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Cisco 7204 Installation and Configuration Guide
OL-5101-02
Chapter1 Product Overview Physical Description
Figure1-16 Internal Air Flow—Top View
The left and right sides of the chassis must remain unobstructed to ensure adequate air flow and prevent
overheating inside the chassis; we recommend at least three inches of clearance. (See the “Site
Requirements” section on page 2-4 in the chapter Chapter2, “Preparing for Installation.”)
Temperature sensors on the network processing engine and I/O controller monitor th e int erna l air
temperature and send warning messages when the internal air temperature approaches a specified
threshold. If the internal temperature exceeds the specified threshold, the system environmental monitor
shuts down all internal power to prevent equipment damage from excessive heat.
Chassis
The Cisco 7 204 chassis, shown in Figure 1-17, has four slots for the port adapters, one slot for the I/O
controller, and one bay for the subchassis. To replace the chassis, you must remove all of the internal
components, including the subchassis.
Note Because you must remove all the internal components when replacing the chassis, refer to the
configuration notes that explain how to remove and replace the internal co mpon en t s. T hes e doc um en ts
are available on Cisco.com.
H6237
Power supply end
Port adapter end
Inlet
airflow
Exhaust
air