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AT-8326GB
User Manual
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Allied Telesis AT-8326GB User Manual

K
Fast Ethernet
®
Switch
AT-8326GB
Installation Guide
PN 613-50282-00 Rev A
All rights reserved. No part of this publication may be reproduced without prior written permission from 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 information provided herein is subject to change without notice. In no event shall 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 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 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.
Canadian Department of Communications
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 FCC Class A, EN55022 Class A, CISPR22 Class A (VCCI), AS/NZS3548 (C-
Warning: In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
Immunity EN55024
Electrical Safety UL 1950 (UL/cUL)), EN60950
Laser EN60825
Important: Appendix C contains translated safety statements for installing this equipment. When you see the C for the translated safety statement in your language.
Wichtig: Anhang C enthält übersetzte Sicherheitshinweise für die Installation dieses Geräts. Wenn Sie Anhang C den übersetzten Sicherheitshinweis in Ihrer Sprache nach.
Vigtigt: Tillæg C indeholder oversatte sikkerhedsadvarsler, der vedrører installation af dette udstyr. Når De ser symbolet De slå op i tillæg C og finde de oversatte sikkerhedsadvarsler i Deres eget sprog.
Belangrijk: Appendix C bevat vertaalde veiligheidsopmerkingen voor het installeren van deze apparatuur. Wanneer u de raadpleeg Appendix C voor vertaalde veiligheidsinstructies in uw taal.
Important : L'annexe C contient les instructions de sécurité relatives à l'installation de cet équipement. Lorsque vous voyez le symbole
Tärkeää: Liite C sisältää tämän laitteen asentamiseen liittyvät käännetyt turvaohjeet. Kun näet turvaohjetta liitteestä C.
Importante: l’Appendice C contiene avvisi di sicurezza tradotti per l’installazione di questa apparecchiatura. Il simbolo di consultare l’Appendice C per l’avviso di sicurezza nella propria lingua.
Viktig: Tillegg C inneholder oversatt sikkerhetsinformasjon for installering av dette utstyret. Når du ser for å finne den oversatte sikkerhetsinformasjonen på ønsket språk.
Importante: O Anexo C contém advertências de segurança traduzidas para instalar este equipamento. Quando vir o símbolo leia a advertência de segurança traduzida no seu idioma no Anexo C.
Importante: El Apéndice C contiene mensajes de seguridad traducidos para la instalación de este equipo. Cuando vea el símbolo
, reportez-vous à l'annexe C pour consulter la traduction de ces instructions dans votre langue.
2
TICK), EN61000-3-2, EN61000-3-3
3
4
5
1
, go to Appendix
sehen, schlagen Sie in
, skal
ziet,
-symbolin, katso käännettyä
, indica
, åpner du til Tillegg C
,
, vaya al Apéndice C para ver el mensaje de seguridad traducido a su idioma.
Obs! Bilaga C innehåller översatta säkerhetsmeddelanden avseende installationen av denna utrustning. När du ser till Bilaga C för att läsa det översatta säkerhetsmeddelandet på ditt språk.
, skall du gå
iii

