Cabletron Systems 6H133-37 User manual

9032276-04
6H123-50 and 6H133-37 MicroLAN
SmartSwitch 6000 Interface Modules
User’s Guide
5
6
COM
CPU
6H123-50
Ethernet
COM
CPU
6H133-37
Ethernet
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
4
4
1
12
1
12
1
12
1
12
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
2
2
1
12
1
12
1
12
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
4
4
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
4
4
10
10
100
100
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
10
10
100
100

6H123-50 and 6H133-37 User’s Guide i
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.
 1998 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9032276-04 September 1998
Cabletron Systems , SPECTRUM , LANVIEW , QuickSET , S
ecure
F
ast
, and
BRIM
are registered
trademarks and SecureFast Switching and SmartSwitch are trademarks of Cabletron Systems, Inc.
All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.
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.
Only qualified personnel should perform installation
procedures.
Printed on Recycled Paper
notice_warn_doc Page i Tuesday, September 1, 1998 9:03 AM

Notice
ii 6H123-50 and 6H133-37 User’s Guide
INDUSTRY CANADA 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 is a Class A product based on the standard of the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI). If this equipment is used in a domestic environment,
radio disturbance may arise. When such trouble occurs, the user may be required to take corrective
actions.
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 THIS AGREEMENT, PROMPTLY RETURN THE UNUSED
PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.
notice_warn_doc Page ii Tuesday, September 1, 1998 9:03 AM

Notice
6H123-50 and 6H133-37 User’s Guide iii
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 OF WARRANTY 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 TO
YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING
BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE
ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
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 WARRANTIES, IN SOME
INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO
YOU.
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 03867-0505.
notice_warn_doc Page iii Tuesday, September 1, 1998 9:03 AM

Notice
iv 6H123-50 and 6H133-37 User’s Guide
SAFETY INFORMATION
CLASS 1 LASER TRANSCEIVERS
THE FE-100F3 FAST ETHERNET INTERFACE MODULE, FPIM-05 AND
FPIM-07 FDDI PORT INTERFACE MODULES, AND APIM-29 ATM
PORT INTERFACE MODULE USE CLASS 1 LASER TRANSCEIVERS.
READ THE FOLLOWING SAFETY INFORMATION BEFORE
INSTALLING OR OPERATING THESE MODULES.
The Class 1 laser transceivers use an optical feedback loop to maintain Class 1 operation limits. This
control loop eliminates the need for maintenance checks or adjustments. The output is factory set, and
does not allow any user adjustment. Class 1 Laser transceivers comply with the following safety
standards:
• 21 CFR 1040.10 and 1040.11 U.S. Department of Health and Human Services (FDA).
• IEC Publication 825 (International Electrotechnical Commission).
• CENELEC EN 60825 (European Committee for Electrotechnical Standardization).
When operating within their performance limitations, laser transceiver output meets the Class 1
accessible emission limit of all three standards. Class 1 levels of laser radiation are not considered
hazardous.
SAFETY INFORMATION
CLASS 1 LASER TRANSCEIVERS
LASER RADIATION AND CONNECTORS
When the connector is in place, all laser radiation remains within the fiber. The maximum amount of
radiant power exiting the fiber (under normal conditions) is -12.6 dBm or 55 x 10
-6
watts.
Removing the optical connector from the transceiver allows laser radiation to emit directly from the
optical port. The maximum radiance from the optical port (under worst case conditions) is
0.8 W cm
-2
or 8 x 10
3
W m
2
sr-1.
Do not use optical instruments to view the laser output. The use of optical instruments to view
laser output increases eye hazard. When viewing the output optical port, power must be
removed from the network adapter.
notice_warn_doc Page iv Tuesday, September 1, 1998 9:03 AM

Notice
6H123-50 and 6H133-37 User’s Guide v
DECLARATION OF CONFORMITY
Application of Council Directive(s): 89/336/EEC
73/23/EEC
Manufacturer’s Name: Cabletron Systems, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European Representative Name: Mr. J. Solari
European Representative Address: Cabletron Systems Limited
Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England
Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950
Equipment Type/Environment: Networking Equipment, for use in a
Commercial or Light
Industrial
Environment.
We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged
with this notice conforms to the above directives.
Manufacturer Legal Representative in Europe
Mr. Ronald Fotino Mr. J. Solari
___________________________________ ___________________________________
Full Name Full Name
Principal Compliance Engineer Managing Director - E.M.E.A.
___________________________________ ___________________________________
Title Title
Rochester, NH, USA Newbury, Berkshire, England
___________________________________ ___________________________________
Location Location
notice_warn_doc Page v Tuesday, September 1, 1998 9:03 AM

