Allied Telesis AT-8324 User Manual

!

Installation

Fast Ethernet

®

Switches

AT-8316F/MT
AT-8316F/VF
AT-8316F/SC
AT-8324

Guide

PN 613-10813-00 Rev B

Copyright  2003 Allied Telesyn, Inc.
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, Inc.
CentreCom is a registered trademark of Allied Telesyn, Inc.
All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of

their respective owners.
Allied Telesyn, Inc. reserves the right to make changes in specifications and other information contained in this document without

prior written notice. The informati on provided h erein is su bject to cha nge without n otice. In n o event sha ll Allied Telesyn, Inc. 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, Inc. has been advised of, known, or should have
known, the possibility of such damages.

Electrical Safety and Emission Compliance
Statement

STANDARDS: This product meets the following standards

U.S. Federal Communications Commission

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 int erfer enc e to radio comm unication s. 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.

Industry Canada

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 A
WARNING: In a domestic environment this product may cause radio interference in which case the user may be required t o take

adequate measures.
Immunity EN50082-1 1997
Electrical Safety EN60950, UL 1950, CSA 950
Laser EN60825

IMPORTANT: Appendix A contains translated safety statements for installing this equipment. When you see the ", go to Appendix A
for the translated safety statement in your language.

WICHTIG: Anhang A enthält übersetzte Sicherheitshinweise für die Installation dieses Geräts. Wenn Sie
Anhang A den übersetzten Sicherheitshinweis in Ihrer Sprache nach.

VIGTIGT: Tillæg A indeholder ove rsatte sikkerhedsadvarsler, der vedrører installation af dette udstyr. Når De ser symbolet
slå op i tillæg A og finde de oversatte sikkerhedsadvarsler i Dere s eget sprog.

BELANGRIJK: Appendix A bevat vertaalde veiligheidsopmerkingen voor het installeren van deze apparatuur. Wanneer u de
raadpleeg Appendix A voor vertaalde veiligheidsinstructies in uw taal.

IMPORTANT : L'annexe A contient les instructions de sécurité relatives à l'installation de cet équipement. Lorsque vous voyez le
symbole

", reportez-vous à l'annexe A pour consulter la traduction de ces instructions dans votre langue.

TÄRKEÄÄ: Liite A sisältää tämän laitteen asentamiseen liittyvät käännetyt turvaohjeet. Kun näet
turvaohjetta liitteestä A.

IMPORTANTE: l’Appendice A contiene avvisi di sicurezza tradotti per l’ins tallaz ione di questa apparecchiatura. Il simbolo
di consultare l’Appendice A per l’avviso di sicurezza nella propria lingua.

VIKTIG: Tillegg A inneholder oversatt sikkerhetsinformasjon for installering av dette utstyret. Når du ser
å finne den oversatte sikkerhetsinformasjonen på ønsket språ k.

" 2

" 1

" 3

" 4

" 5

" sehen, schlagen Sie in

", skal De

" ziet,

"-symbolin, katso käännettyä

", indica

", åpner du til Tillegg A for

IMPORTANTE: O Anexo A contém advertências de segurança traduzidas para instalar este equipamento. Quando vir o símbolo
leia a advertência de segurança traduzida no seu idioma no Anexo A.

IMPORT ANTE: El Apéndice A contiene mensajes de seguridad traducidos para la instalación de este equipo. Cuando vea el símbolo

",

", vaya al Apéndice A para ver el mensaje de seguridad traducido a su idioma.

OBS! Bilaga A innehåller översatta säkerhetsmeddelanden a vseende installationen av den na utrustning. När du ser
Bilaga A för att läsa det översatta säkerhetsmeddelandet på ditt språk.

