Cabletron Systems HSIM-W87 User manual

HSIM-W87
TX RX
TELCO
T3
LNK
STS CPU
Title Page
HSIM-W87
User’s Guide
9032689-02

HSIM-W87 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 FORANY 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
Part Number: 9032689-02 September 1998
Cabletron Systems and LANVIEW are registered 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.

Notice
ii HSIM-W87 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
HSIM-W87 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
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PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL,
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EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR
ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME
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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
iv HSIM-W87 User’s Guide

HSIM-W87 User’s Guide v
CONTENTS
CHAPTER 1 INTRODUCTION
1.1 Using This Manual.......................................................................1-1
1.2 Overview......................................................................................1-2
1.3 Data Flow in the HSIM-W87........................................................1-4
1.4 Features ......................................................................................1-4
1.4.1 Connectivity ....................................................................1-4
1.4.2 HDLC..............................................................................1-5
1.4.3 Inverse Multiplexing (IMUX)............................................1-5
1.4.4 Priority Queuing..............................................................1-6
1.4.5 DS1 Alarm ......................................................................1-6
1.4.6 SNMP and MIB Support .................................................1-6
1.4.7 LANVIEW Diagnostic LEDs............................................1-7
1.5 Document Conventions...............................................................1-7
1.6 Related Documentation...............................................................1-8
1.7 Getting Help.................................................................................1-9
CHAPTER 2 INSTALLATION
2.1 Unpacking the HSIM-W87...........................................................2-1
2.2 Installing the HSIM-W87..............................................................2-2
2.2.1 Installing the HSIM-W87 in an Interface Module ............2-2
2.2.2 Installing the HSIM-W87 in a Standalone Device...........2-5
2.3 Connecting the HSIM-W87 to the Network..................................2-6
2.4 HSIM-W87 Setup.........................................................................2-6
CHAPTER 3 LANVIEW LEDs
3.1 LANVIEW LEDs...........................................................................3-1
CHAPTER 4 MANAGEMENT
4.1 Local Management......................................................................4-1
4.2 Network Tools..............................................................................4-3
4.2.1 Commands .....................................................................4-4
4.2.2 Built-in Commands .........................................................4-6
4.2.3 Special Commands.......................................................4-13
4.3 Sample IMUX Configuration......................................................4-14

Contents
vi HSIM-W87 User’s Guide
CHAPTER 5 TROUBLESHOOTING
5.1 Troubleshooting the HSIM-W87..................................................5–1
5.1.1 Hardware Troubleshooting.............................................5–1
5.1.2 Investigating Software Configuration Problems .............5–3
5.1.3 Problems with the Firmware Image................................5–3
APPENDIX A SPECIFICATIONS
A.1 Physical Properties ..................................................................... A-1
A.2 Environmental Requirements......................................................A-1
A.3 Regulatory Compliance...............................................................A-2
APPENDIX B TYPICAL CONFIGURATION
APPENDIX C WANTERMS AND ACRONYMS

HSIM-W87 User’s Guide 1-1
CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems HSIM-W87 User’s Guide . This
manual describes the HSIM-W87 and provides information concerning
features, installation, the use of management, troubleshooting, and
specifications.
A general working knowledge of Wide Area Networking (WAN),
including T1 and T3 Networking, Ethernet and data communications
networks, and their physical layer components is helpful when installing
this device.
The HSIM-W87 has one T3 port, which consists of two BNC connectors,
a transmit and a receive port. Figure 1-1 shows the HSIM-W87.
Figure 1-1 HSIM-W87
1.1 USINGTHIS MANUAL
Reading through this manual completely will help you understand the
features and capabilities of the HSIM-W87. The following list provides
an overview of each section of this manual:
Chapter 1, Introduction , outlines the contents of this manual, describes
the HSIM-W87 features and concludes with a web site address where
related manuals can be obtained.
Important Notice
Depending on the firmware version used in the HSIM-W87, some
features described in this document may not be supported. Refer to the
Release Notes shipped with the HSIM-W87 to determine which features
are supported.
HSIM-W87
TX RX
TELCO
T3
LNK
STS CPU

