Arista 7000 Series User manual

Quick Start Guide
7000 Series 1RU (Gen1)
Data Center Switches
DCS-7124SX
DCS-7048T-A
DCS-7050S-64
Arista Networks
www.arista.com

ii Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
© Copyright 2016 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.
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Santa Clara, CA 95054
USA
408 547-5500
www.arista.com
Support
408 547-5502
866 476-0000
[email protected]
Sales
408 547-5501
866 497-0000
[email protected]

Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches iii
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 Specifications........................................................................................................................................... 2
1.5 Obtaining Technical Assistance............................................................................................................... 2
Chapter: 2 Preparation..........................................................................................................3
2.1 Site Selection........................................................................................................................................... 3
2.2 Tools Required for Installation ................................................................................................................. 4
2.3 Electrostatic Discharge (ESD) Precautions ............................................................................................. 4
Chapter: 3 Mounting the Switch ..........................................................................................5
3.1 Two-Post Rack Mount.............................................................................................................................. 6
3.1.1 Attaching Mounting Brackets to the Chassis .............................................................................. 7
3.1.2 Inserting the Switch into the Rack............................................................................................... 7
3.2 Four-Post Rack Mount............................................................................................................................. 8
3.2.1 Attaching Mounting Brackets to the Chassis .............................................................................. 9
3.2.2 Assembling the Rails onto the Equipment Rack......................................................................... 9
3.2.3 Attaching the Switch to the Rack .............................................................................................. 10
Chapter: 4 Cabling the Switch ...........................................................................................13
4.1 Connecting Power Cables ..................................................................................................................... 13
4.2 Connecting Serial and Management Cables ......................................................................................... 14
Chapter: 5 Configuring the Switch ....................................................................................15
Appendix: A Status Indicators .......................................................................................... 17
A.1 Front Indicators...................................................................................................................................... 17
A.1.1 Switch Indicators....................................................................................................................... 17
A.1.2 Port Indicators........................................................................................................................... 18
A.2 Rear Status Indicators ........................................................................................................................... 19
Appendix: B Important Safety Instructions...................................................................... 21
Appendix: C Parts List ....................................................................................................... 25

iv Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
C.1 Rack Mount Parts .................................................................................................................................. 25
C.1.1 Two-Post Rack Mount............................................................................................................... 25
C.1.2 Four-Post Rack Mount.............................................................................................................. 26
C.2 Cables.................................................................................................................................................... 26
Appendix: D Front Panel.................................................................................................... 27
Appendix: E Rear Panel ..................................................................................................... 29

Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 1
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-7048T-A
• DCS-7124SX
• DCS-7050S-64
Important! Only qualified personnel should install, service, or replace this equipment.
1.2 Receiving and Inspecting the Equipment
Upon receiving the switch, inspect the shipping boxes and record any external damage. Retain the
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 C 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 as described in Section 2.1.
Step 2 Assemble the installation tools listed in Section 2.2.
Step 3 Attach the mounting brackets and install the switch in an equipment rack as described in
Chapter 3.
Step 4 Connect the switch to the power source and network devices as described in Chapter 4.
Step 5 Configure the switch as described in Chapter 5.

2 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Specifications Chapter 1: Overview
1.4 Specifications
Table 1-1 lists the specifications of Arista Data Center switches covered by this guide.
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 6-825, 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.
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: [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: www.aristanetworks.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 408-547-5502.
Important! No user serviceable parts inside. Refer all servicing to qualified service personnel.
Important! Ultimate disposal of this product should be handled in accordance with all applicable laws and
regulations.
Table 1-1 Switch Specifications
Height 44 mm (1.75 inches)–1RU
Width 445 mm (19 inches)
Depth 432 mm (17 inches)
Weight 7.71 kg (17 pounds)
Power Input 100-240 VAC, 4-8 A, 50-60 Hz
Operating Temperature 0° – 40° C (32° – 104° F)
Operating Altitude 0 – 3000 meters (0 – 10,000 feet)
Output Power (Maximum) 460 W
Power Draw: DCS-7048T-A (Typical / Maximum) 280 W / 390 W
Power Draw: DCS-7050S-64 (Typical / Maximum) 125 W / 210 W
Power Draw: DCS-7124SX (Typical / Maximum) 120 W / 210 W

Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 3
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).
•Airflow Orientation: Determine the airflow direction of the four fan modules and two power supply
modules on the rear panel. Figure 2-1 on page 4 indicates the location of the airflow direction label
on the power supply modules. The fan module airflow direction label is located on the left side of
the handle. The fan and power supply module handles also indicate the module airflow direction:
•Blue Handle: Air Inlet module.
•Red Handle: Air Exit module.
Verify that each module has the same airflow direction. Base the switch orientation on the airflow
direction of the modules to assure the air inlet is always oriented toward the cool aisle:
•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: The switch requires one 100-240 VAC, 50 or 60 Hz, 5.29 A circuit. Two
circuits provide redundancy protection. The switch uses power cables that comply with IEC-320
and have a C13 plug. The accessory kit provides two IEC-320 C13 to C14 power cables (two
meters).

4 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Tools Required for Installation Chapter 2: Preparation
Figure 2-1: Airflow Direction Labels
Important! The power input plug-socket combination must be accessible at all times; it provides the primary
method of disconnecting power from the system.
•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.
• AC power cords can reach from the AC power outlet to the connector on the rear panel.
Important! All power connections must be removed to de-energize the unit.
2.2 Tools Required for Installation
The following tools and equipment are required to install the switch:
• Phillips #1 screwdriver.
• Phillips #3 screwdriver.
• Four screws (two-post rack mount) that fit the equipment rack.
• Eight screws (four-post rack mount) that fit the equipment rack.
The 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 antistatic 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: 7000 Series 1RU (Gen1) Data Center Switches 5
Chapter 3
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-7124SX switch.
The accessory kit provides components for installing the switch in two-post and four-post racks.
•Section 3.1 provides instructions for mounting the switch in a two-post rack.
•Section 3.2 provides instructions for mounting the switch in a four-post rack.
Both options require the attachment of mounting brackets to the switch chassis. Each chassis side
contains six pairs of holes that align with bracket holes. Bracket hole orientation is symmetric, allowing
bracket placements where the flange is flush with the front or rear switch panel (Figure 3-1).
Figure 3-1: Chassis and Mounting Bracket Alignment for Front and Rear Rack Mounts
Bracket holes are horizontally equidistant, allowing bracket placements where the flange is not flush
with either panel (Figure 3-2 on page 6). This placement supports a center-rack mount.

6 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Two-Post Rack Mount Chapter 3: Mounting the Switch
Figure 3-2: Chassis and Mounting Bracket Alignment for Center Rack Mount
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, assemble the mounting brackets to the chassis, then attach
the brackets to the rack posts. The accessory kit includes the following two-post mounting parts:
• 2 mounting brackets
• 12 M4x5 flat head Phillips screws
Refer to Figure 3-1 on page 5 and Figure 3-2 for a description of the mounting brackets.
The switch supports any mounting position into a two-post rack that meets the following conditions:
• The bracket flanges do not extend beyond the switch chassis.
• Three sets of screws attach each mounting bracket to the chassis.
Figure 3-3 displays proper bracket mount configuration examples. Figure 3-4 on page 7 displays
improper bracket mount configuration examples.
Figure 3-3: Bracket Mount Examples for Two-Post Rack Mount