", skall du gå till

3

Table of Contents

Preface ......................................................................................................................................................................................................................7

Purpose of This Guide ... .................................................. ......................................................................................................................................7

How This Guide is Organiz ed ................................................................................ .............................................................................................7

Document Conventions ......................................................................................................................................................................................8

Where to Find Related Guides ..................................................... ......................................................................................................................9

Chapter 1

Hardware Description .....................................................................................................................................................................................11

The Switch Models . ..............................................................................................................................................................................................12

Features and Components ...............................................................................................................................................................................13

Physical Description ............................................................................................................................................................................................14

Data Ports ................................................................................................................................................................................................................15

Switch LEDs ............................................................................................................................................................................................................16

RS232 Connector ..................................................................................................................................................................................................18

Stacking Ports ........................................................................................................................................................................................................19

Stacking Module Expansio n Slo t ....................................................................................................................................................................20

Stack ID Switch ............................................................................................... .......................................................................................................20

Expansion Module Slots ....................................................................................................................................................................................21

Optional Expansion Mo du le s................................................................................................. ................................................................. 21

R.P.S Input Connector ................................................................. ........................................................................................................................23

Reset Button ...........................................................................................................................................................................................................24

AC Power Connector ...........................................................................................................................................................................................25

AT-S25 Management Software and Omega Management Interface ......... .......................................................................................25

Network Topology ...............................................................................................................................................................................................26

Where to Go Next ................................................ .................................................................................................................................................28

Chapter 2

Planning the Installation ...............................................................................................................................................................................29

AT-8316F and AT-8324 Switch Cabling Specifications .................... .......................................................................................................30

Switch Stacks .........................................................................................................................................................................................................31

Stack of Two or Three Switc hes....................................... ....................................................................................................................... 3 1

Stack of Four to Eight Switches.................................................................................................................. ............................................ 32

Expansion Modules .............................................................................................................................................................................................33

Port Trunking .........................................................................................................................................................................................................35

Guideline 1: Number of Port s in a Tru nk............................................................................................................................................. 35

Guideline 2: Using Ports from the Same Group .............................................. ................................................. ................................ 35

Guideline 3: Creating Onl y One Trunk Per Group................................................................................................ ............................ 36

Guideline 4: Using Consecu ti v e Ports.. .................................................. .................................................. ............................................ 36

5

Guideline 5: Cabling Based on Port Number..................................................................................................................................... 37

Guideline 6: Using Expansio n M odules.... ........................................................................................................................................... 37

Where to Go Next ................................................ .................................................................................................................................................38

Chapter 3

Installing the Switch .........................................................................................................................................................................................39

Verifying the Package Contents .....................................................................................................................................................................40

Reviewing Safety Precaut io ns .... .....................................................................................................................................................................41

Selecting a Site for the Switc h ............................. ............................................................................................................................................42

Installing the Switch as a Standalone Unit ............................................... ...................................................................................................43

Installing the Switch in a Rack ......................................... ................................................................................................................................45

Building a Stack of Two Switche s ....................... ............................................................................................................................................46

Building a Stack of Three Switc he s ........................ ........................................................................................................................................49

Building a Stack of Four to Eight Swit che s .................................................................................................................................................52

Powering On a Stack . ................................................................................................... .......................................................................................57

Setting Up a Terminal for Loc a l M anagement ...........................................................................................................................................59

Installing an Expansion Module ......................................................................................................................................................................60

Resetting a Stack .................... ..............................................................................................................................................................................62

Where to Go Next ................................................ .................................................................................................................................................63

Chapter 4

Troubleshooting ................................................................................................................................................................................................65

At the First Sign of a Proble m .................................. ................................................. .......................................................................................66

Network Cabling Proble ms ...................... ........................................................................... ..............................................................................67

Calling Technical Suppo rt ........................ ........................................................................... ..............................................................................67

How the Switch Reports Problems ................................................................................................................................................................68

Common Problems .............................................................................................................................................................................................70

Link /Activity LED on Any Port is OFF............................................................................................... .................................................... 70

Power LED is OFF......................................................................................................................................................................................... 71

Fault LED is ON........................................................................................................................ ..................................................................... 71

Appendix A

Translated Electrical Safety and Emission Information ..................................................................................................................73

Appendix B

Technical Specifications .................................................................................................................................................................................85

Appendix C

Switch Default Settings ..................................................................................................................................................................................89

Index ........................................................................................................................................................................................................................91

6

Preface

Purpose of This Guide

This guide is intended for network administrators who are
responsible for installing and maintaining AT-8316F and AT-8324
Ethernet switches.

