Arista 7000 Series User manual

Quick Start Guide
7000 Series 2 RU
Data Center Switches
Arista Networks
www.arista.com
PDOC-00039-15

ii
© Copyright 2022 Arista Networks, Inc. The information contained herein is subject to change without notice. Arista Networks
and the Arista logo are trademarks of Arista Networks, Inc in the United States and other countries. Other product or service
names may be trademarks or service marks of others.
Headquarters
5453 Great America Parkway
Santa Clara, CA 95054
USA
[phone]
www.arista.com
Support
[phone]
[phone]
[email protected]
Sales
[phone]
+ 1866 497-0000
[email protected]

Contents
Contents
Chapter 1: Overview................................................................................1
1.1 Scope......................................................................................................................................1
1.2 Receiving and Inspecting the Equipment...............................................................................1
1.3 Installation Process.................................................................................................................1
1.4 Safety Information...................................................................................................................2
1.5 Obtaining Technical Assistance..............................................................................................2
1.6 Specifications..........................................................................................................................3
Chapter 2: Preparation............................................................................7
2.1 Site Selection..........................................................................................................................7
2.2 Reconfiguring Air Flow........................................................................................................... 9
2.3 Tools and Parts Required for Installation............................................................................... 9
2.4 Electrostatic Discharge (ESD) Precautions..........................................................................10
Chapter 3: Rack Mounting the Switch................................................ 11
3.1 Two-Post Rack Mount...........................................................................................................11
3.1.1 Attaching Mounting Brackets to the Chassis.......................................................... 12
3.1.2 Inserting the Switch into the Rack..........................................................................12
3.2 Four-Post Rack Mount..........................................................................................................13
3.2.1 Extracting the Brackets and the Rails.................................................................... 14
3.2.2 Attaching Mounting Brackets to the Chassis.......................................................... 15
3.2.3 Expanding the Rails................................................................................................16
3.2.4 Assembling the Rails onto the Equipment Rack.....................................................17
3.2.5 Attaching the Switch to the Rack........................................................................... 17
Chapter 4: Cabling the Switch.............................................................19
4.1 Grounding the Switch........................................................................................................... 19
4.1.1 Models with Grounding Pads..................................................................................19
4.1.2 Models without Grounding Pads.............................................................................19
4.1.3 Grounding Adapter Assembly.................................................................................20
4.2 Connecting Power Cables.................................................................................................... 21
4.2.1 AC Power Supplies................................................................................................. 21
4.2.2 DC Power Supplies.................................................................................................22
4.3 Connecting Serial and Management Cables........................................................................24
Chapter 5: Configuring the Switch......................................................27
Appendix A: Status Indicators.............................................................29
A.1 Front Indicators.....................................................................................................................29
A.1.1 Switch Indicators.................................................................................................... 29
A.1.2 Port Indicators........................................................................................................ 30
A.2 Rear Status Indicators......................................................................................................... 31
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Appendix B: Parts List..........................................................................33
B.1 Rack Mount Parts.................................................................................................................33
B.1.1 Four-Post Rack Mount Parts.................................................................................. 33
B.1.2 Two-Post Rack Mount Parts................................................................................... 33
B.2 Cables...................................................................................................................................34
Appendix C: Front Panel...................................................................... 35
C.1 Port-Speed Groups.............................................................................................................. 35
C.2 Front Panels......................................................................................................................... 35
Appendix D: Rear Panel....................................................................... 45
Appendix E: Regulatory Model Numbers........................................... 47
Appendix F: Taiwan RoHS Information...............................................49
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Chapter 1
Overview
This guide is intended for properly trained service personnel and technicians who need to install
selected Arista Networks Data Center Switches.
The following topics are covered in this section:
•Scope
•Receiving and Inspecting the Equipment
•Installation Process
•Safety Information
•Obtaining Technical Assistance
•Specifications
1.1 Scope
The following Arista Networks Data Center Switches are supported by this guide:
DCS-7050SX-128 DCS-7250QX-64 DCS-7280QR-C72 DCS-7280CR3-96
DCS-7050TX-128 DCS-7260QX-64 DCS-7280CR-48 DCS-7280CR3K-96
DCS-7050SX2-128 DCS-7260CX-64 DCS-7280CR2-60 DCS-7050SX3-96YC8
DCS-7050TX2-128 DCS-7260CX3-64 DCS-7280CR2A-60
DCS-7170-64C DCS-7260CX3-64E DCS-7280CR2K-60
Important: Only qualified personnel should install, service, or replace this equipment.
Seul le personnel qualifié doit installer, service, ou remplacer cet équipement.
1.2 Receiving and Inspecting the Equipment
Upon receiving the switch, inspect the shipping boxes and record any external damage. Retain packing
materials if you suspect that part of the shipment is damaged; the carrier may need to inspect them.
If the boxes were not damaged in transit, unpack them carefully. Ensure that you do not discard any
accessories that may be packaged in the same box as the main unit.
Inspect the packing list and confirm that you received all listed items. Compare the packing list with
your purchase order. Parts List provides a list of components included with the switch.
1.3 Installation Process
The following tasks are required to install and use the switch:
1. Select and prepare the installation site (Site Selection).
2. Assemble the installation tools listed (Tools and Parts Required for Installation).
