Allied Telesis AT-SBx908 User manual

613-002595 Rev. B
AT-SBx908 GEN2 Switch
Advanced Layer 3+ Modular Switch
AlliedWare Plus™ v5.4.8-0
AT-SBx908 GEN2 Chassis
AT-XEM2-12XT Ethernet Line Card
AT-XEM2-12XS Ethernet Line Card
AT-XEM2-4QS Ethernet Line Card
AT-XEM2-1CQ Ethernet Line Card
AT-FAN08 Fan Module
AT-SBxPWRSYS2 AC Power Supply
AT-SBxPWRSYS1-80 DC Power Supply
Virtual Chassis Stacking Installation
Guide

Copyright 2018 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
Allied Telesis, VCStack, and the Allied Telesis logo are trademarks of Allied Telesis, Incorporated. All other product names, company
names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners.
Allied Telesis, 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 Telesis, 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 Telesis, Inc. has been advised of, known, or should have known, the
possibility of such damages.

3
Electrical Safety and Emissions Standards
This product meets the following standards.
RFI Emissions: FCC Class A, CISPR 22 Class A, EN55032 Class A, VCCI Class A, ICES-003
Class A, RCM
EMC (Immunity): EN55024, EN61000-3-2, EN61000-3-3
Electrical Safety: UL 60950-1 (CULUS), EN60825-1 (TUV),
RoHS: RoHS6
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 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 of by the manufacturer or the FCC, can void your right to operate
this equipment.
Industry Canada
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Warning: In a domestic environment this product may cause radio interference in which case
the user may be required to take adequate measures.
Laser Safety EN60825

4
Translated Safety Statements
Important: Safety statements that have the symbol are translated into multiple languages in the
Translated Safety Statements document at www.alliedtelesis.com/support.

5
Preface ...............................................................................................................................................................................15
Document Conventions .......................................................................................................................................................16
Contacting Allied Telesis .....................................................................................................................................................17
Chapter 1: Overview ........................................................................................................................................................ 19
Overview..............................................................................................................................................................................20
AT-SBx908 GEN2 Chassis ..........................................................................................................................................20
Ethernet Line Cards .....................................................................................................................................................20
Management Software and Interfaces .........................................................................................................................20
Management Methods..................................................................................................................................................21
Management Panel ......................................................................................................................................................21
Power Supplies ............................................................................................................................................................21
AT-SBx908 GEN2 Chassis..................................................................................................................................................22
Ethernet Line Cards.............................................................................................................................................................23
AT-XEM2-12XT Line Card...................................................................................................................................................24
AT-XEM2-12XS Line Card...................................................................................................................................................26
AT-XEM2-4QS Line Card....................................................................................................................................................27
AT-XEM2-1CQ Line Card....................................................................................................................................................28
Management Panel .............................................................................................................................................................29
USB Port ......................................................................................................................................................................29
NET MGMT Ethernet Management Port......................................................................................................................30
Console (RS-232) Port.................................................................................................................................................31
Switch ID LED ..............................................................................................................................................................31
eco-friendly Button .......................................................................................................................................................32
Reset Button.................................................................................................................................................................32
Power Supplies....................................................................................................................................................................34
AT-FAN08 Units ..................................................................................................................................................................36
Specifying Ports in the Command Line Interface.................................................................................................................37
Software and Hardware Releases.......................................................................................................................................39
Chapter 2: Virtual Chassis Stacking .............................................................................................................................. 41
Overview..............................................................................................................................................................................42
Stacking Guidelines.............................................................................................................................................................43
Stack Trunk .........................................................................................................................................................................44
Master and Member Switches.............................................................................................................................................58
Selection of the Master Switch.....................................................................................................................................58
Switch ID Numbers..............................................................................................................................................................59
Optional Feature Licenses...................................................................................................................................................60
Planning the Stack...............................................................................................................................................................61
Stacking Worksheet.............................................................................................................................................................62
Chapter 3: Beginning the Installation ............................................................................................................................ 65
Hardware Installation Overview...........................................................................................................................................66
Reviewing Safety Precautions.............................................................................................................................................68
Choosing a Site for the Chassis ..........................................................................................................................................73
Unpacking the Chassis........................................................................................................................................................74
Unpacking AT-SBxPWRSYS2 AC Power Supplies.............................................................................................................79
Unpacking AT-SBxPWRSYS1-80 DC Power Supplies .......................................................................................................80
Chapter 4: Installing the Chassis ................................................................................................................................... 81
Tools and Material...............................................................................................................................................................82
Contents

