Allied Telesis AT-DC2552XS User manual

613-002097 Rev. A
AT-DC2552XS/L3
ENTERPRISE CORE SWITCH
Installation Guide

Copyright 2015 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
Allied Telesis 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, EN55022 Class A, CISPR 22 Class A, VCCI Class A,
C-TICK
EMC (Immunity) EN55024, EN61000-3-2, EN61000-3-3
Electrical Safety EN60950-1 (TUV), UL 60950-1 (CULUS)
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: The indicates that translations of the safety statement are available in the PDF
document “Translated Safety Statements” posted on the Allied Telesis website at
www.alliedtelesis.com.

5
Contents
Preface .............................................................................................................................................................................. 11
Document Conventions .......................................................................................................................................................12
Contacting Allied Telesis .....................................................................................................................................................13
Chapter 1: Overview ........................................................................................................................................................ 15
AT-DC2552XS / L3 Features...............................................................................................................................................16
AT-DC2552XS/L3 Functions ........................................................................................................................................16
System Capacity ..........................................................................................................................................................16
AT-DC2552XS/L3 Physical Description .......................................................................................................................19
LEDs....................................................................................................................................................................................24
SFP+ Slot LED .............................................................................................................................................................24
QSFP+ Slot LEDs.........................................................................................................................................................25
Power/Fault LED ..........................................................................................................................................................26
NET MGMT LED ..........................................................................................................................................................27
FAN Status LEDs .........................................................................................................................................................28
AC Power LED .............................................................................................................................................................29
Console Port........................................................................................................................................................................30
AT-PWR06 Power Supply Module.......................................................................................................................................31
AT-FAN06 Fan Module........................................................................................................................................................33
Chapter 2: VCStack Overview ........................................................................................................................................ 35
VCStack Introduction...........................................................................................................................................................36
Features of Virtual Chassis Stacking............................................................................................................................36
VCStack Capable Switches..........................................................................................................................................36
The Physical Stack.......................................................................................................................................................37
Resilient Stacked Topology..........................................................................................................................................38
Stack Formation ..................................................................................................................................................................42
The Role of the Stack Master.......................................................................................................................................42
Chapter 3: Beginning the Installation ............................................................................................................................ 45
Installation Overview ...........................................................................................................................................................46
Reviewing Safety Precautions.............................................................................................................................................47
Planning the Installation ......................................................................................................................................................51
Unpacking the Switch ..........................................................................................................................................................52
AT-DC2552XS/L3 Switch .............................................................................................................................................52
AT-PWR06 Power Supply ............................................................................................................................................53
AT-FAN06 Fan Module ................................................................................................................................................54
Chapter 4: Installing the Switch and Modules .............................................................................................................. 55
Installing the Switch on a Desktop.......................................................................................................................................56
Installing the Switch in an Equipment Rack.........................................................................................................................57
Installing and Replacing AT-PWR06 Power Supply Module ...............................................................................................60
Installing Power Supply Module ...................................................................................................................................60
Replacing Power Supply Module .................................................................................................................................62
Installing Power Supply Blank Cover............................................................................................................................63
Installing and Replacing AT-FAN06 Fan Module.................................................................................................................64
Installing Fan Module ...................................................................................................................................................64
Replacing Fan Module .................................................................................................................................................66
Chapter 5: Installing the SFP+ and QSFP+ Transceivers and Cables ........................................................................ 67
Installing SFP+ Transceivers and Cables............................................................................................................................68
General Guidelines.......................................................................................................................................................68

Contents
6
Installing SFP+ Transceiver......................................................................................................................................... 69
Installing an SFP+ Direct Attach Cable ....................................................................................................................... 71
Installing QSFP+ Transceivers and Cables ........................................................................................................................ 73
Installing a QSFP+ Transceiver................................................................................................................................... 73
Installing a QSFP+ MTHTP Cable............................................................................................................................... 75
Chapter 6: Powering the Switch ..................................................................................................................................... 77
Powering On the Switch...................................................................................................................................................... 78
Turning Off the Switch ........................................................................................................................................................ 80
Chapter 7: Managing the Switch .................................................................................................................................... 81
Local Management ............................................................................................................................................................. 82
Connecting the Console Port....................................................................................................................................... 82
Remote Network Management ........................................................................................................................................... 84
NET MGMT Cable Installation..................................................................................................................................... 84
Chapter 8: Troubleshooting ............................................................................................................................................ 87
Appendix A: Technical Specifications ........................................................................................................................... 91
Physical Specifications ....................................................................................................................................................... 91
Environmental Specifications.............................................................................................................................................. 92
Power Specifications........................................................................................................................................................... 92
Certifications ....................................................................................................................................................................... 92
Console Port Pinouts .......................................................................................................................................................... 93
RJ-45 Twisted Pair Port Pinouts......................................................................................................................................... 94

