Allied Telesis AT-8126XL User Manual
◆
Installation
Fast Ethernet
®
Switches
AT-8118
AT-8124XL
AT-8126XL
Guide
PN 613-10726-00 Rev C
Copyright 1998-1999 Allied Telesyn International, Corp.
960 Stewart Drive Suite B, Sunnyvale, CA 94086 USA
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International,
Corp.
CentreCom is a registered trademark of Allied Telesyn International, Corp.
All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of
their respective owners.
Allied Telesyn International, Corp. reserves the right to make changes in specifications and other information contained in this
document without prior written notice. The information provided herein is subject to change without notice. In no event shall Allied
Telesyn International, Corp. be liable for any incidental, special, indirect, or consequential damages whatsoever, including but not
limited to lost profits, arising out of or related to this manual or the information contained herein, even if Allied Telesyn International,
Corp. has been advised of, known, or should h ave known, the p ossibility of such damages .
Radiated Energy
Standards
Radiated Energy
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 generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with this instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
Note: Modifications or changes not expressly approved by the manufacturer or the FCC can void your right to operate this
equipment.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
RFI Emission EN55022 Class
WAR NI NG
adequate measures.
Immunity EN50082-
IMPORTANT
Appendix A for the translated safety statement in your language.
: This product meets the following standards
U.S. Federal Communications Commission
Canadian Department of Communications
! 1
: In a domestic environment this product may cause radio interference in which case the user may be required to take
! 2
! 3
: Appendix A contains translated safety statements for installing this equipment. When you see the
!, go to
WICHTIG
Anhang A den übersetzten Sicherheitshinweis in Ihrer Sprache nach.
VIGTIGT
De slå op i tillæg A og finde de oversatte sikkerhedsadvarsler i Deres eget sprog.
BELANGRIJK
ziet, raadpleeg Appendix A voor vertaalde veiligheidsinstructies in uw taal.
IMPORTANT
symbole
TÄRKEÄÄ
turvaohjetta liitteestä A.
IMPORTANTE
indica di consultare l’Appendice A per l’avviso di sicurezza nella propria lingua.
VIKTIG
for å finne den oversatte sikkerhetsinformasjonen på ønsket språk.
IMPORTANTE
!
IMPORTANTE
símbolo
OBS
till Bilaga A för att läsa det översatta säkerhetsmeddelandet på ditt språk.
: Anhang A enthält übersetzte Sicherheitshinweise für die Installation dieses Geräts. Wenn Sie
: Tillæg A indeholder oversatte sikkerhedsadvarsler, der vedrører installation af dette ud styr. Når De ser symbolet
: Appendix A bevat vertaalde veiligheidsopmerkingen voor het installeren van deze apparatuur. Wanneer u de
: L'annexe A contient les instructions de sécurité relatives à l'installation de cet équipement. Lorsque vous voyez le
!
, reportez-vous à l'annexe A pour consulter la traduction de ces instructions dans votre langue.
: Liite A sisältää tämän laitteen asentamiseen liittyvät käännetyt turvaohjeet. Kun näet
: l’Appendice A contiene avvisi di sicurezza tradotti per l’installazione di questa apparecchiatura. Il simbolo
: Tillegg A inneholder oversatt sikkerhetsinformasjon for installering av dette utstyret. Når du ser
, leia a advertência de segurança traduzida no seu idioma no Anexo A.
: O Anexo A contém advertências de segurança traduzidas para instalar este equipamento. Quando vir o símbolo
: El Apéndice A contiene mensajes de seguridad traducidos para la instalación de este equipo. Cuando vea el
!, vaya al Apéndice A para ver el mensaje de seguridad traducido a su idioma.
! Bilaga A innehåller översatta säkerhetsmeddelanden avseende installationen av denna utrustning. När du ser
! sehen, schlagen Sie in
!
-symbolin, katso käännettyä
!
, åpner du til Tillegg A
!, skall du gå
!, skal
!
!