How This Guide is Organized

This guide contains the following chapters and appendices:
Chapter 1, Hardware Description, describes the features and

functions of the switches and the expansion modules. The chapter
also describes several network topologies that use the fast Ethernet
switches.

Chapter 2, Planning the Installation, contains cabling specifications
for the switches and expansion modules, and lists the rules to
observe when creating a port trunk.

Chapter 3, Installing the Switch, contains the procedures for
installing the switch, building a stack of switches, and installing the
expansion modu les.

Chapter 4, Troubleshooting, describes how to troubleshoot the
switch in case of a problem.

Appendix A, Translated Electrical Safety and Emission
Information, contains translations of the safety warnings
documented throughout this guide.

Appendix B, Technical Specifications, presents in tabular form
switch and expansion module specifications.

7

Preface

Appendix C, Switch Default Settings, lists the switch’s factory
default software settings.

An Index, at the end of this guide, is according to subject matter.

Document Conventions

The conventions used in this guide are as follows:

# Notes:

Note

A note provides additional information.

# Warnings:

Warning

A warning indicates that performing or omitting a specific action
may result in bodily injury.

# Cautions:

Caution

A caution indicates that performing or omitting a specific action
may result in equipment damage or loss of data.

8

Where to Find Related Guides

After you have performed the procedures in this guide and installed
the switch on your network, go to the Allied Telesyn web site at

www.alliedtelesyn.com and download the following guide:

AT-S25 Management Software User’s Guide

PN 613-10844-00
This manual explains how to use the Omega management software

and the AT-S25 software to configure and manage the device.

AT-8316F and AT-8324 Installation Guide

9

Chapter 1

Hardware Description

The AT-8316F and the AT-8324 switches are designed to provide
your network with Ethernet, Fast Ethernet, and Gigabit Ethernet
connectivity over fiber optic and twisted pair cabling.

The switches can operate as standalone units or can be
interconnected together through special stacking ports to form
logical switches. Logical switches, also referred to as s tacks, can make
it easier for you to manage your network because you can manage
all of the switches as one unit. Logical switches are also easy to
customize. You can add or remove switches from a logical switch so
that the unit always has the number and types of ports that your
network requires.

Two expansion slots on the front of the switches further add to the
flexibility of the systems. You can use the slots to install 10Base-T,
100Base-TX, 100Base-FX, and 1000Base-FX expansion modules.

This chapter describes the hardware features of the following
products:

# AT-8316F/MT switch
# AT-8316F/VF switch
# AT-8316F/SC switch
# AT-8324 switch
# The optional expansion modules: AT-A15/SX, AT-A15/LX,

AT-A16, AT-A17, AT-A18, and AT-A19

11

Hardware Description

The Switch Models

Table 1-1 lists the switch models.

Table 1-1 Switch Models

Model

1

Number of
Ports

Type of Port

Type of
Connector

Maximum Distance

AT-8316F/MT 16 100Base-FX MT-RJ 2 kilometers2 (1.25 miles)
AT-8316F/VF 16 100Base-FX VF-45 2 kilometers2 (1.25 miles)
AT-8316F/SC 16 100Base-FX SC 2 kilometers2 (1.25 miles)
AT-8324 24 10/100Base-TX RJ-45 100 meters (328 feet)

1. All models include two expansion slots.

2. Assumes 50/125 micron or 62.5/125 micron multimode fiber optic cabling and full-duplex operation.

Figure 1-1 shows the front panel of each switch.

