Arista 7020SR-32C2 User Manual

Quick Start Guide

7020SR-32C2 Series 1 RU (Gen 3)

Data Center Switches

Arista Networks

www.arista.com

DOC-00152-01

Headquarters

5453 Great America Parkway
Santa Clara, CA 95054
USA

[phone]

www.arista.com

© Copyright 2019 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.

ii Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Support

[phone]
[phone]

[e-mail]

Sales

[phone]
[phone]

[e-mail]

Table of 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.........................................................................................................5

2.1 Site Selection.......................................................................................................................................... 5

2.2 Tools and Parts Required for Installation................................................................................................ 6

2.3 Electrostatic Discharge (ESD) Precautions ............................................................................................ 7

Chapter 3 Rack Mounting the Switch ................................................................................9

3.1 Two-Post Rack Mount............................................................................................................................. 9

3.1.1 Attaching Mounting Brackets to the Chassis ............................................................................. 9

3.1.2 Inserting the Switch into the Rack............................................................................................ 10

3.2 Four-Post Rack Mount .......................................................................................................................... 11

3.2.1 Attaching Mounting Brackets to the Chassis ........................................................................... 11

3.2.2 Assembling the Rails onto the Equipment Rack ...................................................................... 11

3.2.3 Attaching the Switch to the Rack ............................................................................................. 13

Chapter 4 Cabling the Switch...........................................................................................15

4.1 Grounding the Switch ........................................................................................................................... 15

4.2 Connecting Power Cables .................................................................................................................... 15

4.2.1 AC Power Supplies .................................................................................................................. 16

4.3 Connecting Serial and Management Cables ........................................................................................ 17

Chapter 5 Configuring the Switch ...................................................................................19

Appendix A Status Indicator LEDs...................................................................................21

A.1 System-level Status Indicator LEDs...................................................................................................... 21

A.1.1 System Status Indicator LED ...................................................................................................21

A.1.2 Fan Status Indicator LED......................................................................................................... 21

A.1.3 Port Status Indicator LEDs....................................................................................................... 22

A.2 Component Status Indicators................................................................................................................ 22

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches iii

A.2.1 Fan Module Status LED........................................................................................................... 22

A.2.2 PSU Module Status LED.......................................................................................................... 23

Appendix B Parts List........................................................................................................25

B.1 Rack Mount Parts ................................................................................................................................. 25

B.1.1 Four-Post Rack Mount Parts....................................................................................................25

B.1.2 Two-Post Rack Mount Parts .................................................................................................... 26

B.2 Cables................................................................................................................................................... 26

Appendix C Front Panel ....................................................................................................27

Appendix D Rear Panel .....................................................................................................29

Appendix E Maintenance and Field Replacement ..........................................................31

E.1 Considerations...................................................................................................................................... 31

E.2 Power Supplies..................................................................................................................................... 31

E.2.1 Removing a Power Supply.......................................................................................................31

E.2.2 Installing a Power Supply......................................................................................................... 31

E.3 Fan Modules ......................................................................................................................................... 32

E.3.1 Removing a Fan Module.......................................................................................................... 32

E.3.2 Installing a Fan Module............................................................................................................ 32

Appendix F Regulatory Model Numbers .........................................................................33

Appendix G Taiwan RoHS Information ............................................................................35

iv Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 1

Overview

1.1 Scope

This guide is intended for properly trained service personnel and technicians who need to install the
following Arista Networks Data Center Switches:

DCS-7020SR-32C2

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. Appendix B provides a list of components included with the switch.

1.3 Installation Process

The following tasks are required to install and use the switch:

Step 1 Select and prepare the installation site (Section 2.1).
Step 2 Assemble the installation tools listed (Section 2.2).
Step 3 Attach the mounting brackets and install the switch in an equipment rack (Chapter 3).
Step 4 Connect the switch to the power source and network devices (Chapter 4).
Step 5 Configure the switch (Chapter 5).

