Enterasys Networks VH-4802 User Manual

VERTICAL HORIZON

VH-4802

FAST ETHERNET SWITCH

USER GUIDE

9033630

Notice

Only qualified personnel should perform installation
procedures.

NOTICE

Enterasys Networks 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 Enterasys
Networks 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 ENTERASYS NETWORKS 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 ENTERASYS NETWORKS HAS BEEN
ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH
DAMAGES.

 2000 by Enterasys Networks, Inc., P.O. Box 5005, Rochester, NH 03866-5005

All Rights Reserved
Printed in Taiwan, R.O.C.

Order Number: 9033630 November 2000

Enterasys, Enterasys Networks, and Vertical Horizon are trademarks or registered trademarks of
Enterasys Networks, Inc.

Microsoft, Windows, Windows 95, Windows 98, and Windows NT are either trademarks or registered
trademarks of Microsoft Corporation.

Netscape and Netscape Navigator are trademarks of Netscape Communications Corporation.

All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.

9033630 i

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.

INDUSTRY CANADA 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 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.

SAFETY INFORMATION

CLASS 1 LASER TRANSCEIVERS

The VH-4802 48-port switch uses Class 1 Laser transceivers. Read the following safety information
before installing or operating these modules.

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:

ii 9033630

Notice

• 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

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

3

or 8 x 10

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
switch.

W m2 sr-1.

-6

watts.

WARNING: FIBER OPTIC PORT SAFETY

When using a fiber optic port, never look at the transmit laser while it is
powered on. Also, never look directly at the fiber TX port and fiber cable
ends when they are powered on.

-2

AVERTISSMENT: PORTS POUR FIBRES OPTIQUES -

SÉCURITÉ SUR LE PLAN OPTIQUE

Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais
directement le port TX (Transmission) à fibres optiques et les embouts de
câbles à fibres optiques tant qu'ils sont sous tension.

WARNHINWEIS: FASEROPTIKANSCHLÜSSE -

OPTISCHE SICHERHEIT

Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist.
Niemals direkt auf den Faser-TX-Anschluß und auf die Faserkabelenden
schauen, während diese eingeschaltet sind.

9033630 iii

Notice

SAFETY INFORMATION

WICHTIGE SICHERHEITSHINWEISE (GERMANY)

1. Bitte lesen Sie diese Hinweise sorgfältig durch.

2. Heben Sie diese Anleitung für den späteren Gebrauch auf.

3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine Flüssigoder
Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur Reinigung.

4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.

5. Das Gerät ist vor Feuchtigkeit zu schützen.

6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen
könnte Beschädigungen hervorrufen.

7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.

8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.

9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch nichts
auf der Leitung abgestellt werden.

10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.

11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.

12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät
gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.

13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur von
authorisiertem Servicepersonal geöffnet werden.

14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer
qualifizierten Servicestelle zu überprüfen:

a. Netzkabel oder Netzstecker sind beschädigt.

b. Flüssigkeit ist in das Gerät eingedrungen.

c. Das Gerät war Feuchtigkeit ausgesetzt.

d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit Hilfe

dieser Anleitung keine Verbesserung erzielen.

e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.

f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.

15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen Nennstrom
bis 6A und einem Gerätegewicht größer 3kg ist eine Leitung nicht leichter als H05VV-F, 3G,

2

0.75mm

einzusetzen.

Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder
weniger.

iv 9033630

Notice

ENTERASYS NETWORKS, INC.

PROGRAM LICENSE AGREEMENT

BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,

CAREFULLY READ THIS LICENSE AGREEMENT.

This document is an agreement (“Agreement”) between You, the end user, and Enterasys Networks,
Inc. (“Enterasys”) that sets forth your rights and obligations with respect to the Enterasys software
program (“Program”) in the package. The Program may be contained in firmware, chips or other
media. 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 AGREEMENT, RETURN THE UNOPENED PRODUCT TO
ENTERASYS OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS FOLLOWING THE DATE
OF RECEIPT FOR A FULL REFUND.

IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT ENTERASYS
NETWORKS [phone]. Attn: Legal Department.

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 Enterasys.

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.

4. EXPORT REQUIREMENTS. You understand that Enterasys and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, which
prohibit export or diversion of certain technical products to certain countries, unless a license to
export the product is obtained from the U.S. Government or an exception from obtaining such license
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If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.

If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in
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Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other
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or E:2 (as defined herein) the direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete plant or any major
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component thereof, if such foreign produced direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.