7
Figures
Figure 1: AT-DC2552XS / L3 Front Panel ............................................................................................................................19
Figure 2: AT-DC2552XS / L3 Rear Panel View....................................................................................................................22
Figure 3: SFP+ Slot LEDs ....................................................................................................................................................24
Figure 4: QSFP+ LEDs.........................................................................................................................................................25
Figure 5: Power/Fault LED ...................................................................................................................................................26
Figure 6: NET MGMT LEDs..................................................................................................................................................27
Figure 7: FAN Status LEDs ..................................................................................................................................................28
Figure 8: AC Power LED ......................................................................................................................................................29
Figure 9: AT-PWR06 Power Supply Module ........................................................................................................................31
Figure 10: AT-FAN06 Fan Module........................................................................................................................................33
Figure 11: Stacking Ports .....................................................................................................................................................37
Figure 12: AT-DC2552XS / L3 Stacking Configuration Example..........................................................................................38
Figure 13: VCStack Resilient Stacked Topology Example ...................................................................................................39
Figure 14: Resiliency Link Connecting to Switch Ports Over the Resiliency Link VLAN ......................................................40
Figure 15: Resiliency Link Connecting to Switch Ports Over the Resiliency Link VLAN Using a Network Hub ...................41
Figure 16: Stacking Ports .....................................................................................................................................................42
Figure 17: Contents of the AT-DC2552XS / L3 Shipping Box ..............................................................................................52
Figure 18: Contents of the AT-PWR06 Power Supply Module Shipping Box.......................................................................53
Figure 19: Contents of the AT-FAN06 Fan Module Shipping Box........................................................................................54
Figure 20: Attaching the Rubber Feet ..................................................................................................................................56
Figure 21: Possible Bracket Locations .................................................................................................................................57
Figure 22: Attaching the Brackets to Switch.........................................................................................................................58
Figure 23: Mounting the Switch in an Equipment Rack........................................................................................................59
Figure 24: Loosen Power Supply Captive Screws................................................................................................................60
Figure 25: Insert AT-PWR06 Module Into Chassis...............................................................................................................61
Figure 26: Tighten AT-PWR06 Captive Screws ...................................................................................................................62
Figure 27: Loosen Screws on Fan Blank Cover ...................................................................................................................64
Figure 28: Insert AT-FAN06 Module Into Chassis ................................................................................................................64
Figure 29: Tighten AT-FAN06 Captive Screws.....................................................................................................................65
Figure 30: Removing the Dust Plug from an SFP+ Slot .......................................................................................................69
Figure 31: Handle on SFP Transceiver ................................................................................................................................69
Figure 32: Installing an SFP+ Transceiver ...........................................................................................................................70
Figure 33: Removing SFP+ Dust Cover ...............................................................................................................................70
Figure 34: Attaching a Fiber Optic Cable to an SFP+ Transceiver.......................................................................................71
Figure 35: Removing the Dust Plug from an SFP+ Slot .......................................................................................................71
Figure 36: Installing an SFP+ Direct Attach Cable ...............................................................................................................72
Figure 37: Removing QSFP+ Slot Dust Cover .....................................................................................................................74
Figure 38: Installing a QSFP+ Transceiver...........................................................................................................................74
Figure 39: Removing QSFP+ Dust Cover ............................................................................................................................75
Figure 40: Attaching a Fiber Optic Cable to a QSFP+ Transceiver......................................................................................75
Figure 41: Removing QSFP+ Slot Dust Cover .....................................................................................................................76
Figure 42: Installing a QSFP+ MTHTP Cable.......................................................................................................................76
Figure 43: Connecting the Management Cable to the Console Port ....................................................................................82
Figure 44: Connecting the Twisted Pair Cable into the NET MGMT port .............................................................................85
Figure 45: USB Console Connector and Port Pin Layout.....................................................................................................93
Figure 46: RJ-45 Connector and Port Pin Layout.................................................................................................................94

