Allied Telesis SwitchBlade x908 GEN2 User manual

613-002443 Rev. D
SwitchBlade x908 GEN2 (SBx908 GEN2) Switch
Advanced Layer 3+ Modular Switch
AlliedWare Plus™ v5.4.9-2
SBx908 GEN2 Chassis
XEM2-8XSTm Ethernet Line Card
XEM2-12XT Ethernet Line Card
XEM2-12XTm Ethernet Line Card
XEM2-12XS Ethernet Line Card
XEM2-4QS Ethernet Line Card
XEM2-1CQ Ethernet Line Card
FAN08 Fan Module
SBxPWRSYS2 AC Power Supply
SBxPWRSYS1-80 DC Power Supply
Installation Guide for Stand-alone
Switches

Copyright ©2020 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/library.
Remarque: Les consignes de sécurité portant le symbole sont traduites dans plusieurs langues
dans le document Translated Safety Statements, disponible à l'adresse www.alliedtelesis.com/
library.

5
Preface ...............................................................................................................................................................................13
Document Conventions .......................................................................................................................................................14
Contacting Allied Telesis .....................................................................................................................................................15
Chapter 1: Overview ........................................................................................................................................................ 17
Overview..............................................................................................................................................................................18
SBx908 GEN2 Chassis ................................................................................................................................................18
XEM2 Ethernet Line Cards...........................................................................................................................................18
Management Software and Interfaces .........................................................................................................................18
Management Methods..................................................................................................................................................19
Management Panel ......................................................................................................................................................19
Power Supplies ............................................................................................................................................................19
SBx908 GEN2 Chassis .......................................................................................................................................................20
XEM2 Ethernet Line Cards..................................................................................................................................................21
XEM2-8XSTm Line Card.....................................................................................................................................................24
Twisted Pair Ports ........................................................................................................................................................24
Twisted Pair Port LEDs ................................................................................................................................................25
Transceiver Ports .........................................................................................................................................................26
Transceiver Port LEDs .................................................................................................................................................26
XEM2-12XT Line Card ........................................................................................................................................................27
Twisted Pair Ports ........................................................................................................................................................27
LEDs.............................................................................................................................................................................28
XEM2-12XTm Line Card......................................................................................................................................................29
Twisted Pair Ports ........................................................................................................................................................29
LEDs.............................................................................................................................................................................30
XEM2-12XS Line Card ........................................................................................................................................................31
Transceiver Ports .........................................................................................................................................................31
LEDs.............................................................................................................................................................................32
XEM2-4QS Line Card..........................................................................................................................................................33
Transceiver Ports .........................................................................................................................................................33
LEDs.............................................................................................................................................................................33
XEM2-1CQ Line Card..........................................................................................................................................................35
Transceiver Port...........................................................................................................................................................35
LEDs.............................................................................................................................................................................35
Management Panel .............................................................................................................................................................37
USB Port ......................................................................................................................................................................37
NET MGMT Ethernet Management Port......................................................................................................................38
Console (RS-232) Port.................................................................................................................................................39
Switch ID LED ..............................................................................................................................................................39
eco-friendly Button .......................................................................................................................................................40
Reset Button.................................................................................................................................................................40
Power Supplies....................................................................................................................................................................41
FAN08 Units ........................................................................................................................................................................43
Specifying Ports in the Command Line Interface.................................................................................................................44
Software and Hardware Releases.......................................................................................................................................45
Chapter 2: Beginning the Installation ............................................................................................................................ 47
Reviewing Safety Precautions.............................................................................................................................................48
Choosing a Site for the Chassis ..........................................................................................................................................53
Unpacking the Chassis........................................................................................................................................................54
Contents