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3. Attach the mounting brackets and install the switch in an equipment rack (Rack Mounting the
Switch).
4. Connect the switch to the power source and network devices (Cabling the Switch).
5. Configure the switch (Configuring the Switch).
Important: Class 1 Laser Product: This product has provisions to install Class 1 laser
transceivers which provide optical coupling to the communication network. Once a Class
1 laser product is installed, the equipment is a Class 1 Laser Product. The customer is
responsible for selecting and installing the Class 1 laser transceiver and for insuring that
the Class 1 AEL (Allowable Emission Limit) per EN/IEC 60825, CSA E60825-1, and Code
of Federal Regulations 21 CFR 1040 is not exceeded after the laser transceiver have been
installed. Do not install laser products whose class rating is greater than 1. Refer to all
safety instructions that accompanied the transceiver prior to installation. Only Class 1 laser
devices, certified for use in the country of installation by the cognizant agency are to be
utilized in this product.
Appareil à laser de classe 1 Cet appareil comporte des dispositions permettant d'installer
des émetteurs-récepteurs fournissant un couplage optique au réseau de communication.
Une fois l'appareil à laser de classe 1 installé, l'équipement devient un appareil à laser de
classe 1. Le client est responsable du choix et de l'installation de l'émetteur-récepteur à
laser de classe 1 et il doit s'assurer que les limites d'émission admissibles pour la classe 1
régulées par les normes EN/IEC 60825 et CAN/CSA E60825-1 et par le Code of Federal
Regulations 21 CFR 1040 ne soient pas dépassées après l'installation de l'émetteur-
récepteur à laser. N'installez pas d'appareils à laser dont la classification est supérieure à 1.
Avant l'installation, lisez attentivement les instructions de sécurité fournies avec l'émetteur-
récepteur. Seuls les appareils à laser de classe 1 qui ont été certifiés par l'autorité agréée
pour une utilisation dans le pays d'installation peuvent être utilisés dans ce produit.
Important: Ultimate disposal of this product should be in accordance with all applicable
laws and regulations.
Élimination définitive de ce produit devrait être en conformité avec toutes les lois et
règlements applicables.
1.4 Safety Information
Refer to the Arista Networks document Safety Information and Translated Safety Warnings available
at: https://www.arista.com/en/support/product-documentation.
1.5 Obtaining Technical Assistance
Any customer, partner, reseller or distributor holding a valid Arista Service Contract can obtain
technical support in any of the following ways:
•Email: suppor[email protected]. This is the easiest way to create a new service request.
Include a detailed description of the problem and the output of “show tech-support”.
•Web: https://www.arista.com/en/support.
A support case may be created through the support portal on our website. You may also download
the most current software and documentation, as well as view FAQs, Knowledge Base articles,
Security Advisories, and Field Notices.
•Phone: [phone] or [phone].
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Overview
Important: No user serviceable parts inside. Refer all servicing to qualified service personnel.
Aucune pièce réparable par l'utilisateur à l'intérieur. Confiez toute réparation à un technicien
qualifié.
1.6 Specifications
The following table lists the specifications of Arista Data Center switches covered by this guide.
Table 1: Switch Specifications (Dimensions and Weights)
Switch Size (W x H x D) Weight
DCS-7050SX-128 48.3 x 8.9 x 45.9 cm (19 x 3.5 x 18.1 inches) 15.1 kg (33 lbs.)
DCS-7050TX-128 48.3 x 8.9 x 45.9 cm (19 x 3.5 x 18.1 inches) 15.6 kg (34 lbs.)
DCS-7050SX2-128 48.3 x 8.9 x 45.9 cm (19 x 3.5 x 18.1 inches) 15.1 kg (33 lbs.)
DCS-7050TX2-128 48.3 x 8.9 x 45.9 cm (19 x 3.5 x 18.1 inches) 15.6 kg (34 lbs.)
DCS-7250QX-64 48.3 x 8.9 x 55.3 cm (19 x 3.5 x 21.8 inches) 19.2 kg (42 lbs.)
DCS-7260QX-64 48.3 x 8.9 x 45.7 cm (19 x 3.5 x 18.0 inches) 16.1 kg (35.5 lbs.)
DCS-7260CX-64 48.3 x 8.9 x 45.7 cm (19 x 3.5 x 18.0 inches) 21.3 kg (47 lbs.)
DCS-7260CX3-64 48.3 x 8.9 x 45.4 cm (19 x 3.5 x 17.9 inches) 15.6 kg (34 lbs.)
DCS-7260CX3-64E 48.3 x 8.9 x 45.4 cm (19 x 3.5 x 17.9 inches) 15.6 kg (34 lbs.)
DCS-7280CR-48 48.3 x 8.9 x 56.3 cm (19 x 3.5 x 22.2 inches) 21.2 kg (47 lbs.)
DCS-7280CR2-60 48.3 x 8.9 x 64.0 cm (19 x 3.5 x 25.2 inches) 24.9 kg (54.8 lbs.)
DCS-7280CR2A-60 48.3 x 8.9 x 64.0 cm (19 x 3.5 x 25.2 inches) 24.9 kg (54.8 lbs.)
DCS-7280CR2K-60 48.3 x 8.9 x 64.0 cm (19 x 3.5 x 25.2 inches) 24.9 kg (54.8 lbs.)
DCS-7170-64C 48.3 x 8.9 x 45.4 cm (19 x 3.5 x 17.9 inches) 15.9 kg (35 lbs.)
DCS-7280QR-C72 48.3 x 8.9 x 56.3 cm (19 x 3.5 x 22.2 inches) 21.5 kg (47.3 lbs.)
DCS-7280CR3-96 48.3 x 8.9 x 75.3 cm (19 x 3.5 x 30.0 inches) 23.6 kg (52.0 lbs.)
DCS-7280CR3K-96 48.3 x 8.9 x 75.3 cm (19 x 3.5 x 30.0 inches) 23.6 kg (52.0 lbs.)
DCS-7050SX3-96YC8 48.3 x 8.9 x 50.2 cm (19 x 3.5 x 19.8 inches) 19.5 kg (42.9 lbs.)
Table 2: Switch Specifications (Operational and Storage)
Switch Operating
Temperature Storage Temperature Operating Altitude Relative Humidity
All 0° to 40°C (32° to
104°F)
-25° to 70°C (-13°
to 158°F)
0 to 3,000 meters
(0 to 10,000 feet)
5 to 90%
Table 3: Switch Specifications (Power Input)
Power Input (AC Power) Switch/PSU Ratings
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DCS-7050SX-128 /
PWR-500AC
100 - 240 VAC, 5.7-2.4 A,
50/60 Hz
DCS-7050SX-128 /
PWR-750AC
100 - 240 VAC, 5.7-2.4 A,
50/60 Hz
DCS-7050TX-128 /
PWR-745AC
100 - 240 VAC, 10-5 A, 50/60
Hz
DCS-7050SX2-128 /
PWR-500AC
100 - 240 VAC, 5.7-2.4 A,
50/60 Hz
DCS-7050TX2-128 /
PWR-745AC
100 - 240 VAC, 10-5 A, 50/60
Hz
DCS-7250QX-64 /
PWR-1100AC
200 - 240 VAC, 6.5 A, 50/60
Hz
DCS-7260QX-64 /
PWR-1100AC
200 - 240 VAC, 6.5 A, 50/60
Hz
DCS-7260CX-64 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7260CX3-64 /
PWR-745AC
100 - 240 VAC, 10-5 A, 50/60
Hz
DCS-7260CX3-64E /
PWR-745AC
100 - 240 VAC, 10-5 A, 50/60
Hz
DCS-7280CR-48 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7280CR2-60 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7280CR2A-60 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7280CR2K-60 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7170-64C / PWR-745AC 100 - 240 VAC, 10-5 A, 50/60
Hz
DCS-7280QR-C72 /
PWR-1900AC
200 - 240 VAC, 11.5 A, 50/60
Hz
DCS-7280CR3-96 /
PWR-2411-AC
200 - 240 VAC, 14.0 A, 50/60
Hz
DCS-7280CR3K-96 /
PWR-2411-AC
200 - 240 VAC, 14.0 A, 50/60
Hz
DCS-7050SX3-96YC8 /
PWR-1011-AC
100 - 120 / 200 - 240 VAC,
12.0 / 6.0A, 50/60 Hz
Power Input (DC Power) DCS-7050SX-128 /
PWR-500DC
-48 to 60 VDC, 15 A
DCS-7050TX-128 /
PWR-1900DC
-48 to 60 VDC, 32 A
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Overview
DCS-7250QX-64 /
PWR-1900DC
-48 to 60 VDC, 32 A
DCS-7260CX-64 /
PWR-1900DC
-48 to 60 VDC, 46 A
DCS-7260CX3-64 /
PWR-1900DC
-48 to 60 VDC, 32 A
DCS-7260CX3-64E /
PWR-1900DC
-48 to 60 VDC, 32 A
DCS-7280CR-48 /
PWR-1900DC
-48 to 60 VDC, 52 A
DCS-7280CR2-60 /
PWR-1900DC
-48 to 60 VDC, 52 A
DCS-7280CR2A-60 /
PWR-1900DC
-48 to 60 VDC, 52 A
DCS-7280CR2K-60 /
PWR-1900DC
-48 to 60 VDC, 52 A
DCS-7170-64C /
PWR-1900DC
-48 to 60 VDC, 32 A
DCS-7280QR-C72 /
PWR-1900DC
-48 to 60 VDC, 32 A
DCS-7280CR3-96 /
PWR-2411-DC
-48 to 60 VDC, 72 A
DCS-7280CR3K-96 /
PWR-2411-DC
-48 to 60 VDC, 72 A
DCS-7050SX3-96YC8 /
PWR-1011-DC
-48 to 60 VDC, 30 A
Table 4: Switch Specifications (Power Draw)
Switch Power Draw (Typical /
Maximum)
DCS-7050SX-128 235 W / 415 W
DCS-7050TX-128 570 W / 740 W
DCS-7050SX2-128 220 W / 395 W
DCS-7050TX2-128 430 W / 580 W
DCS-7250QX-64 622 W / 946 W
DCS-7260QX-64 315 W / 850 W
DCS-7260CX-64 1672 W / 2090 W
DCS-7260CX3-64 314 W / 616 W
DCS-7260CX3-64E 314 W / 616 W
DCS-7280CR-48 1363 W / 1710 W
DCS-7280CR2-60 1660 W / 1850 W
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DCS-7280CR2A-60 1760 W / 1950 W
DCS-7280CR2K-60 1760 W / 1950 W
DCS-7170-64C 335 W / 585 W
DCS-7280QR-C72 696 W / 1200 W
DCS-7280CR3-96 1100 W / 1800 W
DCS-7280CR3K-96 1100 W / 1800 W
DCS-7050SX3-96YC8 218 W / 453 W
6