Table of Contents

Preface ......................................................................................................................................................................................................................6
How This Guide is Organized ............................................................................................................................................................................. 6
Document Conventions ...................................................................................................................................................................................... 7
Where to Find Web-based Guides ...................................................................................................................................................................8
Contacting Allied Telesyn ...................................................................................................................................................................................9
Telephone Support .......................................................................................................................................................................................9
For Sales or Corporate Information ........................................................................................................................................................ 9
Management Software Updates ....................................................................................................................................................................10
Chapter 1
Product Description .........................................................................................................................................................................................11
Summary of Features ..........................................................................................................................................................................................11
Location of Components ...................................................................................................................................................................................12
Hardware Features ..............................................................................................................................................................................................13
Twisted Pair Ports ........................................................................................................................................................................................ 13
Gigabit Interface Converter (GBIC) Slots............................................................................................................................................. 17
Stacking Ports ............................................................................................................................................................................................... 18
System LEDs .................................................................................................................................................................................................. 19
Stack ID LEDs................................................................................................................................................................................................. 20
10/100 Mbps Port LEDs ............................................................................................................................................................................. 21
10/100/1000 Mbps Port LEDs.................................................................................................................................................................. 22
Gigabit Connector LEDs ............................................................................................................................................................................ 23
RS-232 Terminal Port.................................................................................................................................................................................. 24
AC Power Connector.................................................................................................................................................................................. 25
Software Features ................................................................................................................................................................................................26
AT-S41 Management Software .............................................................................................................................................................. 26
Spanning Tree Protocol (STP) ................................................................................................................................................................. 29
Tagged and Port-based VLANs............................................................................................................................................................... 30
Quality of Service (QoS)............................................................................................................................................................................. 30
IGMP Snooping ............................................................................................................................................................................................ 31
Dynamic Host Configuration Protocol (DHCP) ................................................................................................................................. 32
Port Monitoring............................................................................................................................................................................................ 32
Port Trunking ................................................................................................................................................................................................ 32
Port Security .................................................................................................................................................................................................. 35
A Few Basics to Ethernet Switching ..............................................................................................................................................................36
MAC Address Table..................................................................................................................................................................................... 36
Duplex Mode................................................................................................................................................................................................. 37
Store and Forward....................................................................................................................................................................................... 37
4
Backpressure and Flow Control ............................................................................................................................................................. 37
Network Topologies ............................................................................................................................................................................................39
Power Workgroup Topology................................................................................................................................................................... 39
Collapsed Backbone - Hub Topology................................................................................................................................................... 40
Switch Stacking Topology........................................................................................................................................................................ 41
Chapter 2
Installation ............................................................................................................................................................................................................42
Installation Safety Precautions ........................................................................................................................................................................43
Selecting a Site for the Switch .........................................................................................................................................................................44
Required Cables ....................................................................................................................................................................................................45
Unpacking the Switch ........................................................................................................................................................................................46
Installing the Switch on a Desktop ................................................................................................................................................................47
Installing the Switch in a Rack .........................................................................................................................................................................48
Installing an Optional GBIC Module ..............................................................................................................................................................50
Creating a Switch Stack .....................................................................................................................................................................................52
Cabling the Switch ...............................................................................................................................................................................................55
Powering On the Switch ....................................................................................................................................................................................58
Starting a Local Management Session .........................................................................................................................................................59
Warranty Registration .........................................................................................................................................................................................62
Chapter 3
Troubleshooting ................................................................................................................................................................................................63
Appendix A
Technical Specifications .................................................................................................................................................................................67
Physical Specifications .......................................................................................................................................................................................67
Environmental Specifications ..........................................................................................................................................................................67
Power Specifications ...........................................................................................................................................................................................67
Safety and Electromagnetic Emissions Certifications .............................................................................................................................68
Standards ................................................................................................................................................................................................................68
SNMP Support .......................................................................................................................................................................................................68
Appendix B
Default Switch Settings ..................................................................................................................................................................................69
Appendix C
Translated Electrical Safety and Emission Information ..................................................................................................................71
5

Preface

This guide contains instructions on how to install the stackable AT-8326GB Fast Ethernet switch.

