Cabletron Systems 42T User manual

MICROMMAC-22T/24T/42T/44T
STACKABLE TOKEN RING
INTELLIGENT HUBS
USER’S GUIDE

iii
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.
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
per

NOTICE
iv
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 ClassA 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.
NEED JAP ANESE GRAPHIC TEXT HERE
BEFORE RELEASE

NOTICE
v
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. IFYOU DO NOT AGREE TO THE
TERMS OF THISAGREEMENT, PROMPTLY RETURN THE UNUSED PRODUCT TO
THE PLACE OF PURCHASE FOR A FULL REFUND.
CABLETRON SOFTWARE PROGRAM LICENSE
1. 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. 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.
EXCLUSION OFWARRANTY AND DISCLAIMER
OF LIABILITY
1. EXCLUSION OF WARRANTY. Except as may be specifically provided by
Cabletron in writing, Cabletron makes no warranty, expressed or implied, concerning the
Program (including Its documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED
TOYOU 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.

NOTICE
vi
2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
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
DAMAGES, OR OTHER LOSS)ARISING OUT OF THE USE OR INABILITY TO 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 TOYOU.
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.
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

vii
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

CONTENTS
viii
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

CONTENTS
ix
5.2.4 Saved System Messages. . . . . . . . . . . . . . . . . . . .5-6
5.3 VIEWING POWER UP DIAGNOSTIC TESTS. . . . . . . . . .5-7

1-1
CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems MicroMMAC-22T/-24T/-42T/
-44T StackableToken Ring Intelligent Hub User’s Guide
. 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.
.
Figure 1-1. The MicroMMAC-T
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.
Chapter2,
Requirements/Specifications ,describescablingrequirements,
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
RO
TOKEN RING HUB WITH LANVIEW®
SUPPORTING 100 OHM UTP CABLE
MicroMMAC-24T
RESET
CPU ACT
MGMT
16 Mb/s
COM 1COM 2
DISPLAY
SPEED
16M4M TPIM
6 5 4 3 2 1
18 17 16 15 14 13
24 23 22 21 20 19
12 11 10 9 8 7
RI
LCD
TPIM
Slot
Ring Out

INTRODUCTION
1-2
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
performanceofthe MicroMMAC-TusingLANVIEW®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
seamlessentitieswithin theMicroMMAC-T,provideconnectivitynotonly
to standard Token Rings but also to Ethernet, FDDI,ATM, and WAN
environments, depending upon the BRIM types used.
TokenRingPort InterfaceModules(TPIMs)attachable at theRingIn/Ring
Out(RI/RO) ports provideconnectivity and expandedtrunkconnectionsto
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.
Telnet 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.

INTRODUCTION
1-3
Figure 1-2. Typical MicroMMAC-T Configuration Scenario
All MicroMMAC-Ts are functionally and physically identical except for
the number and type of theirTrunk 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.
SDLC
TOKEN RING
Telnet
UTP
WORKSTATION

INTRODUCTION
1-4
ActiveTCU Ports
The active TCU ports regenerate, reshape, and filter the incoming signal,
permitting UTP lobe cable lengths of up to
120 meters and STP lobe cable
lengths up to
150 meters at 16 Mbps ring speed. The MicroMMAC-22T
andtheMicroMMAC-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
beremoved fromthe network and wired correctlyto 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 CorporationVT100™ series terminal to the MicroMMAC-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

INTRODUCTION
1-5
re-time all data. Cabletron offers a variety of TPIMs for RI/RO trunk
connections as shown in Table 1-1.
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/RO 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.
TheMicroMMAC-T inDLMmode will collect managementdata from the
Table 1-1. TPIMs
TPIM Media Type Connector
TPIM-T1 Shielded Twisted Pair DB9
TPIM-T2 Unshielded Twisted Pair RJ45
TPIM-T4 Shielded Twisted Pair RJ45
TPIM-F2 Multimode Fiber Optic ST
TPIM-F3 Single mode Fiber Optic ST

