Cisco ASR-920-12CZ-A Hardware Installation Manual page 40

Site Planning
This space ensures that you can remove the Cisco ASR 920 Series Router components and perform
routine maintenance and upgrades easily.
Avoid installing the Cisco ASR 920 Series Router in a congested rack and consider how routing of
cables from other pieces of equipment in the same rack could affect access to the router cards.
The front and rear of the chassis must remain unobstructed to ensure adequate airflow and prevent
overheating inside the chassis.
To avoid problems during installation and ongoing operations, follow these general precautions when
you plan equipment locations and connections:
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Locating for Proper Airflow
Ensure that the Cisco ASR 920 Series Router location has enough airflow to keep the system operating
within the environmental characteristics and the air temperature is sufficient to compensate for the heat
dissipated by the system. For more information, see the
Cisco ASR 920 Series Aggregation Services Router Hardware Installation Guide
2-18
Use the show environment all command regularly to check the internal system status. The
environmental monitor continually checks the interior chassis environment; it provides warnings
about high temperature and creates reports on other potentially dangerous occurrences. If warning
messages are displayed, take immediate action to identify the cause, and correct the problem.
Keep the Cisco ASR 920 Series Router off the floor and out of areas that collect dust.
Follow ESD-prevention procedures to avoid damage to equipment. Damage from static discharge
can cause immediate or intermittent equipment failure.
Chapter 2 Preparing for Installation
"Air Flow Guidelines" section on page 11.
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