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 1

Safety Information Chapter 1: Overview

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 (Appareil à Laser de Classe 1). 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.

Produit Laser de classe 1: Ce produit a des dispositions pour installer des émetteurs-récepteurs de
laser de classe 1 qui offre de couplage au réseau de communication optique.Une fois un produit laser
de classe 1 est installé, l'équipement est un produit Laser de classe 1 (Appareil à Laser de Classe 1).Le
client est responsable pour sélectionner et installer l'émetteur/récepteur de laser de classe 1 et pour
assurer que la classe 1 AEL (limite d'émission admissible) par EN/IEC 6-825, CSA E60825-1, et Code
des règlements fédéraux 21 CFR 1040 ne soit pas dépassée après avoir installé l'émetteur/récepteur
de laser. Ne pas installer des appareils à laser dont la cote de classe est supérieure à 1.Voir toutes les
consignes de sécurité qui ont accompagné l'émetteur-récepteur avant l'installation. Seuls appareils
laser de classe 1 certifiés pour une utilisation dans le pays d’installation par l’organisme compétent
doivent être utilisées dans ce produit.Ultimate disposal of this product should be in accordance with all
applicable laws and regulations.

Important! Ultimate disposal of this product should be handled in accordance with all national laws and

regulations.

Aucune pièce réparable par l'utilisateur à l'intérieur. Confiez toute réparation à un technicien qualifié.

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: [e-mail]. 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].

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.

2 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 1: Overview Specifications

1.6 Specifications

Table 1-1 Switch Specifications (Dimensions and Weights)

Switch Size (WxHxD) Weight

DCS-7020SR-32C2 48.3 x 4.4 x 34.7 cm (19 x 1.75 x 13.6 inches) 6.4 kg (14.4 lbs.)

Table 1-2 Switch Specifications (Operational and Storage)

Operating

Switch

All 0° to 40°C

Table 1-3 Switch Specifications (Power Input)

Power Source PSU Models Ratings

Power Input (AC Power) PWR-400AC 100 - 240 VAC, 4.5 A (max), 50/60 Hz

Temperature

(32° to 104°F)

Storage
Temperature

-25° to 70°C
(-13° to 158°F)

Operating
Altitude

0 to 3,000 meters
(0 to 10,000 feet)

Relative
Humidity

5to90%
(non-condensing)

Note All PSU models are not supported by all switches. Some switches described in this guide could use

power supplies that may no longer be available. Contact your local Arista representative for more
information.

Table 1-4 Switch Specifications (Power Draw)

Switch Power Draw (Typical / Maximum) Supported Power Supply

DCS-7020SR-32C2 160 W / 189 W PWR-400AC

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 3

Specifications Chapter 1: Overview

4 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 2

Preparation

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: Determine airflow direction of the fan modules on the rear panel and the
power supply modules on the front panel. Fan and power supply module handles indicate airflow
direction:

• Blue Handle: Air Inlet module.

• Red Handle: Air Exit module.

Figure 2-1 on page 6 displays fan and power supply module locations on the device. Base the

switch orientation on the airflow direction of the modules to assure the air inlet is always oriented
toward the cool aisle. For DCS-7020SR-32C2, ensure that the fan module and the power supply
module have opposite airflow orientations.

• Air Exit modules: orient the rear panel toward the hot aisle.

• Air Inlet modules: orient the rear panel toward the cool aisle.
If the airflow direction is not compatible with the installation site, contact your sales representative

to obtain modules that circulate air in the opposite direction.

• Rack Space: Install the switch in a 19" rack or cabinet. The switch height is 1 RU. The accessory
kit provides mounting brackets for two-post and four-post racks.

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 1-3 on page 3 and Table 1-4 on page 3 for information regarding your specific system.

Two circuits provide redundancy protection. Section 4.1 describes power cable requirements.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 5

Tools and Parts Required for Installation Chapter 2: Preparation

Figure 2-1: Airflow Direction

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.