Contents
6
Adjusting the Equipment Rack Brackets............................................................................................................................. 83
Installing the Chassis in an Equipment Rack...................................................................................................................... 87
Installing the Chassis Grounding Wire................................................................................................................................ 88
Installing AT-SBxPWRSYS2 AC Power Supplies............................................................................................................... 91
Installing AT-SBxPWRSYS1-80 DC Power Supplies ......................................................................................................... 95
Installing Ethernet Line Cards............................................................................................................................................. 99
Installing Blank Line Card Slot Covers.............................................................................................................................. 103
Installing the Blank Power Supply Slot Cover................................................................................................................... 105
Installing the Power Cord Retaining Clips......................................................................................................................... 107
Verifying the Installation.................................................................................................................................................... 108
Chapter 5: Wiring the AT-SBxPWRSYS1-80 DC Power Supply .................................................................................109
Introduction....................................................................................................................................................................... 110
Choosing a Method for Attaching the Grounding Wire ..................................................................................................... 112
Connecting the Grounding Wire with the Grounding Terminal ......................................................................................... 113
Connecting the Grounding Wire with Bare Wire............................................................................................................... 118
Introduction to Attaching the Power Wires........................................................................................................................ 121
Connecting the DC Power Wires with the Straight Terminals........................................................................................... 122
Connecting the DC Power Wires with the Right Angle Terminals .................................................................................... 129
Connecting Bare DC Power Wires.................................................................................................................................... 135
Chapter 6: Configuring Switches for Stacking ...........................................................................................................139
Introduction....................................................................................................................................................................... 140
Command Summary......................................................................................................................................................... 141
STACKPORT............................................................................................................................................................. 141
STACK ENABLE ....................................................................................................................................................... 141
STACK PRIORITY..................................................................................................................................................... 141
STACK RENUMBER................................................................................................................................................. 142
SWITCH PROVISION................................................................................................................................................ 142
Powering On AT-SBxPWRSYS2 AC Power Supplies...................................................................................................... 144
Starting a Local Management Session............................................................................................................................. 147
Configuring the Master Switch.......................................................................................................................................... 150
General Steps for the Master Switch......................................................................................................................... 150
Configuring the Master Switch................................................................................................................................... 151
Verifying the Master Switch....................................................................................................................................... 154
What to Do Next........................................................................................................................................................ 155
Configuring Member Switches.......................................................................................................................................... 156
General Steps for Member Switches......................................................................................................................... 156
Configuring a Member Switch - Part I........................................................................................................................ 157
Configuring a Member Switch - Part II....................................................................................................................... 159
Verifying a Member Switch........................................................................................................................................ 161
What to Do Next........................................................................................................................................................ 162
Powering on the Stack...................................................................................................................................................... 164
Verifying the Stack............................................................................................................................................................ 165
Chapter 7: Cabling AT-XEM2 Line Card Ports ............................................................................................................167
Cabling 1Gbps and 10Gbps Ports on AT-XEM2-12XT Line Cards .................................................................................. 168
Guidelines to Handling Twisted Pair or Fiber Optic Transceivers..................................................................................... 169
Installing and Cabling Fiber Optic Transceivers ............................................................................................................... 170
Installing Direct Connect Cables....................................................................................................................................... 173
Chapter 8: Replacing Modules .....................................................................................................................................177
Replacing AT-SBxPWRSYS2 AC Power Supplies........................................................................................................... 178
Replacing AT-SBxPWRSYS1-80 DC Power Supplies...................................................................................................... 181
Replacing AT-XEM2 Line Cards....................................................................................................................................... 192
Replacing AT-FAN08 Modules ......................................................................................................................................... 199
Removing AT-FAN08 Modules.................................................................................................................................. 199
Installing AT-FAN08 Modules.................................................................................................................................... 200
Chapter 9: Troubleshooting ..........................................................................................................................................203
Appendix A: Technical Specifications .........................................................................................................................209
Physical Specifications ..................................................................................................................................................... 210