100BASE-FX FAST ETHERNET SWITCH

A

L/A

L/A

L/A

L/A

L/A

D/C

D/C

B

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

D/C

D/C

D/C

100BASE-FX

L/A

L/A

L/A

L/A

L/A

L/A

D/C

D/C

D/C

D/C

D/C

D/C

L/A

L/A

L/A

D/C

D/C

D/C

AT-8316/MT

100BASE-FX FAST ETHERNET SWITCH

A

L/A

L/A

L/A

L/A

L/A

D/C

D/C

B

1234 5678 9101112 13141516

D/C

D/C

D/C

100BASE-FX

L/A

L/A

L/A

L/A

L/A

L/A

D/C

D/C

D/C

D/C

D/C

D/C

L/A

L/A

L/A

D/C

D/C

D/C

AT-8316F/VF

PORT ACTIVITY

L/A

ACTIVITY

100M LINK

D/C

FULL DUP

HALF DUP/ COL

L/A

L/A

D/C

D/C

PORT ACTIVITY

L/A

ACTIVITY

100M LINK

D/C

FULL DUP

HALF DUP/ COL

L/A

L/A

D/C

D/C

RS-232

TERMINAL PORT

RS-232

TERMINAL PORT

STATUS

FAULT
MASTER
RPS
PWR

RESET

STATUS

FAULT
MASTER
RPS
PWR

RESET

12

A

B

100BASE-FX FAST ETHERNET SWITCH

L/A

D/C

L/A

D/C

L/A

D/C

L/A

D/C

100BASE-FX

L/A

L/A

L/A

D/C

L/A

D/C

D/C

D/C

L/A

L/A

D/C

D/C

L/A

L/A

D/C

D/C

L/A

L/A

D/C

D/C

PORT ACTIVITY

87654321

L/A

D/C

L/A

RXTXRXTXRXTXRXTXRXTXRXTXRXTXRXTX

LINK / ACTIVITY
FULL DUP /

D/C

161514131211109

L/A

D/C

RXTXRXTXRXTXRXTXRXTXRXTXRXTXRXTX

AT-8316F/SC

10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH

A

B

1X 3X 5X 7X

2X 4X 6X 8X

10BASE-T / 100BASE-TX

9X 11X 13X 15X

10X 12X 14X 16X

17X 19X 21X 23X

18X 20X 22X 24X

PORT ACTIVITY

L/A

100M LINK / ACTIVITY 10M LINK / ACTIVITY

D/C

HALF DUP/

FULL DUP

1234567891011121314151617181920212223

L/A
D/C
L/A
D/C

AT-8324

Figure 1-1 AT-8316F and AT-8324 Swi tches

STATUS

RS-232

TERMINAL PORT

HALF DUP
COL

COL

FAULT
MASTER
RPS
PWR

RESET

STATUS

RS-232

TERMINAL PORT

FAULT
MASTER
RPS
PWR

24

RESET

Features and Components

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, workstations,
or other switches

# Auto-negotiation on all 10Base-T/100Base-TX ports for speed

and duplex in compliance with IEEE 802.3u specifications
(AT-8324 switch only)

# Non-blocking, clear-channel architecture delivers wire-speed

switching and up to 14 Gbps aggregate bandwidth

# Store-and-forward switching mode
# 8K MAC addresses per switch with automatic aging
# 4 MB SDRAM per eight 10Base-T/100Base-TX or 100Base-FX

ports

AT-8316F and AT-8324 Installation Guide

# 2 MB Flash memory for software upgrades
# In-band Telnet capability for remote switch management
# AT-S25 software and Omega management software
# Two stacking ports for interconnecting switches to create

logical switches

# One expansion slot for the optional AT-Stack8 Stacking Matrix

Module for creating logical switches of up to eight switches

# Two expansion slots for optional uplink expansion modules
# RS232 connector for local switch management
# IEEE 802.1Q compliant Virtual LAN (VLAN) tagging support
# IEEE 802.1P compliant Quality of Service
# Two priority queues/levels per-port based on tagging

information (IEEE 802.1P)

# IEEE 802.1d Spanning Tree Protocol
# SNMP Management Information Base (MIB) II, SNMP MIB

extensions, Bridge MIB (RFC 1493), Ethernet MIB (RFC 1643),
and Interface MIB (RFC 1573)

# BootP and DHCP support
# Port trunking for increased bandwidth to end nodes

13

Hardware Description

Physical Description

Figure 1-2 through Figure 1-4 illustrate the location of the switch
components.