Chapter 1: Introduction
1-2 HSIM-W87 User’s Guide
Chapter 2, Installation , describes how to install an HSIM-W87 into an
interface module or a standalone device (host platform).
Chapter 3, LANVIEW LEDs , describes how to use the HSIM-W87
LEDs to monitor the HSIM performance and status.
Chapter 4, Management , describes the Network Tools needed for
configuration for the HSIM-W87.
Chapter 5, Troubleshooting , describes some of the common
troubleshooting problems and possible solutions.
Appendix A, Specifications , lists the operating specifications and
regulatory compliance of the HSIM-W87.
Appendix B, Typical Configuration , displays possible configurations for
the HSIM-W87.
Appendix C, WAN Terms and Acronyms , provides a glossary of some
terms and acronyms used in this manual.
1.2 OVERVIEW
The HSIM-W87 extends the functionality of certain Cabletron Systems
platforms by providing an interface for Wide Area Network (WAN) DS3
services. The HSIM-W87 is a High Speed Interface Module (HSIM) used
to provide WAN services using the SmartSwitch series of products as a
platform. The HSIM-W87 has a physical DS3 interface, providing up to
28 separate logical DS1 connections. The 28 T1 circuits are all capable of
acting either as a single 45 Mbps full duplex data circuit or as individual
T1 circuits within a Layer 2 Inverse Multiplexing (IMUX) group.
The typical configuration is a head-end WAN aggregation point for up to
28 T1s into a single WAN physical interface. The HSIM-W87 is able to
uplink any combination of single T1s or multiple T1 IMUX groups to the
backbone.
NOTE
The term “host platform” is used to describe the interface
module, or standalone device, into which the HSIM-W87 can
be installed.

Overview
HSIM-W87 User’s Guide 1-3
The HSIM-W87 has its own i960 HD microprocessor used to process data
packets, provide simple configuration, Inverse Multiplexer functionality,
and statistics processing. The SmartSwitch host platform provides the
required logical IP Host services. The HSIM-W87 is designed to be
installed in any Cabletron Systems product that supports the High Speed
Interface Module.
The HSIM-W87 operates in two modes:
• Switching
• IMUX
The first mode, switching, is the default mode. The HSIM-W87 forwards
data packets received by the host platform out through the logical DS1
interfaces. It also forwards packets received in the DS1 interfaces to or
through the host. The default and only layer 2 WAN protocol used with
the HSIM-W87 is raw HDLC.
The second mode of operation is using Cabletron Systems Inverse
Multiplexer (IMUX) functionality to aggregate multiple DS1 connections
into single higher bandwidth WAN connections. In order to operate in this
mode, the user will simply need to configure the appropriate IMUX
groups containing the DS1 connections.
Along with the built-in management features (Network Tools) described
in Chapter 4, the HSIM-W87 can be managed using SNMP, and statistical
data can be accessed via SNMP by referencing the interface group defined
in RFC-1213.
NOTE
The host platform may operate in 802.1D bridging, 802.1Q
VLAN, or SecureFast mode.

Chapter 1: Introduction
1-4 HSIM-W87 User’s Guide
1.3 DATA FLOW IN THE HSIM-W87
The T3 port receives the DS3 data through the coaxial interface. A T3
framer/Multiplexer strips off the T3 framing and provides 28 individual
T1 data streams. The T1 data streams are then terminated by T1 framers,
which provide an HDLC bit stream to the HDLC controller. The
controller receives data packets from each of the bit streams and places
them in a memory subsystem. An onboard CPU examines the packet and
notifies the host of its arrival. Finally, a Cabletron proprietary ASIC
transfers the data to the host platform.
This process is followed in reverse when a packet is transmitted from the
host platform out the T3 port. The host platform notifies the HSIM-W87
when a packet is coming and transfers the packet to the memory. The
HDLC format is applied to the data; then the data is framed to a T1
format, and passed to the framer/ Multiplexer. The T1 data is multiplexed
with other T1 streams and is transmitted out through the T3 interface.
1.4 FEATURES
• Data Transfer Rates of 45 Mbps in full duplex, when running all 28
T1s carrying continuous data traffic of 128-byte packets or larger.
• High-level Data Link Control (HDLC) protocol
• T1 Inverse Multiplexing (IMUX)
• WAN IP Priority Queuing functionality
• DS1 Alarm Thresholds
• SNMP support
• DS1 and DS3 MIB Support
• LANVIEW LEDs
1.4.1 Connectivity
The HSIM-W87 module supports WAN technology using a DS3
interface, and supports 28 live full duplex T1 connections. The
HSIM-W87 channelizes the T3 down to the DS1 level. The HSIM-W87
has an integrated M13 MUX.

