Cisco Catalyst 9400 Series, Руководство по установке оборудования

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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 system is operating in an environment that is—
• 27 to 109 °F ( -5 to +45 °C) up to 6000 feet (1800m)
• 27 to 104 °F (-5 to +40 °C) up to 10000 feet (3000m)
• 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.
• Do not operate the system if the fan assembly is removed or if it is not functioning properly. An
overtemperature condition can cause severe equipment damage or an unscheduled system shutdown.
• 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 system is exposed to abnormally low temperatures, allow a two hour warm up period, in ambient
temperature no lower than 32°F (0 °C) before turning 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 supervisor engines, modules, and power supplies. If there are any constraints with regard to the free
flow of air through the chassis, or if the ambient air temperature is elevated, the switch environmental monitor
may then shut down the system to protect the system components.
To maintain proper air circulation through the switch chassis, we recommend that you maintain a minimum
space of 6 inches (15 cm) between a wall and the chassis and power supply unit air intakes or a wall and the
chassis and power supply unit hot air exhausts. In situations where the switch chassis are installed in adjacent
racks, you should allow a minimum space 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 may cause the
switch chassis that is drawing in the hot exhaust air to overheat and fail.
Figure 4: Air Flow Direction - Cisco Catalyst 9400 Series Switches
The figure shows the chassis and power supply air flow directions in a Catalyst 9407R Switch. The same air
flow direction applies to all Cisco Catalyst 9400 Series Switches.
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
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Preparing for Installation
Temperature