . . . . .4-2
4.1.3 Modem Cable Configuration and Setup. . . . . . . . .4-3
4.2 ACCESSING LOCAL MANAGEMENT . . . . . . . . . . . . . . .4-4
4.2.1 Accessing Local Management via Telnet. . . . . . . .4-5
4.2.2 Accessing Local Management from a Modem. . . .4-6
4.3 USING LOCAL MANAGEMENT . . . . . . . . . . . . . . . . . . . .4-6
4.3.1 Working with Local Management Screens. . . . . . .4-7
4.3.2 The SYSTEM LEVEL Screen . . . . . . . . . . . . . . . . 4-9
4.3.3 The SNMP COMMUNITY NAMES Screen . . . . .4-15
4.3.4 The SNMP TRAPS Screen . . . . . . . . . . . . . . . . .4-17
4.3.5 The RING SECURITY Screen. . . . . . . . . . . . . . . 4-18
4.3.6 The DEVICE STATISTICS Screen. . . . . . . . . . . . 4-23
4.3.7 The CHASSIS STATUS VIEW Screen. . . . . . . . . 4-28
4.3.8 The COMPONENT STATUS Screen . . . . . . . . . .4-35
4.3.9 The MIB NAVIGATOR Screen . . . . . . . . . . . . . . .4-36
4.3.10 The FLASH DOWNLOAD Screen . . . . . . . . . . . .4-40
CHAPTER 5 TROUBLESHOOTING
5.1 USING LANVIEW LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 USING THE LCD DISPLAY . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.2.1 Static System Messages . . . . . . . . . . . . . . . . . . . .5-3
5.2.2 Alarm Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2.3 Unsaved Initialization Messages . . . . . . . . . . . . . .5-5
viii
CONTENTS
5.2.4 Saved System Messages. . . . . . . . . . . . . . . . . . . .5-6
5.3 VIEWING POWER UP DIAGNOSTIC TESTS. . . . . . . . . .5-7
ix
CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems
-44T Stackable Token Ring Intelligent Hub User’s Guide
MicroMMAC-22T/-24T/-42T/
. This manual provides installation instructions, network requirements, reference information, and operating instructions for the MicroMMAC-T (Figure 1-1) family of stackable hubs. Installing the MicroMMAC-T requires familiarity with the physical layer components of Token Ring (IEEE
802.5) data communications networks.
NOTE
: Unless otherwise specified, this manual uses the term MicroMMAC-T to collectively refer to the MicroMMAC-22T, the MicroMMAC-24T, the MicroMMAC-42T, and the MicroMMAC-44T.
MicroMMAC-24T
LCD
16M4M
RESET
DISPLAY
SPEED
TOKEN RING HUB
SUPPORTING 100 OHM UTP CABLE
CPU
16 Mb/s
COM 1COM 2
WITH
LANVIEW®
TPIM
Ring Out
ACT
MGMT
RO
Slot
Figure 1-1. The MicroMMAC-T
.
24 23 22 21 20 19
TPIM
12 11 10 9 8 7
18 17 16 15 14 13
RI
6 5 4 3 2 1

1.1 CONTENTS OVERVIEW

This manual contains the following information: Chapter 1,
Introduction
, outlines the contents of this manual and describes features of the MicroMMAC-T and its add-on components. It also lists sources where more information on Token Ring network implementation can be found.
Chapter 2,
Requirements/Specifications
, describes cabling requirements,
network guidelines, and MicroMMAC-T operating specifications. Chapter 3,
Installation,
contains MicroMMAC-T installation instructions and discusses network connections using various media types. This chapter includes instructions for setting the Ring Speed Switch, the Reset Switch, the NVRAM Switch, and the TPIM Phantom Switch. It also
1-1
INTRODUCTION
describes how to install a TPIM and concludes with installation check-out instructions.
Chapter 4,
Local Management
, explains how to set up and use a
management terminal and a modem to access Local Management. Chapter 5,
Troubleshooting
, explains how to monitor the operation
performance of the MicroMMAC-T using LANVIEW® LEDs and LCD’ s. It also explains how to access POWER UP diagnostic test information.

