Illustrations in this chapter depict the mounting of an unpopulated 8-slot chassis.

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

The Figure 1 display the dimensions and footprint of the switch clearance requirements.

The Figure 1 display the dimensions and footprint of the switch clearance requirements.

• Temperature and Ventilation: For proper ventilation, install the switch with ample airflow to the front and back of the switch. The temperature should not go below 0° or exceed 40°C.

   

  Important:

  To prevent the switch from overheating, do not operate it in an area where the ambient temperature exceeds 40°C (104°F).

   

  Pour empêcher l'interrupteur de surchauffe, ne pas utiliser il dans une zone où la température ambiante est supérieure à 40°C (104°F).

   

   

• Airflow Orientation: The fans direct air from the front panel to the rear panel. Orient the front panel toward the cool aisle.
• Rack Space Requirements: The Table 2 table shows the rack space requirements for each modular switch.

   

  Table 2. Rack Space Requirements

  Switch	Rack or Cabinet (standard 19" EIA)
  	2-Post	4-Post	Switch Height (RU)
  DCS-7804	No	Yes	10
  DCS-7808	No	Yes	16
  DCS-7812	No	Yes	23
  DCS-7816	No	Yes	32

   

   

  Note: The accessory kit provides the required mounting hardware for each switch.

   

   

• Power Requirements: Arista switches require a minimum number of operating AC or DC power supplies in all chassis and for each power domain of switches with multiple power domains. Refer to Cabling the Power Supplies for more details regarding your switch.

   

  Important:

  DC cables should be protected with circuit over-current protection devices and circuit disconnect means. To turn off a unit, power must be disconnected from ALL power cables.

   

  DC câbles doivent être protégés avec dispositifs de protection de surintensité circuit et moyens de déconnexion du circuit. Pour éteindre une unité, l'alimentation doit être débranchée de TOUS les câbles d'alimentation.

   

   

• Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and foreign objects are not drawn into the ventilation holes. Ensure 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 the input connectors from the AC power outlet.
  • DC power cables can reach the input connectors from the DC power distribution unit.

     

The DCS-7816 accessory kit includes bolts and lifting brackets (Figure 2) that must be attached to the top of the chassis with the bolts supplied for lifting the chassis from the pallet onto the transport lift. You can use any appropriate lifting mechanism/tool to unload the switch. A platform lift is recommended for the transportation and installation of the switch. The rack mounting cradle is shipped nested upside down over the top of the chassis for all switches (Figure 3). A protective film on the top and sides keeps the cradle from scratching the chassis during transport.

Upon receiving the switch, inspect the shipping boxes and record any external damage. If you suspect that part of the shipment is damaged, retain packing materials; the carrier may need to inspect them.

If the boxes were not damaged in transit, unpack them carefully. Do not discard any accessories that may have been 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 DCS-7800 Series Modular Switches purchase order. The Parts List provides a list of components included with the switch.

Refer to the Arista Networks document Safety Information and Translated Safety Warnings at https://www.arista.com/en/support/product-documentation.

The following table lists the specifications of Arista Data Center modular switches covered by this guide.

_{1. For non-redundant power feeds, 12 to 16 for redundant power feeds.}

_{2. For non-redundant power feeds, 16 to 24 for redundant power feeds.}

_{3. For non-redundant power feeds, TBD for redundant power feeds.}

_{4. For non-redundant power feeds, 24 to 48 for redundant power feeds.}

The following table lists power specifications of modular switch components.

_{¹ With no input power.}

_{^{Note 1} Includes typical power supply conversion inefficiency. Contact your local Sales Engineer for 7800 power calculator details.}

_{^{Note 2} Power numbers given as Typical/Maximum or Typical/Hot/Maximum where Hot is defined as 40°C Sea Level.}

_{^* Not N+N redundant power at worst case Temp/Elevation.}