Features
HSIM-W87 User’s Guide 1-5
The primary function of the HSIM-W87 is to provide LAN to WAN
access. WAN physical connectivity will be supported through the use of a
T3 interface with an unbalanced 75 ohm coaxial cable pair. LAN to WAN
connectivity will be supported through HDLC and T1 Inverse
Multiplexing (IMUX).
The HSIM-W87 interoperates with those Cabletron Systems WAN
products that support raw HDLC as the WAN protocol. This support is
limited to the CyberSWITCH product line which supports HDLC:
• CSX400 – Version 02.00.15 or higher
• HSIM-W6 – Version 02.00.15 or higher
• HSIM-W84 – Version 02.00.xx or higher
• HSIM-W85 – Version 02.00.xx or higher
1.4.2 HDLC
The High-level Data Link Control (HDLC) protocol is used in
conjunction with the Inverse Multiplexing (IMUX) feature to conserve a
user’s WAN bandwidth between two Cabletron Systems products, over a
point-to-point connection. Cabletron Systems products such as the
HSIM-W6, HSIM-W84, HSIM-W85, HSIM-W87, and CSX400 must be
in use on both ends of the WAN link for these functions to work. The
HDLC (RAW) protocol reduces the amount of overhead information that
needs to be contained within each data packet to direct it to its destination.
This decreased packet overhead provides the IMUX functions with more
bandwidth to transfer user data.
1.4.3 Inverse Multiplexing (IMUX)
Cabletron Systems Inverse Multiplexing (IMUX) feature provides
enhanced throughput for users by doing the following:
• The IMUX function evenly distributes a data packet stream from the
LAN interface through multiple full T1 WAN interfaces on the
HSIM-W87.
• Data packet streams received by the WAN interfaces on the other end
of theWAN links are then recombined, ordered, and transmitted to the
LAN interface.

Chapter 1: Introduction
1-6 HSIM-W87 User’s Guide
• The IMUX function is configurable using the Network Tools
command, imux, described in Chapter 4.
1.4.4 Priority Queuing
WAN IP Priority Queuing is used to prioritize IP packets from a specified
IP address. This prioritization ensures that certain packets get through the
network, such as management packets which are necessary to the
operation of the network, and routers that depend on protocols with tight
timing, such as RIP, do not time out. The prioritized packets do not
eliminate other traffic on the network, but are held in a special queue, so
that they are not discarded during oversubscribed traffic peaks. Priority
Queuing can be enabled in management, using Network Tools. Refer to
the wanpq command in the Management chapter.
1.4.5 DS1 Alarm
Using the DS1 Error Threshold Alarm Monitor provides a means of
setting error thresholds and notifying the user of potential DS1 problems
with SNMP trap events.
The ds1alarm Monitor feature can be enabled in management, using
Network Tools. Refer to the ds1alarm command in the Management
chapter.
1.4.6 SNMP and MIB Support
With the SNMP support, the MIBs supported by the HSIM-W87 include:
• RFC 1406 – Definitions of Managed Objects for the DS1 and E1
Interface Types
• RFC 1407 – Definitions of Managed Objects for the DS3/E3 Interface
Type
NOTE
Cabletron Systems products that support Inverse Multiplexing
(IMUX), such as the HSIM-W87, HSIM-W6, CSX400,
HSIM-W84, and HSIM-W85, must exist on both ends of the
WAN link for the IMUX function to work. All bridging and
switching functions, such as 802.1D, SecureFast VLAN, and
802.1Q are able to run as normal on the host platform when
using the IMUX function on the HSIM-W87.

Document Conventions
HSIM-W87 User’s Guide 1-7
• RFC 1213 (MIBII) support for the Interface Table
• Cabletron Enterprise MIBs
Refer to the Release Notes included with the host platform for a list of all
MIBs supported by the HSIM-W87. For information about how to extract
and compile individual MIBs, contact the Cabletron Systems Global Call
Center (Section 1.7).
1.4.7 LANVIEW Diagnostic LEDs
Cabletron Systems provides a visual diagnostic and monitoring system
called LANVIEW. The HSIM-W87 LANVIEW LEDs help you quickly
identify status of the device. Chapter 3 provides information on the
HSIM-W87 LEDs.
1.5 DOCUMENT CONVENTIONS
The following conventions are used throughout this document:
NOTE
Note symbol. Calls the reader’s attention to any item of
information that may be of special importance.
!
CAUTION
Caution symbol. Contains information essential to avoid
damage to the equipment.
Electrical Hazard Warning symbol.Warns against an action
that could result in personal injury or death due to an electrical
hazard.
TIP
Tip symbol. Conveys helpful hints concerning procedures or
actions.