1.2 MicroMMAC-T OVERVIEW

The MicroMMAC-T is an intelligent, stackable Multi-Media Access Center providing connectivity and SNMP management for up to 255 Token Ring users (Local Management for up to 120 Token Ring users) in remote office environments. The MicroMMAC-T can be used in conjunction with Cabletron’s STH HubSTACK series of stackable non-intelligent hubs.
Figure 1-2 illustrates a typical MicroMMAC-T configuration scenario. Attachable Bridge/Routing Interface Modules (BRIMs), incorporated as seamless entities within the MicroMMAC-T , provide connecti vity not only to standard Token Rings but also to Ethernet, FDDI, ATM, and WAN environments, depending upon the BRIM types used.
T oken Ring Port Interface Modules (TPIMs) attachable at the Ring In/Ring Out (RI/RO) ports provide connecti vity and expanded trunk connections to a range of Token Ring media: Unshielded Twisted Pair (UTP), Shielded Twisted Pair (STP), and Fiber.
By installing Cabletron’s MicroSNAC daughterboard in the MicroMMAC-T, you can consolidate SNA/SDLC, BSC, LAN, and WAN connectivity into a single unit.
T elnet support provides easy access to Local Management tools from any TCP/IP based node on the network.
The MicroMMAC-T complies with the IEEE 802.5 standard and is fully IBM Token Ring compatible. The remainder of this chapter discusses MicroMMAC-T features in greater detail.
1-2
INTRODUCTION
TOKEN RING
Telnet
UTP
WORKSTATION
Figure 1-2. Typical MicroMMAC-T Configuration Scenario
SDLC
All MicroMMAC-Ts are functionally and physically identical except for the number and type of their Trunk Connection Unit (TCU) lobe ports. The following MicroMMAC-T configurations are available:
MicroMMAC-22T
: twelve active RJ45 TCU lobe ports that support
category 3, 4, and 5 UTP cabling.
MicroMMAC 24T
: twenty-four active RJ45 TCU lobe ports that
support category 3, 4, and 5 UTP cabling.
MicroMMAC-42T
: twelve active RJ45 TCU lobe ports that support
IBM Type 1, 2, 6, and 9 STP cabling.
MicroMMAC-44T
: twenty-four active RJ45 TCU lobe ports that
support IBM Type 1, 2, 6, and 9 STP cabling.