Contents
6
Unpacking SBxPWRSYS2 AC Power Supplies.................................................................................................................. 59
Unpacking SBxPWRSYS1-80 DC Power Supplies ............................................................................................................ 60
Chapter 3: Installing the Chassis ...................................................................................................................................61
Tools and Material .............................................................................................................................................................. 62
Adjusting the Equipment Rack Brackets............................................................................................................................. 63
Installing the Chassis in an Equipment Rack...................................................................................................................... 67
Installing the Chassis Grounding Wire................................................................................................................................ 68
Installing SBxPWRSYS2 AC Power Supplies..................................................................................................................... 71
Installing SBxPWRSYS1-80 DC Power Supplies............................................................................................................... 75
Installing Ethernet Line Cards............................................................................................................................................. 79
Installing Blank Line Card Slot Covers................................................................................................................................ 83
Installing the Blank Power Supply Slot Cover..................................................................................................................... 85
Installing the Power Cord Retaining Clips........................................................................................................................... 87
Chapter 4: Powering On the Chassis .............................................................................................................................89
Verifying the Installation...................................................................................................................................................... 90
Powering On SBxPWRSYS2 Power Supplies.................................................................................................................... 91
Powering On SBxPWRSYS1-80 DC Power Supplies......................................................................................................... 94
Choosing a Method for Attaching the Grounding Wire................................................................................................ 96
Connecting the Grounding Wire with the Grounding Terminal.................................................................................... 96
Connecting the Grounding Wire with Bare Wire........................................................................................................ 101
Choosing a Method for Attaching the Power Wires................................................................................................... 103
Connecting the DC Power Wires with the Straight Terminals ................................................................................... 103
Connecting the DC Power Wires with the Right Angle Terminals............................................................................. 111
Connecting Bare DC Power Wires ............................................................................................................................ 117
Monitoring the Initialization Processes.............................................................................................................................. 121
Chapter 5: Verifying the Hardware Operations ...........................................................................................................125
Determining the Status of the Switch................................................................................................................................ 126
Starting a Local Management Session............................................................................................................................. 127
Disabling VCStack............................................................................................................................................................ 129
Verifying Support for the Ethernet Line Cards.................................................................................................................. 133
Verifying the Switch with the AlliedWare Plus Commands ............................................................................................... 134
Chapter 6: Cabling the Networking Ports ....................................................................................................................135
Cabling Twisted Pair Ports................................................................................................................................................ 136
Guidelines to Handling Fiber Optic or Twisted Pair Transceivers..................................................................................... 137
Installing and Cabling Fiber Optic Transceivers ............................................................................................................... 138
Installing Direct Connect Cables....................................................................................................................................... 141
Chapter 7: Replacing Modules .....................................................................................................................................145
Replacing SBxPWRSYS2 AC Power Supplies................................................................................................................. 146
Replacing SBxPWRSYS1-80 DC Power Supplies ........................................................................................................... 149
Replacing XEM2 Line Cards............................................................................................................................................. 160
Replacing FAN08 Modules............................................................................................................................................... 167
Removing FAN08 Modules........................................................................................................................................ 167
Installing FAN08 Modules.......................................................................................................................................... 168
Chapter 8: Troubleshooting ..........................................................................................................................................171
Appendix A: Technical Specifications .........................................................................................................................175
Physical Specifications ..................................................................................................................................................... 176
Environmental Specifications............................................................................................................................................ 179
Power Specifications......................................................................................................................................................... 180
Certifications..................................................................................................................................................................... 182
Pin Signals for RJ-45 Twisted Pair Ports.......................................................................................................................... 183
Pin Signals for the RJ-45 Style Serial Console Port......................................................................................................... 185
Pin Signals for the NET MGMT Port................................................................................................................................. 186