,
iii
Ta ble of Contents
Preface
Purpose of This Guide ............................................................................................................................................................................Preface-i
How This Guide is Organized ..............................................................................................................................................................Preface-i
Document Conventions ......................................................................................................................................................................Preface-ii
Where to Find Related Guides ..........................................................................................................................................................Preface-iii
Chapter 1
Hardware Description
The Base Switch Models ..................................................................................................................................................................................1-1
Hardware Features ............................................................................................................................................................................................1-3
Network Management Features ...................................................................................................................................................................1-4
Switching Modes ................................................................................................................................................................................................1-5
Physical Description ..........................................................................................................................................................................................1-6
The Media Dependent Adapters (MDAs) ..................................................................................................................................................1-9
Where to Go Next .............................................................................................................................................................................................1-11
Chapter 2
Installation
Verifying Your Switch Package Contents .................................................................................................................................................. 2-1
Safety Information .............................................................................................................................................................................................2-2
Preparing the Site ..............................................................................................................................................................................................2-3
Installing the Switch on the Desktop .......................................................................................................................................................... 2-4
Installing the Switch in the Rack ................................................................................................................................................................... 2-5
Installing the Media Dependent Adapters (MDAs) ................................................................................................................................2-7
Setting Up The Terminal for Local Management Using Omega .....................................................................................................2-10
Connecting Devices to the Switch .............................................................................................................................................................2-11
Where to Go Next .............................................................................................................................................................................................2-12
.......................................................................................................................................................................................................Preface-i
...................................................................................................................................................................................1-1
Port LEDs ...................................................................................................................................................................................................... 1-7
RS232 Connector....................................................................................................................................................................................... 1-7
Reset Button................................................................................................................................................................................................ 1-7
System LEDs ................................................................................................................................................................................................ 1-8
AC Power Connector................................................................................................................................................................................ 1-8
..........................................................................................................................................................................................................2-1
MDA Package Contents .......................................................................................................................................................................... 2-7
MDA Installation ........................................................................................................................................................................................ 2-7
v
Chapter 3
Troubleshooting
...............................................................................................................................................................................................3-1
At the First Sign of a Problem ........................................................................................................................................................................3-1
Network Cabling Problems .............................................................................................................................................................................3-2
Calling Technical Support ...............................................................................................................................................................................3-3
How the Switch Reports Problems ...............................................................................................................................................................3-4
Common Problems ............................................................................................................................................................................................3-5
Link/Receive LED on Any Port is OFF.................................................................................................................................................. 3-5
Power LED is OFF ....................................................................................................................................................................................... 3-6
Fault LED is ON ........................................................................................................................................................................................... 3-6
Chapter 4
Switch Configurations
...................................................................................................................................................................................4-1
The Switch in a Standalone Configuration ................................................................................................................................................4-1
The Switch in Workgroup Configurations .................................................................................................................................................4-2
Appendix A
Translated Safety Information
................................................................................................................................................................. A-1
Appendix B
Technical Specifications
...............................................................................................................................................................................B-1
Appendix C
Switch Default Settings
................................................................................................................................................................................ C-1
vi
Preface
Purpose of This Guide
This guide is written for network administrators who are responsible
for installing and maintaining the AT-8118, AT-8124XL, and
AT-8126XL switches.
How This Guide is Organized
This guide consists of the following sections:
Chapter 1,
functions of the switches and the media dependent adapters
(MDAs).
Chapter 2,
switch and the MDAs, connecting a terminal for local management,
and connecting devices to the switch.
Chapter 3,
switch in case of problems.
Chapter 4,
switch configurations.
Appendix A,
of the safety warnings documented throughout this guide.
Appendix B,
switch and MDA specifications.
Hardware Description
Installation
Troubleshooting
Switch Configurations
Translated Safety Information
Technical Specifications
, describes the procedures for installing the
, describes the features and
, describes how to troubleshoot the
, presents illustrations of several
, presents in tabular form
, contains translations
Preface-i
Preface
Appendix C,
software settings as configured by the factory.
Index
Document Conven tions
The conventions used in this guide are as follows:
Note
A note provides additional information.
Warning
A warning indicates that performing or omitting a specific action
may result in bodily injury.
Switch Default Settings
, lists the switch’s default
, at the end of this guide, is according to subject matter.
❑
Notes:
❑
Warnings:
❑
Cautions:
Caution
A caution indicates that performing or omitting a specific action
may result in equipment damage or loss of data.
Preface-ii
Where to Find Related Guides
Allied Telesyn wants our customers to be well informed by providing
the most up-to-date and most easily accessible way to find our
guides and other technical information.