2.2 Tools and Parts Required for Installation

Each switch provides an accessory kit that contains parts that are required to install the switch. In
addition to the accessory kit, the following tools and equipment are required to install the switch:

Two-Post Rack

• Screws or rack mounting nuts and bolts.

• Screwdriver

6 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 2: Preparation Electrostatic Discharge (ESD) Precautions

Note For DCS-7020SR-32C2, four-post rack kits are optional and sold separately.

Four-Post Rack (Tool-less)

No additional equipment required.

Four-Post Rack (Conventional)

• Screws or rack mounting nuts and bolts.

• Screwdriver

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.

2.3 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.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 7

Electrostatic Discharge (ESD) Precautions Chapter 2: Preparation

8 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 3

Rack Mounting the Switch

Important! The rack mounting procedure is identical for all switches covered by this guide. Illustrations in this

chapter depict the mounting of a DCS-7020SR-32C2 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-7020SR-32C2.

• Section 3.1 provides instructions for mounting all switches in a two-post rack.

• Section 3.2 provides instructions for mounting all switches in a four-post rack.

After completing the instructions for your rack type, proceed to Chapter 4.

3.1 Two-Post Rack Mount

To mount the switch onto a two-post rack, attach the mounting ears to the chassis, then attach the ears
to the rack posts. Two-post accessory kits include the following two-post mounting parts:

• 2x mounting ears

Important! Attachment pins must engage all three upper bracket holes.

Goupilles de fixation doivent être bloquer tous les trois trous de la bride supérieure..

3.1.1 Attaching Mounting Brackets to the Chassis

This procedure attaches mounting ears to the switch chassis (Figure 3-1).
Step 1 Attach the mounting ears to the chassis using screws.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 9

Two-Post Rack Mount Chapter 3: Rack Mounting the Switch

Figure 3-1: Attaching the Mounting Ears to the Switch Chassis

Note DCS-7020SR-32C2 supports front mount only.

3.1.2 Inserting the Switch into the Rack

This procedure attaches the switch to the rack (Figure 3-2).

Step 1 Lift the chassis into the rack. Position the mounting ears against the rack posts.

Note The mounting ears should be at the same height to ensure that the device is level.

Step 2 Select mounting screws that fit your equipment rack.
Step 3 Attach the mounting ears to the rack posts.

Figure 3-2: Inserting the Switch into the Rack

After completing the two-post rack mount, proceed to Chapter 4.

10 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 3: Rack Mounting the Switch Four-Post Rack Mount

3.2 Four-Post Rack Mount

Note For DCS-7020SR-32C2, four-post rack kits are optional and sold separately.

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 the following four-post mounting parts:

• 2x mounting brackets

• 2x rail-rods

• 2x rail-slides

The rail-rods and rail-slides assemble into two identical slide-rails.

3.2.1 Attaching Mounting Brackets to the Chassis

This procedure attaches mounting brackets to the switch chassis as depicted by Figure 3-3.

Step 1 Align the mounting brackets with the sides of the chassis.
Step 2 Use the screws to attach the brackets to the chassis.

Figure 3-3: Attaching Mounting Brackets to the Switch Chassis

3.2.2 Assembling the Rails onto the Equipment Rack

Rail-rods and rail-slides assemble into two identical rails. Each rail connects a front post to a rear post.
When the rails are installed, the switch slides on the rails into the rack. Each bracket includes a screw
that attaches the switch to the rail.

Each end of an assembled rail contains two rack plugs (Figure 3-4). The rails are installed into a rack
by inserting the plugs into rack slots. When installing rails into posts with threaded or rounded holes,
remove all plugs located on both sides of the assembled rails, then install the rails with bolts that fit the
rack.

This procedure attaches the rails to a four post rack:

Step 1 Slide a rail-rod into a rail-slide (Figure 3-4) until the rail clip makes an audible click.