Notice
vi 6H123-50 and 6H133-37 User’s Guide
notice_warn_doc Page vi Tuesday, September 1, 1998 9:03 AM

6H123-50 and 6H133-37 User’s Guide vii
CONTENTS
CHAPTER 1 INTRODUCTION
1.1 Using This Guide.........................................................................1-1
1.2 Structure of This Guide................................................................1-2
1.3 Overview......................................................................................1-3
1.3.1 Connectivity ....................................................................1-5
1.3.2 Full Duplex Switched Ethernet........................................1-6
1.3.3 Auto-Negotiation.............................................................1-6
1.3.4 SmartTrunking ................................................................1-6
1.3.5 Management...................................................................1-7
1.3.6 Switching Options...........................................................1-7
1.3.7 Standards Compatibility..................................................1-7
1.3.8 LANVIEW Diagnostic LEDs............................................1-8
1.3.9 Year 2000 Compliant......................................................1-8
1.3.10 Runtime IP Address Discovery.......................................1-8
1.3.11 Local Management Features..........................................1-9
1.4 Optional Features........................................................................1-9
1.5 Document Conventions.............................................................1-11
1.6 Getting Help...............................................................................1-12
1.7 Related Manuals........................................................................1-13
CHAPTER 2 NETWORK REQUIREMENTS
2.1 SmartTrunk..................................................................................2-1
2.2 10BASE-T Network .....................................................................2-1
2.3 100BASE-TX Network.................................................................2-2
2.4 100BASE-FX Fiber Optic Network ..............................................2-2
CHAPTER 3 INSTALLATION
3.1 Required Tools............................................................................3-1
3.2 Unpacking the 6H123-50 and 6H133-37.....................................3-1
3.3 Options........................................................................................3-2
3.4 Installing the 6H123-50 and 6H133-37 into the 6C105 Chassis..3-2
3.5 Connecting to the Network..........................................................3-5
3.5.1 Connecting UTP Cables .................................................3-6
3.5.2 Connecting a Twisted Pair Segment to the FE-100TX...3-7
3.5.3 Connecting a Fiber Optic Segment to the
FE-100FX and FE-100F3 ...............................................3-9

Contents
viii 6H123-50 and 6H133-37 User’s Guide
CHAPTER 4 TROUBLESHOOTING
4.1 Using LANVIEW...........................................................................4-1
4.2 FE-100TX LED.............................................................................4-6
4.3 Troubleshooting Checklist............................................................4-7
4.4 Using the RESET Button .............................................................4-8
CHAPTER 5 LOCAL MANAGEMENT
5.1 Overview......................................................................................5-1
5.2 Local Management Keyboard Conventions.................................5-3
5.3 Management Terminal Setup.......................................................5-4
5.3.1 Console Cable Connection..............................................5-5
5.3.2 Management Terminal Setup Parameters ......................5-6
5.3.3 Telnet Connections .........................................................5-7
5.3.4 Monitoring an Uninterruptible Power Supply...................5-8
5.4 Accessing Local Management...................................................5-10
5.4.1 Navigating Local Management Screens........................5-11
5.4.2 Selecting Local Management Menu Screen Items........5-13
5.4.3 Exiting Local Management Screens..............................5-13
5.5 Main Menu Screen.....................................................................5-15
5.6 Chassis Menu Screen................................................................5-16
5.7 Chassis Configuration Screen ...................................................5-18
5.7.1 Setting the Subnet Mask...............................................5-21
5.7.2 Setting the IP Address...................................................5-21
5.7.3 Setting the Chassis Date...............................................5-23
5.7.4 Setting the Chassis Time ..............................................5-24
5.7.5 Entering a New Screen Refresh Time...........................5-24
5.7.6 Setting the Screen Lockout Time..................................5-25
5.8 SNMP Community Names Screen.............................................5-26
5.8.1 Establishing Community Names ...................................5-28
5.9 SNMP Traps Screen..................................................................5-29
5.9.1 Configuring the Trap Table............................................5-30
5.10 Chassis Environmental Information Screen...............................5-31
5.11 Port Redirect Function Screen...................................................5-32
5.11.1 Displaying the Source and Destination Entries.............5-34
5.11.2 Changing Source and Destination Ports.......................5-35
5.12 Module Selection Screen...........................................................5-36
5.12.1 Selecting a Module........................................................5-37
5.13 Module Menu Screen.................................................................5-38
5.14 Module Configuration Menu Screen ..........................................5-40