Chapter 1: Introduction
1-8 HSIM-W87 User’s Guide
1.6 RELATED DOCUMENTATION
The documentation for the host platform in which the HSIM-W87 is to be
installed provides additional information about the setup of the
HSIM-W87. The host documentation is not listed below, as there can be
many different host platforms. This user’s guide references procedures in
these documents, where appropriate, but does not repeat them.
Documents can be obtained on the World Wide Web in Adobe Acrobat
Portable Document Format (PDF) at the following site:
http://www.cabletron.com/
bold type Denotes either a user input or a highlighted screen selection.
RETURN Indicates either the ENTER or RETURN key, depending on your
keyboard.
ESC Indicates the keyboard Escape key.
SPACE bar Indicates the keyboard space bar key.
BACKSPACE Indicates the keyboard backspace key.
arrow keys Refers to the four keyboard arrow keys.
[-] Indicates the keyboard – key.
DEL Indicates the keyboard delete key.
italic type Italic type emphasizes important information, indicates variables,
and indicates complete document titles.
n.nn A period in numerals signals the decimal point indicator. (e.g.,
1.75 equals one and three fourths, or the Decimal Dotted Notation
(DDN) for an IP address.
x Indicates the generic use of a letter (e.g., xxx indicates any
combination of three alphabetic characters).
n Indicates the generic use of a number (e.g., 19 nn indicates a
four-digit number in which the last two digits are unknown).
[] In the Local Management screens, the brackets indicate that a
value may be entered or selected. In the format descriptions in the
Network Tools section, required arguments are enclosed in [].
<> In the format descriptions in the Network Tools section, optional
arguments are enclosed in <>.

Getting Help
HSIM-W87 User’s Guide 1-9
1.7 GETTING HELP
For additional support related to this device or document, contact the
Cabletron Systems Global Call Center:
Before calling the Cabletron Systems Global Call Center, have the
following information ready:
• Your Cabletron Systems service contract number
• A description of the failure
• A description of any action(s) already taken to resolve the problem
(e.g., changing mode switches, rebooting the unit, etc.)
• The serial and revision numbers of all involved Cabletron Systems
products in the network
• A description of your network environment (layout, cable type, etc.)
• Network load and frame size at the time of trouble (if known)
• The device history (i.e., have you returned the device before, is this a
recurring problem, etc.)
• Any previous Return Material Authorization (RMA) numbers
World Wide Web http://www.cabletron.com/
Phone [phone]
Internet mail suppor[email protected]
FTP ftp://ftp.cabletron.com/
Login anonymous
Password your email address
To send comments or suggestions concerning this document, contact the
Cabletron SystemsTechnical Writing Department via the following
email address: [email protected]
Make sure to include the document Part Number in the email message.

Chapter 1: Introduction
1-10 HSIM-W87 User’s Guide

HSIM-W87 User’s Guide 2-1
CHAPTER 2
INSTALLATION
To install the HSIM-W87 the following items are required:
• Antistatic wrist strap (shipped with the HSIM-W87)
• Phillips screwdriver
2.1 UNPACKING THE HSIM-W87
Unpack the HSIM-W87 as follows:
1. Remove the HSIM-W87 from the shipping box.
2. Leave the module in its antistatic bag until you are ready to install it.
3. Attach the antistatic wrist strap (refer to the instructions on the
antistatic wrist strap package for proper use).
4. After removing the module from its antistatic bag, visually inspect the
device. If you notice any signs of damage, contact the Cabletron
Systems Global Call Center immediately. Refer to Section 1.7 for
instructions. Save the antistatic bag in the event the module must be
reshipped or relocated.
NOTE
Before attempting to use the HSIM-W87 you should be familiar
with the IEEE 802.3 Specifications, and T1 and T3 Networking.
!
CAUTION
The HSIM-W87 and the host platform are sensitive to static
discharges.Use an antistatic strap and observe all static
precautions during this procedure. Failure to do so could result
in damage to the HSIM-W87 or host platform.

Chapter 2: Installation
2-2 HSIM-W87 User’s Guide
2.2 INSTALLING THE HSIM-W87
An HSIM-W87 can be installed in any Cabletron Systems device that
supports HSIM technology (e.g., 2H252-25R, 2E42-27, 6E132-25).
The following subsections provide instructions for installing an
HSIM-W87 in a host platform. Refer to the specific interface module or
standalone device document for exact HSIM slot and connector locations.
2.2.1 Installing the HSIM-W87 in an Interface Module
To install an HSIM-W87 in an interface module that supports HSIM
technology, perform the following steps.
1. Note the ports of the interface module that have cables attached to
them. Write down the ports and label the cables to make it easier to
reattach the network properly after the installation. Then disconnect
those cables from the ports.
2. Attach the antistatic wrist strap (refer to the instructions outlined on
the antistatic wrist strap package).
3. If the interface module is installed in a chassis, unlock the top and
bottom plastic locking tabs of the module faceplate.
4. Remove the module from the chassis, and place it down flat with the
internal components facing up.
5. Remove and save the two faceplate mounting screws securing the
HSIM coverplate and remove the coverplate. See Figure 2-1.
Only qualified personnel should install or service this unit.
NOTE Refer to the release notes for the version of firmware running
on the Cabletron Systems host platform to ensure that the
HSIM-W87 is supported.