Allied Telesis XS910/8 User manual

613-003006 Rev. A
XS910/8
10 GIGABIT ETHERNET UNMANAGED SWITCH
Installation and User’s Guide

Copyright  2022 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
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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 section contains the following:
“US Federal Communications Commission”
“Industry Canada”
“Electrical Safety, Electro Magnetic Interference, Electro Magnetic Susceptibility Standards” on
page 4
“Translated Safety Statements” on page 4
US 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
Radiated Energy
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.

4
Electrical Safety, Electro Magnetic Interference, Electro
Magnetic Susceptibility Standards
Electrical Safety UL62368-1 (CULUS),
IEC62368-1 (UL-CB),
EN62368-1 (UL-EU),
CE
Electro Magnetic Interference (EMI): FCC part 15 Subpart B,
ICES-003:2020-Issue 7 Class A,
EN55035:2017/A11:2020,
EN55032:2012 / AC:2013
Class A, CISPR 32: 2012,
VCCI Class A,
RCM AS/NZS CISPR 32: 2013
Warning
In a domestic environment this product may cause radio interference in which case the user
may be required to take adequate measures.  E84
Electro Magnetic Susceptibility (EMS) EN61000-4-2: 2009,
EN61000-4-3: 2006 + A1:2008 + A2:2010,
EN61000-4-4:2012, EN61000-4-5:2014,
EN61000-4-6:2014, EN61000-4-8:2010,
EN61000-4-11:2004, EN61000-3-2:2014,
EN61000-3-3:2013
Translated Safety Statements
Important: The  indicates that translations of the safety statement are available in the PDF
document Translated Safety Statements posted on the Allied Telesis website at
alliedtelesis.com/library.

5
Preface ..................................................................................................................................................................................7
Safety Symbols Used in this Document ..........................................................................................................................8
Contacting Allied Telesis .................................................................................................................................................9
Chapter 1: Product Description ........................................................................................................................................11
Overview .......................................................................................................................................................................12
Features ........................................................................................................................................................................13
Key Features..........................................................................................................................................................13
Wall and Rack Mounting ........................................................................................................................................14
LEDs ...................................................................................................................................................................... 15
DIP Switches..........................................................................................................................................................16
100M/1G/2.5G/5G/10G Base-T Twisted Pair Ports ...............................................................................................17
Power Connector ...................................................................................................................................................17
Loop Prevention ............................................................................................................................................................18
Root Switch ............................................................................................................................................................18
Non-root Switch......................................................................................................................................................18
Examples with Multiple Loop Prevention Switches ................................................................................................19
Examples with Loop Prevention and Regular Switches.........................................................................................20
Examples within a Loop Prevention Switch............................................................................................................21
Guidelines for Loop Prevention ..............................................................................................................................21
Enabling Loop Protection .......................................................................................................................................21
Disabling Loop Protection ......................................................................................................................................21
Energy Efficiency Ethernet (EEE) .................................................................................................................................22
Enabling EEE .........................................................................................................................................................22
Disabling EEE ........................................................................................................................................................22
Ethernet Switching Basics .............................................................................................................................................23
Duplex Mode ..........................................................................................................................................................23
Store-and- Forward ................................................................................................................................................23
Flow Control ...........................................................................................................................................................23
Chapter 2: Installation .......................................................................................................................................................25
Reviewing Safety Precautions.......................................................................................................................................26
Selecting a Site and Planning the Installation ...............................................................................................................29
Unpacking the Switch....................................................................................................................................................31
Installing the Switch on a Table or Desktop ..................................................................................................................32
Guidelines for Installing the Switch on a Table or Desktop....................................................................................32
Installing the Switch on a Table or Desktop ...........................................................................................................32
Installing the Switch on a Wall.......................................................................................................................................34
Guidelines for Installing the Switch on a Wall ........................................................................................................34
Installing the Switch on a Wall ...............................................................................................................................35
Installing the Switch in an Equipment Rack...................................................................................................................36
Guidelines for Installing the Switch in a Rack ........................................................................................................36
Installing the Switch in a Rack ...............................................................................................................................36
Cabling the Switch.........................................................................................................................................................37
Powering On the Switch ................................................................................................................................................38
Chapter 3: Installation Using the AT-BRKT-J24 Wall Mount Bracket ...........................................................................41
Unpacking the AT-BRKT-J24 Wall Mount Kit................................................................................................................42
Installing the Switch on a Wall Using the AT-BRKT-J24 Brackets ................................................................................43
What to Prepare for Wall Installation......................................................................................................................43
Installing the Switch on a Wall ...............................................................................................................................43
Contents