AT-8118, AT-8124XL, and AT-8126XL Installation Guide
Visit our website at:
www.alliedtelesyn.com
and download the
following guide:
AT-S21 Software Management User’s Guide
AT-8118, AT-8124XL, and AT-8126XL Installation Guide
, 613-10727-00
,
613-10726-00
The following guides are shipped with their respective products:
AT-8118, AT-8124XL, and AT-8126XL Quick Install Guide
613-10729-00
AT-8118, AT-8124XL, and AT-8126XL Translated Safety
Information Booklet
, 613-10728-00
AT-A10, AT-A11, AT-A20, and AT-A21 Quick Install Guide
613-10742-00
,
,
Preface-iii
Chapter 1
Hardware Description
This chapter describes the hardware features of the following
products:
" The base switch models: AT-8118, AT-8124XL, and AT-8126XL
" The uplink options, also called media dependent adapters
(MDAs): AT-A10, AT-A11, AT-A20, and AT-A21
The Base Switch Models
The AT-8118, AT-8124XL, and AT-8126XL switches are standalone
managed Fast Ethernet switches that provide 16 or 24 10Base-T/
100Base-TX station ports. The AT-8118 and AT-8126XL additionally
provide uplink options of up to two 100Base-TX or 100Base-FX (SC,
MT-RJ or VF-45) ports for backbone connectivity
They are primarily intended for connections to the desktop as well as
workgroup applications. The AT-8118 and AT-8126XL, when
populated with optional uplink ports, implement direct high-speed
server and backbone connections. Half- or full-duplex capability on
all ports eliminate collisions and provide up to 200 Mbps of
bandwidth per port to servers, routers, and other switches. The autonegotiating ports allow connectivity between devices operating at
10 Mbps and 100 Mbps speeds.
With built-in management, the switches provide seamless
management capability such as SNMP and web-based management.
1-1
Hardware Description
Uplink slots (Port A and Port B)
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
AB
Figure 1-1 shows the AT-8118, a 16-port model with two slots for
uplink options
MDA
1X 3X 5X 7X
2X 4X 6X 8X
10BASE-T / 100BASE-TX
9X 11X 13X 15X
10X 12X 14X 16X
PORT ACTIVITY
LINK / RECEIVE
100M
1 3 5 7 9 11 13 15
2BA 4 6 8 10 12 14 16
RS-232
TERMINAL PORT
STATUS
FAULT
POWER
RESET
Figure 1-2 shows the AT-8124XL, a 24-port model with no uplink
options.
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
Figure 1-3 shows the AT-8126XL, a 24-port model with two uplink
options.
Uplink slots (Port A and Port B)
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
AB
MDA
1X 3X 5X 7X
2X 4X 6X 8X
1X 3X 5X 7X
2X 4X 6X 8X
Figure 1-1
10BASE-T / 100BASE-TX
9X 11X 13X 15X 17X 19X 21X 23X
10X 12X 14X 16X 18X 20X 22X 24X
Figure 1-2
10BASE-T / 100BASE-TX
9X 11X 13X 15X
10X 12X 14X 16X
The AT-8118 Switch (Front)
The AT-8124XL Switch (Front)
17X 19X 21X 23X
18X 20X 22X 24X
PORT ACTIVITY
LINK / RECEIVE
100M
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
PORT ACTIVITY
LINK / RECEIVE
100M
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
BA
RS-232
TERMINAL PORT
TERMINAL PORT
RS-232
STATUS
FAULT
POWER
RESET
STATUS
FAULT
POWER
RESET
1-2
Figure 1-3
The AT-8126XL Switch (Front)
Hardware Features
AT-8118, AT-8124XL, and AT-8126XL Installation Guide
Table 1-1 summarizes the basic features of each switch model.
Table 1-1
Switch Models
Model Port Description
AT-8124XL Twenty-four 10Base-T/100Base-TX ports
"
AT-8118
Sixteen 10Base-T/100Base-TX ports
"
Two slots, Port A and Port B, for optional uplink
connectivity to either 100Base-TX or 100Base-FX
backbones
"
AT-8126XL
Twenty-four 10Base-T/100Base-TX ports
"
Two slots, Port A and Port B, for optional uplink
connectivity to either 100Base-TX or 100Base-FX
backbones
The switches have the following common hardware features:
" Half- or full-duplex operation on all switched ports delivering
up to 200 Mbps of bandwidth to servers, routers, or other
switches
" Auto-negotiation on all 10Base-T/100Base-TX ports for speed
and duplex in compliance with IEEE 802.3U specifications
" Non-blocking, clear-channel architecture delivers wire-speed
switching and up to 2.7 Gbps aggregate bandwidth for
exceptional performance
" Shared memory architecture per 4 ports to support 256
maximum-size packets
" Store-and-forward switching mode, or, for 100 Mbps ports
only, fragment-free cut-through switching mode
" Packet buffer memory of 3.0 MB for the AT-8118, 3.5 MB for the
AT-8124XL, and 3.5 MB for the AT-8126XL
" 16K MAC addresses per switch; automatic aging
" 8 MB DRAM and 2 MB Flash memory for software upgrades
" In-band Telnet capability for remote switch management
" Pre-installed management software, Omega (model AT-S21)
1-3
Hardware Description
" Out-of-band capability with RS232 connector for local switch
management
" Port-based Virtual LANs (VLANs)
" BootP and DHCP support
Network Management Features
The following lists the switches’ network management features.