9033630 v

Notice

5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i) was
developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data
belonging to Enterasys and/or its suppliers. For Department of Defense units, the Product is
considered commercial computer software in accordance with DFARS section 227.7202-3 and its
successors, and use, duplication, or disclosure by the Government is subject to restrictions set forth
herein.

6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Enterasys in
writing, Enterasys makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).

ENTERASYS DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO

YOU BY ENTERASYS IN WRITING, EITHER EXPRESS 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.

7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
ENTERASYS 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 ENTERASYS PRODUCT, EVEN IF ENTERASYS 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 IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.

vi 9033630

DECLARATION OF CONFORMITY

Application of Council Directive(s): 89/336/EEC

73/23/EEC

Manufacturer’s Name: Enterasys Networks, Inc.

Manufacturer’s Address: 35 Industrial Way

PO Box 5005
Rochester, NH 03867

European Representative Name: Mr. J. Sims

European Representative Address: Enterasys Networks Limited

Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG14 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.

Notice

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. Thomas Whissel Mr. J. Sims

___________________________________ ___________________________________

Full Name Full Name

Compliance Engineering Manager Managing Director - E.M.E.A.

___________________________________ ___________________________________

Title Title

Rochester, NH, USA Newbury, Berkshire, England

___________________________________ ___________________________________

Location Location

9033630 vii

Notice

viii 9033630

TABLE OF CONTENTS

PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XI

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Other Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii

Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii

1. PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Optional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Frame Buffering and Frame Latency. . . . . . . . . . . . . . . . . . . . . . . . 7

Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Non-Volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Configuration and Management Interfaces . . . . . . . . . . . . . . . . . . . 8

RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

BootP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Full Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Port Trunking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Client/Server Network Application . . . . . . . . . . . . . . . . . . . . . . . . . 15

Local Backbone Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . . 18

Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Installing an Optional Module into the Switch . . . . . . . . . . . . . . . . . . . . 20

Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . . 21

Console Port (Out-of-Band) Connections . . . . . . . . . . . . . . . . . . . 21

9033630 Table of Contents ix

Remote Management via the Console Port . . . . . . . . . . . . . . . . . 22

In-Band Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Powering the Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

100Base-FX/1000Base-SX/LX Fiber Ports . . . . . . . . . . . . . . . . . . . . . 26

APPENDIX A. TECHNICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . 27

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Regulatory Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . 29

MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . 30

Power Cord Set Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 31

APPENDIX B. FLOW CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

APPENDIX C. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . 35

INDEX

x Table of Contents VH-4802

PREFACE

Purpose

This guide provides information about the features and applications of the
Enterasys Networks Vertical Horizon VH-4802 switch system.

Audience

This guide is intended for Ethernet Local Area Network (LAN)
administrators and Management Information Systems (MIS) personnel
with the following background:

• Working knowledge of Ethernet LANs

• Familiarity with Transmission Control Protocol/Internet Protocol

(TCP/IP) and Simple Network Management Protocol (SNMP)

Conventions

This section describes the conventions used in this guide.

Message Formats

Two types of messages, identified by icons, appear in the text:

A note informs you of special circumstances.

A caution indicates the possibility of equipment damage.

Keyboard Entries

This guide uses the following conventions for keyboard entries:

• When you read “enter,” type the text and press the [Enter] key.

• Example: Enter the Gateway IP address and press the [Enter] key.

• When you read “select,” highlight the menu item and press the [Enter]

key.

9033630 Preface xi

Other Conventions

This guide uses the following typographical conventions:

• Initial Caps Menu titles and console menu selections.

• [Enter] Used to designate the Enter or Return key.

• courier font Screen messages and user prompts.

• Selection Describes a user-configurable user interface item.

• Field Describes a read-only information item.

Organization

Chapter 1. Product Overview: Describes the features of the switch, front

and rear panel components and application examples.
Chapter 2. Installation: Describes the content of your switch shipment,

lists site requirements, and provides mounting instructions. Instructions
for making connections and powering up the switch are provided as well.

Appendix A. Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational
specifications.

Appendix B. Flow Control: Describes how the flow control features are
used to provide a mechanism for protecting the switch from overload
conditions and to keep additional traffic off the network.