XS910/8 Unmanaged Switch Installation and User’s Guide
6
Chapter 4: Installation Using the AT-RKMT-J14 Rack Mount Kit ..................................................................................47
Unpacking the AT-RKMT-J14 Rack Mount Kit ..............................................................................................................48
Installing a Switch Using the AT-RKMT-J14 Rack Mount Kit ........................................................................................49
What to Prepare .....................................................................................................................................................49
Installing a Switch Using the Rack Mount Kit .........................................................................................................49
Chapter 5: Installation Using the AT-RKMT-J15 Rack Mount Kit ..................................................................................51
Unpacking the AT-RKMT-J15 Rack Mount Kit ..............................................................................................................52
Installing Two Switches in a Row of the Equipment Rack.............................................................................................53
What to Prepare .....................................................................................................................................................53
Installing Two Switches in a Row of the Equipment Rack......................................................................................53
Chapter 6: Troubleshooting ..............................................................................................................................................57
Appendix A: Technical Specifications .............................................................................................................................59
Physical Specifications ..................................................................................................................................................59
Environmental Specifications.........................................................................................................................................59
Power Specifications .....................................................................................................................................................60
RJ-45 Twisted Pair Port Connectors .............................................................................................................................60

7
Preface
This manual is the installation and user’s guide for the AT-XS910/8
10 Gigabit Ethernet Unmanaged Switch.
This Preface contains the following sections:
“Safety Symbols Used in this Document” on page 8
“Contacting Allied Telesis” on page 9

XS910/8 Unmanaged Switch Installation and User’s Guide
8
Safety Symbols Used in this Document
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.

Preface
9
Contacting Allied Telesis
If you need assistance with this product, you may contact Allied Telesis
technical support by going to the Services & Support section of the Allied
Telesis web site at www.alliedtelesis.com/support. You can find links for
the following services on this page:
Helpdesk (Support Portal) - Log onto Allied Telesis interactive
support center to search for answers to your questions in our
knowledge database, check support tickets, learn about Return
Merchandise Authorizations (RMAs), and contact Allied Telesis
technical experts.
Software Downloads - Download the latest software releases for
your product.
Licensing - Register and obtain your License key to activate your
product.
Product Documents - View the most recent installation guides, user
guides, software release notes, white papers and data sheets for
your product.
Warranty - View a list of products to see if Allied Telesis warranty
applies to the product you purchased and register your warranty.
Allied Telesis Helpdesk - Contact a support representative.
To contact a sales representative or find Allied Telesis office locations, go
to www.alliedtelesis.com/contact.

XS910/8 Unmanaged Switch Installation and User’s Guide
10

11
Chapter 1
Product Description
This chapter contains the follows sections:
“Overview” on page 12
“Features” on page 13
“Loop Prevention” on page 18
“Energy Efficiency Ethernet (EEE)” on page 22
“Ethernet Switching Basics” on page 23

XS910/8 Unmanaged Switch Installation and User’s Guide
12
Overview
The AT-XS910/8 switch is an unmanaged 10 Gigabit Ethernet switch with
eight 100M/1G/2.5G/5G/10GBASE-T twisted-pair ports. This switch
provides a simple solution to integrate 100Mbps,1Gbps, 2.5Gbps, 5Gbps,
and 10Gbps devices that exist in your network and expand the network to
10Gbps speed.
The eco-friendly feature automatically saves power consumption on each
port when the port has not established a link. In addition, the switch does
not require software configuration or management.
Figure 1 shows the front panel of the AT-XS910/8 switch.
Figure 1. AT-XS910/8 Front Panel
Figure 2 shows the rear panel of the AT-XS910/8 switch.
Figure 2. AT-XS910/8 Rear Panel
The AT-XS910/8 switch can be installed on a desktop, mounted on a wall,
or mounted in a 19-inch equipment rack. To mount the switch on a wall,
use the AT-BRKT-J24 wall mount brackets. To install one switch in a row
of an equipment rack, use the AT-RKMT-J14 rack mount brackets, and
use the AT-RKMT-J15 rack mount brackets for two switches in one row.
Note
The AT-BRKT-J24, AT-RKMT-J14, and AT-RKMT-J15 brackets are
not included in the shipping box. You must purchase them
separately.