Contents
6H123-50 and 6H133-37 User’s Guide ix
5.15 General Configuration Screen...................................................5-42
5.15.1 Setting the IP Address..................................................5-45
5.15.2 Setting the Subnet Mask...............................................5-47
5.15.3 Setting the Default Gateway.........................................5-48
5.15.4 Setting the TFTP Gateway IP Address.........................5-48
5.15.5 Setting the Module Date ...............................................5-49
5.15.6 Setting the Module Time...............................................5-50
5.15.7 Entering a New Screen Refresh Time ..........................5-50
5.15.8 Setting the Screen Lockout Time..................................5-51
5.15.9 Setting the Operational Mode.......................................5-52
5.15.10Setting the Management Mode.....................................5-53
5.15.11Configuring the COM Port ............................................5-54
5.15.11.1 Changing the COM Port Application ............5-56
5.15.12Clearing NVRAM ..........................................................5-57
5.15.13Enabling/Disabling IP Fragmentation ...........................5-58
5.16 SNMP Community Names Screen............................................5-58
5.16.1 Establishing Community Names...................................5-60
5.17 SNMP Traps Screen..................................................................5-62
5.17.1 Configuring the Trap Table...........................................5-63
5.18 Switch Configuration Screen.....................................................5-64
5.18.1 Setting the STA.............................................................5-67
5.18.2 Setting the Age Time ....................................................5-67
5.18.3 Setting (Enabling or Disabling) the Port Status ............5-68
5.19 Module Specific Configuration Screen ......................................5-68
5.20 System Resources Screen........................................................5-70
5.20.1 Setting the Reset Peak Utilization ................................5-72
5.21 High Speed Interface Configuration Screen (6H123-50 Only) ..5-72
5.21.1 Configuring an FE-100FX or FE-100F3........................5-75
5.21.1.1 Setting the FE-100FX or FE-100F3
Operational Mode.........................................5-75
5.21.2 Configuring an FE-100TX.............................................5-76
5.21.2.1 Setting the FE-100TX Operational Mode.....5-76
5.21.2.2 Setting the FE-100TX Advertised Ability......5-76
5.22 Flash Download Screen ............................................................5-77
5.22.1 Image File Download Using TFTP................................5-80
5.22.2 Image File Download Using Runtime ...........................5-80
5.22.3 Image File Download Using BootP...............................5-81
5.23 Port Redirect Function Screen ..................................................5-82
5.23.1 Displaying the Source and Destination Entries.............5-84
5.23.2 Changing Source and Destination Ports.......................5-85
5.24 Broadcast Suppression Screen.................................................5-86
5.24.1 Setting the Threshold....................................................5-88
5.24.2 Setting the Reset Peak Switch .....................................5-88

Contents
x 6H123-50 and 6H133-37 User’s Guide
5.25 VLAN Main Menu (802.1Q) Screen...........................................5-89
5.26 Repeater Configuration Menu Screen .......................................5-90
5.27 Repeater Port Configuration Screen..........................................5-92
5.27.1 Setting the Port Operating Mode...................................5-94
5.27.2 Enabling /Disabling Ports..............................................5-95
5.27.3 Setting All Ports.............................................................5-95
5.27.4 Enabling/Disabling Network Ports.................................5-96
5.28 Module Level Security Configuration.........................................5-96
5.28.1 Setting the Module Level Security.................................5-99
5.29 Port Level Security Configuration Screen................................5-100
5.29.1 Setting the Port Level Security....................................5-103
5.30 Module Statistics Menu Screen ...............................................5-104
5.31 Switch Statistics Screen...........................................................5-106
5.32 Interface Statistics Screen.......................................................5-108
5.32.1 Displaying Interface Statistics .....................................5-111
5.32.2 Using the Clear Counters Command ..........................5-112
5.33 RMON Statistics Screen..........................................................5-112
5.33.1 Displaying RMON Statistics ........................................5-116
5.33.2 Using the Clear Counters Command ..........................5-116
5.34 Repeater Statistics Screen ......................................................5-117
5.34.1 Displaying Network Statistics......................................5-120
5.34.2 Displaying Repeater Statistics ....................................5-120
5.34.3 Using the Clear Counters Command ..........................5-121
5.35 Network Tools..........................................................................5-121
5.35.1 Built-in Commands......................................................5-123
5.35.2 Special Commands.....................................................5-132
APPENDIX A SPECIFICATIONS
A.1 Device Specifications.................................................................. A-1
A.2 Physical Properties..................................................................... A-1
A.3 Environmental Requirements...................................................... A-1
A.4 Input/Output Ports....................................................................... A-2
A.5 COM Port Pinout Assignments................................................... A-2
A.6 Regulatory Compliance............................................................... A-3
APPENDIX B FE-100TX, FE-100FX AND FE-100F3
SPECIFICATIONS
B.1 FE-100TX.................................................................................... B-1
B.2 FE-100FX.................................................................................... B-2
B.3 FE-100F3.................................................................................... B-3

