Cisco Catalyst 6816-X-LE, Руководство по установке оборудования

Страница: 34 / 100

• Equipment that is placed too closely together or that is inadequately ventilated may cause system
over-temperature conditions, leading to premature component failure.
• Poor equipment placement can make chassis panels inaccessible and difficult to maintain.
• The switch requires a dry, clean, well-ventilated, and air-conditioned environment.
• To ensure normal operation, maintain ambient airflow. If the airflow is blocked or restricted, or if the
intake air is too warm, an over-temperature condition may occur. The switch environmental monitor may
then shut down the system to protect the system components.
• Multiple switches can be rack mounted with little or no clearance above and below the chassis. However,
when mounting a switch in a rack with other equipment, or when placing it on the floor near other
equipment, ensure that the exhaust from other equipment does not blow into the air intake vent of the
switch chassis.
Temperature
Temperature extremes may cause a system to operate at reduced efficiency and cause a variety of problems,
including premature aging and failure of chips, and failure of mechanical devices. Extreme temperature
fluctuations may also cause chips to become loose in their sockets. Observe the following guidelines:
• Ensure that the chassis has adequate ventilation.
• Do not place the chassis within a closed-in wall unit or on top of cloth, which can act as insulation.
• Do not place the chassis where it will receive direct sunlight, particularly in the afternoon.
• Do not place the chassis next to a heat source of any kind, including heating vents.
• Adequate ventilation is particularly important at high altitudes. Make sure that all the slots and openings
on the system remain unobstructed, especially the fan vent on the chassis.
• Clean the installation site at regular intervals to avoid buildup of dust and debris, which may cause a
system to overheat.
• If the system has been exposed to abnormally cold temperatures, allow a 2-hour warm-up period to bring
it to normal operating temperature before turning it on.
Failure to observe these guidelines may damage the chassis' internal components.
Air Flow
The switch is designed to be installed in an environment where there is a sufficient volume of air available to
cool the baseboard and other boards in the chassis, any installed modules, and power supplies. Any constraints
placed on the free flow of air through the chassis or an elevated ambient air temperature can cause the switch
to overheat and shut down.
To maintain proper air circulation through the switch chassis, maintain a minimum 6-inch (15 cm) separation
between a wall and the chassis air intake or a wall and the chassis hot air exhaust. In situations where the
switch chassis is installed in racks which are placed in parallel rows, you should allow a minimum of 12 inches
(30.5 cm) between the air intake of one chassis and the hot air exhaust of another chassis. Failure to maintain
adequate spacing between chassis can cause the switch chassis that is drawing in the hot exhaust air to overheat
and fail.
Catalyst 6840-X Switch Series Hardware Installation Guide
22
Preparing for Installation
Temperature