Expansion Module Slots

Expansion Module Slots

Port LEDs

100BASE-FX FAST ETHERNET SWITCH

A

L/A

L/A

L/A

L/A

L/A

L/A

B

D/C

D/C

D/C

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

D/C

D/C

100BASE-FX

L/A

L/A

L/A

L/A

L/A

L/A

L/A

L/A

D/C

D/C

D/C

D/C

D/C

D/C

D/C

D/C

Sixteen 100Base-FX Ports

Figure 1-2 AT-8316F Switch (Model AT-8316F/MT)

10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH

A

1X 3X 5X 7X

B

2X 4X 6X 8X

10BASE-T / 100BASE-TX

9X 11X 13X 15X

10X 12X 14X 16X

17X 19X 21X 23X

18X 20X 22X 24X

L/A

L/A

D/C

D/C

D/C

RS232 connector

Port LEDs

L/A

100M LINK / ACTIVITY 10M LINK / ACTIVITY

D/C

FULL DUP

1234567891011121314151617181920212223

L/A
D/C
L/A
D/C

L/A

100M LINK

D/C

FULL DUP

PORT ACTIVITY

PORT ACTIVITY

HALF DUP/ COL

HALF DUP/

ACTIVITY

COL

24

Reset Button

STATUS

RS-232

TERMINAL PORT

FAULT
MASTER
RPS
PWR

System

LEDs

Reset Button

STATUS

RS-232

TERMINAL PORT

FAULT
MASTER
RPS
PWR

RESET

RESET

AC

Connector

R.P.S. Input

Connector

Twenty Four 10Base-T/100Base-TX Ports

RS232 connector

System

LEDs

Figure 1-3 AT-8324 Swi tch

STACK ID

IS-A IS-B

IS-A IS-B

Expansion Slot

Stacking Module

Stacking Ports

STACK ID

0

0

Stack ID

Switch

Figure 1-4 Switch Back Panel

14

Data Ports

AT-8316F and AT-8324 Installation Guide

Each model of the AT-8316F switch features 16 fiber optic ports with
either MT-RJ, VF-45, or SC fiber optic connectors. The ports offer
100Base-FX performance and half- or full-duplex operation. Each
port can operate up to a maximum distance of 2 kilometers (1.25
miles), assuming 50/125 micron or 62.5/125 micron multimode fiber
optic cabling and full-duplex operation.

The AT-8324 switch has 24 twisted pair ports with RJ-45 connectors.
The ports, which feature auto-negotiation on both speed and duplex
mode, can operate as either 10Base-T or 100Base-TX ports and in
half- or full-duplex mode.

15

Hardware Description

STATUS

RESET

FAULT
MASTER
RPS
PWR

RS-232

Switch LEDs

The Ethernet switch has a series of LEDs for monitoring the status of
the unit. There are system LEDs for monitoring the entire switch and
port LEDs for monitoring the individual data ports.

The system LEDs are Fault, Master, RPS (Redundant Power Supply),
and PWR. Figure 1-5 illustrates the location of the system LEDs. The
location of the system LEDs is the same on all switch models.

10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH

A

B

1X 3X 5X 7X

2X 4X 6X 8X

10BASE-T / 100BASE-TX

9X 11X 13X 15X

10X 12X 14X 16X

17X 19X 21X 23X

18X 20X 22X 24X

PORT ACTIVITY

L/A

100M LINK / ACTIVITY 10M LINK / ACTIVITY

D/C

HALF DUP/

FULL DUP

1234567891011121314151617181920212223

L/A
D/C
L/A
D/C

COL

STATUS

RS-232

TERMINAL PORT

FAULT
MASTER
RPS
PWR

24

RESET

Figure 1-5 System LEDs

Table 1-2 describes the system LEDs on the Ethernet switch.

Table 1-2 Switch System LED Status

LED State Description
Fault Solid Red The switch or management software is malfunctioning.

Flashing Red The switch is booting, running diagnostic tests, writing

messages to FLASH, or transferring files using XMODEM.

OFF Normal operation.

Master Solid Amber The switch is functioning as the master switch of the stack.

Off The switch is functioning as a slave switch in the stack or is

not a part of a stack.

RPS (Redundant
Power Supply)

Solid Green The RPS is connected to the switch. To verify that the RPS is

operating correctly, refer to the instructions in the RPS
Quick Install Guide.