Contents
6H123-50 and 6H133-37 User’s Guide xi
APPENDIX C OPTIONAL INSTALLATIONS AND
MODE SWITCH BANK SETTINGS
C.1 Required Tools............................................................................C-1
C.2 Setting the Mode Switches..........................................................C-1
C.3 Installing Optional Fast Ethernet Interface Modules....................C-4
INDEX

Contents
xii 6H123-50 and 6H133-37 User’s Guide

6H123-50 and 6H133-37 User’s Guide 1-1
CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems 6H123-50 and 6H133-37 MicroLAN
SmartSwitch 6000 Interface Modules User’s Guide . This guide
describes the 6H123-50 and 6H133-37 interface modules and provides
information concerning network requirements, installation,
troubleshooting, and Local Management.
1.1 USINGTHIS GUIDE
Read through this guide completely to understand the interface module
features, capabilities, and Local Management functions. A general
working knowledge of Ethernet and IEEE 802.3 type data
communications networks and their physical layer components is helpful
when using these devices.
NOTE
Unless noted differently, the information in this guide applies to
both SmartSwitch 6000 interface modules, which are referred
to as either the “6H123-50 and 6H133-37” or the “modules”.

Chapter 1: Introduction
1-2 6H123-50 and 6H133-37 User’s Guide
1.2 STRUCTURE OFTHIS GUIDE
This guide is organized as follows:
Chapter 1, Introduction , outlines the contents of this manual, describes
the features of the 6H123-50 and 6H133-37, provides instructions on
obtaining additional help and concludes with a list of related manuals.
Chapter 2, Network Requirements , explains the network requirements
to consider before installing the 6H123-50 and 6H133-37 into the 6C105
SmartSwitch 6000 chassis.
Chapter 3, Installation , provides instructions on how to install the
modules in the chassis and connect segments to the devices.
Chapter 4, Troubleshooting , details the 6H123-50 and 6H133-37
LANVIEW LEDs that enable you to quickly diagnose
network/operational problems.
Chapter 5, Local Management , describes accessing Local Management
and using the Local Management screens to manage the 6H123-50 and
6H133-37 modules, and the 6C105 chassis.
Appendix A, Specifications , contains information on functionality and
operating specifications, connector pinouts, environmental requirements,
and physical properties.
Appendix B, FE-100TX, FE-100FX and FE-100F3 Specifications ,
contains information about FE-100TX pinouts and information
concerning cable types used with the FE-100FX and FE-100F3.
Appendix C, Optional Installations and Mode Switch Bank Settings ,
describes how to install optional Fast Ethernet Interface Modules and how
to set the Mode Switches.

Overview
6H123-50 and 6H133-37 User’s Guide 1-3
1.3 OVERVIEW
The 6H123-50 and 6H133-37, shown in Figure 1-1, are interface modules
for the Cabletron Systems 6C105 SmartSwitch 6000 chassis.
The 6H123-50 and 6H133-37 are high-speed network repeater/switch
devices. The 6H123-50 provides four Ethernet repeated segments and
four Fast Ethernet repeated segments (CONN 1 through CONN 4). The
6H133-37 provides three Ethernet repeated segments and three Fast
Ethernet repeated segments (CONN 1 through CONN 3). The RJ21
connectors each consist of 12 repeater ports that are able to reside on the
Ethernet (10 Mbps) or the Fast Ethernet (100 Mbps) segment. Each
Ethernet and Fast Ethernet segment supports 802.1D switching
(bridging), Cabletron Systems SecureFast Switching Virtual Network
technology and IEEE 802.1Q Port Based VLANs.
Slots 5 and 6 (interfaces 9 and 10) of the 6H123-50 support optional Fast
Ethernet Interface Modules providing uplinks to 100BASE-TX or
100BASE-FX Fast Ethernet networks. The 6H133-37 is capable of being
equipped with a High Speed Interface Module (HSIM) that provides for
additional connectivity to other high speed networking technologies such
as Asynchronous Transfer Mode (ATM), Fiber Distributed Data Interface
(FDDI) and Wide Area Network (WANs).
The 6H123-50 and 6H133-37 switch each Ethernet and Fast Ethernet
segment (CONN 1 through CONN 4 and CONN 1 through CONN 3) to
one another and to the optional Fast Ethernet Interface modules of the
6H123-50 or an HSIM installed in the 6H133-37.

