Cisco NCS 540 매뉴얼 - 페이지 3

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Cisco NCS 540에 대해서도 마찬가지입니다: 설치 준비 (14 페이지)

Prepare for Installation

• Front clearance—5 inches (12.7 centimeters)

• Rear clearance—2 inches (5.08 centimeters)

Figure 1: Airflow Side View for N540-24Q8L2DD-SYS

Note the following points:

• When installing the router in a back-to-back position with another device, ensure that there is a minimum

of 3.9 inches (10 centimeters) airflow clearance between the two devices.

• If airflow through the equipment rack and the routers that occupy it is blocked or restricted, or if the

ambient air being drawn into the rack is too warm, an overtemperature condition may occur within the

rack and the routers that occupy it.

• The site must be as dust-free as possible. Dust tends to clog the router fans, reducing the flow of cooling

air through the equipment rack and the routers that occupy it, thereby increasing the risk of an

overtemperature condition.

• Enclosed racks must have adequate ventilation. Ensure that the rack is not congested because each router

generates heat. An enclosed rack must have louvered sides and a fan to provide cooling air. The equipment

generates heat near the bottom of the rack, which can be drawn upward into the intake ports of the

equipment above.

• When mounting a router in an open rack, ensure that the rack frame does not block the exhaust fans.

• When rack-installed equipment fails, especially equipment in an enclosed rack, try operating the equipment

by itself, if possible. Power off all the other equipment in the rack (and in adjacent racks) to give the

router maximum cooling air and clean power.

• Avoid installing the router in a location in which the router air intake vents may draw in the exhaust air

from adjacent equipment. Consider how the air flows through the router; the airflow direction is front to

back, with ambient air drawn in from the vents located on the sides of the router.

Airflow Guidelines

Prepare for Installation