" SNMP Management Information Base (MIB) II, SNMP MIB
extensions, Bridging MIB (RFC 1493), and Telnet support
deliver comprehensive in-band management
" Local Omega, a menu-based management console, provides
detailed out-of-band management
" Management through a web browser
" IEEE 802.1d Spanning Tree Protocol support for redundant
backbone connections and loop-free networks simplifies
configuration and improves fault tolerance
For detailed information concerning software and management
features, see the
located on Allied Telesyn’s website at
AT-S21 So ft ware Mana gement Use r’s Guide
www.alliedtelesyn.com
.
1-4
Switching Modes
AT-8118, AT-8124XL, and AT-8126XL Installation Guide
Each switch port has the following user-selectable switching modes:
" Store-and-forward (default)
" Fragment-free cut-through for 100 Mbps ports
Network administrators can configure the sending port with the
appropriate switching mode to optimize performance and enable
full-error checking. The modes reduce network bottlenecks by
offering low latency wire rate switching for the port.
With the store and forward method, the port waits to receive an
entire packet before forwarding it to its destination. This method
ensures that packets being forwarded are free of errors. The store
and forward mode (default) is automatic when data is exchanged
between 10Base-T and 100Base-TX ports.
With the cut-through method (for 100 Mbps ports only), the port
starts to forward the packet once the packet has exceeded the
smallest size (64 bytes), therefore filtering fragment frames or runts
(frames less than 64 bytes). This method provides low latency for
forwarding frames and also provides some network error protection.
1-5
Hardware Description
Physical Description
The switches have the following major front panel components:
" 16 or 24 Ethernet 10Base-T/100Base-TX unshielded twisted
pair (RJ45) ports
" RS232 (DB9-F) connector for out-of-band management
(Omega Local)
" Reset button
" System and port status LEDs
" Two slots, Port A and Port B, for optional 100Base-TX or
100Base-FX (SC, MT-RJ or VF-45) backbone connectivity on the
AT-8118 or AT-8126XL
Refer to Figure 1-4 for the location of front panel components.
Media Dependent Adapters (optional)
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
AB
AT-A10
100BASE-TX
X
MDA
AT-A10
100BASE-TX
X
1X 3X 5X 7X
2X 4X 6X 8X
Auto-negotiating 10Base-T/100Base-TX Ports
Figure 1-4
Fault LED Reset Button
RS-232
10BASE-T / 100BASE-TX
9X 11X 13X 15X
10X 12X 14X 16X
PORT ACTIVITY
LINK / RECEIVE
100M
1 3 5 7 9 11 13 15
2BA 4 6 8 10 12 14 16
TERMINAL PORT
STATUS
FAULT
POWER
RESET
Power LED
Port LEDs
RS232 Connector
The AT-8118 Switch With Fully-Populated Uplink Slots
1-6
AT-8118, AT-8124XL, and AT-8126XL Installation Guide
Port LEDs
Each switch port and uplink port is associated with two LEDs
indicating the following:
" Valid physical link with a device and packets being received, as
" Speed of transmission, 10 Mbps or 100 Mbps, as indicated by
Figure 1-5 is a closeup of the AT-8118’s port LEDs. (The
AT-8126XL is similar to the AT-8118. The AT-8124XL does not
have Uplink Port LEDs.)
15X
Link and Received Packets LED (Green)
Transmission Speed LED (Amber)
indicated by the top row of LEDs
the bottom row of LEDs
PORT ACTIVITY
LINK / RECEIVE
100M
1 3 5 7 9 11 13 15
TERM
16X
RS232 Connector
Reset Button
2BA 4 6 8 10 12 14 16
Uplink Port LEDs Station Port LEDs
Figure 1-5
Port LEDs
The LEDs are further described in Chapter2, T able 2-1 on page 2-4.
The RS232, DB-9 female connector provides out-of-band local
management via a VT100 terminal or MS-Windows’ VTERM terminal
emulation using a straight-through cable.
The Reset button is used to reset the switch with power still applied.
It is mainly used for diagnostics or resetting switch statistics as
recorded by the manage ment softwa re, Om ega. You can also r es et
the switch via the software. Download the
Management User’s Guide
www.alliedtelesyn.com
from the web a
for more information.
AT-S21 Software
1-7
Hardware Description
System LEDs
AC Power
Connector
The switch’s system LEDs are Power and Fault. They indicate the overall operating status of the switch.
More details on the LEDs are shown in Table 2-1,
Switch LEDs
, on
page 2-4.
The switch has a single power supply in the rear panel, which has
autoswitch AC inputs. The input voltage range is from 100-240 VAC,
50/60 Hz.
1-8
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