Site Environment - Cisco 7000 Hardware Installation And Maintenance

Site Requirements
Caution
air-conditioned.

Site Environment

The router operates as a standalone system placed on a table or as a rack-mounted system in a data
processing or lab environment. Because the noise level of the chassis blower is approximately
60 dBa, it is best suited for unattended or computer room use.
The router requires a dry, clean, well-ventilated, and air-conditioned environment. An internal
blower pulls cooling air through the chassis from the front (intake) to the rear (exhaust). The flow of
ambient air must be maintained to ensure normal operation. If the airflow is blocked or restricted, or
if the intake air is too warm, an overtemperature condition can occur. Under extreme conditions, the
environmental monitor will shut down the system to protect the system components. To assure
normal operation and avoid unnecessary maintenance, plan your site configuration and prepare your
site before installation. After installation, make sure the site maintains an ambient temperature of
0–40°C (32–104°F), and keep the area around the chassis as free from dust as is practical. For a
description of the environmental monitor and status levels, refer to the section "Environmental
Monitoring and Reporting Functions" in the chapter "Product Overview."
If the temperature of the room air drawn into the chassis is higher than desirable, the air temperature
inside the chassis may also be too high. This condition can occur when the wiring closet or rack in
which the chassis is mounted is not ventilated properly, when the exhaust of one device is placed so
it enters the air intake vent of the chassis, or when the chassis is the top unit in an unventilated rack.
Any of these conditions can inhibit airflow and create an overtemperature condition.
Multiple routers can be rack-mounted with little or no clearance above and below the chassis.
However, when mounting a router in a rack with other equipment, or when placing it on the floor
with other equipment located close by, ensure that the exhaust from other equipment does not blow
into the intake vent (lower front panel) of the chassis.
Table 2-12 lists the operating and nonoperating environmental site requirements. To maintain
normal operation and ensure high system availability, maintain an ambient temperature and clean
power at your site. The following ranges are those within which the router will continue to operate;
however, a measurement that is approaching the minimum or maximum of a range indicates a
potential problem. You can maintain normal operation by anticipating and correcting environmental
anomalies before they exceed the maximum operating range.
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2-82 Cisco 7000 Hardware Installation and Maintenance
Never install the router in an enclosed rack that is not properly ventilated or
Operating temperature range: 32 to 104°F (0 to 40°C).
Operating humidity range: 10 to 90%, noncondensing.
Airflow: Cooling air is drawn in through the bottom front panel of the chassis. Keep the front
panel clear of obstructions, including dust, and away from the exhaust ports of other equipment.
Keep the air filter clean.