Preparation
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).
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. Refer to Rear Panel to determine the airflow for your switch.
- Blue Handle: Air Inlet module. The following figure shows the airflow through the switch with air inlet modules:
Figure 1. Air Inlet Module 
- Red Handle: Air Exit module. The following figure shows the airflow through the switch with air exit modules:
Figure 2. Air Exit Module 
- Blue Handle: Air Inlet module. The following figure shows the airflow through the switch with air inlet modules:
- 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: Power requirements vary by switch and power supply model. Table 3 and Table 4 provide information regarding your specific system.
Two circuits provide redundancy protection. Cabling the Switch describes power cable requirements.
Figure 3. Airflow Direction Labels 
1 Power supply module 1 label 5 Fan module 4 9 Fan module 3 status LED 2 Fan module 1 6 Power supply module 2 label 10 Fan module 2 status LED 3 Fan module 2 7 Fan module handl 11 Fan module 1 status LED 4 Fan module 3 8 Fan module 4 status LED 12 PSU 1 status LED Note: Handle or label color indicates 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 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.