Air Flow Guidelines For Enclosed Rack Installation - Cisco ASR 9901 Manual

Preparing for Installation

Air Flow Guidelines for Enclosed Rack Installation

Caution
Do not install the Cisco ASR 9901 or Cisco ASR 9001 Router in any type of fully-enclosed rack that does
not have the required perforated sides or doors; the router requires an unobstructed flow of cooling air to
maintain acceptable operating temperatures for its internal components. Installing the router in any type of
fully-enclosed rack without proper perforation could disrupt the air flow, trap heat next to the chassis, and
cause an over-temperature condition inside the router.
Air Flow Guidelines for Enclosed Rack Installation
To install a Cisco ASR 9901 or Cisco ASR 9001 Router in an enclosed cabinet, the front and rear doors of
the cabinet must be removed or be perforated with a minimum of 65% open area (70% for ETSI 800mm
racks).
Cisco ASR 9901
If you are mounting the Cisco ASR 9901 chassis in a 2-post or 4-post enclosed cabinet, ensure that you have
minimum of 6 inches (15.24 cm) of clearance in the front and rear of the chassis.
The following figure shows the air flow clearance requirements for mounting the Cisco ASR 9901 Router in
a 2-post or 4-post enclosed rack.
Figure 12: ASR 9901 Clearance Requirements for an Enclosed Rack Installation
Preparing for Installation
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