Chapter 2
Preparation
The following topics are covered in this section:
•Site Selection
•Tools and Parts Required for Installation
•Electrostatic Discharge (ESD) Precautions
2.1 Site Selection
The following criteria should be considered when selecting a site to install the switch:
•Temperature and Ventilation: For proper ventilation, install the switch where there is ample airflow
to the front and back of the switch. The ambient temperature should not go below 0° or exceed
40°C.
Important: To prevent the switch from overheating, do not operate it in an area where the
ambient temperature exceeds 40°C (104°F).
Pour empêcher l'interrupteur de surchauffe, ne pas utiliser il dans une zone où la
température ambiante est supérieure à 40°C (104°F).
•Airflow Orientation: The fans and PSUs determine the airflow direction through the switch. The
color of the visible handles or labels indicate the airflow direction.
Note: The figures shown use representative Arista switches to illustrate airflow directions.
For some switches, label color indicates the airflow direction.
•Blue Handle: Air Inlet module. The following figure shows the airflow through the switch with air
inlet modules:
Figure 1: Air Inlet Module
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•Red Handle: Air Exit module. The following figure shows the airflow through the switch with air
exit modules:
Figure 2: Air Exit Module
Orient the switch such that the airflow through the switch is from the cooler to the hotter aisle. If the
airflow direction is not compatible with the installation site, reorient the fan modules to circulate air in
the opposite direction.
•Rack Space: Install the switch in a 19" rack or cabinet. The switch height is 2 RU. The accessory kit
provides mounting brackets for four-post racks. Contact your sales representative to obtain two-post
mounting brackets.
When mounting the switch in a partially filled rack, load the rack from bottom to top, with the
heaviest equipment at the bottom. Load the switch at the bottom if it is the only item in the rack.
•Power Requirements: Power requirements vary by switch and power supply model. Refer to Table
3: Switch Specifications (Power Input) for information regarding your specific system.
Two circuits provide redundancy protection. Grounding the Switch describes power cable
requirements.
Important: The power input plug-socket combination must be accessible at all times; it
provides the primary method of disconnecting power from the system.
La combinaison de la puissance-prise d'entrée doit être accessible en tout temps ; Il fournit
le principal moyen de coupure d'alimentation du système.
•Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and
foreign objects are not drawn into the ventilation holes. Verify these guidelines are met:
• Clearance areas to the front and rear panels allow for unrestricted cabling.
• All front and rear panel indicators can be easily read.
• Power cords can reach from the power outlet to the connector on the rear panel.
Important: All power connections must be removed to de-energize the unit.
Toutes les connexions d'alimentation doivent être enlevées pour hors tension l'appareil.
Important: This unit is intended for installation in restricted access areas.
Cet appareil est prévu pour une installation dans les zones d'accès restreintes.
8