How This Guide is Organized

This manual contains the following chapters and appendices:
Chapter 1, Hardware Description, describes the features and components of the switch.
Chapter 2, Installation, contains the installation instructions.
Chapter 3, Troubleshooting, provides information on how to resolve
common problems that might occur with the switch.
Appendix A, Technical Specifications, contains the switch’s technical specifications.
Appendix B, Switch Default Settings, lists the factory default settings.
Appendix C, Translated Electrical Safety and Emission Information,
contains translations of the warnings and cautions in the manual.
6

Document Conventions

This document uses the following conventions to highlight important information.
Note
Notes provide additional information.
Warning
Warnings inform you that performing or omitting a specific action may result in bodily injury.
Caution
Cautions inform you that performing or omitting a specific action may result in equipment damage or loss of data.
AT-8326GB Installation Guide
7

Where to Find Web-based Guides

The Allied Telesyn web site at www.alliedtelesyn.com contains the most recent documentation for all Allied Telesyn International products. All documents are available as PDF files. You can either view the documents online or download them onto a local workstation or server.
Once you have installed the switch, refer to following manual for instructions on how to manage and configure the unit. The manual is available from the Allied Telesyn web site:
❑ AT-S41 Management Software User’s Guide
PN 613-50283-00
AT-8326GB Installation Guide
8

Contacting Allied Telesyn

AT-8326GB Installation Guide
Telephone
Support
To contact Technical Support by telephone, find your country or region in the table below.
United States and Canada
Tel: 1 800 428 4835 (option 4)
Europe, Africa, and the Middle East
Tel: 00 800 287 877 67* or +31 20 711 4333 (Finland only: Tel: 990 287 877 67)
Asia and Southeast Asia
Tel: (++65) 381 5612
Australia
Tel: 1 800 000 880
New Zealand
Tel: 0800 45 5782
(* Valid in Austria, Belgium, France, Germany, Ireland, Italy, Luxembourg, The Netherlands, Norway, Sweden, Switzerland and the United Kingdom. For other European countries not listed here, ring +31 20 711 4333.)
You can also contact Technical Support online at:
http://kb.alliedtelesyn.com
For Sales or
Corporate
Information
Allied Telesyn, Inc.
19800 North Creek Parkway, Suite 200 Bothell, WA 98011 Tel: (425) 487-8880 Fax: (425) 489-9191
9

Management Software Updates

Allied Telesyn periodically updates the management software programs for our managed products. To obtain a copy of an updated management program, you can download the software either from our web site or our FTP server at ftp.alliedtelesyn.com ‘anonymous’ for the user name when you log in and your e-mail address for the password.
AT-8326GB Installation Guide
. To use the FTP server, enter
10

Chapter 1

Product Description

The AT-8326GB is a stackable Layer 2 Fast Ethernet switch. It offers a wide range of features and capabilities, all designed to simplify the task of creating and maintaining a Fast Ethernet network.

Summary of Features

G 24 10/100Base-TX ports with RJ-45 connectors
G Two 10/100/1000Base-T ports with RJ-45 connectors
G Auto-MDI/MDI-X on all twisted pair ports
G Auto-Negotiation for speed and duplex mode (IEEE 803.3u-
compliant)
G Two slots for Gigabit Interface Converter modules
G Two stacking ports
G Port trunking and port monitoring
G Port security
G Dynamic Host Configuration Protocol
G Internet Group Management Protocol snooping
G AT-S41 management software
G Port-based and tagged VLANs (IEEE 802.1Q-compliant)
G Spanning tree protocol (IEEE 802.1d-compliant)
G Quality of Service (IEEE 802.1p-compliant)
11

Location of Components

Figure 1 illustrates the front panel of the AT-8326GB Fast Ethernet Switch.
GIGA
LNK/ACT
STACK ID
FAULT
PWR
FDX/COL
GIGA
LNK/ACT
FDX/COL
AT-8326GB Installation Guide
Slots
GBIC
RS-232
System and Port LEDs
Stacking
10/100Base-TX Ports
Figure 1 AT-8326GB Front Panel
Figure 2 illustrates the back panel.
STACK IN STACK OUT
Ports
Figure 2 Back Panel
10/100/1000Base-T Ports
AC Power Connector
RS232
Terminal Port
100-240 VAC
12