Note The rail clip prevents the extension of the rail beyond the maximum supported distance between the

front and rear rack posts.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 11

Four-Post Rack Mount Chapter 3: Rack Mounting the Switch

Figure 3-4: Assembling the Rails

Step 2 Attach rail to the right rear rack post by inserting rod-end rack plugs into post slots

(Figure 3-5). The slide assembly must be inside the right posts, relative to the left rack posts.

If the rack plugs were previously removed, use bolts to attach the rail to the rack.

Step 3 Attach the slide end of the rail to the front post by extending the rail end past the post, then

contracting the rail while guiding the rack plugs into the post (Figure 3-5).

Step 4 Repeat step 1 through step 3 for the left posts. Ensure the rails are on the same horizontal

level.

Figure 3-5: Attaching the Rails

12 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 3: Rack Mounting the Switch Four-Post Rack Mount

3.2.3 Attaching the Switch to the Rack

After the rails are installed, the switch slides on the rails into the rack. Each bracket includes a thumb
screw that attaches the switch to the rail.

Step 1 Lift the switch into the rack and insert the mounting brackets into the slide rails (Figure 3-6).

Figure 3-6: Inserting the Switch onto the Rails

Step 2 Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are flush

with the rail flanges attached to the rack posts.

Step 3 Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with

the brackets (Figure 3-7).

Figure 3-7: Attaching the Switch to the Rack Posts

After completing the four-post rack mount, proceed to Chapter 4.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 13

Four-Post Rack Mount Chapter 3: Rack Mounting the Switch

14 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 4

Cabling the Switch

4.1 Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground. Figure 4-1
displays the location of the grounding lug on the front, left mounting ear for the DCS-7020SR-32C2.

Important! Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and

national installation requirements. Commercially available 6 AWG wire is recommended for
installations in the U.S

À la terre et de mise à la terre fils cosses (M4 x 0.7) ne sont pas fournis. Calibre des fils doit satisfaire
des exigences de l’installation locale et nationale. Disponible dans le commerce 6 fils AWG est
recommandé pour les installations aux États-Unis.

Figure 4-1: Earth Grounding Pad Sockets for DCS-7020SR-32C2

4.2 Connecting Power Cables

Important! Installation of this equipment must comply with local and national electrical codes. If necessary, consult

with the appropriate regulatory agencies and inspection authorities to ensure compliance.

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si
nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour
assurer la conformité.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 15

Connecting Power Cables Chapter 4: Cabling the Switch

The switch operates with two installed power supplies. At least one power supply must connect to a
power source. Two circuits provide redundancy protection. Figure 4-1 displays the location of the power
supplies on the front panel of the switch.

Important! Read all installation instructions before connecting the system to the power source.

Lire toutes les instructions d’installation avant de brancher le système à la source d’alimentation.

• Non-Redundant Configuration: Connect power to either of the two power supplies.

• Redundant Power Supply Configuration: Connect power to both power supplies.

• Power down the Switch: Remove all power cords and wires from the power supplies.

Important! This equipment must be grounded. Never defeat the ground conductor.

Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

Important! This unit requires overcurrent protection.

Cet appareil requiert une protection contre les surintensités.

4.2.1 AC Power Supplies

The following AC power supplies are supported.

• PWR-400AC

Figure 4-2 displays an AC power supply. It connects to a circuit that provides the required power, as

specified by Table 1-4 on page 3.

Figure 4-2: AC Power Supply (PWR-400AC)

The power supplies require power cables that comply with IEC-320 and have a C13 plug. The
accessory kit provides two IEC-320 C13 to C14 power cables.

Important! Apply ground connection to the switch first during installation and remove last when removing power.

Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la dernière
alimentation lors du débranchement.

16 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Chapter 4: Cabling the Switch Connecting Serial and Management Cables

4.3 Connecting Serial and Management Cables

The accessory kit includes the following cables:

• RJ-45 to DB-9 serial adapter cable.

• RJ-45 Ethernet cable.