1.3 MicroMMAC-T FEATURES

NOTE
: Call your Cabletron Sales representative to order the 12-port upgrade kit, the MicroSNAC device, BRIMs, TPIMs, interface cables, and other accessories for the MicroMMAC-T.
1-3
INTRODUCTION
Active TCU Ports
The active TCU ports regenerate, reshape, and filter the incoming signal, permitting UTP lobe cable lengths of up to lengths up to
150 meters
at 16 Mbps ring speed. The MicroMMAC-22T
120 meters
and STP lobe cable
and the MicroMMAC-42T can be upgraded in the field using the Cabletron UTP and STP 12-port upgrade kits.
Cable Signal Polarity
Differential Manchester encoding is used for each concentrator module TCU port. This permits passing data regardless of receive link polarity.
NOTE
: The MicroMMAC-T is not affected by the reversed polarity condition. If, however, such a condition is discovered, the segment should be removed fr om the network and wired corr ectly to avoid problems during future network operations. Refer to Section 3.8 for cable pinouts specifications
Speed Fault Protection
If a station attempts to insert into a ring port at a different speed from the one set on the MicroMMAC-T, that port is automatically bypassed to prevent the ring from beaconing. The Lobe Port Status LED blinks red (for more information, see Section 5.1, USING LANVIEW LEDs) to indicate that the port with the speed fault is being bypassed.
Local Management
Local Management provides you with the ability to manage the MicroMMAC-T and all of its attached segments, including most BRIMs and the MicroSNAC device. The CR BRIM-W/T and the MicroSNAC provide their own configuration firmware.
Access Local Management by connecting an actual or emulated Digital Equipment Corporation VT100™ series terminal to the MicroMMA C-T’s COM 1 port or the COM 2 port. To view diagnostic test information from a display terminal, use the COM 2 port.
Token Ring Port Interface Modules (TPIMs)
TPIMs are modular connector cards used for expanding trunk connections to a range of Token Ring media. TPIMs have embedded repeaters that
1-4
INTRODUCTION
re-time all data. Cabletron offers a variety of TPIMs for RI/RO trunk connections as shown in Table 1-1.
Table 1-1. TPIMs
TPIM Media T ype Connector
TPIM-T1 Shielded T wisted Pair DB9 TPIM-T2 Unshielded T wisted Pair RJ45 TPIM-T4 Shielded T wisted Pair RJ45 TPIM-F2 Multimode Fiber Optic ST TPIM-F3 Single mode Fiber Optic ST
Ring Speed Switch
Use the Ring Speed Switch to select either 4 or 16 Mbps ring speed.
Flash EEPROM
The firmware image on the MicroMMAC-T can be upgraded by Flash EEPROM downloads via Cabletron System’s Remote LANVIEW/Windows version 2.3 or later, or via any server supporting BOOTP or TFTP protocols.
LANVIEW LEDs
Cabletron Systems’ LANVIEW LEDs, located on the face of the MicroMMAC-T, provide an effective monitoring and troubleshooting tool to help diagnose power failures, RI/R O status, cable faults, ring speed, link problems, and network activity. See Section 5.1 for information about using LEDs.
Cabletron’s Distributed LAN Monitor Mode
To manage a network that includes multiple subnets, remote network management stations need to query multiple management devices, increasing the data traffic on the network. Network managers can reduce the amount of management related traffic by setting the MicroMMAC-T into Distributed LAN Monitor mode via a remote management package. The MicroMMAC-T in DLM mode will collect management data from the
1-5
INTRODUCTION
numerous management devices and serve as their management data representative. The network management station then has to query only one management device, the MicroMMAC-T in DLM mode, to access management data for all management devices on the network.
Consult your network manager for DLM setup.
COM Port Applications
Both of the front panel COM ports are factory-configured to support Local Management connections. Select among configuration options for Local Management, Uninterruptible Power Supplies (UPS), the Serial Line Internet Protocol (SLIP), and modems.
LCD and LCD Display Button
MicroMMAC-T’s front panel LCD used in conjunction with the LCD display button provides you with comprehensiv e system-lev el information such as power-up diagnostics, FLASH image re vision levels, IP addresses, and error alerts. See Section 5.2 for more information.
Reset Button
The Reset button on the front panel initializes the processor when pressed. The information contained in NVRAM is retained after initialization. See Section 3.5 for more information.
MIB Support
The MicroMMAC-T provides access to the following Management Information Bases:
Standard MIBs
MIB-2 (RFC 1231)
IEEE RMON MIB (RFC 1271)
RMON Extensions for Token Ring (RFC 1513) Cabletron Enterprise MIBs
Download
MIB-II Extensions
1-6
INTRODUCTION
Token Ring FNB (Flexible Network Bus)
DOT 5 Logical and Physical
UPS (Uninterruptible Power Supply)
Device
DLM (Distributed LAN Monitor)
PIC MIB (Product Information Chip MIB)
Chassis MIB
RMON MIB Support
The MicroMMAC-T supports the RMON MIB RFC 1271/1513 Token Ring Extensions shown in Table 1-2.
Table 1-2. RMON MIB RFC 1271/1513 Support
Group Subgroup Section
Statistics rmon 1 History rmon 2
Alarm rmon 3 Host rmon 4
HostTopN rmon 5 Matrix rmon 6
Token Ring ML Stats Table Token Ring P Stats Table History Control Table Token Ring ML History Table Token Ring P History Table Alarm T able alarm 1
Host Control Table Host T able Host Time Table HostTopN Control Table HostT opN Table Matrix Control Table Matrix SD Table Matrix DS Table
statistics 2 statistics 3 history 1 history 3 history 4
hosts 1 hosts 2 hosts 3 hostTopN 1 hostTopN 2 Matrix 1 Matrix 2 Matrix 3
1-7
INTRODUCTION
Table 1-2. RMON MIB RFC 1271/1513 Support (Cont.)
Group Subgroup Section
Event rmon 9 Token Ring rmon 10
Event Table Log T able Ring Station Control Table Ring Station Table Ring Station Order Table Ring Station Config Control Table Ring Station Config Table Source Routing Stats Table
event 1 event 2 Token Ring 1 Token Ring 2 Token Ring 3 Token Ring 4 Token Ring 5 Token Ring 6

