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 where there is ample airflow to the front and back of the switch. The ambient temperature should not go below 0°C 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 and PSUs determine the airflow direction through the switch. The color of the visible handles or labels indicate the airflow direction.
    Note: The figures shown use representative Arista switches to illustrate airflow directions.
    • Blue Handle: Air Inlet module. The following figure shows the airflow through the switch with air inlet modules:

       

    • Red Handle: Air Exit module. The following figure shows the airflow through the switch with air exit modules:
Rear Panel shows the fan and power supply module locations on the rear panel. Red handles indicate that they are air exit modules. 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.

Most Arista switches are available in configurations to support airflow in either '-R' (Rear-to-Front, port-side air exhaust) or '-F' (Front-to-Rear, port-side air intake). For proper function, ensure that the installation direction matches the airflow configuration of the switch. If the airflow direction through the switch is not compatible with the installation site, check the switch datasheet or with your Arista representative for applicable options.

  • Rack Space: Install the switch in a 19" rack or cabinet. The switches covered by this guide may be 1 RU or 2 RU in height. The accessory kit provides approved mounting brackets for the system. Four-post mounting is recommended for all systems. Where 2-post parts are supplied, they are intended for center-mounting the device.

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. Table 3 and Table 4 provide information regarding your specific system.

    For redundancy, power supplies should be connected to different circuits. Cabling the Switch describes power cable requirements.

    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 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

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.

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.