Figures
8

9
Tables
Table 1: Twisted Pair Cable Specifications for the NET MGMT Port ..................................................................................21
Table 2: SFP+ Slot LED ......................................................................................................................................................24
Table 3: QSFP+ LED ...........................................................................................................................................................25
Table 4: Power/Fault LED Description .................................................................................................................................26
Table 5: NET MGMT LED Descriptions ...............................................................................................................................27
Table 6: FAN Status LED Descriptions ................................................................................................................................28
Table 7: AC Power LED Description ....................................................................................................................................29
Table 8: Installation Procedures ..........................................................................................................................................46
Table 9: SFP+ Cables .........................................................................................................................................................68
Table 10: QSFP+ Cables .....................................................................................................................................................73
Table 11: Product Dimensions .............................................................................................................................................91
Table 12: Product Weights ..................................................................................................................................................91
Table 13: Environmental Specifications ...............................................................................................................................92
Table 14: AT-PWR06 Input Specifications ..........................................................................................................................92
Table 15: Product Certifications ...........................................................................................................................................92
Table 16: Console Pinouts ..................................................................................................................................................93
Table 17: Pin Signals for 10 and 100 Mbps .........................................................................................................................94
Table 18: Pin Signals - 1000 Mbps ......................................................................................................................................95

Tables
10

11
Preface
This guide contains instructions on how to install the AT-DC2552XS / L3
Enterprise Core Switch and the associated power supply and fan modules
on a desktop or in a 19 inch equipment rack.
This preface contains the following sections:
“Document Conventions” on page 12
“Contacting Allied Telesis” on page 13

Preface
12
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-DC2552XS / L3 Enterprise Core Switch Installation Guide
13
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
14

15
Chapter 1
Overview
This chapter contains the following sections:
“AT-DC2552XS / L3 Features” on page 16
“LEDs” on page 24
“Console Port” on page 30
“AT-PWR06 Power Supply Module” on page 31
“AT-FAN06 Fan Module” on page 33

Chapter 1: Overview
16
AT-DC2552XS / L3 Features
The AT-DC2552XS / L3 Enterprise Core Switch has a high-density
switching fabric (1280 Gbps) in a compact 1 RU chassis. The switch’s
functions and physical description are described in the following sections:
AT-DC2552XS/
L3 Functions
A list of the AT-DC2552XS / L3 switch’s functions is as follows:
Ports
You will find the following network and management ports on the
AT-DC2552XS / L3:
48 SPF+ slots
4 QSFP+ slots
1 Console port (USB)
1 NET MGMT port (RJ-45)
Note
Refer to Table 16 on page 93 for the Console connector pinout
functions.
System Capacity Here are the basic features of the AT-DC2552XS / L3 Enterprise Core
Switch:
System Capacity
2GB RAM size
128MB flash memory
9MB packet buffer
128K MAC addresses
4094 VLAN IDs (802.1Q)
1K MAC-based VLAN
512 ACL profiles with 256 ACL rules/profile
8 QoS queues per port
255 Layer 2 multicast groups
Maximum jumbo frames 12k bytes
32 Link Aggregation group (member 8)
Port Mirroring

AT-DC2552XS / L3 Enterprise Core Switch Installation Guide
17
Installation Options
The AT-DC2552XS / L3 Enterprise Core Switch is designed to be installed
in one of two ways:
On a desktop.
In a 19-inch equipment rack.
Power Supply/Fan Modules
The AT-DC2552XS / L3 must have two fan modules and at least one
power supply module installed. You may elect to install a second power
supply module for redundancy. The power supply and fan modules are:
AT-PWR06 power supply module
AT-FAN06 fan module
Note
The AT-DC2552XS / L3 must have two fan modules and at least one
power supply module installed before you power the unit on. You
may elect to install a second power supply module for redundancy.
Note
The AT-PWR06 power supply module and AT-FAN06 fan module
are sold separately from the AT-DC2552XS / L3 Enterprise Core
Switch. Contact your local Allied Telesis representative for more
information.
Optional SFP+ Transceivers
The following SFP+ transceivers and direct attach cable assemblies have
been approved by Allied Telesis and may be installed in the
AT-DC2552XS / L3 chassis:
Note
The SFP+ transceivers and direct attach cable assemblies are sold
separately from the AT-DC2552XS / L3 Enterprise Core Switch.
Contact your local Allied Telesis representative for more information.
AT-SP10SR (10GBASE-SR LC Ren (2))
AT-SP10LR (10GBASE-LR LC Ren (2))
AT-SP10TW1 (SFP + Direct Attach Cable (1m))
AT-SP10TW3 (SFP + Direct Attach Cable (3m))
AT-SP10TW7 (SFP + Direct Attach Cable (7m))

