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CiscoASR 9000 Series Aggregation Services Router Hardware Installation Guide
Chapter1 Preparing for Installation
Site Requirement Guidelines
Cisco ASR 9904 Clearance Requirements
To install the Cisco ASR 9904 Router in a 4-post enclosed cabinet:
•Ensure that you have the following clearances around the chassis:
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Rear: Minimum of 2.45 inches (62.2 cm) of clearance.
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Sides: Minimum of 6.00inches (152.4 cm) of clearance on each side of the chassis.
Figure 1-25 shows the side and rear chassis air-flow clearance requirements for mounting the Cisco ASR
9904 Router in a 4-post enclosed rack.