Chapter 3: Mounting the Switch Two-Post Rack Mount
Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 7
Figure 3-4: Improper Bracket Mount Examples for Two-Post Rack Mount
3.1.1 Attaching Mounting Brackets to the Chassis
To attach mounting brackets to the switch chassis, perform this procedure:
Step 1 Align the mounting brackets with the chassis to obtain the desired mounting position.
Step 2 Attach the brackets with six M4x5 flat head Phillips screws per bracket, using a #1 Phillips
screwdriver.
Space the screws evenly, separating them with the widest possible distance. Figure 3-5
displays screw placement for the front and center mount positions.
Figure 3-5: Attaching the Mounting Brackets to the Switch Chassis
3.1.2 Inserting the Switch into the Rack
Step 1 Lift the chassis into the rack. Position the flanges against the rack posts.
Figure 3-6 on page 8 displays the front-mount switch installation.
Step 2 Select mounting screws that fit your equipment rack.
Step 3 Attach the bracket flanges to the rack posts.

8 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Four-Post Rack Mount Chapter 3: Mounting the Switch
Figure 3-6: Inserting the Switch into the Rack
After completing the two-post rack mount, proceed to Chapter 4.
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 post.
The installation kit provides the following four-post mounting parts:
• 2 mounting brackets
• 2 rails
• 12 M4x5 flat head Phillips screws
Refer to Figure 3-1 on page 5 and Figure 3-2 on page 6 for a description of the mounting brackets.
The switch supports any mounting position where at least three sets of screws attach each mounting
bracket to the switch chassis.
Figure 3-7 displays proper bracket mount configuration examples. Figure 3-8 on page 9 displays an
improper bracket mount configuration example.
Figure 3-7: Bracket Mount Examples for Four-Post Rack Mount

Chapter 3: Mounting the Switch Four-Post Rack Mount
Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 9
Figure 3-8: Improper Bracket Mount Example for Four-Post Rack Mount
3.2.1 Attaching Mounting Brackets to the Chassis
To attach mounting brackets to the switch chassis, perform this procedure:
Step 1 Align the mounting brackets with the chassis to obtain the desired mounting position.
Step 2 Attach the brackets with six M4x5 flat head Phillips screws per bracket, using a #1 Phillips
screwdriver.
Space the screws evenly, separating them with the widest possible distance. Figure 3-9
displays screw placement for the front mount and center mount positions.
Figure 3-9: Attaching the Mounting Brackets to the Switch Chassis
3.2.2 Assembling the Rails onto the Equipment Rack
The rails attach to the rear rack posts to support the switch. Before attaching the rails to the rack posts,
verify that, when the switch is mounted, the distance between the bracket flanges and rail flanges does
not exceed 30 inches, as shown in Figure 3-10 on page 10.

10 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Four-Post Rack Mount Chapter 3: Mounting the Switch
Figure 3-10: Maximum Bracket-Rail Span
To attach the rails to the rear rack post, perform this procedure:
Step 1 Select mounting screws that fit your equipment rack. Each rail requires two screws.
Step 2 Attach the rails to the rear rack posts, as shown in Figure 3-11.
Figure 3-11: Attaching the Rails, as viewed from Rear of Rack
3.2.3 Attaching the Switch to the Rack
Step 1 Lift the switch into the rack and insert the mounting brackets onto the rails.
Step 2 Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are
positioned on the rail posts (Figure 3-12 on page 11).
Step 3 Select mounting screws that fit the equipment rack. Each chassis side requires two screws.
Step 4 Verify the distance between the mounting bracket flanges and rail flanges does not exceed
30 inches (see Figure 3-10 on page 10).
Step 5 Attach the bracket flanges to the rack posts (Figure 3-13 on page 11).

Chapter 3: Mounting the Switch Four-Post Rack Mount
Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 11
Figure 3-12: Inserting the Switch onto the Rails
Figure 3-13: Attaching the Switch to the Rack Posts
After completing the four-post rack mount, proceed to Chapter 4.

