Preparation

The following topics are covered in this section:

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 with 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 the 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
Airflow Direction displays fan and power supply module locations on the device. Base the switch orientation on the airflow direction of the modules to ensure 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 incompatible 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.

Two circuits provide redundancy protection. Cabling the Switch describes power cable requirements.

Figure 1. Airflow Direction

1 Ground Lug 6 ESD
2 Blue Handles indicates forward airflow 7 Console (Serial) Port
3 Ethernet Management Port 8 USB Port
4 System Status LED 9 Power Supply 2 Status LED
5 Fan Status LED 10 Power Supply 1 Status LED
1 Fan Module 1 Handle 4 Fan Module 3 Status LED
2 Fan Module 3 Handle 5 Fan Module 1 Status LED
3 Ground    
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.

Tools and Parts Required for Installation

Each switch provides an accessory kit containing the parts 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.
Note: For DCS-7020SR-32C2, four-post rack kits are optional and sold separately.

Four-Post Rack (Tool-less)

No additional equipment is required.

Four-Post Rack (Conventional)

  • Screws or rack mounting nuts and bolts.
  • Screwdriver.

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.

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.

Overview

The following topics are covered in the section:

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.

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 you do not discard any accessories 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.

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).
  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 for installing 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 ensuring 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 accompany 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.

    Important:

    Ultimate disposal of this product should be handled in accordance with all national laws and regulations.

    L'élimination finale de ce produit doit être effectuée conformément à toutes les lois nationales etrèglements.

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: support@arista.com. 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 and view FAQs, Knowledge Base articles, Security Advisories, and Field Notices.

  • Phone: +1 866-476-0000 or +1 408-547-5502.
    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.

Specifications

Table 1. Switch Specifications (Dimensions and Weights)
Switch Size (W x H x D) 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 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% (non-condensing)
Table 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
Table 4. Switch Specifications (Power Input)
Power Source PSU Models Ratings
Power Input (DC Power) PWR-400-DC 24 VDC / 16 A, 48 VDC / 11 A, 60 VDC / 9 A
Note: All switches do not support all PSU models. 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 5. Switch Specifications (Power Draw)
Switch Power Draw (Typical / Maximum) Supported Power Supply
DCS-7020SR-32C2 160 W / 189 W PWR-400AC, PWR-400-DC

Quick Start Guide
7020SR-32C2 Series 1 RU (Gen 3)
Data Center Switches
Arista Networks

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