7
Figure 1: Front Panel of the SBx908 GEN2 Chassis............................................................................................................20
Figure 2: Rear Panel of the SBx908 GEN2 Chassis ............................................................................................................20
Figure 3: XEM2 Ethernet Line Cards....................................................................................................................................21
Figure 4: XEM2-8XSTm Line Card.......................................................................................................................................24
Figure 5: XEM2-12XT Line Card..........................................................................................................................................27
Figure 6: XEM2-12XTm Line Card.......................................................................................................................................29
Figure 7: XEM2-12XS Line Card..........................................................................................................................................31
Figure 8: XEM2-4QS Line Card............................................................................................................................................33
Figure 9: XEM2-1CQ Line Card............................................................................................................................................35
Figure 10: Management Panel .............................................................................................................................................37
Figure 11: Switch ID LED.....................................................................................................................................................39
Figure 12: SBxPWRSYS2 and SBxPWRSYS1-80 Power Supplies.....................................................................................41
Figure 13: FAN08 Module ....................................................................................................................................................43
Figure 14: PORT Parameter in the Command Line Interface...............................................................................................44
Figure 15: NEMA 5-20P Plug and Receptacle .....................................................................................................................53
Figure 16: SBx908 Gen2 Switch Shipping Box ....................................................................................................................54
Figure 17: Lifting the Switch from the Shipping Box.............................................................................................................55
Figure 18: Removing the Switch from the Protective Shipping Bag.....................................................................................55
Figure 19: Pre-installed Items on the Front and Side Panels...............................................................................................56
Figure 20: Pre-installed Items on the Rear Panel.................................................................................................................57
Figure 21: Accessory Kit.......................................................................................................................................................58
Figure 22: Items in the Shipping Box for the SBxPWRSYS2 AC Power Supply..................................................................59
Figure 23: Items in the Shipping Box for the SBxPWRSYS1-80 DC Power Supply.............................................................60
Figure 24: Chassis Orientations in the Equipment Rack......................................................................................................63
Figure 25: Chassis Orientations in the Equipment Rack......................................................................................................64
Figure 26: Chassis Orientations in the Equipment Rack......................................................................................................65
Figure 27: Example of Adjusting the Equipment Rack Brackets ..........................................................................................66
Figure 28: Securing the Chassis to the Equipment Rack.....................................................................................................67
Figure 29: Stripping the Grounding Wire..............................................................................................................................68
Figure 30: Removing the Grounding Lug from the Chassis..................................................................................................69
Figure 31: Attaching the Grounding Wire to the Grounding Lug...........................................................................................69
Figure 32: Installing the Grounding Lug and Wire................................................................................................................70
Figure 33: Removing the Blank Power Supply Panel from Power Supply Slot B.................................................................72
Figure 34: Lifting the Locking Handle on the SBxPWRSYS2 Power Supply........................................................................72
Figure 35: Sliding the SBxPWRSYS2 AC Power Supply into the Chassis...........................................................................73
Figure 36: Lowering the Locking Handle on the SBxPWRSYS2 AC Power Supply.............................................................73
Figure 37: On/Off Switch on the SBxPWRSYS1-80 DC Power Supply................................................................................75
Figure 38: Loosening the Handle locking Screw on the SBxPWRSYS1-80 DC Power Supply............................................76
Figure 39: Lifting the Locking Handle on the SBxPWRSYS1-80 DC Power Supply ............................................................76
Figure 40: Inserting the SBxPWRSYS1-80 DC Power Supply.............................................................................................77
Figure 41: Lowering the Locking Handle on the SBxPWRSYS1-80 DC Power Supply .......................................................77
Figure 42: Removing a Blank Line Card Cover....................................................................................................................79
Figure 43: Removing the Ethernet Line Card from the Anti-static Bag.................................................................................80
Figure 44: Sliding the Ethernet Line Card into the Slot.........................................................................................................81
Figure 45: Seating an Ethernet Line Card in the Chassis.....................................................................................................82
Figure 46: Tightening the Two Captive Screws on the Ethernet Line Card..........................................................................82
Figure 47: Installing a Blank Slot Cover................................................................................................................................83
Figure 48: Tightening the Captive Screws on a Blank Slot Cover........................................................................................84
Figure 49: Lifting the Locking Handle on the Blank Power Supply Slot Cover.....................................................................85
Figures