1.4 STACKABLE CAPABILITIES

The MicroMMAC-T can be stacked with up to four HubSTACK STH series non-intelligent hubs as shown in Figure 1-3. Four connectors are available on the back panel of the MicroMMAC-T for connecting STH 12/24 type non-intelligent hubs. The MicroMMAC-T provides complete management, including full packet and error statistics for the entire stack, individual device, or individual port.
It is not necessary to power-of f the MicroMMA C-T to add or remove hubs from the stack.
1-8
REAR VIEW MicroMMAC Managing 4 Non-Intelligent Hubs
HubSTACK STH-24
RESERVED
STACK
HubSTACK STH-24
RESERVED
STACK
HubSTACK STH-24
STACK
RESERVED
HubSTACK STH-24
RESERVED
STACK
INTRODUCTION
MicroMMAC-24T
TOKEN RING HUB
WITH
LANVIEW®
BRIM Slot
STACK5STACK4STACK3STACK2
Figure 1-3. Typical Stackable Configuration
NOTE
: Token Ring HubSTACK Interface cables, which are used to connect between the MicroMMAC-T and stacked STH hubs, are not included with the MicroMMAC-T.

1.5 BRIDGING/ROUTING CAPABILITIES

A slot on the back panel of the unit provides installation access for BRIMs to the hub. MicroMMA C-T management systems treat the installed BRIM and the hub as a single entity. Cabletron offers the BRIMs listed in Table 1-3.
1-9
INTRODUCTION
.
Table 1-3. BRIMs
BRIM Description
BRIM-E6 Ethernet Connection BRIM-W6 Wide Area Network (Full or Fractional T1; 56k DDS) BRIM-A6 Asynchronous Transfer Mode Connection BRIM-T6 Token Ring Connection CR BRIM-W/T Cisco WAN BRIM for Token Ring BRIM-FO Fiber Distributed Data Interface Connection

1.5.1 SNA/WAN Integration

The MicroSNA C add-on daughterboard provides two ports, both of which can be used to provide conv ersion from SNA/SDLC or BSC links to LLC2. The MicroSNAC can operate in a converter mode or as a WAN concentrator.

1.6 REMOTE MANAGEMENT CAPABILITIES

The MicroMMAC-T may be managed through any Simple Network Management Protocol (SNMP) software. Cabletron Systems offers the following remote management packages:
Cabletron Systems SPECTRUM
®
Cabletron Systems Remote LANVIEW®/Windows™
®
Cabletron Systems Remote SPECTRUM
Portable Management
Applications

1.7 TELNET CAPABILITIES

The MicroMMAC -T supports Telnet, which allows any TCP/IP based node on the network to establish a Local Management session with the
1-10
INTRODUCTION
module. This feature complements the remote SNMP management and allows for quick hub configuration changes or checks.

1.8 RECOMMENDED READING

The following publications provide more information on Token Ring network implementation.
Local Area Networks, Token Ring Access Method
, IEEE Standard 802.5
(1989)
Commercial Building Wiring Standard, EIA/TIA-568 LAN Troubleshooting Handbook
, Mark Miller (1989, M&T Publishing)

1.9 GETTING HELP

For additional support related to the Cabletron Systems MicroMMAC-T, or for any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support:
By phone. . . . . . . . . . . . . . . . . . (603) 332-9400
Monday-Friday; 8am - 8pm EST
®
By CompuServe
By Internet mail . . . . . . . . . . . . support@ctron.com
By BBS. . . . . . . . . . . . . . . . . . . (603) 337-3750
By mail . . . . . . . . . . . . . . . . . . . Cabletron Systems, Inc.
. . . . . . . . . . . GO CTRON from any ! prompt
P.O. Box 5005 Rochester, NH 03866-5005
1-11
CHAPTER 2