Chapter 1: Product Description
13
Features
This section describe the features of the AT-XS910/8 switch.
Key Features Here is a list of key features:
Eight 100M/1G/2.5G/5G/10GBASE-T twisted pair ports with RJ-45
connectors
IEEE802.3u compliant for 100Base-TX
IEEE802.3ab compliant for 1000Base-T
IEEE802.3bz compliant for 2.5GBase-T and 5GBase-T
IEEE802.3an compliant for 10Gbps Ethernet
IEEE 802.3az Energy Efficient Ethernet, which is enabled or
disabled from the DIP switch on the front panel
Auto-Negotiation
Store-and-Forward switching method
Jumbo frames of 12Kbytes (inclusive) without frame loss and drop
packet, which is larger than 12Kbytes (exclusive)
Up to 16,384 MAC address entries
Link down power saving
IEEE 802.3x pause frame in the full-duplex mode
Loop Detection and Prevention, which is enabled or disabled from
the DIP switch on the front panel
Diagnostic LEDs
RoHS compliant
Wall mounting
Equipment Rack mounting with one or two units in a row.

XS910/8 Unmanaged Switch Installation and User’s Guide
14
Wall and Rack
Mounting
The switch can be installed on a table top, wall, and equipment rack.
Table 1 shows optional brackets for the AT-XS910/8 switch.
Table 1. Wall and Rack Mount Brackets
Installation Optional Mount
Kit
Wall
AT-BRKT-J24
Equipment Rack:
one switch in a
row
AT-RKMT-J14
Equipment Rack:
two switches in a
row
AT-RKMT-J15

Chapter 1: Product Description
15
LEDs The LEDs on the front panel of the AT-XS910/8 switch display status
information. See Figure 3.
x
Figure 3. Switch LEDs
Table 2 describes the switch LEDs.
The LEDs on the ports display status information. The LED at the left
corner of the port indicates the link/activity; the LED on the right corner
indicates the speed and status of Loop Prevention. See Figure 4.
x
Figure 4. Port LEDs
Table 2. LEDs for the Switch
LED State Description
SYSTEM Red The system is booting up.
Off The system is operating normally.
LOOP Green Loop Prevention is enabled.
Blinking
Green
A loop has been detected and the
switch blocks the looped port to stop the
loop.
Off Loop Prevention is disabled.
POWER Green The switch is powered on.
Off The switch is not receiving power.
Link / Activity Speed / Loop

XS910/8 Unmanaged Switch Installation and User’s Guide
16
Table 3 describes the Port LEDs.
DIP Switches The switch has two DIP switches on the front panel. You can turn on or off
Loop Prevention and Energy Efficient Ethernet (EEE). See Figure 5.
When the DIP switch is in the up position, a function is enabled; the DIP
switch is in the down position, the function is disabled.
x
Figure 5. DIP Switches
For more information about Loop Prevention: see “Loop Prevention” on
page 18, and for EEE, see “Energy Efficiency Ethernet (EEE)” on page 22.
Table 3. LEDs for the Ports
LED State Description
Link/Activity Green The port has established a link to a
network device.
Blinking
Green
The port is transmitting or receiving
frames.
Off The port has not established a link with a
network device.
Speed/Loop Green The port is operating at 2.5G/5G/10Gbps.
Amber The port is operating at 100/1000Mbps.
Blinking
Green
A loop is detected while the port is
operating at 2.5/5/10Gbps. The switch
blocks the looped port to stop the loop.
Blinking
Amber
A loop is detected while the port is
operating at 100/1000Mbps. The switch
blocks the looped port to stop the loop.
Off No link is established at the port.

