Preparation

This section discusses the following topics:

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).

     

     

    Note: When applying labels to any switch, avoid covering ventilation perforations in the front and rear panels. Apply labels only to solid surface areas where there are no perforations. Use the pull-out tag on the front or rear of the switches, when provided, to apply custom labels. For switches that include a plastic tag with the accessory kit, use a single ventilation hole to clip the tag.

     

  • Airflow Orientation: The power supply module supports forward airflow, and so does the fan module. Figure 1 display fan and power supply module locations on the rear panel. 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.

    If the airflow direction is incompatible with the installation site, contact your sales representative.

     

  • 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 3 and Table 4 for information regarding your specific system.

     

    Two circuits provide redundancy protection. Cabling the Switch describes power cable requirements.
    Figure 1. Airflow Direction Labels

    1 Power Supply Module 1 4 Fan Module 2 7 Fan Module 5
    2 Management Ports 5 Fan Module 3 8 Ground
    3 Fan Module 1 6 Fan Module 4 9 Power Supply Module 2
    Note: Fan module handle color and power supply module label indicate 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.

       

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

     

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.
  • Select 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.

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-7050QX-32S 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-7050QX-32S.

 

 

After completing the instructions for your rack type, proceed to Cabling the Switch.

Note: The switch must be installed from the front of the rack for both the two-post and four-post installations.

 

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 include the following two-post mounting parts:

2 three-hole Mounting Brackets

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. 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 être bloquer tous les trois trous de la bride supérieure.

 

 

Figure 1 displays proper bracket mount configuration examples.Figure 4 displays improper bracket mount configuration examples.

Attaching Mounting Brackets to the Chassis (Two-Post)

The following figure displays the front bracket alignment for attaching the switch to a two-post rack.
Figure 1. Bracket Mount Examples for Two-Post Rack Mount

 

Note: Center mount is recommended, especially for heavier switches.

 

The following figure displays improper bracket mounts for two-post rack mounts.

Figure 2. Improper Bracket Mount Examples for Two-Post Rack Mount

 

The following procedure attaches the two-post rack mount brackets to the 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.

 

The following figure shows the correct bracket attachment for a front mount.

Figure 3. Attaching the Mounting Brackets to the Switch Chassis

1 Step 1 2 Step 2 3 Step 3
4 Bracket clip (attached) 5 Bracket clip (aligned)    

 

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).

Inserting the Switch into the Rack

This procedure attaches the switch to the rack (Figure 4).
  1. Lift the chassis into the rack. Position the flanges against the rack posts.
  2. Select mounting screws that fit your equipment rack.
  3. Attach the bracket flanges to the rack posts.
    Figure 4. Inserting the Switch into the Rack


     

    After completing the two-post rack mount, proceed to Cabling the Switch.

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, and then securing the switch to the front posts.

The installation kit provides the following four-post mounting parts:
  • 2 six-hole mounting brackets
  • 2 rail-rods
  • 2 rail-slides

     

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

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. 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 at least five of the six bracket holes.

 

Goupilles de fixation doivent être lock au moins cinq des trous du six support.

 

 

Figure 5 displays proper bracket mount configuration examples. Figure 6 displays an improper bracket mount configuration example.

Figure 5. Bracket Mount Examples for Four-Post Rack Mount

 

 

Figure 6. Improper Bracket Mount Example for Four-Post Rack Mount

1 Bracket not attached by at least 5 pins

Attaching Mounting Brackets to the Chassis (Four-post)

The following figure displays the front bracket alignment for mounting the switch into a four-post rack.
Figure 7. Attaching the Bracket to the Four-post Switch

1 Attaching brackets for front mount

 

This procedure attaches mounting brackets to the switch chassis as depicted in the above figure.

  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.

    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).

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 8). 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 on both sides of the assembled rails, then install the rails with bolts that fit the rack.

Figure 8. Attaching the Mounting Brackets to the Switch Chassis

1 Step 1 2 Step 2 3 Step 3
4 Bracket clip (attached) 5 Bracket clip (aligned)    

 

This procedure attaches the rails to a four-post rack:

  1. Slide a rail rod into a rail slide (Figure 9) until the rail clip makes an audible click.

    The rail clip prevents the rail extension beyond the maximum supported distance between the front and rear rack posts.

    Figure 9. Assembling the Rails

    1 Rail-slide 3 Rack plugs
    2 Rail-rod 4 Rail (assembled)

     

  2. Attach the rail to the right rear rack post by inserting rod-end rack plugs into post slots (Figure 10). 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.

  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 10).
  4. Repeat Steps 1 through 3 for the left posts. Ensure the rails are on the same horizontal level.
    Figure 10. Attaching the Rails

    1 Detail A 2 Detail B

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.
  1. Lift the switch into the rack and insert the mounting brackets into the slide rails.
    Figure 11. Inserting the Switch onto the Rails

     

  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.
  3. Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with the brackets (Figure 12).
    Figure 12. Attaching the Switch to the Rack Posts


     

    After completing the four-post rack mount, proceed to Cabling the Switch.

Overview

This section discusses the following topics:

Scope

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

  • DCS-7280CR2A-30
  • DCS-7280CR2K-30
  • DCS-7280CR2M-30
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. The 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 to install Class 1 laser transceivers that provides 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 60825, 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.

     

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

     

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:

Important:

There are 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-7280CR2A-30 48.3 x 4.4 x 67.1 cm

(19 x 1.75 x 26.4 inches)

 15.5 kg

(34.2 lbs.)
DCS-7280CR2K-30 48.3 x 4.4 x 67.1 cm

(19 x 1.75 x 26.4 inches)

 15.5 kg

(34.2 lbs.)
DCS-7280CR2M-30 48.3 x 4.4 x 67.1 cm

(19 x 1.75 x 26.4 inches)

 15.5 kg

(34.2 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 Supply Units)
Power Source PSU Models Ratings 1
Power Input (AC Power) PWR-1600AC 100 to 240 VAC, 12.9 to 9.5 A, 50/60 Hz
Power Input (DC Power) PWR-1611-DC -48 to -60 VDC, 39 A

1. AC PSUs could be rated for lower maximum power at lower line voltage.

2. The AC PSU fans will not be operational if the power cord is not connected.

 

 

 

Note:

A power supply unit could be used in multiple Arista switches.

 

For power consumed by a specific model or configuration, refer to the relevant power draw specification or contact your Arista representative.

 

 

 

Table 4. Switch Specifications (Power Draw)
Switch Power Draw (Typical / Maximum) Supported Power Supply
DCS-7280CR2A-30 563 W / 628 W PWR-1600AC

PWR-1611-DC
DCS-7280CR2K-30 563 W / 628 W PWR-1600AC

PWR-1611-DC
DCS-7280CR2M-30 1300 W / 1400 W PWR-1600AC

PWR-1611-DC