REQUIREMENTS/SPECIFICATIONS

Read this chapter prior to installing the MicroMMAC-T. It contains operating specifications and requirements for power and cabling. T o obtain satisfactory performance from this equipment, networks must meet the requirements and conditions specified in this chapter. Failure to follow these guidelines may result in poor network performance.

2.1 CABLE SPECIFICATIONS

Token Ring architecture provides for a set of Trunk Coupling Units (TCUs) connected by trunk cabling. To extend the trunk cabling, install TPIMs into the MicroMMAC-T’s RI/RO ports. TPIMs have embedded repeaters and provide trunk connections for UTP, STP, Multimode Fiber, and Single Mode Fiber cabling.
Attach stations to the TCU lobe ports with lobe cabling. Figure 2-1 shows a typical ports to cables configuration.
Ring Out TPIM
TOKEN RING HUB WITH LANVIEW®
MicroMMAC-24T
SUPPORTING 100 OHM STP CABLE
DISPLAY
16M4M
RESET
DISPLAY
SPEED
Lobe Cabling
ACT
CPU
MGMT
16 Mb/s
COM 1COM 2
RO
24 23 22 21 20 19
12 11 10 9 8 7
18 17 16 15 14 13
6 5 4 3 2 1
RI
TCU Lobe Ports
Token Ring Station
Ring In TPIM
TOKEN RING HUB WITH LANVIEW®
MicroMMAC-24T
SUPPORTING 100 OHM STP CABLE
ACT
CPU
DISPLAY
16M4M
MGMT
RESET
DISPLAY
16 Mb/s
SPEED
COM 1COM 2
RO RI
24 23 22 21 20 19
12 11 10 9 8 7
18 17 16 15 14 13
6 5 4 3 2 1
Figure 2-1. MicroMMAC-T Ports/Cables
Trunk Cabling
2-1
REQUIREMENTS/SPECIFICATIONS
2.1.1 UTP Cable Specifications
The MicroMMAC-22T and MicroMMAC-24T lobe ports and the TPIM-T2 support voice grade Unshielded Twisted Pair (UTP) cable, as described in specifications for EIA/TIA TSB 568 and IBM Type 3 cable.
UTP consists of four pairs of 24 AWG solid wire for data or voice communication and is typically used to wire cable runs within building walls. In some installations, existing UTP building wiring can be used for Token Ring cabling. UTP cable must conform to the limits shown in Table 2-1.
WARNING
: DO NOT connect UTP cabling to any non-Token Ring network conductors (telephone, etc.) or ground. If in doubt, test wiring before using. The voltages used in UTP telephone circuits present a shock hazard and can damage Token Ring equipment when connected to Token Ring cabling.
The increased popularity and cost advantages of UTP cable have driven refinements in UTP cable design. Better grades of UTP cable, known as supergrade or level 4, provide improved transmission characteristics and may allow operation at 16 Mbps on longer lobe cables.
Attenuation and Impedance
The values listed in Figure 2-1 include the maximum attenuation of the cables, connectors, patch panels, and reflection losses due to impedance mismatches in the segment.
Table 2-1. UTP Voice Grade and Category 3 Specifications
Frequency Impedance Attenuation
1 MHz 100 ±15% <26 dB/km (8 dB/1000 ft) 4 MHz 100 ±15% <56 dB/km (16 dB/1000 ft) 10 MHz 100 ±15% <98 dB/km (30 dB/1000 ft) 16 MHz 100 ±15% <131 dB/km (40 dB/1000 ft)
2-2
REQUIREMENTS/SPECIFICATIONS
Maximum Lobe Lengths
Lobe length is the physical length of the cable connecting a station to its TCU port at the MicroMMAC-T. Table 2-2 lists the maximum lobe cable length for ring speeds of 4 and 16 Mbps. The values listed refer to total lengths made up of UTP cable only.
Table 2-2. UTP Maximum Lobe Lengths