Figures
8
Figure 50: Aligning the Blank Power Supply Cover in the Slot.............................................................................................86
Figure 51: Lowering the Locking Handle on the Blank Power Supply Slot Cover ................................................................86
Figure 52: Installing the Power Cord Retaining Clips ...........................................................................................................87
Figure 53: Connecting the AC Power Cord...........................................................................................................................92
Figure 54: Securing the Power Cord with the Retaining Clip................................................................................................92
Figure 55: Connecting the Power Cord to an AC Power Source..........................................................................................93
Figure 56: Components on the SBxPWRSYS1-80 DC Power Supply..................................................................................95
Figure 57: Grounding Wire Terminal.....................................................................................................................................96
Figure 58: Stripping the Stranded Grounding Wire...............................................................................................................96
Figure 59: Attaching the Stranded Grounding Wire to the Grounding Terminal...................................................................96
Figure 60: On/Off Switch on the SBxPWRSYS1-80 DC Power Supply................................................................................97
Figure 61: Removing the Nut and Washer from the Grounding Post ...................................................................................98
Figure 62: Attaching the Grounding Lug and Wire to the Grounding Post............................................................................99
Figure 63: Securing the Grounding Wire ............................................................................................................................100
Figure 64: Stripping the solid or Stranded Grounding Wire................................................................................................101
Figure 65: Attaching the Bare Grounding Wire to the Grounding Post...............................................................................101
Figure 66: Securing the Bare Grounding Wire to the Grounding Post................................................................................102
Figure 67: Power Wire Terminals .......................................................................................................................................103
Figure 68: Stripping the Power Wires.................................................................................................................................104
Figure 69: Attaching the Power Wires to the Straight Terminal Lugs.................................................................................104
Figure 70: Opening the Plastic Cover.................................................................................................................................105
Figure 71: Removing the Terminal Screws.........................................................................................................................106
Figure 72: Connecting the Positive (+) Power Wire with a Straight Terminal.....................................................................107
Figure 73: Connecting the Negative (-) Power Wire with a Straight Terminal ....................................................................108
Figure 74: Closing the Plastic Cover over the Terminal Connectors..................................................................................109
Figure 75: Tightening the Handle Locking Screw...............................................................................................................110
Figure 76: Attaching the Power Wires to the Right Angle Terminal Lugs...........................................................................111
Figure 77: Removing the Plastic Cover..............................................................................................................................112
Figure 78: Removing the Terminal Screws.........................................................................................................................113
Figure 79: Connecting the Positive (+) Power Wire with a Right Angle Terminal...............................................................114
Figure 80: Connecting the Negative (-) Power Wire with a Right Angle Terminal..............................................................115
Figure 81: Tightening the Handle Locking Screw...............................................................................................................116
Figure 82: Stripping Solid or Stranded DC Power Wires....................................................................................................117
Figure 83: Connecting the Positive Wire With Bare Wire ...................................................................................................118
Figure 84: Connecting the Negative Lead Wire with Bare Wire..........................................................................................119
Figure 85: Switch Initialization Messages...........................................................................................................................121
Figure 86: Switch Initialization Messages (Continued).......................................................................................................122
Figure 87: Switch Initialization Messages (Continued).......................................................................................................123
Figure 88: Connecting the Management Cable to the Console RS-232 Port.....................................................................127
Figure 89: User Exec Mode Prompt....................................................................................................................................128
Figure 90: SHOW STACK Command.................................................................................................................................130
Figure 91: Moving to the Global Configuration Mode .........................................................................................................130
Figure 92: Confirmation Prompt for the NO STACK ENABLE Command..........................................................................131
Figure 93: Disabling VCStack.............................................................................................................................................131
Figure 94: Returning to the Privileged Exec Mode .............................................................................................................131
Figure 95: Saving the Changes with the WRITE Command...............................................................................................131
Figure 96: SHOW CARD Command...................................................................................................................................134
Figure 97: Handle on 100Gbps Transceivers for the XEM2-1CQ Line Card......................................................................137
Figure 98: Installing an SFP Transceiver in the XEM2-12XS Line Card.............................................................................139
Figure 99: Installing a Fiber Optic Transceiver in the XEM2-4QS Line Card......................................................................139
Figure 100: Installing an 100Gbps QSFP28 Transceiver in the XEM2-1CQ Line Card......................................................140
Figure 101: Installing SP10TW Cables in the XEM2-12XS Line Card................................................................................142
Figure 102: Sliding the QSFPCU Cable into the Slot..........................................................................................................142
Figure 103: Disconnecting the AC Power Cord from the Power Source ............................................................................146
Figure 104: Disconnecting the AC Power Cord from the Chassis......................................................................................147
Figure 105: Lifting the Locking Handle on the SBxPWRSYS2 AC Power Supply..............................................................147
Figure 106: Removing the SBxPWRSYS2 AC Power Supply............................................................................................148
Figure 107: Loosening the Screw on the Locking Handle ..................................................................................................149
Figure 108: Opening the Plastic Window over the Terminal Block.....................................................................................150
Figure 109: Removing the Negative Lead Wire..................................................................................................................151