Chapter 1: Introduction
1-4 6H123-50 and 6H133-37 User’s Guide
Figure 1-1 The 6H123-50 and 6H133-37
5
COM
CPU
6H123-50
Ethernet
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
4
4
1
12
1
12
1
12
1
12
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
4
4
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
4
4
10
10
100
100
COM
CPU
6H133-37
Ethernet
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
2
2
1
12
1
12
1
12
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
C
C
O
O
N
N
N
N
1
1
C
C
O
O
N
N
N
N
2
2
C
C
O
O
N
N
N
N
3
3
10
10
100
100
COM Ports
Ethernet/Fast Ethernet
Interfaces
1 - 8
1 - 6
HSIM Slot
Fast Ethernet Interface
Module Slots
(Slots 5 and 6)
2276-01
C
C
O
O
N
N
N
N
3
3
6

Overview
6H123-50 and 6H133-37 User’s Guide 1-5
Table 1-1 shows the port organization for both modules.
1.3.1 Connectivity
The 6H123-50 and 6H133-37 connect to Ethernet/Fast Ethernet networks
or workstations through RJ21 ports on the front panel. Each port supports
a 25-pair cable at lengths up to 100 meters (each pair must be Category 5
compliant with an impedance of 85 to 111 ohms). The ports are IEEE
802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliant.
The 6H123-50 has two front panel slots (connectors 5 and 6 or interfaces
9 and 10) for optional Fast Ethernet Interface Modules to support an
uplink to Fast Ethernet backbones or a high speed connection to a local
server.
The 6H133-37 has one front panel slot for an optional High Speed
Interface Module (Interface 7) to provide for additional connectivity to
other high speed networking technologies such as ATM, FDDI, and
WANs.
Cables available for 100BASE-TX operation include the following:
• 180° angle connector (straight-through RJ21-to-RJ21)
• 180° RJ21-to-RJ45 connector
• 120° angle connector with the same options
Table 1-1 Port Organization
6H123-50 6H133-37
CONN 1 = Network Port 1, 10 Mbps
Network Port 2, 100 Mbps CONN 1 = Network Port 1, 10 Mbps Network Port 2, 100 Mbps
CONN 2 = Network Port 3, 10 Mbps
Network Port 4, 100 Mbps CONN 2 = Network Port 3, 10 Mbps Network Port 4, 100 Mbps
CONN 3 = Network Port 5, 10 Mbps
Network Port 6, 100 Mbps CONN 3 = Network Port 5, 10 Mbps Network Port 6, 100 Mbps
CONN 4 = Network Port 7, 10 Mbps
Network Port 8, 100 Mbps HSIM = Port 7
Fast Ethernet Slot 5 = Port 9
Fast Ethernet Slot 6 = Port 10

Chapter 1: Introduction
1-6 6H123-50 and 6H133-37 User’s Guide
1.3.2 Full Duplex Switched Ethernet
The optional Fast Ethernet Interface Modules for the 6H123-50 can be
configured to operate in Full Duplex Switched Ethernet mode, which
provides up to 200 Mbps of bandwidth.
1.3.3 Auto-Negotiation
The repeater ports and Fast Ethernet Interface Modules can auto-negotiate
the type of connection required to provide a link to another device.
During Auto-Negotiation, two devices automatically exchange
information “telling” each other what their operating capabilities are. The
Auto-Negotiation feature targets the maximum capabilities that can be
reached between the two devices. For example, an FE-100TX Fast
Ethernet Interface Module in a 6H123-50 can adjust to 100 Mbps when
the device on the other end of the connection can also adjust to 100 Mbps.
If the device on the other end of the connection can only operate at
10 Mbps, then the FE-100TX simply adjusts to 10 Mbps operation.
When Auto-Negotiation is supported at both ends of a link, the two
devices dynamically adjust to full or half duplex operation based on the
maximum capability that can be reached between the two devices. If the
device connected to the FE-100TX cannot auto-negotiate, the FE-100TX
Fast Ethernet Interface Module operates according to the capabilities of
the other device.
1.3.4 SmartTrunking
SmartTrunk, also referred to as SmartTrunking, is Cabletron Systems’
terminology for load balancing or load sharing. SmartTrunk technology
provides an easy-to-implement mechanism to group, or aggregate,
multiple physical links together to scale the backbone bandwidth beyond
the limitations of a single link. All links are user-configurable so
administrators can scale the backbone bandwidth by adding SmartTrunk
links. The SmartTrunk benefits are as follows:
• All purchased bandwidth is used.
• Distributed, resilient links increase reliability and performance.
• Multiple technologies are supported within a single trunk for
maximum flexibility.