UTP Cable Type Maximum Lobe Length
4 Mbps 16 Mbps
Category 3 200 meters 100 meters
(656 feet) (328 feet)
Category 4 200 meters 100 meters
(656 feet) (328 feet)
Category 5 250 meters 120 meters
(820 feet) (394 feet)
Type 3 Media Filters
A Type 3 Media Filter is required when connecting a UTP lobe segment from a MicroMMAC-22T or MicroMMAC-24T to a station supporting STP cabling. Cabletron Systems offers the following T ype 3 Media Filters:
TRMF , RJ45 (UTP) connector to 10-inch DB9 (STP) cable with
LANVIEW
TRMF-2, RJ45 (UTP) connector to DB9 (STP) connector
Maximum Number of Stations
When UTP lobe cabling is used in any ring segment, the number of ring stations supported by the MicroMMAC-T is limited to 150, regardless of the operating ring speed.
2-3
REQUIREMENTS/SPECIFICATIONS
2.1.2 STP Cable Specifications
MicroMMACs 42T and 44T and TPIMs T1 and T4 support IBM Type 1, 2, 6, and 9 STP cabling as described below:
IBM T ype 1: Two STP lengths of 22 AWG solid wire for data. Used
for the longest cable runs within building walls of buildings.
IBM T ype 2: Similar to Type 1 data cable, but having four additional
UTP lengths of 22 AWG solid wire carried outside of the shield casing. Typically used for voice communication and often used to wire cable runs within the walls of buildings.
IBM T ype 6: Two STP lengths of 26 AWG stranded wire for data.
Used in patch panels or to connect devices to/from wall jacks. Attenuation for Type 6 cable is 3/2 x Type 1 cable (66 m of Type 6 =100 meters of Type 1).
IBM T ype 9: Similar to Type 1, but uses 26 AWG solid wire.
Attenuation for Type 9 cable is 3/2 x Type 1 cable (66 m of Type 9 = 100 meters of Type 1).
Attenuation and Impedance
The attenuation values shown in Table 2-3 include the attenuation of the cables, connectors, patch panels, and reflection losses due to impedance mismatches in the segment
Table 2-3. STP Cable Specifications
Types Frequency Impedance Attenuation
1 & 2 4 MHz
16 MHz
6 & 9 4 MHz
16 MHz
150 + 15% 150 + 15% 150 + 15% 150 + 15%
.
<22 dB/km (6.7 db/1000 ft.) <45 dB/km (13.7 db/1000 ft.) <33 dB/km (10 db/1000 ft.) <66 dB/km (20 db/1000 ft.)
Maximum Lobe Lengths
The lobe length is the physical length of the cable connecting a station to its TCU port at the MicroMMAC-T. Table 2-4 lists the maximum lobe
2-4
REQUIREMENTS/SPECIFICATIONS
cable length for ring speeds of 4 and 16 Mbps. The cable lengths listed in Table 2-4 refer to total lengths made up of STP cable only
Table 2-4. STP Maximum Lobe Lengths
STP Cable Type Ring Speed
IBM Types 1 & 2 300 meters 150 meters
IBM Types 6 & 9 (only for station to wall jack and patch panels)
.
4 Mbps 16 Mbps
(984 feet) (492 feet) 30 meters 30 meters (99 feet) (99 feet)
Maximum T runk Lengths
The maximum trunk cable length between the MicroMMAC-T and other active devices is equal to the maximum drive distance as shown in Table 2-5. For passive devices, the combined length of twice the longest trunk cable, plus the longest lobe cable attached to the passive ring segment cannot exceed the Maximum Drive Distance.
Table 2-5. STP Maximum Drive Distance
STP Cable Type Ring Speed
4 Mbps 16 Mbps
IBM Types 1 & 2 770 meters 346 meters
(2525 feet) (1138 feet)
IBM Types 6 & 9 513 meters 230 meters
(1683 feet) (755 feet)
Maximum Number of Stations