AT-SBx908 GEN2 Installation Guide for Virtual Chassis Stackiing
7
Environmental Specifications.............................................................................................................................................212
Power Specifications .........................................................................................................................................................213
Certifications......................................................................................................................................................................215
Port Pinouts.......................................................................................................................................................................216

Contents
8

9
Figure 1: Front Panel of the AT-SBx908 GEN2 Chassis......................................................................................................22
Figure 2: Rear Panel of the AT-SBx908 GEN2 Chassis.......................................................................................................22
Figure 3: AT-SBx908 GEN2 Ethernet Line Cards ................................................................................................................23
Figure 4: Management Panel ...............................................................................................................................................29
Figure 5: Switch ID LED.......................................................................................................................................................32
Figure 6: AT-SBxPWRSYS2 and AT-SBxPWRSYS1-80 Power Supplies ...........................................................................34
Figure 7: AT-FAN08 Module.................................................................................................................................................36
Figure 8: PORT Parameter in the Command Line Interface.................................................................................................37
Figure 9: Example Trunks for Stacks of Two, Three, or Four Switches...............................................................................45
Figure 10: Stack of Three Switches with a Linear Trunk......................................................................................................46
Figure 11: Example of a Trunk with Multiple Links Between Switches.................................................................................47
Figure 12: Example of a Stack Trunk of Ports on Multiple Line Cards.................................................................................48
Figure 13: Invalid Trunk with Too Many Stacking Ports .......................................................................................................49
Figure 14: Stack with Three Chassis....................................................................................................................................50
Figure 15: Invalid Trunk Because Switches Have Different Numbers of Trunk Links ..........................................................51
Figure 16: Invalid Trunk with Different Ethernet Line Card Models......................................................................................52
Figure 17: Invalid Trunk Using Both Direct Connect and Fiber Optic Cables on AT-XEM2-12XT Line Cards.....................53
Figure 18: Invalid Trunk Using Both Direct Connect and Fiber Optic Cables on AT-XEM2-4QS Line Cards ......................54
Figure 19: Example of a Stack Trunk with AT-XEM2-1CQ Line Cards ................................................................................55
Figure 20: Invalid Trunk Because a Chassis is Connected to Three Other Chassis............................................................56
Figure 21: Invalid Trunk Because of Intermediary Network Devices....................................................................................57
Figure 22: NEMA 5-20P Plug and Receptacle .....................................................................................................................73
Figure 23: AT-SBx908 Gen2 Switch Shipping Box...............................................................................................................74
Figure 24: Lifting the Switch from the Shipping Box.............................................................................................................75
Figure 25: Removing the Switch from the Protective Shipping Bag.....................................................................................75
Figure 26: Pre-installed Items on the Front and Side Panels...............................................................................................76
Figure 27: Pre-installed Items on the Rear Panel.................................................................................................................77
Figure 28: Accessory Kit.......................................................................................................................................................78
Figure 29: Items in the Shipping Box for the AT-SBxPWRSYS2 AC Power Supply ............................................................79
Figure 30: Items in the Shipping Box for the AT-SBxPWRSYS1-80 DC Power Supply.......................................................80
Figure 31: Chassis Orientations in the Equipment Rack......................................................................................................83
Figure 32: Chassis Orientations in the Equipment Rack (Continued) ..................................................................................84
Figure 33: Chassis Orientations in the Equipment Rack (Continued) ..................................................................................85
Figure 34: Example of Adjusting the Equipment Rack Brackets ..........................................................................................86
Figure 35: Securing the Chassis to the Equipment Rack.....................................................................................................87
Figure 36: Stripping the Grounding Wire..............................................................................................................................88
Figure 37: Removing the Grounding Lug from the Chassis..................................................................................................89
Figure 38: Attaching the Grounding Wire to the Grounding Lug...........................................................................................89
Figure 39: Installing the Grounding Lug and Wire................................................................................................................90
Figure 40: Removing the Blank Power Supply Panel from Power Supply Slot B.................................................................92
Figure 41: Lifting the Locking Handle on the AT-SBxPWRSYS2 Power Supply..................................................................92
Figure 42: Sliding the AT-SBxPWRSYS2 AC Power Supply into the Chassis.....................................................................93
Figure 43: Lowering the Locking Handle on the AT-SBxPWRSYS2 AC Power Supply.......................................................93
Figure 44: On/Off Switch on the AT-SBxPWRSYS1-80 DC Power Supply..........................................................................96
Figure 45: Loosening the Handle locking Screw on the AT-SBxPWRSYS1-80 DC Power Supply......................................96
Figure 46: Lifting the Locking Handle on the AT-SBxPWRSYS1-80 DC Power Supply.......................................................97
Figure 47: Inserting the AT-SBxPWRSYS1-80 DC Power Supply.......................................................................................97
Figure 48: Lowering the Locking Handle on the AT-SBxPWRSYS1-80 DC Power Supply..................................................98
Figure 49: Removing a Blank Line Card Cover....................................................................................................................99
Figures