Power Solid Green The switch is receiving power, the voltage is within the

acceptable range, and the power supply is working.

16

AT-8316F and AT-8324 Installation Guide

Each port has two LEDs that reflect the operating status of the port.
On the AT-8316F switch, the port LEDs are located directly above or
next to each port. On the AT-8324 switch, the port LEDs are grouped
together on the right side of the switch. Table 1-3 describes the port
LEDs on the Ethernet switch.

Table 1-3 Switch Port LED Status

LED State Description
L/A (Link/Activity) Solid Green This indicates a 100 Mbps link.

Flashing Green This indicates 100 Mbps activity.
Solid Amber This indicates a 10 Mbps link (AT-8324 switch

only).

Flashing Amber This indicates 10 Mbps activity (AT-8324 switch

only).

D/C (Duplex/Collision) Solid Green The port is operating at full-duplex.

Solid Amber The port is operating at half-duplex.
Flashing Amber Collisions are occurring on the line.

17

Hardware Description

STATUS

RE

FAULT
MASTER
RPS
PWR

212223

24

RS-232

TERMINAL PORT

ACTIVITY
COL

RS232 Connector

The RS232, DB-9 female port on the front of the switch (shown in
Figure 1-6) is used with a VT100 terminal to manage the system. By
connecting a terminal to the connector (or by using a personal
computer with a terminal emulation program, such as the MS­Windows’ Hyper Terminal emulation program), you can access the
pre-installed Omega management program and configure the
switch.

18

10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH

A

B

1X 3X 5X 7X

2X 4X 6X 8X

10BASE-T / 100BASE-TX

9X 11X 13X 15X

10X 12X 14X 16X

17X 19X 21X 23X

18X 20X 22X 24X

PORT ACTIVITY

L/A

100M LINK / ACTIVITY 10M LINK / ACTIVITY

D/C

HALF DUP/

FULL DUP

1234567891011121314151617181920212223

L/A
D/C
L/A
D/C

COL

24

RS-232

TERMINAL PORT

STATUS

FAULT
MASTER
RPS
PWR

RESET

Figure 1-6 RS232 Port

This method for accessing the Omega program is referred to as “local
access” or “out-of-band” access. You can also access the program
over the web with a web browser or remotely via Telnet or an SNMP
management program.

In an IP environment, after you have initially installed the switch you
will be required to access the Omega program through the RS232
port in order to assign the switch its IP address and, if necessary, a
gateway address. Once these addresses have been assigned, you can
either continue to manage the switch through the RS232 port or
access the program via one of the other available methods.

Note

Only the RS232 port on the master switch in a stack can be used to
configure a stack locally. The RS232 ports on the slave switches are
inactive and cannot be used. (For an explanation of master and
slave switches, refer to , Chapter 3, Installing the Switch.)
Additionally, a straight-through cable is required in order to
connect a terminal to the RS232 port on the master switch.

Stacking Ports

IS-A IS-B

STACK ID

0

AT-8316F and AT-8324 Installation Guide

On the back of the switch are two stacking ports (Figure 1-7). The
ports are used to interconnect AT-8316F and AT-8324 switches to
form logical switches. A logical switch consists of two or more
individual switches that function as one unit. This feature allows you
to build a switch that is customized to the needs and requirements of
your network. It also makes it easier to manage them since, rather
than having to mange the switches individually, you can manage all
the switches as one unit.

Stacking Ports

Figure 1-7 Stacking Ports

Interconnecting two or more AT-8316F or AT-8324 switches creates
what is referred to as a stack. A stack can consist of either the same
type of Ethernet switches or different types of switches. For example,
a stack can consist of a combination of AT-8316F/MT and AT-8324
switches. The result would be one logical switch, where the
individual switches themselves were different in the number and
types of ports.

Each stacking port provides two gigabits of full-duplex bandwidth
between switches. A stack of two or three switches does not require
any additional hardware other than the switches and the
AT-CABLE-4 cables that comes with the units. Creating a stack of four
to eight switches requires the optional AT-Stack8 Stacking Matrix
Module.