Hardware Features

The following sections describe these hardware features of the AT­8326GB Fast Ethernet switch:
AT-8326GB Installation Guide
G 10/100Base-TX and 10/100/1000Base-T Ports
G Gigabit Interface Converter (GBIC) Slots
G Stacking Ports
G System LEDs
G Stack ID LEDs
G Port LEDs
G Gigabit Connector LEDs
G RS-232 Terminal Port
G AC Power Connector
Twisted Pair
Ports
10/100/1000Base-T Ports
10/100Base-TX Ports

Figure 3 Twisted Pair Ports

The AT-8326GB Fast Ethernet switch features 24 10/100 Mbps twisted pair ports and two 10/100/1000 Mbps twisted pair ports. The features of the twisted pair ports are described below.
Type of Connector
All of the twisted pair ports feature RJ-45 connectors. (For the port pinout details, refer to RJ-45 Port Pinouts on page 15.)
Speed
The 10/100Base-TX ports are capable of 10 megabits per second (Mbps) or 100 Mbps speeds. The 10/100/1000Base-TX ports are capable of 10 Mbps, 100 Mbps, or 1000 Mbps speeds. You can set the port speed manually or, since the ports are IEEE 802.3u Auto-Negotiation compliant, you can allow the switch to set each port’s speed automatically. With
13
AT-8326GB Installation Guide
Auto-Negotiation, the switch automatically matches the highest possible common speed between each switch port and each end node. For example, if an end node is capable of only 10 Mbps, the switch sets the port connected to the end node to 10 Mbps.
Note
Auto-Negotiation is activated as the default on all of the ports on the switch. To deactivate Auto-Negotiation and set the speeds manually, refer to the AT-S41 Management Software User’s Guide.
Maximum Distance
Each twisted pair port has a maximum operating distance of 100 m (328 ft).
Type of Cabling
For 10 Mbps operation, Category 3 or better 100 ohm shielded or unshielded twisted pair cabling is required. For 100 or 1000 Mbps operation, Category 5 and Enhanced Category 5 (5E) 100 ohm shielded or unshielded twisted pair cabling is required.
Auto-MDI
All of the twisted pair ports on the switch are auto-MDI and IEEE
802.3ab-compatible. They automatically configure themselves as either MDI or MDI-X. This feature allows you to use either straight-through or cross-over twisted pair cables to connect devices to the ports.
Duplex Mode
Each twisted pair port on the switch can operate in either half- or full­duplex mode. The twisted pair ports are IEEE 802.3u-compliant and will Auto-Negotiate the duplex mode setting. If the end node connected to a twisted pair port on the switch is capable of full-duplex operation, the switch sets the port to full-duplex. If the end node is capable of only half­duplex, the port is set to half-duplex.
If desired, Auto-Negotiation on one or all of the twisted pair ports can be disabled so that you can set the duplex mode manually through the switch’s management software.
14
AT-8326GB Installation Guide
RJ-45 Port Pinouts
Figure 4 illustrates the pin layout to an RJ-45 connector and port.
8
1
8
1
Figure 4 RJ-45 Connector and Port Pin Layout
Table 1 lists the RJ-45 pin signals when a twisted pair port is operating in the MDI configuration.
Table 1 MDI Pin Signals (10/100 Mbps)
Pin Signal
1TX+
2TX-
3RX+
6RX-
Table 2 lists the RJ-45 port pin signals when a twisted pair port is operating in the MDI-X configuration.
Table 2 MDI-X Pin Signals (10/100 Mbps)
Pin Signal
1RX+
2RX-
3TX+
6TX-
15
AT-8326GB Installation Guide
Table 3 lists the RJ-45 connector pins and their signals when a 10/100/ 1000 Mbps twisted pair port is operating at 1000 Mbps.
Table 3 1000 Mbps Pin Signals
Pin Pair Signal
1 1 TX and RX+
2 1 TX and RX-
3 2 TX and RX+
4 2 TX and RX+
5 3 TX and RX-
6 3 TX and RX-
7 4 TX and RX+
8 4 TX and RX-
16
Gigabit
Interface
Converter
AT-8326GB Installation Guide
(GBIC) Slots
RS-232
Figure 5 GBIC Slots
The AT-8326GB Fast Ethernet switch has two GBIC slots on the front panel, which correspond to Ports 25 and 26. Each slot can accommodate one optional GBIC module.
A GBIC module is a gigabit (1000Base) transceiver. GBIC modules can be used to extend the distance of your network, build a high-speed backbone network, or connect additional nodes to the network, such as high-speed servers. Figure 6 shows an example of a fiber optic GBIC module.
Figure 6 Example of a GBIC Module
Note
Ports 25 and 26 can each support only one medium type (i.e., twisted pair or GBIC) at a time. For example, if you install a GBIC for Port 25, you cannot use the corresponding twisted pair port.
In order to use Port 25 or 26 with a GBIC module, you must change the port setting in the management software to GBIC instead of twisted pair. For instructions, refer to the AT-S41 Management Software User’s Guide.
The AT-8326GB Gigabit Ethernet Switch supports the AT-G8 series GBIC modules: SX, LX, LX25, LX40, LX75.
17