Figures
10
Figure 50: Removing the Ethernet Line Card from the Anti-static Bag...............................................................................100
Figure 51: Sliding the Ethernet Line Card into the Slot.......................................................................................................101
Figure 52: Seating an Ethernet Line Card in the Chassis...................................................................................................102
Figure 53: Tightening the Two Captive Screws on the Ethernet Line Card........................................................................102
Figure 54: Installing a Blank Slot Cover..............................................................................................................................103
Figure 55: Tightening the Captive Screws on a Blank Slot Cover......................................................................................104
Figure 56: Lifting the Locking Handle on the Blank Power Supply Slot Cover ...................................................................105
Figure 57: Aligning the Blank Power Supply Cover in the Slot...........................................................................................106
Figure 58: Lowering the Locking Handle on the Blank Power Supply Slot Cover ..............................................................106
Figure 59: Installing the Power Cord Retaining Clips .........................................................................................................107
Figure 60: Components on the AT-SBxPWRSYS1-80 DC Power Supply..........................................................................111
Figure 61: Grounding Wire Terminal...................................................................................................................................112
Figure 62: Stripping the Stranded Grounding Wire.............................................................................................................113
Figure 63: Attaching the Stranded Grounding Wire to the Grounding Terminal.................................................................113
Figure 64: On/Off Switch on the AT-SBxPWRSYS1-80 DC Power Supply........................................................................114
Figure 65: Removing the Nut and Washer from the Grounding Post .................................................................................115
Figure 66: Attaching the Grounding Lug and Wire to the Grounding Post..........................................................................116
Figure 67: Securing the Grounding Wire ............................................................................................................................117
Figure 68: Stripping the solid or Stranded Grounding Wire................................................................................................118
Figure 69: Attaching the Bare Grounding Wire to the Grounding Post...............................................................................119
Figure 70: Securing the Bare Grounding Wire to the Grounding Post................................................................................120
Figure 71: Power Wire Terminals .......................................................................................................................................121
Figure 72: Stripping the Power Wires.................................................................................................................................122
Figure 73: Attaching the Power Wires to the Straight Terminal Lugs.................................................................................122
Figure 74: Opening the Plastic Cover.................................................................................................................................123
Figure 75: Removing the Terminal Screws.........................................................................................................................124
Figure 76: Connecting the Positive (+) Power Wire with a Straight Terminal.....................................................................125
Figure 77: Connecting the Negative (-) Power Wire with a Straight Terminal ....................................................................126
Figure 78: Closing the Plastic Cover over the Terminal Connectors..................................................................................127
Figure 79: Tightening the Handle Locking Screw...............................................................................................................128
Figure 80: Attaching the Power Wires to the Right Angle Terminal Lugs...........................................................................129
Figure 81: Removing the Plastic Cover..............................................................................................................................130
Figure 82: Removing the Terminal Screws.........................................................................................................................131
Figure 83: Connecting the Positive (+) Power Wire with a Right Angle Terminal...............................................................132
Figure 84: Connecting the Negative (-) Power Wire with a Right Angle Terminal..............................................................133
Figure 85: Tightening the Handle Locking Screw...............................................................................................................134
Figure 86: Stripping Solid or Stranded DC Power Wires....................................................................................................135
Figure 87: Connecting the Positive Wire With Bare Wire ...................................................................................................136
Figure 88: Connecting the Negative Lead Wire with Bare Wire..........................................................................................137
Figure 89: Connecting the AC Power Cord.........................................................................................................................145
Figure 90: Securing the Power Cord with the Retaining Clip..............................................................................................145
Figure 91: Connecting the Power Cord to an AC Power Source........................................................................................146
Figure 92: Connecting the Management Cable to the Console RS-232 Port.....................................................................148
Figure 93: User Exec Mode Prompt....................................................................................................................................149
Figure 94: SHOW STACK Command.................................................................................................................................165
Figure 95: Handle on 100Gbps Transceivers for the AT-XEM2-1CQ Line Card................................................................169
Figure 96: Installing an SFP Transceiver in the AT-XEM2-12XS Line Card.......................................................................171
Figure 97: Installing a Fiber Optic Transceiver in the AT-XEM2-4QS Line Card................................................................171
Figure 98: Installing an 100Gbps QSFP28 Transceiver in the AT-XEM2-1CQ Line Card..................................................172
Figure 99: Installing AT-SP10TW Cables in the AT-XEM2-12XS Line Card......................................................................174
Figure 100: Sliding the AT-QSFPCU Cable into the Slot....................................................................................................174
Figure 101: Disconnecting the AC Power Cord from the Power Source ............................................................................178
Figure 102: Disconnecting the AC Power Cord from the Chassis......................................................................................179
Figure 103: Lifting the Locking Handle on the AT-SBxPWRSYS2 AC Power Supply........................................................179
Figure 104: Removing the AT-SBxPWRSYS2 AC Power Supply ......................................................................................180
Figure 105: Loosening the Screw on the Locking Handle ..................................................................................................181
Figure 106: Opening the Plastic Window over the Terminal Block.....................................................................................182
Figure 107: Removing the Negative Lead Wire..................................................................................................................183
Figure 108: Removing the Positive Lead Wire from the Terminal Block.............................................................................184
Figure 109: Reinstalling the Screws on the Positive and Negative Terminals....................................................................185