19

Hardware Description

STACK ID

1

Stacking Module Expansion Slot

The stacking module expansion slot on the back panel of the switch
is for the optional AT-Stack8 Stacking Matrix Module. This module
allows you build a logical switch of up to eight switches.

Stack ID Switch

Next to the stacking ports on the back panel of the switch is the Stack
ID switch (shown in Figure 1-8). You use this switch when you build a
stack to assign each switch a unique identification number.

IS-A IS-B

STACK ID

0

Figure 1-8 Stac k ID Switch

Note

While the Stack ID switch has the range of settings of 0 to 9, only
settings 1 through 8 are valid settings. Settings of 0 and 9 are
invalid and should not be used. For information on setting this
switch, refe r t o Chapter 3, Installing the Switch .

20

Expansion Module Slots

10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH

1X 3X

2X 4X

A

B

The capabilities of the AT-8316F and AT-8324XL Ethernet switches
can be expanded by installing optional expansion modules in the
two expansion slots on the front of the switches (shown in Figure
1-9).

The modules offer you flexibility in building or expanding your
network. For example, you can use the modules to build a high­speed backbone network between different switches, to expand the
number of ports on a switch for additional nodes, or to provide a
high-speed connection to shared devices, such as servers or routers.

AT-8316F and AT-8324 Installation Guide

Expansion Slots

Figure 1-9 Expansion Slot s

Optional

Expansion

Modules

Table 1-4 lists the optional expansion modules for the AT-8316F and
AT-8324 Ethernet switches. The modules can be installed in any
combination in the switch. For example, you can install an AT-A15/LX
module in one expansion slot and an AT-A18 module in the second
expansion slot of the same switch.

Table 1-4 Optional Expansion Modules

Module

Number
of Ports

Type of Port

AT-A15/SX 1 1000Base-SX SC 550 meters

Type of
Connector

Maximum Distance

1

(1,804 feet)
AT-A15/LX 1 1000Base-LX SC 10 kilometers2 (6.2 miles)
AT-A16 2 100Base-FX VF-45 2 kilometers3 (6,600 feet)
AT-A17 2 100Base-FX SC 2 kilometers3 (6,600 feet)
AT-A18 4 10/100Base-TX RJ-45 100 meters (328 feet)
AT-A19 2 100Base-FX MT-RJ 2 kilometers

1. Assumes 50/125 micron multimode fiber optic cabling.

2. Assumes 9/125 micron single-mode fiber optic cabling.

3. Assumes 50/125 micron or 62.5/125 micron multimode fiber optic cabling and full-duplex operation.

3

(6,600 feet)

21

Hardware Description

Figure 1-10 illustrates the front panels of the expansion modules.

LINK

ACTIVITY

AT-A15

1000BASE-X

AT-A15 (SX or LX)

AT-A17

RXTX RXTX

100BASE-FX/SC

AT-A17

ACTIVITY

LINK

FULL

HALF

AT-A16

2X 3X 4X1X

LINK

ACTIVITY

FULL HALFFULL HALF

100M

LINK

ACTIVITY

10M

LINK

AT-A18

10BASE-T/100BASE-TX

FULL

DUPLEX

HALF

DUPLEX

AT-A18

ACTIVITY

LINK

AT-A19

ACTIVITY

LINK

FULL

HALF

100BASE-FX/MT

FULL

HALF

AT-A19

Figure 1-10 Optional Expansion Modules

22

R.P.S Input Connector

On the back panel of the Ethernet switch is a connector labelled
R.P.S. Input (shown in Figure 1-11). This connector is used to connect
the switch to a redundant power supply (RPS) unit. The RPS shares
the load of powering the switch with the standard power supply that
comes with the Ethernet switch. If one power supply fails, the
remaining unit provides all power to the switch, thus protecting the
switch from a system failure.

AT-8316F and AT-8324 Installation Guide

R.P.S Input Connector

Figure 1-11 R.P.S Input Connector

Allied Telesyn offers the AT-RPS8000 redundant power supply
system for the AT-8316F and AT-8324 switches. The RPS system
comes with one redundant power module pre-installed that can
support one Ethernet switch. The AT-RPS8000 unit has three
expansion slots for three additional redundant power modules, each
of which can support an additional switch. Contact your Allied
Telesyn representative for more information about the AT-RPS8000
redundant power supply unit.