Table 4-1 lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 4-1 RJ-45 to DB-9 Connections

RJ-45 DB-9 RJ-45 DB-9

RTS 1 8 CTS
DTR 2 6 DSR
TXD 3 2 RXD
GND 4 5 GND

Note RJ-45 to DB-9 connections: RJ-45 pin 1 (RTS) is connected to RJ-45 pin 8 (CTS); RJ-45 pin 2 (DTR)

and RJ-45 pin 7 (DSR) are not electrically connected to any signal.

Figure 4-3 displays the management, console, and USB ports on the front panel

Figure 4-3: Management Ports

GND 5 5 GND
RXD 6 3 TXD
DSR 7 4 DTR
CTS 8 7 RTS

Connect the ports as follows:

• Console (Serial) Port: Connect to a PC with the RJ-45 to DB-9 serial adapter cable.
The switch uses the following default settings:

• 9600 baud

• No flow control

• 1 stop bit

• No parity bits

• 8 data bits

• Ethernet Management Port: Connect to 10/100/1000 management network with RJ-45 Ethernet
cable.

• USB Port: The USB port may be used for software or configuration updates.

Note The DCS-7020SR-32C2 chassis has other ports labeled as Alarm, Clk in, Clk Out and ToD. These

ports are not supported. Do not connect any cables to these ports.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 17

Connecting Serial and Management Cables Chapter 4: Cabling the Switch

Caution Excessive bending can damage interface cables, especially optical cables.

Flexion excessive peut endommager les câbles d’interface, notamment des câbles optiques.

18 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Configuring the Switch

Arista switches ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the switch
without user intervention by downloading a startup configuration file or a boot script from a location
specified by a DHCP server. To manually configure a switch, ZTP is bypassed. The initial configuration
provides one username (admin) accessible only through the console port because it has no password.

When bypassing ZTP, initial switch access requires logging in as admin, with no password, through the
console port. Then you can configure an admin password and other password protected usernames.

This manual configuration procedure cancels ZTP mode, logs into the switch, assigns a password to

admin, assigns an IP address to the management port, and defines a default route to a network

gateway.

Chapter 5

Step 1 Provide power to the switch (Section 4.1).
Step 2 Connect the console port to a PC (Section 4.3).

As the switch boots without a startup-config file, it displays the following through the console:

The device is in Zero Touch Provisioning mode and is attempting to
download the startup-config from a remote system. The device will not
be fully functional until either a valid startup-config is downloaded
from a remote system or Zero Touch Provisioning is cancelled. To cancel
Zero Touch Provisioning, login as admin and type 'zerotouch cancel'
at the CLI.

localhost login:

Step 3 Log into the switch by typing admin at the login prompt.

localhost login:admin

Step 4 Cancel ZTP mode by typing zerotouch cancel. IMPORTANT: This step initiates a switch

reboot.

localhost>zerotouch cancel

Step 5 After the switch boots, log into the switch again by typing admin at the login prompt.

Arista EOS
localhost login:admin
Last login: Fri Mar 15 13:17:13 on console

Step 6 Enter global configuration mode.

localhost>enable
localhost#config

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 19

Chapter 5: Configuring the Switch

Step 7 Assign a password to the admin username with the username secret command.

localhost(config)#username admin secret pxq123

Step 8 Configure a default route to the network gateway.

localhost(config)#ip route 0.0.0.0/0 192.0.2.1

Step 9 Assign an IP address (192.0.2.8/24 in this example) to an Ethernet management port.

localhost(config)#interface management 1
localhost(config-if-Ma1/1)#ip address 192.0.2.8/24

Step 10 Save the configuration by typing write memory or copy running-config startup-config.

localhost#copy running-config startup-config

When the management port IP address is configured, use this command to access the switch from a
host, using the address configured in step 9:

ssh admin@192.0.2.8

Refer to the Arista Networks User Manual for complete switch configuration information.

20 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Status Indicator LEDs

A.1 System-level Status Indicator LEDs

Status indicator LEDs are located on the chassis and on some of the components like PSUs and Fan
modules. LEDs are located on the front (Appendix C) and the rear (Appendix D) of the switch.