Preparation
2.2 Reconfiguring Air Flow
Some switches allow configuration with either front-to-rear or rear-to-front airflow. To reconfigure a
system, de-energize the unit and replace all fans and power supplies with the desired orientation.
Mixing front-to-rear and rear-to-front components is not supported and will impact the cooling capacity
of the switch.
DCS-7260CX3 and DCS-7170-64 systems contain additional louvers behind the fan tray. These
louvers follow the same color coding as the fans and must be removed, rotated and replaced when
changing airflow orientation.
The following figures show the location of the louvers.
Note: All PSUs and fans must be of the same airflow orientation in a switch.
To replace the lover behind the fan:
1. Lift the tab up.
2. Rotate and remove the louver.
3. Rotate the louver so the desired color is on the outside.
4. Slide and seat the louver until it clicks into place.
2.3 Tools and Parts Required for Installation
The following tools and equipment are required to install the switch:
Two-Post Rack
• Screws or rack mounting nuts and bolts.
• Screwdriver
Four-Post Rack (Toolless)
No additional equipment required.
Accessory kit does not include screws for attaching the switch to the equipment rack. When installing
the switch into an equipment rack with unthreaded post holes, nuts are also required to secure the
switch to the rack posts.
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2.4 Electrostatic Discharge (ESD) Precautions
Observe these guidelines to avoid ESD damage when installing or servicing the switch.
• Assemble or disassemble equipment only in a static-free work area.
• Use a conductive work surface (such as an anti-static mat) to dissipate static charge.
• Wear a conductive wrist strap to dissipate static charge accumulation.
• Minimize handling of assemblies and components.
• Keep replacement parts in their original static-free packaging.
• Remove all plastic, foam, vinyl, paper, and other static-generating materials from the work area.
• Use tools that do not create ESD.
10