AT-SBx908 GEN2 Installation Guide for Virtual Chassis Stacking
11
Figure 110: Closing the Plastic Cover ................................................................................................................................186
Figure 111: Removing the Grounding Wire........................................................................................................................187
Figure 112: Reinstalling the Nut and Washer on the Grounding Post................................................................................188
Figure 113: Lifting the Locking Handle and Removing the Power Supply..........................................................................189
Figure 114: Installing the Blank Power Supply Slot Cover .................................................................................................190
Figure 115: Lowering the Locking Handle on the Power Supply Slot Cover......................................................................191
Figure 116: Loosening the Screws on the Ethernet Line Card...........................................................................................195
Figure 117: Disconnecting an Ethernet Line Card from the Chassis..................................................................................196
Figure 118: Sliding an Ethernet Line Card from the Chassis..............................................................................................197
Figure 119: Placing the Ethernet Line Card in its Anti-static Bag.......................................................................................198
Figure 120: Loosening the Screws on the AT-FAN08 Module ...........................................................................................199
Figure 121: Disconnecting the AT-FAN08 Module from the Chassis.................................................................................200
Figure 122: Aligning the AT-FAN08 Module in the Chassis Slot........................................................................................201
Figure 123: Seating the AT-FAN08 Module on the Connector in the Chassis ...................................................................201
Figure 124: Tightening the Two Captive Screws on the AT-FAN08 Module......................................................................202
Figure 125: Pin Layout (Front View) of the 1Gbps or 10Gbps Ports on the AT-XEM2-12XT Line Card............................216