A.1.1 System Status Indicator LED

Figure A-1 displays the system and the fan status LEDs.

Figure A-1: System Status and Fan Status Indicator

Appendix A

Table A-1 System Status Indicator LED States

LED Name LED State Device Status

System Status LED Blinking Green System is powering up.

Green Normal operations. Due to power supply and fan redundancy,

Blue The locater function is active.

Amber Two or more fans (any combination of fan modules or PSU

this LED will remain green if a single fan or power supply is
missing or in a failed state.

fans) are disconnected or malfunctioning. The switch will
automatically execute a “graceful shutdown” shortly.

A.1.2 Fan Status Indicator LED

Figure A-1 displays the fan status LED for the system.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 21

Component Status Indicators Appendix A: Status Indicator LEDs

Table A-2 Fan Status Indicator LED States

LED Name LED State Device Status

Fan Status LED Green All fan and power modules are operating normally.

Amber Single fan module is removed or malfunctioning. It is also

Red Two or more fans (any combination of fan modules or PSU

amber when a PSU is completely removed or has a stuck
fan rotor.

fans) are disconnected or malfunctioning. The switch will
automatically execute a “graceful shutdown” shortly.

Note Fan Module status LED is located on the fan module and displays the status of the corresponding fan

module.

A.1.3 Port Status Indicator LEDs

Port LEDs, located in the vicinity of their corresponding ports, provide link and operational status.

Figure A-2 displays a representative Port LED location on the DCS-7020SR-32C2 switch.

Figure A-2: Port Status LEDs

Table A-3 provides status conditions that correspond to port LED states. Port LED behavior for QSFP+

and SFP+ ports is consistent.

Table A-3 Port LED States (Front)

LED State Status

Off Port link is down.

Green Port link is up.

Yellow Port is software disabled.

Flashing Yellow Port failed diagnostics.

A.2 Component Status Indicators

A.2.1 Fan Module Status LED

Each fan and power supply module has an LED that reports the module status. Fan module status LED
is on the fan module (Figure A-3) and is different from the system-level fan status LED (Section A.1.2).

22 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Appendix A: Status Indicator LEDs Component Status Indicators

Figure A-3: Fan Module Status LED

Table A-4 provides status conditions that correspond to fan module status LED states.

Table A-4 Fan Module Status LED States

LED State Status

Off The fan module is not detected. If it is inserted, it may not be seated properly.

Green The fan is operating normally. This LED state is exclusive to its fan module, and

Red The fan has failed.

independent of the states of its neighboring fans and power supplies.

A.2.2 PSU Module Status LED

The AC power supply module status LEDs are on the power supply modules (Figure A-4).

Figure A-4: AC Power Supply Status LED

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 23

Component Status Indicators Appendix A: Status Indicator LEDs

Table A-5 provides status conditions that correspond to the AC power supply status LED states.

Table A-5 AC Power Supply Status LED States

Power Supply State PWR-400AC

Input power present
Normal operation

Input power present
Power Supply fault

No Input power Supply
installed in chassis

Input power present Supply
not installed in chassis

Green

Yellow

Blinking Yellow

Blinking Green

Note You can narrow down the error condition by logging in to the switch to view the specific device state.

Refer to the Arista User Manual’s Switch Environment Control chapter, under the topic Viewing
Environment Status, for further information on the show environment commands.

24 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Appendix B

Parts List

Each switch provides an accessory kit that contains parts that are required to install the switch. This
appendix lists the installation parts contained in the switch accessory kit.

Note The accessory kit is included in a bag. For DCS-7020SR-32C2, four-post rack kit is optional and sold

separately.