Chapter 1: Overview
18
Optional QSFP+ Transceivers
The following QSFP+ transceivers direct attach cable assemblies have
been approved by Allied Telesis and may be installed in the
AT-DC2552XS / L3 chassis:
Note
The QSFP+ transceivers and direct attach cable assemblies are
sold separately from the AT-DC2552XS / L3 Enterprise Core Switch.
Contact your local Allied Telesis representative for more information.
AT-QSFPSR (40GBASE-SR4 (MPO))
QSFP+ Direct Attach Cables
- AT-QSFP1CU (QSFP + Direct Attach Cable (1m))
- AT-QSFP3CU (QSFP + Direct Attach Cable (3m))
Fiber-Optic Cable for AT-QSFPSR
- ET3-MPO12-1 (1m)
- ET3-MPO12-5 (5m)
Management Software and Interfaces
Here are the management software and the management interfaces:
AlliedWare Plus Management Software
Command line interface
SNMP V1, V2 and V3
Note
Refer to the AT-DC2552XS / L3 Management Software Command
Line Interface User’s Guide for information concerning specific
commands.
Management Methods
Here are the methods for managing the switches:
Local management through the Console port
Telnet client on a network or NET MGMT port
Secure Shell with telnet client on a network (SSH) port
SNMPv1, v2c, and v3 on a network or NET MGMT port

AT-DC2552XS / L3 Enterprise Core Switch Installation Guide
19
AT-DC2552XS/
L3 Physical
Description
The AT-DC2552XS / L3 Enterprise Core Switch physical description is as
follows:
AT-DC2552XS / L3 Front Panel
The front panel of the AT-DC2552XS / L3 is shown in Figure 1.
Figure 1. AT-DC2552XS / L3 Front Panel
Exhaust Air Vents - Air is forced through the chassis by the fan
modules and power supply modules and exits through the exhaust
air vents on the top of the front panel.
Warning
Keep the exhaust air vents clear of any obstructions to insure proper
cooling of the switch components.
SFP+ Slots - There are 48 SPF+ slots (ports 1 - 48) on the front
panel. Each port supports communication speeds up to 10Gbps.
The switch supports a variety of 10G SFP+ transceivers and direct
attach cables.
The AT-DC2552XS / L3 Enterprise Core Switch only supports
SFP+ transceivers in this product. Refer to “Installing SFP+
Transceivers and Cables” on page 68 for installation instructions of
the SFP+ transceivers.
NET MGMT Port LEDs
NET MGMT Port
4 QSFP+ Slots
QSFP+ Slot LEDs
Console Port
Power/Fault LED
48 SFP+ Slots
SFP+ Slot LEDs
Exhaust Air Vents
[Top of Chassis]
(Ports 1 - 48) (Ports 49 - 64)
(ETH0)

Chapter 1: Overview
20
Note
Each SFP+ slot has a dust cover installed at the factory which
should be left in place until an SFP+ transceiver is installed.
SFP+ Slot LEDs - Each SFP+ slot has a corresponding LED which
displays the link and activity status of the port. See Figure 3 on
page 24 for the location of these LEDs and Table 2 on page 24 for
their functional description.
QSFP+ Slots - There are four QSFP+ slots which support
communication speeds up to 40 GB. These slots are numbered 49,
53, 57 and 61. Each slot may be configured as one 40 GB port or 4
X 10GB ports in the management software. See Figure 4 on page
25 for the location of these LEDs and Table 3 on page 25 for their
functional description. Refer to “Installing QSFP+ Transceivers and
Cables” on page 73 for installation instructions.
Note
Each QSFP+ slot has a dust cover installed at the factory which
should be left in place until a QSFP+ transceiver is installed.
Note
QSFP+ transceivers must be purchased separately. For more
information about the list of supported QSFP+ transceivers, refer to
“Optional SFP+ Transceivers” on page 17.
QSFP+ Slot LEDs - Each QSFP+ slot has a corresponding QSFP+
LED which displays the link and activity status of the QSFP + slots.
Refer to “QSFP+ Slot LEDs” on page 25 for the functional
description.
Power/Fault LED - The Status LED displays the overall status of
the chassis, power supply modules and fan modules. Refer to
“Power/Fault LED” on page 26 for the functional description.
Console Port - The console port is a standard RS-232 interface
using an USB interface. This port provides the capability to
manage the configuration and firmware of the switch locally
independent from the Ethernet network. Refer to “Connecting the
Console Port” on page 82 for more information.
Note
An RS-232 cable (female USB / D-Sub 9 pin) cable is included with
the AT-DC2552XS / L3 shipping container.
NET MGMT Port - This 10/100/1000BASE-T RJ-45 Ethernet port
provides the capability to manage the configuration and firmware
of the switch. You can obtain or forward information via the