Stacking Ports

AT-8326GB Installation Guide
STACK IN STACK OUT
Stacking Ports
Figure 7 Stacking Ports
There are two stacking ports on the back of the switch (Figure 7). The ports are used to connect AT-8326GB switches to form a logical switch. A logical switch consists of two or more individual switches that function as one unit. This feature offers the following benefits:
G Stacking allows you to build a switch that is customized to the
needs and requirements of your network.
G Stacking simplifies network management. Rather than having to
mange the switches individually, you can manage all of the switches as one unit.
G Stacking allows you to manage multiple switches from one
management session. All of the switches in a stack can be managed from one management session through the master switch of the switch stack.
G Stacking switches reduces the number of IP addresses you need
to assign to the switches you want to manage, since you can use one IP address for all of the switches in a switch stack.
Up to six AT-8326GB switches can be stacked together in a daisy-chain stacking configuration. Star and redundant path configurations will not work.
A stack does not require any additional hardware other than the switches and the LVDS stacking cable that comes with the units.
18

System LEDs

AT-8326GB
24 + 2G Managed Switch
System LEDs
The system LEDs on the front panel display general status information about the entire switch. The system LEDs are defined in Table 4.
Table 4 System LEDs
LED State Description
AT-8326GB Installation Guide
STACK ID
FAULT
PWR
Figure 8 System LEDs
PWR Green System power is ON.
OFF System power is OFF.
FAULT Green The switch or management software has malfunctioned.
(Refer to Chapter 3, Troubleshooting on page 60 for instructions on how to determine and repair the problem.)
Flashing Green
The switch is loading its operating software, running diagnostic tests, writing messages to FLASH, or downloading files using XMODEM.
19

Stack ID LEDs

AT-8326GB Installation Guide
AT-8326GB
24 + 2G Managed Switch
FAULT
PWR
STACK ID
GIGA
LNK/ACT
FDX/COL
GIGA
LNK/ACT
FDX/COL
Stack ID LEDs
Figure 9 Stack ID LEDs
The stack ID LEDs indicate the switch’s position in a switch stack. Since you can stack up to six AT-8326GB switches, there are six stack ID LEDs. For instructions on how to create a switch stack, refer to Creating a Switch Stack on page 52.
20
10/100 Mbps
Port LEDs
AT-8326GB Installation Guide
AT-8326GB
24 + 2G Managed Switch
FAULT
PWR
STACK ID
GIGA
LNK/ACT
FDX/COL
GIGA
LNK/ACT
FDX/COL
Port LEDs
Figure 10 Port LEDs
The 10/100 Mbps port LEDs on the front panel display port status information for Ports 1-24. Each 10/100 Mbps port has two LEDs.
Each port has a LNK/ACT LED which displays the speed of an established link and whether or not there is any activity on the link.
Each port also has an FDX/COL LED. This LED displays the duplex mode of the port and whether or not there are any collisions occurring on the port.
Table 5 describes the 10/100Base-TX port LEDs.