B.1 Rack Mount Parts

B.1.1 Four-Post Rack Mount Parts

Figure B-1: Four-Post Rack Mount Parts

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 25

Cables Appendix B: Parts List

B.1.2 Two-Post Rack Mount Parts

Figure B-2: Two-Post Rack Mount Parts for DCS-7020SR-32C2

B.2 Cables

Quantity Description

2 Power cables: IEC-320/C13-C14, 13 A, 250 V

1 RJ-45 Patch Panel Cable

1 RJ-45 to DB9 Adapter Cable

Warning All provided power cables are for use only with Arista products.

26 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Front Panel

This appendix displays the front panel of all switches covered by this guide.

Figure C-1: DCS-7020SR-32C2

Appendix C

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 27

Appendix C: Front Panel

28 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Rear Panel

All switches covered by this guide use the rear panel shown below.

Figure D-1: DCS-7020SR-32C2

Appendix D

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 29

Appendix D: Rear Panel

30 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Appendix E

Maintenance and Field Replacement

E.1 Considerations

• All fans and power supplies are hot swappable.

• The switch can be running while a power supply is being installed or removed, but the power supply
being replaced must not be connected to a power source.

• All slots must be filled or covered with a blank for operation (even though power supply or fans may
not be functional).

• Replacement parts should be the same or compatible with those being replaced.

• Before you begin, refer to the Arista Networks document Safety Information and Translated Safety
Warnings available at: https://www.arista.com/en/support/product-documentation.

Note Refer to the front (Appendix C) and rear (Appendix D) panel illustrations of your device to locate the

appropriate LED, the release lever or handle, and the handle for the power supply and fan modules.

E.2 Power Supplies

The following steps are required when removing power supplies from a switch.

E.2.1 Removing a Power Supply

Step 1 Ground yourself with an ESD wrist strap.
Step 2 Power down the power supply to be removed by disconnecting the AC power cable.
Step 3 Push the power supply release lever and remove the power supply.

E.2.2 Installing a Power Supply

You must make space for installing the power supply by removing an existing one (Section E.2.1).

Step 1 Remove the replacement power supply from its packaging.
Step 2 Slide the new power supply into the empty slot.
Step 3 Slide the new power supply into the switch until the power supply is fully seated and the

release lever snaps into place.

Step 4 Connect the power cord to the power supply.

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 31

Fan Modules Appendix E: Maintenance and Field Replacement

Step 5 Verify the LED(s) on the power supply.

Note The Power Supply status LED should be a steady green for normal operation.

Step 6 Verify the new power supply operation by issuing the show environment power command.

switch#show environment power

The output of the command will list the power supplies in operation and should include the one you
replaced.

E.3 Fan Modules

Note Hot swap fans within 30 seconds to prevent the switch from overheating. Ensure that the module you

are replacing matches those already installed in the switch.

E.3.1 Removing a Fan Module

The following steps are required when removing or replacing fans from a switch.

Step 1 Ground yourself with an ESD wrist strap.
Step 2 Push the fan module release lever and slide the fan module out of the switch.

E.3.2 Installing a Fan Module

You must make space for installing the fan module by removing an existing one (Section E.3.1).

Step 1 Remove the replacement fan from its packaging.
Step 2 Slide the new fan module into the switch until the module is fully seated and the release lever

snaps into place.

Step 3 Verify that the fan module is working normally.

Note The fan module status LED should be a steady green for normal operation.

32 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Regulatory Model Numbers

This appendix lists the regulatory model numbers (RMNs), where applicable, for the product models
for the switches described in this document.

Table F-1 Regulatory Model Numbers and Product Numbers

Regulatory Model Number (RMN) Product Number(s)

AN1723 DCS-7020SR-32C2

Appendix F

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 33

Appendix F: Regulatory Model Numbers

34 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches

Taiwan RoHS Information

This appendix provides Taiwan RoHS information for switches covered by this guide.
For Taiwan BSMI RoHS Table, go to https://www.arista.com/assets/data/pdf/AristaBSMIRoHS.pdf.

Appendix G

Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches 35

Appendix G: Taiwan RoHS Information

36 Quick Start Guide: 7020SR-32C2 Series 1 RU-Gen 3 Data Center Switches