If only STP lobe cabling is used throughout the ring, the MicroMMAC-T supports up to 255 ring stations, regardless of ring speed.
2-5
REQUIREMENTS/SPECIFICATIONS
Mixed Cable Types
If multiple cable types exist in network, compensations must be made for the different cable attenuations. Type 6 and T ype 9 cables can run only 2/3 the distance of T ype 1. Therefore 10 meters of T ype 1 6.6 meters of T ypes 6 and 9.
2.1.3 Multimode Fiber Optic Cable Specifications
Table 2-6 shows specifications for the Multimode Fiber Optic Cable supported by TPIM-F2
Table 2-6. Multimode Fiber Optic Cable Specifications
Cable Type Attenuation Maximum Drive Distance
50/125 µm 13.0 dB or less
62.5/125 µm 16.0 dB or less 100/140 µm 19.0 dB or less
.
The maximum allowable fiber optic cable length is 2 km (2187.2 yards). However, IEEE
802.5 specifications allow for a maximum of 1 km (1093.6 yards).
Maximum T runk Lengths
The maximum trunk cable length between the MicroMMAC-T and other active devices is equal to the maximum drive distance as shown in Table 2-6. For passive devices, the combined length of twice the longest trunk cable, plus the longest lobe cable attached to the passive ring segment, must not exceed the Maximum Drive Distance Trunk Length.
Attenuation
Fiber optic cable must be tested with an attenuation test set adjusted for an 850 nm wavelength. This test ensures that a cable’s signal loss is within acceptable limits. Table 2-6 shows the attenuation for each Multimode cable type.
2-6
REQUIREMENTS/SPECIFICATIONS
Fiber Optic Budget
The fiber optic delay budget, which determines the fiber optic cable’s maximum length, should be calculated and taken into consideration in the network design stage. Fiber optic delay budget is determined by summing the optical signal loss due to fiber optic cable attenuation, in-line splices, and fiber optic connectors.
2.1.4 Single Mode Fiber Optic Cable Specifications
Table 2-7 shows specifications for the Single Mode Fiber Optic Cable supported by TPIM-F3.
Table 2-7. Single Mode Fiber Optic Cable Specifications
Cable Type Attenuation Maximum Drive Distance
8/125-12/125 µm 10.0 dB or less The max. allowable fiber optic
cable length is 10 km (10936 yards). However, IEEE 802.5 specs allow for a max. of 1 km (1093.6 yards).
Maximum T runk Lengths
The maximum trunk cable length between the MicroMMAC-T and other active devices is equal to the Maximum Drive Distance as shown in Table 2-7. For passive devices, the combined length of twice the longest trunk cable plus the longest lobe cable attached to the passive ring segment must not exceed the Maximum Drive Distance Trunk Length.
Attenuation
Fiber optic cable must be tested with an attenuation test set adjusted for a 1300 nm wavelength. This test ensures that the cable’ s signal loss is within an acceptable range of 10 dB or less for any given single mode fiber optic link.
2-7
REQUIREMENTS/SPECIFICATIONS
Fiber Optic Budget
The fiber optic delay budget, which determines the fiber optic cable’s maximum length, should be calculated and taken into consideration in the network design stage. Fiber optic delay budget is determined by summing the optical signal loss due to fiber optic cable attenuation, in-line splices, and fiber optic connectors.