Table 5 10/100 Mbps Port LEDs

LED State Description
LNK/ACT Steady Green
A 100 Mbps link with no activity.
Flashing Green A 100 Mbps link with activity.
Steady Yellow A 10 Mbps link with no activity.
Flashing Yellow A 10 Mbps link with activity.
OFF No link has been established.
FDX/COL Green The port is in full-duplex mode.
Yellow The port is in half-duplex mode and no data colli-
sions are occurring on the port.
Flashing Yellow The port is in half-duplex mode with collisions.
21
AT-8326GB Installation Guide
10/100/1000
Mbps Port LEDs
The 10/100/1000 Mbps port LEDs on the front panel display port status information for Ports 25 and 26. Each 10/100/1000 Mbps port has three LEDs.
Like the 10/100 Mbps ports, the 10/100/1000Mbps ports have the same LNK/ACT and FDX/COL LEDs that display status information when the port is operating at 10/100 Mbps speeds. The 10/100/1000 Mbps ports have an additional LED called the GIGA LED that displays the LNK/ACT status information when the port is operating at 1000 Mbps speeds.
Table 6 describes the 10/100/1000 Mbps port LEDs.

Table 6 10/100/1000 Mbps Port LEDs

LED State Description
GIGA Steady Green
Flashing Green
OFF
LNK/ACT Steady Green
A 1000 Mbps link with no activity.
A 1000 Mbps link with activity.
No 1000 Mbps link has been established.
A 100 Mbps link with no activity.
Flashing Green A 100 Mbps link with activity.
Steady Yellow
Flashing Yellow A 10 Mbps link with activity.
OFF
FDX/COL Green
Yellow
Flashing Yellow The port is in half-duplex mode with collisions.
A 10 Mbps link with no activity.
No 10/100 Mbps link has been established.
The port is in full-duplex mode.
The port is in half-duplex mode and no data colli­sions are occurring on the port.
22
Gigabit
Connector LEDs
AT-8326GB Installation Guide
RS-232
Connector LEDs

Figure 11 Gigabit Connector LEDs

Ports 25 and 26 each have two connector LEDs on the front panel that indicate which connector type is being used for each port: the RJ-45 or the GBIC. The connector LEDs for each port are located to the left of the RJ-45 connectors and to the right of the GBIC slots.
23
RS-232
Terminal Port
AT-8326GB Installation Guide
RS-232
Terminal Port

Figure 12 RS-232 Terminal Port

The RS-232 Terminal Port is used to establish a local (out-of-band) management session with the switch. Using the port, you can access the switch’s management software and configure the switch’s operating parameters.
You establish a local management session by connecting either a VT100 terminal or a personal computer with a terminal emulation program to the port.
Note
You are not required to manage an AT-8326GB Fast Ethernet switch. The default switch settings may be sufficient for your network, in which case you can use the unit as an unmanaged switch. For the switch’s default settings, refer to Default Switch Settings on page 69.
The RS-232 Terminal Port has a DB-9 female connector and uses a null modem management cable.
The default settings for the RS-232 Terminal Port are:
G Emulation mode: VT100
G Data rate: 9600
G Data bits: 8
G Parity: None
G Stop bits: 1
G Flow control: None
G Key mode: Terminal
24
AC Power
Connector
AT-8326GB Installation Guide
100-240 VAC

Figure 13 AC Power Connector

The switch has a single AC power supply socket on the back panel, which has autoswitch AC inputs. Refer to the Technical Specifications on page 67 for the input voltage range. To power ON or OFF the switch, you connect or disconnect the power cord.
25
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