Chapter 1: Product Description
17
100M/1G/2.5G/5
G/10G Base-T
Twisted Pair
Ports
The AT-XS910/8 switch is equipped with eight 100M/1G/2.5G/5G/10G
BASE-T twisted pair ports
Connector
All twisted pair ports feature 8-pin RJ-45 connectors. For the port pinouts,
see “RJ-45 Twisted Pair Port Connectors” on page 60.
Speed
The ports are 100M/1G/2.5G/5G/10G BASE-T compliant and capable of
100 Mbps, 1Gbps, 2.5Gbps, 5Gbps and 10Gbps speeds. The ports are
IEEE 802.3u Auto-Negotiation compliant. With Auto-Negotiation, the
switch automatically matches the highest possible common speed
between the switch port and its end-node.
Duplex Mode
The twisted pair ports on the switch operate in the full-duplex mode.
Auto MDI/MDI-X
All of the twisted pair ports on the switch feature auto-MDI to automatically
configure themselves as MDI or MDI-X when connected to an end-node.
Consequently, you can use a straight-through twisted pair cable to
connect any network device to a port.
Power Connector The switch has a single AC power supply socket on the back panel as
shown in Figure 2 on page 12. To power ON or OFF the switch, connect or
disconnect the power cord.

XS910/8 Unmanaged Switch Installation and User’s Guide
18
Loop Prevention
The AT-XS910/8 switch is equipped with Loop Prevention, a feature that
detects loops and blocks ports in order to reduce negative effects on the
local network while keeping connectivity of devices. Loops in Ethernet
networks can cause broadcast storms that consume network bandwidth
and reduce network performance.
When Loop Prevention is enabled, the switch sends Loop Prevention
frames periodically and detects a loop in the LAN when a port receives the
Loop Prevention frame sent by the port itself. Then, the switch applies the
loop prevention algorithm to block ports to relieve the loop.
When the switch detects a loop and blocks a port, the following actions are
taken:
The Loop LED starts blinking.
The LED of the blocked port starts blinking.
Root Switch In a topology with multiple AT-XS910/8 switches, they elect a root switch
when Loop Prevention is enabled on all the switches. Initially, these
switches are all root switches. They send Loop Prevention frames and
elect the root switch by comparing their switch priorities. The switch with
the highest switch priority becomes the root switch. When multiple
switches have the same highest switch priority, the switch with the lowest
MAC address becomes the root switch.
Non-root Switch The switches, which are not selected as the root switch, are non-root
switches. The root switch sends Loop Prevention frames from its ports
every two seconds. A non-root switch updates the Loop Prevention frames
and forwards them. A non-root switch also maintains a timer for each port
and sets a timer to 16 seconds. When receiving a Loop Prevention frame
at a port, a non-root switch refreshes the timer of the port. When all timers
of the non-root switch reach zero, the non-root switch changes itself to a
root switch and sends Loop Prevention frames.

Chapter 1: Product Description
19
Examples with
Multiple Loop
Prevention
Switches
In examples shown in Figure 6, multiple AT-XS910/8 switches form links
and all switches are Loop Prevention enabled. Switch C has a lower MAC
address than Switch A and Switch B; Switch B has a lower MAC address
than Switch A.
First, these switches elect a root switch by comparing the MAC addresses.
In cases 1 and 2, Switch B is elected as a root switch; in case 3, Switch C
is elected as a root switch.
Then the root switch initiates Loop Prevention frames and non-root
switches update the frames and forward them. When detecting a loop, the
root switch runs the Loop Prevention algorithm to decide which port to
block, and blocks a port or ports to relieve the loop.
x
Figure 6. Multiple AT-XS910/8 Switches for Loop Prevention

XS910/8 Unmanaged Switch Installation and User’s Guide
20
Examples with
Loop Prevention
and Regular
Switches
In examples shown in Figure 7, the AT-XS910/8 switch and a regular
switch form links. When Loop Prevention is enabled, the AT-XS910/8
switch sends Loop Prevention frames. When detecting a loop, the switch
blocks a port or ports except the port with the smallest number.
x
Figure 7. AT-XS910/8 and Regular Switches for Loop Prevention
In an example shown in Figure 8, the AT-XS910/8 switch and a regular
switch form a link. The regular switch is causing a loop. When receiving a
Loop Prevention frame, the AT-XS910/8 switch blocks its port.
x
Figure 8. AT-XS910/8 and Regular Switches for Loop Prevention - Case 3