AT-SBx908 GEN2 Installation Guide for Stand-alone Switches
9
Figure 110: Removing the Positive Lead Wire from the Terminal Block ............................................................................152
Figure 111: Reinstalling the Screws on the Positive and Negative Terminals....................................................................153
Figure 112: Closing the Plastic Cover ................................................................................................................................154
Figure 113: Removing the Grounding Wire........................................................................................................................155
Figure 114: Reinstalling the Nut and Washer on the Grounding Post................................................................................156
Figure 115: Lifting the Locking Handle and Removing the Power Supply..........................................................................157
Figure 116: Installing the Blank Power Supply Slot Cover .................................................................................................158
Figure 117: Lowering the Locking Handle on the Power Supply Slot Cover......................................................................159
Figure 118: Loosening the Screws on the Ethernet Line Card...........................................................................................163
Figure 119: Disconnecting an Ethernet Line Card from the Chassis..................................................................................164
Figure 120: Sliding an Ethernet Line Card from the Chassis..............................................................................................165
Figure 121: Placing the Ethernet Line Card in its Anti-static Bag.......................................................................................166
Figure 122: Loosening the Screws on the FAN08 Module.................................................................................................167
Figure 123: Disconnecting the FAN08 Module from the Chassis.......................................................................................168
Figure 124: Aligning the FAN08 Module in the Chassis Slot..............................................................................................169
Figure 125: Seating the FAN08 Module on the Connector in the Chassis.........................................................................169
Figure 126: Tightening the Two Captive Screws on the FAN08 Module............................................................................170
Figure 127: Switch Height and Width.................................................................................................................................176
Figure 128: Switch Depth and Locations of Bracket Holes.................................................................................................177
Figure 129: Pin Layout (Front View) of Twisted Pair Ports.................................................................................................183

Figures
10

11
Tables
Table 1: XEM2 Series Line Cards .......................................................................................................................................22
Table 2: Twisted Pair Ports on the XEM2-8XSTm Line Card ..............................................................................................24
Table 3: Link and Activity LEDs for the Twisted Pair Ports on the XEM2-8XSTm Line Card ..............................................25
Table 4: Link and Activity LEDs for the SFP Ports on the XEM2-8XSTm Line Card ...........................................................26
Table 5: Twisted Pair Ports on the XEM2-12XT Line Card .................................................................................................27
Table 6: Link and Activity LEDs on the XEM2-12XT Line Card ...........................................................................................28
Table 7: Twisted Pair Ports on the XEM2-12XTm Line Card ..............................................................................................29
Table 8: Link and Activity LEDs on the XEM2-12XTm Line Card ........................................................................................30
Table 9: Link and Activity LEDs on the XEM2-12XS Line Card ...........................................................................................32
Table 10: Link and Activity LEDs on the XEM2-4QS Line Card ..........................................................................................33
Table 11: Link and Activity LED on the XEM2-1CQ Line Card ............................................................................................35
Table 12: NET MGMT Port LED ..........................................................................................................................................38
Table 13: PORT Parameter Format .....................................................................................................................................44
Table 14: Software and Hardware Releases .......................................................................................................................45
Table 15: XEM2 Line Cards and Fiber Optic Transceivers ...............................................................................................138
Table 16: XEM2 Line Cards and Direct Connect Cables ...................................................................................................141
Table 17: Hotswapping Guidelines for XEM2 Line Cards ..................................................................................................160
Table 18: Product Dimensions ...........................................................................................................................................176
Table 19: Product Weights ................................................................................................................................................178
Table 20: Ventilation Requirements ...................................................................................................................................178
Table 21: Environmental Specifications .............................................................................................................................179
Table 22: AC Voltage and Frequency Requirements ........................................................................................................180
Table 23: DC Voltage Requirements .................................................................................................................................180
Table 24: Maximum Power Consumption (Watts) .............................................................................................................180
Table 25: Typical Power Savings in eco-friendly Mode (Watts) ........................................................................................181
Table 26: Maximum Power Supply Efficiency (Based on 100V Input Voltage) .................................................................181
Table 27: Heat Dissipation (British Thermal Units/Hour) ...................................................................................................181
Table 28: Product Certifications .........................................................................................................................................182
Table 29: Pin Signals on RJ-45 Twisted Pair Ports at 100Mbps ......................................................................................183
Table 30: Pin Signals on Twisted Pair Ports at 1/2.5/5/10Gbps ........................................................................................184
Table 31: RJ-45 Pin Signals for the Console Port on the Management Panel ..................................................................185
Table 32: RJ-45 Pin Signals for 10 or 100Mbps for the NET MGMT Port on the Management Panel ..............................186

Tables
12

13
Preface
This guide contains the installation instructions for the SBx908 GEN2
advanced modular, Layer 3 Ethernet switch. The instructions explain how
to install the chassis as a stand-alone switch. For instructions on how to
build a stack of up to four chassis with the VCStack feature, refer to the
SBx908 GEN2 Installation Guide for VCStack.
This preface contains the following sections:
“Document Conventions” on page 14
“Contacting Allied Telesis” on page 15

Preface
14
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.