23

Hardware Description

Reset Button

The Reset button on the front panel of the switch resets the switch. It
is primarily used for diagnostics or resetting the switch statistics
stored by the AT-S25 management software. You can also reset the
switch using the Omega management interface, as explained in the
AT-S25 Management Software User’s Guide. This guide is
available from the Allied Telesyn web site at www.alliedtelesyn.com/

techhome.htm.

Note

If it becomes necessary to reset a switch that is a part of a stack, you
must reset all of the switches in the stack. You cannot reset just one
switch in a stack. Additionally, you should reset the slave switches
first, then the master switch. For information on slave and master
switches, refer to Chapter 3, Installing the Switch.

24

AT-8316F and AT-8324 Installation Guide

AC Power Connector

The switch has a single AC power supply socket on the back panel,
which has autoswitch AC inputs. The input voltage range is from
100-120/200-240 VAC, 4/2A, 50/60 Hz. The power cord acts as an ON/
OFF switch.

AT-S25 Management Software and Omega Management Interface

The AT-S25 software is the management program for the switch, and
it comes pre-installed on the unit. Included with the AT-S25 software
is the Omega management interface. This menu oriented interface
makes it easy for you to manage the system. With Omega, you can
perform all of the tasks necessary to configuring and monitoring the
system, such as creating VLANs, assigning operational parameters to
the switch, such as an IP address and gateway address, and viewing
switch statistics, all through menu selections and easy-to-use
windows.

In a network environment where you have created a stack of
Ethernet switches, you will use the Omega management interface to
manage all of the switches in the stack as a unit, that is, as one logical
switch. You will not manage each switch in a stack separately.

There are several different methods for accessing the Omega
management interface on an Ethernet switch:

# RS-232 connector on the switch
# Web browser
# Telnet program
# SNMP network management program

The Omega interface functions the same and has the same
capabilities regardless of the method you choose to access it. The
program has security features that allow you to disable one or more
of the access methods to prevent unauthorized access to a switch.
The program also has a password security feature.

Note

For instructions on how to access and how to use the Omega
management interface, refer to the AT-S25 Management
Software User’s Manual. This guide is available from the Allied
Telesyn web site at www.alliedtelesyn.com/techhome.htm.

25

Hardware Description

Network Topology

Figure 1-12 is an example of a network consisting of AT-8316F and
AT-8324 Ethernet switches. Some of the features of the network
include the following:

# Though the Sales and Technical Support workgroups are

distributed between several sites, the 802.1Q VLAN
capabilities of the switches allow you to easily separate their
traffic, improving network performance and enhancing
network security as well.

# The stack of four switches at site 1 are interconnected with an

AT-Stack8 stacking module.

# Port trunking at site 1 provides 200 Mbps of full-duplex

operation to the network servers in the server farm.

# Expansion modules in the switches provide interconnections

between the various sites. For example, site 1 and site 2 each
have AT-A15/LX expansion modules to provide 1000Base-LX
performance up to a maximum distance of 10 kilometers (6.2
miles).

26

Site 1:
AT-8324 and
AT-8316F
stack

X
T

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S
A
B
0
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F

AT-8316F and AT-8324 Installation Guide

Site 2:
AT-8224XL switch

Y
T
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V
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A

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3
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Technical
Support
workgroup

Site 3:
AT-8324 stack

F

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S

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/

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S

A
B
0
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Site 4:
AT-8324 stack

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0
1

Production
workgroup

Sales
workgroup

S
U
T
A
T

S
2
3
2

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Site 5:
AT-8224XL switch

S
U
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3
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F

Technical
Support
workgroup

Engineering
workgroup

Legend
10Base-T/100Base-TX link

100Base-FX link
1000Base-SX link
1000Base-LX link
Port trunk

Sales
workgroup

Figure 1-12 Topology Example

27

Hardware Description

Where to Go Next

Proceed to Chapter 2 for information on how to plan the installation.

28