Appendix C. Acronyms and Abbreviations: Provides definitions for a
list of common acronyms and abbreviations used within the installation
guide and the networking industry.

xii Preface VH-4802

1. PRODUCT OVERVIEW

This chapter provides the following information:

• Product Description

• Features

• Front and Rear Panel Component Descriptions

• Feature Summaries

• Application Example

Description

This installation guide describes Enterasys Networks’ Vertical Horizon
VH-4802 Fast Ethernet switch. The switch provides 48
10Base-T/100Base-TX ports, plus two slots for optional slide-in
100Base-FX, 1000Base-SX or 1000Base-LX modules. There is also a
fixed SNMP-based management card included in the switch. This
management card supports both in-band and out-of-band access for
managing the switch.

The switch employs a high-speed switching fabric. This design allows for
simultaneous transport of multiple packets at low latency on all ports. It
also uses store-and-forward switching to ensure maximum data integrity.
In this mode, the entire packet must be received into a port buffer and
checked for validity before being forwarded. This prevents errors from
being propagated throughout the network. This switch also features full­duplex capability on all ports, which effectively doubles the bandwidth of
each connection.

The switch can connect up to 48 end-node workstations or servers using
its 10Base-T/100Base-TX ports. Moreover, you can use a 100 Mbps fiber
module for connecting to a remote site, or a Gigabit module for a high­speed backbone connection.

The RMON/SNMP/Web management card provides a broad range of
management options. It includes a standards-compliant Simple Network
Management Protocol (SNMP) agent. The SNMP agent allows network
management station applications to collect and present status and
performance information about the switch, as well as providing the ability
to configure and control functions in the switch. The management card
also supports Remote Monitoring (RMON) for Statistics, History, Alarm
and Event groups (Groups 1-3, 9).

Network management can be performed in-band using a TCP/IP or Telnet
connection to the switch.
provides management
Netscape Navigator and Microsoft’s Internet Explorer. In addition, the
console port allows out-of-band management using a PC, terminal, or
modem connection.

This card also includes a built-in Web agent that

access via common http browsers such as

9033630 Product Overview 1

The VH-4802 switch is desktop or rack-mountable. LEDs on the front
panel provide information about the operating status of the switch. The
rear panel contains the power connector, redundant power connector,
serial console port, and two slots for the optional modules. The side panel
includes two fans that maintain ventilation and cooling for internal switch
components.

Features

• Ports:

• Optional Media Modules:

- 48 dual-speed 10Base-T/100Base-TX ports using RJ-45
connectors (MDI-X)

- 2 slots for optional modules

- 1 serial console port

- 1 redundant power unit socket

- VHIM1000-S1SX: 1000Base-SX module provides 1 SC multi­mode fiber optic port for an uplink connection to the switch

- VHIM1000-S1LX: 1000Base-LX module provides 1 SC single­mode fiber optic port for an uplink connection to the switch

- VHIM100-S2MFX: 100Base-FX module provides 2 SC multi­mode fiber optic ports for an uplink connection to the switch

- VHIM100-S1SFX: 100Base-FX module provides 1 SC single­mode fiber optic port for an uplink connection to the switch

Additional interface modules may be added without notice.

• Switch Architecture:

- 6 controllers with 8 10/100 ports

- IEEE 802.3u auto-negotiation of half/full-duplex operation on
all RJ-45 ports

- 512 KB packet buffering for 10/100 ports, 2 MB packet
buffering for 1000 ports

- Store-and-forward switching

-

12K address forwarding table

- Forwarding: 14,880 packets-per-second (64 byte packets)
@10 Mbps; 148,800 pps @100 Mbps; 1,488,000 pps @1000
Mbps

- Filtering: 14,880 packets-per-second (64 byte packets) @10
Mbps; 148,800 pps @100 Mbps; 1,488,000 pps @1000 Mbps

2 Product Overview VH-4802

• Network Management:

- SNMP compliant agent: MIB II (RFC 1213); Bridge MIB (RFC

1493); Ethernet-like MIB (RFC 1643); RMON - Statistics,
History, Alarm and Event groups (RFC 1757); Interface
Evolution MIB (RFC 1573); Q-MIB (IEEE 802.1Q); private MIB
extensions

- Access via in-band, Internet browser, or Telnet

- Console port (RS-232, male DB-9 connector, null modem)
supports access via direct or modem connection

- BootP for IP address configuration

• Reliability:

- Redundant power supply support

• Software:

- Diagnostics for product testing and troubleshooting

- Firmware upgrades using the console port or in-band with
TFTP

• LED Indicators:

- System: Power, RPU, Management

- 10Base-T/100Base-TX ports: link/speed/disable,
mode (flow control, full duplex, activity)

- Media module ports: Status, Activity

9033630 Product Overview 3