SBx908 GEN2 Installation Guide for Stand-alone Switches
15
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
16

17
Chapter 1
Overview
The chapter contains the following sections:
“Overview” on page 18
“SBx908 GEN2 Chassis” on page 20
“XEM2 Ethernet Line Cards” on page 21
“XEM2-8XSTm Line Card” on page 24
“XEM2-12XT Line Card” on page 27
“XEM2-12XTm Line Card” on page 29
“XEM2-12XS Line Card” on page 31
“XEM2-4QS Line Card” on page 33
“XEM2-1CQ Line Card” on page 35
“Management Panel” on page 37
“Power Supplies” on page 41
“FAN08 Units” on page 43
“Specifying Ports in the Command Line Interface” on page 44
“Software and Hardware Releases” on page 45

Chapter 1: Overview
18
Overview
The SBx908 GEN2 Chassis is an advanced Layer 3+ modular switch. The
main features are listed here.
SBx908 GEN2
Chassis The chassis has the following hardware features:
3RU height
Eight slots for XEM2 Ethernet line cards
Each line card slot has 160Gbps backplane connectivity.
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.
XEM2 Ethernet
Line Cards The XEM2 Ethernet line cards are listed here:
XEM2-8XSTm Card features four 100Mbps and 1/2.5/5/10Gbps,
twisted pair ports with RJ-45 connectors and four ports for 1Gbps
SFP or 10Gbps SFP+ transceivers.
XEM2-12XT Card features 12 100Mbps and 1/10Gbps, twisted
pair ports with RJ-45 connectors.
XEM2-12XTm Card features 12 100Mbps and 1/2.5/5/10Gbps,
twisted pair ports with RJ-45 connectors.
XEM2-12XS Card features 12 ports for 1Gbps SFP or 10Gbps
SFP+ transceivers.
XEM2-4QS Card features four ports for 40Gbps QSFP+
transceivers.
XEM2-1CQ Card features one port for an 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.

x908 GEN2 Installation Guide for Stand-alone Switches
19
Web browser interface available remotely over the network.
The AlliedWare Plus management software comes pre-installed on the
chassis.
Management
Methods You can manage the switch as follows:
Command line interface accessed locally through the Console port
or remotely using Telnet or Secure Shell.
Web browser interface accessed remotely using HTTP.
Remote access of SNMPv1, v2c, or v3.
Management
Panel The pre-installed management panel has the following features:
Console RS-232 port for local management (no IP address
required),
USB 2.0 port for storing backup copies of system configuration
files, transferring management software among units, and other
management functions.
An eco-friendly button for turning off the system LEDs to reduce
power consumption.
Network management port for initial configuration and
maintenance access to the chassis.
Chassis reset button.
Power Supplies The chassis has slots for two power supplies. A single power supply can
support a full chassis. Adding a second power supply provides power
redundancy. Power supplies are ordered separately. Refer to “Power
Supplies” on page 41.

Chapter 1: Overview
20
SBx908 GEN2 Chassis
The front panel of the SBx908 GEN2 Chassis is shown in Figure 1.
Figure 1. Front Panel of the SBx908 GEN2 Chassis
Note
The switch comes with slot covers on line card slots 2 to 8. Do not
remove the slot covers until after the unit is installed in the
equipment rack. You might bend the chassis and cause
misalignment of the slots and card guides if you lift the chassis into
the equipment rack without the line card slot covers.
The rear panel is shown in Figure 2.
Figure 2. Rear Panel of the SBx908 GEN2 Chassis
Eight Slots for XEM2 Ethernet
Power Supply Slot (PSU A)
Power Supply Slot (PSU B)
with Blank Cover
Management Panel
Line Cards
Ground Wire Lug
AC Input
Power Connectors
AT-FAN08 Fan Units