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.
Caution
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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Preparing for Installation
Air Flow Guidelines for Enclosed Rack Installation