Chapter 3
Rack Mounting the Switch
The following topics are covered in this section:
•Two-Post Rack Mount
•Four-Post Rack Mount
Important: The rack mounting procedure is identical for all switches covered by this guide.
Illustrations in this chapter depict the mounting of a DCS-7050SX-128 switch.
Les procédure de montage du bâti est identique pour tous les commutateurs visés
par ce guide. Illustrations dans ce chapitre montrent le montage d'un interrupteur de
DCS-7050SX-128.
After completing the instructions for your rack type, proceed to Cabling the Switch.
3.1 Two-Post Rack Mount
To mount the switch onto a two-post rack, assemble the mounting brackets to the chassis, then attach
the brackets to the rack posts. Two-post accessory kits includes 2 three-hole mounting brackets.
Each chassis side has attachment pins that align with bracket holes; the number of pins (six or seven)
varies by switch model. Pin orientation is symmetric and equidistant, supporting bracket placement
where the flange is either flush with the front and rear panels, or not flush with the panels. Each bracket
hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.
Important: Attachment pins must engage all three upper bracket holes.
Goupilles de fixation doivent s’engager tous les trois trous de la bride supérieure.
11

Bracket Mount Examples for Two-Post Rack Mount displays proper bracket mount configuration
examples. Improper Bracket Mount Examples for Two-Post Rack Mount displays improper bracket
mount configuration examples.
Figure 3: Bracket Mount Examples for Two-Post Rack Mount
Figure 4: Improper Bracket Mount Examples for Two-Post Rack Mount
3.1.1 Attaching Mounting Brackets to the Chassis
This procedure attaches mounting brackets to the switch chassis
1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.
Figure 5: Attaching the Mounting Brackets to the Switch Chassis
To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip
with a flathead screwdriver and slide the bracket away from the front flange (opposite from the
installation direction).
3.1.2 Inserting the Switch into the Rack
This procedure attaches the switch to the rack.
12