INTRODUCTION
1-6
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 comprehensive system-level information
such as power-up diagnostics, FLASH image revision 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

INTRODUCTION
1-7
• 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
Token Ring ML Stats Table
Token Ring P Stats Table
statistics 2
statistics 3
History
rmon 2
History Control Table
Token Ring ML History Table
Token Ring P History Table
history 1
history 3
history 4
Alarm
rmon 3
Alarm Table alarm 1
Host
rmon 4
Host Control Table
Host Table
Host Time Table
hosts 1
hosts 2
hosts 3
HostTopN
rmon 5
HostTopN Control Table
HostTopN Table
hostTopN 1
hostTopN 2
Matrix
rmon 6
Matrix Control Table
Matrix SD Table
Matrix DS Table
Matrix 1
Matrix 2
Matrix 3

INTRODUCTION
1-8
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-off the MicroMMAC-T to add or remove hubs
from the stack.
Event
rmon 9
Event Table
Log Table
event 1
event 2
Token Ring
rmon 10
Ring Station Control Table
Ring Station Table
Ring Station Order Table
Ring Station Config Control Table
Ring Station Config Table
Source Routing Stats Table
Token Ring 1
Token Ring 2
Token Ring 3
Token Ring 4
Token Ring 5
Token Ring 6
Table 1-2. RMON MIB RFC 1271/1513 Support (Cont.)
Group Subgroup Section

INTRODUCTION
1-9
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. MicroMMAC-T management systems treat the installed BRIM
and the hub as a single entity. Cabletron offers the BRIMs listed in
Table 1-3.
REAR VIEW
MicroMMAC Managing 4 Non-Intelligent Hubs
HubSTACK
STH-24
MicroMMAC-24T TOKEN RING HUB WITH LANVIEW®
BRIM Slot
STACK
RESERVED
STACK5STACK4STACK3STACK2
STACK
RESERVED
RESERVED STACK
STACK
RESERVED
HubSTACK
STH-24
HubSTACK
STH-24
HubSTACK
STH-24

INTRODUCTION
1-10
.
1.5.1 SNA/WAN Integration
The MicroSNAC add-on daughterboard provides two ports, both of which
canbeused to provideconversionfrom SNA/SDLCor 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
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

INTRODUCTION
1-11
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. . . . . . . . . . . . . . . . . . [phone]
Monday-Friday; 8am - 8pm EST
By CompuServe
®
. . . . . . . . . . . GO CTRON from any ! prompt
By Internet mail . . . . . . . . . . . . [email protected]
By BBS. . . . . . . . . . . . . . . . . . . [phone]
By mail . . . . . . . . . . . . . . . . . . . Cabletron Systems, Inc.
P.O. Box 5005
Rochester, NH 03866-5005

2-1
CHAPTER 2
REQUIREMENTS/SPECIFICATIONS
Read this chapter prior to installing the MicroMMAC-T. It contains
operatingspecificationsand requirements for powerand cabling.To 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.
Figure 2-1. MicroMMAC-T Ports/Cables
Trunk Cabling
Token Ring Station
DISPLAY
TOKEN RING HUB WITH LANVIEW®
SUPPORTING100 OHM STP CABLE
MicroMMAC-24T
RESET
CPU ACT
MGMT
16 Mb/s
COM 1COM 2
DISPLAY
SPEED
16M4M
6 5 4 3 2 1
18 17 16 15 14 13
24 23 22 21 20 19
12 11 10 9 8 7
DISPLAY
TOKEN RING HUB WITH LANVIEW®
SUPPORTING100 OHM STP CABLE
MicroMMAC-24T
RESET
CPU ACT
MGMT
16 Mb/s
COM 1COM 2
DISPLAY
SPEED
16M4M
6 5 4 3 2 1
18 17 16 15 14 13
24 23 22 21 20 19
12 11 10 9 8 7
Lobe Cabling TCU Lobe Ports
Ring Out TPIM
Ring In TPIM
RO
RO RI
RI