Figures
12

13
Tables
Table 1: Twisted Pair Ports on the AT-XEM2-12XT Line Card ............................................................................................24
Table 2: Link and Activity LEDs on the AT-XEM2-12XT Line Card .....................................................................................24
Table 3: Link and Activity LEDs on the AT-XEM2-12XS Line Card .....................................................................................26
Table 4: Link and Activity Status LEDs for the AT-XEM2-4QS Line Card ...........................................................................27
Table 5: Link and Activity Status LED for the AT-XEM2-1CQ Line Card .............................................................................28
Table 6: Twisted Pair Cable for the NET MGMT Port on the Management Panel ..............................................................30
Table 7: NET MGMT Port LED ............................................................................................................................................31
Table 8: PORT Parameter Format .......................................................................................................................................37
Table 9: Software and Hardware Releases .........................................................................................................................39
Table 10: Maximum Number of Trunk Ports Per Switch ......................................................................................................49
Table 11: Stacking Worksheet .............................................................................................................................................62
Table 12: Stacking Worksheet Columns ..............................................................................................................................62
Table 13: Hardware Installation Procedures ........................................................................................................................66
Table 14: Configuring the Master Switch ...........................................................................................................................151
Table 15: Verifying the Master Switch ...............................................................................................................................154
Table 16: Configuring a Member Switch - Part I ................................................................................................................157
Table 17: Configuring the Member Switch - Part II ............................................................................................................160
Table 18: Verifying the Configuration of a Member Switch ................................................................................................161
Table 19: AT-XEM2 Line Cards and Fiber Optic Transceivers ..........................................................................................170
Table 20: AT-XEM2 Line Cards and Direct Connect Cables .............................................................................................173
Table 21: Hot-swapping Guidelines for XEM2 Line Cards ................................................................................................192
Table 22: Product Dimensions ...........................................................................................................................................210
Table 23: Product Weights ................................................................................................................................................210
Table 24: Ventilation Requirements ...................................................................................................................................211
Table 25: Environmental Specifications .............................................................................................................................212
Table 26: AC Voltage and Frequency Requirements ........................................................................................................213
Table 27: DC Voltage Requirements .................................................................................................................................213
Table 28: Maximum Power Consumption (Watts) .............................................................................................................213
Table 29: Typical Power Savings in eco-friendly Mode (Watts) ........................................................................................213
Table 30: Maximum Power Supply Efficiency (Based on 100V Input Voltage) .................................................................214
Table 31: Heat Dissipation (British Thermal Units/Hour) ...................................................................................................214
Table 32: Product Certifications .........................................................................................................................................215
Table 33: Pin Signals for 1Gbps or 10Gbps ......................................................................................................................216
Table 34: RJ-45 Pin Signals for the Console Port on the Management Panel ..................................................................217
Table 35: RJ-45 Pin Signals for 10 or 100Mbps for the NET MGMT Port on the Management Panel ..............................217