2.2 CABLE RECOMMENDATIONS/TROUBLESHOOTING

The following sections describe common cable problems and recommendations for correcting them.
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. UTP lobe cabling should be dedicated to carrying T oken Ring traf fic. A v oid mixing T oken Ring signals with other applications (voice, etc.) within the same cable.
Noise
Noise can be caused by crosstalk or externally imposed impulses. If noise-induced errors are suspected, ensure that the electrical wiring in the area is properly wired and grounded and/or try re-routing cabling away from potential noise sources (motors, switching equipment, fluorescent lighting, high amperage equipment).
Temperature
The attenuation of PVC-insulated cable varies significantly with temperature. Check the cable manufacturer’ s specifications. Plenum-rated cables are strongly recommended in areas where temperatures exceed 40˚C. Under such conditions, plenum-rated cables ensure that cable attenuation remains within specifications.
2-8
REQUIREMENTS/SPECIFICATIONS
Other Considerations
In addition to complying with the preceding cable specifications, the following recommendations should be followed to minimize errors and obtain optimum performance from the network:
UTP cabling should be free of splices, stubs, or bridged taps.
Maintain a two punch-down block limit between TCU ports and w all outlets.
Properly ground metal troughs, ducts, etc. carrying Token Ring signals.
Avoid routing Token Ring signals near copper cables that exit a building or are susceptible to lightning strikes and power surges.
UTP cables containing Token Ring signals should not be simultaneously used for applications which may impress high voltages (greater that 5 volts) with sharp rise or fall times. The noise coupling from such signals could directly cause errors on the Token Ring network.
Lobe lengths between TCU ports and connected devices should not exceed 100 meters of 22 to 24 AWG wire.
Wherever possible, use dedicated UTP cable for Token Ring signals.

2.3 COM PORT SPECIFICATIONS

The RJ45 COM 1 and COM 2 ports (Figure 2-2) support Local Management applications. A description of COM port applications is listed below:
MicroMMAC-24T
16M4M
DISPLAY
SPEED
RESET
TOKEN RING HUB
SUPPORTING 100 OHM UTP CABLE
COM 2
Figure 2-2. COM 1/COM 2 Ports
COM 1
WITH
LANVIEW®
2-9
REQUIREMENTS/SPECIFICATIONS
Local Management
Both COM 1 and COM 2 ports are factory-configured to support Local Management access by an actual or emulated Digital Equipment Corporation VT 100™ terminal.
Booting/Diagnostics
Terminal display of POWER UP booting/diagnostic tests available only when terminal is connected to COM 2 (for information about Boot sequences, see Section 5.3 ).
UPS
COM 2 supports Uninterruptible Power Supply (American Power Conversion only).
SLIP
Both COM ports support Serial Line Internet Protocol (SLIP).
Modem
Both COM ports support modem connection.

2.4 TPIM SPECIFICATIONS

TPIMs provide Ring In/Ring Out (RI/RO) connections that can e xtend the network through a variety of media. Each TPIM has an embedded repeater that re-times all data.
The LNK (Link) LED on each TPIM provides the following information:
Green - RI or RO active
Red (TPIM-T1/T2/T4 only) - No Link (Autowrapped)
Off - No Link (Wrapped or Disabled)
TPIM-T1
TPIM-T1 provides a female DB9 connector that supports STP cabling. Figure 2-3 shows TPIM-T1 pinouts for Ring Out and Ring In applications.
2-10
REQUIREMENTS/SPECIFICATIONS
5 4 3 2 1
LNK
9 8 7 6
TPIM-T1
RING OUT
1. Transmit +
2. Ground
3. +5V at 250 mA
4. Ground
5. Receive -
6. Transmit -
7. Ground
8. Ground
9. Receive +
RING IN
1. Receive +
2. Ground
3. +5V at 250 mA
4. Ground
5. Transmit -
6. Receive -
7. Ground
8. Ground
9. Transmit +
Figure 2-3. TPIM-T1 Pinouts
TPIM-T2
TPIM-T2 provides an RJ45 connector that supports UTP cabling. Figure 2-4 shows pinouts for Ring Out and Ring In applications.
1 2 3 4 5 6 7 8
LNK
TPIM-T2
RING OUT
1. Not Used
2. Not Used
3. Receive -
4. Transmit +
5. Transmit -
6. Receive +
7. Not Used
8. Not Used
RING IN
1. Not Used
2. Not Used
3. Transmit -
4. Receive +
5. Receive -
6. Transmit +
7. Not Used
8. Not Used
Figure 2-4. TPIM-T2 Pinouts
TPIM-T4
TPIM-T4 is an RJ45 connector that supports STP cabling. Figure 2-5 shows pinouts for Ring Out and Ring In applications.
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