12 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Four-Post Rack Mount Chapter 3: Mounting the Switch

Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 13
Chapter 4
Cabling the Switch
4.1 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.
The switch operates with two installed power supplies. At least one power supply must connect to a
circuit that provides 100-240 VAC, 50 or 60 Hz, and 5.29 A. Two circuits provide redundancy protection.
The switch uses power cables that comply with IEC-320 and have a C13 plug. The accessory kit
provides two IEC-320 C13 to C14 power cables, each two meters long.
Figure 4-1 displays the power socket in the power supply modules that are located on the rear panel.
Appendix E displays the location of the power supplies on the panel.
Figure 4-1: Power Supply Socket
Important! Read all installation instructions before connecting the system to the power source.
•Non-Redundant Configuration: Connect a power cord to either of the two power supply inputs.
•Redundant Power Supply Configuration: Connect power cords to both power supply inputs.
•Power down the Switch: Remove all power cords from the power supply inputs.
Important! This equipment must be grounded. Never defeat the ground conductor.

14 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Connecting Serial and Management Cables Chapter 4: Cabling the Switch
Important! This unit requires overcurrent protection.
4.2 Connecting Serial and Management Cables
The accessory kit includes the following cables:
• RJ-45 to DB-9 serial adapter cable.
• RJ-45 Ethernet cable.
The front panel contains the console, management, and USB ports. Figure 4-2 displays the ports on
the 7124SX switch. Appendix D displays the front panel of all switches covered by this guide.
Use the provided cables to connect the front panel ports:
•Console (Serial) Port: Use the RJ-45 to DB-9 serial adapter cable to connect the console (serial)
port to a PC. The switch uses the following default settings:
• 9600 baud
• No flow control
• 1 stop bit
• No parity bits
• 8 data bits
•Ethernet Management Port: Use the RJ-45 Ethernet cable to connect the Ethernet management
port to a 10/100/1000 management network.
•USB Port: The USB port may be used for software or configuration updates.
Figure 4-2: Front Panel Ports
Caution Excessive bending can damage interface cables, especially optical cables.

Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches 15
Chapter 5
Configuring the Switch
Arista fixed configuration switches ship from the factory in Zero Touch Provisioning (ZTP) mode, which
configures a switch without user intervention by downloading a startup configuration file or a boot script
from a location specified by a DHCP server.
If you are not using ZTP, the initial configuration provides one username, admin, that is not assigned a
password. When using any username without a password, you can only log into the switch through the
console port. After assigning a password to the admin username, you can log into the switch through
any port.
This procedure performs the following initial configuration tasks:
• cancels ZTP mode.
• assigns a password to the admin username.
• assigns an IP address to the Ethernet management port.
• defines a default route to a network gateway.
Step 1 Provide power to the switch, as described in Section 4.1
Step 2 Connect the switch to a PC with a RJ-45 serial adapter cable, as described in Section 4.2.
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 at the localhost prompt.
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 Nov 12 13:17:13 on console
Step 6 Enter privileged EXEC mode by typing enable.
localhost>enable

16 Quick Start Guide: 7000 Series 1RU (Gen1) Data Center Switches
Chapter 5: Configuring the Switch
Step 7 Enter global configuration mode by typing configure terminal (or config).
localhost#config
Step 8 Assign a password to the admin username with the username secret command.
localhost(config)#username admin secret pxq123
Step 9 Configure a default route to the network gateway.
localhost(config)#ip route 0.0.0.0/0 192.0.2.1
Step 10 Enter interface configuration mode by typing interface and the name of the management port.
localhost(config)#interface management 1
Step 11 Assign an IP address to the port by typing ip address, followed by the desired address.
localhost(config-if-Ma1)#ip address 192.0.2.8/24
This command assigns the ip address 192.0.2.8 to the management port.
Step 12 Exit by typing end at the interface configuration and global configuration prompts.
localhost(config-if-Ma1)#end
localhost(config)#end
Step 13 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 11:
ssh [email protected]
Refer to the Arista Networks User Manual for complete switch configuration information.