Tables
14

15
Preface
This guide contains the installation instructions for the AT-SBx908 GEN2
advanced modular, Layer 3 Ethernet switch. The instructions explain how
to build a virtual stack of up to four units with the Virtual Chassis Stacking
(VCStack) feature. For instructions on how to install the switch as a stand-
alone device, refer to the AT-SBx908 GEN2 Installation Guide for Stand-
alone Switches.
This preface contains the following sections:
“Document Conventions” on page 16
“Contacting Allied Telesis” on page 17

Preface
16
Document Conventions
This document uses the following conventions:
Note
Notes provide additional information.
Caution
Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.
Warning
Warnings inform you that performing or omitting a specific action
may result in bodily injury.

AT-SBx908 GEN2 Installation Guide for Virtual Chassis Stacking
17
Contacting Allied Telesis
If you need assistance with this product, you may contact Allied Telesis
technical support by going to the Support & Services section of the Allied
Telesis web site at www.alliedtelesis.com/support. You can find links for
the following services on this page:
24/7 Online Support — Enter our interactive support center to
search for answers to your product questions in our knowledge
database, to check support tickets, to learn about RMAs, and to
contact Allied Telesis technical experts.
USA and EMEA phone support — Select the phone number that
best fits your location and customer type.
Hardware warranty information — Learn about Allied Telesis
warranties and register your product online.
Replacement Services — Submit a Return Merchandise
Authorization (RMA) request via our interactive support center.
Documentation — View the most recent installation and user
guides, software release notes, white papers, and data sheets for
your products.
Software Downloads — Download the latest software releases for
your managed products.
For sales or corporate information, go to www.alliedtelesis.com/
purchase and select your region.

Preface
18

19
Chapter 1
Overview
The chapter contains the following sections:
“Overview” on page 20
“AT-SBx908 GEN2 Chassis” on page 22
“Ethernet Line Cards” on page 23
“AT-XEM2-12XT Line Card” on page 24
“AT-XEM2-12XS Line Card” on page 26
“AT-XEM2-4QS Line Card” on page 27
“AT-XEM2-1CQ Line Card” on page 28
“Management Panel” on page 29
“Power Supplies” on page 34
“AT-FAN08 Units” on page 36
“Specifying Ports in the Command Line Interface” on page 37
“Software and Hardware Releases” on page 39

Chapter 1: Overview
20
Overview
The AT-SBx908 GEN2 Switch is an advanced Layer 3+ modular switch.
The main features are listed here.
AT-SBx908
GEN2 Chassis The chassis has the following hardware features:
3RU height
Eight slots for Ethernet line cards
Each line card slot has 160Gbps connectivity over the backplane.
The unit supports two power supplies for primary and redundant
power.
The chassis comes with two pre-installed brackets for a standard
19-inch equipment rack.
The unit comes with two pre-installed fan modules, providing front-
to-back airflow.
The line cards, power supplies, and fan modules are hot-
swappable.
Ethernet Line
Cards The Ethernet line cards are listed here:
AT-XEM2-12XT Card features 12 1Gbps/10Gbps, twisted pair
ports with RJ-45 connectors.
AT-XEM2-12XS Card features 12 transceiver slots for 1Gbps SFP
or 10Gbps SFP+ transceivers.
AT-XEM2-4QS Card features four transceiver slots for 40Gbps
QSFP+ transceivers.
AT-XEM2-1CQ Card features one transceiver slot for a 100Gbps
QSFP28 transceiver.
Ethernet line cards are ordered separately. Refer to the product data
sheet on the Allied Telesis web site for a list of approved transceivers.
Management
Software and
Interfaces
Here are the management software and interfaces:
AlliedWare Plus management software
Command line interface, available locally through the Console port
or remotely over the network.
Web browser interface available remotely over the network.
The AlliedWare Plus management software comes pre-installed on the
chassis.