Rack Mounting the Switch
1. Lift the chassis into the rack. Position the flanges against the rack posts.
Figure 6: Inserting the Switch into the Rack
2. Select mounting screws that fit your equipment rack.
3. Attach the bracket flanges to the rack posts.
After completing the two-post rack mount, proceed to Cabling the Switch.
3.2 Four-Post Rack Mount
The switch is mounted onto a four-post rack by assembling two rails onto the rear posts, sliding the
switch onto the rails, then securing the switch to the front posts.
The installation kit provides two bracket-rail assemblies. The following four-post mounting parts are
extracted from each assembly:
• Six-hole mounting bracket
• Rail
Each chassis side has attachment pins that align with bracket holes; the number of pins (six or seven)
varies by switch model. Pin orientation is symmetric and equidistant, supporting bracket placement
where the flange is either flush with the front and rear panels, or not flush with the panels. Each bracket
hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.
Important: Attachment pins must engage all six bracket holes.
Goupilles de fixation doivent s’engager tous les trous de support six.
13

Figure 7: Bracket Mount Examples for Four-Post Rack Mount displays proper bracket mount
configuration examples. Figure 8: Improper Bracket Mount Example for Four-Post Rack Mount
displays an improper bracket mount configuration examples.
Figure 7: Bracket Mount Examples for Four-Post Rack Mount
Figure 8: Improper Bracket Mount Example for Four-Post Rack Mount
Off-set mount is always an improper bracket mount configuration on switches that have six attachment
pins on each side.
3.2.1 Extracting the Brackets and the Rails
Figure 9: Bracket-Rail Assembly – Before and After Extraction displays a bracket-rail assembly and
the component pieces (bracket and rail) that are extracted from the assembly. Each assembly must
be separated into its component pieces before mounting the switch into a four-post rack. The two
assemblies supplied with the switch are identical.
Figure 9: Bracket-Rail Assembly – Before and After Extraction
This procedure separates a bracket-rail assembly into its component pieces.
1. Grip the rail with your right hand, as shown in Extracting the Bracket Rail Assembly-Left. Pull the
bracket flange away from the rail flange with your left hand until the bracket clip catches on the rail
(Extracting the Bracket Rail Assembly-Right).
14

Rack Mounting the Switch
If the bracket flange resists initially, verify the thumb screw on the bracket flange is not attached to
the rail flange.
Figure 10: Extracting the Bracket-Rail Assembly
1 Inset A 5 Bracket flange 9 Inset B (detail)
2 Rail (Grip here) 6 Thumb screw 10 Locking clip
3 Inset A (detail) 7 Inset B
4 Rail flange 8 Locking clip
2. While pressing the locking clip on the bracket (Extracting the Bracket Rail Assembly-Right), resume
pulling the bracket from the rail until the separation is complete.
3. Repeat the procedure for the other assembly.
3.2.2 Attaching Mounting Brackets to the Chassis
The Figure 11: Front Bracket Alignment displays the front bracket alignment for mounting the switch
into a four-post rack.
This procedure attaches mounting brackets to the switch chassis as depicted by Figure 12: Attaching
the Mounting Brackets to the Switch Chassis.
1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.
Figure 11: Front Bracket Alignment
15

To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip
with a flathead screwdriver and slide the bracket away from the front flange (opposite from the
installation direction).
Figure 12: Attaching the Mounting Brackets to the Switch Chassis
1 Bracket Clip
2 Bracket Clip
3.2.3 Expanding the Rails
The rail is a two-piece mechanism. The rail length is adjusted by sliding the rail-rod inside the rail-slide.
The rail clip prevent extension of the rail beyond the maximum supported distance between front and
rear rack posts. When the rail is contracted, the rail clip is closest to the slide end.
The rail is initially contracted and must be expanded to attach onto the rack. This procedure expands
the rails from their contracted state:
1. Grip the slide end with your left hand and the rod end with your right hand (Expanding the Rails-
Left).
2. Pull the ends apart until the rail-clip makes an audible click (Expanding the Rails-Right).
Figure 13: Expanding the Rails
1 Rail-slide end (grip with left hand) 3 Rail-rod end (grip with right hand) 5 Inset A (detail)
16