Router Cooling and Airflow Requirements
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The ACX5400 routers are available with either front-to-back airflow (airflow out, ports-to-FRUs, or AFO), or back-to-front
airflow (airflow in, FRUs-to-ports, or AFI). In AFO models, the air is pulled through the front of the chassis toward the
fan modules, from where it is exhausted out of the chassis. In AFI models, the air is pulled through the fan modules and
toward the front of the chassis, from where it is exhausted out of the chassis. The fan modules and the power supply
modules (PSMs) are available in both AFO and AFI variants.
and
show the airflow through the two
router models.
•
For the cooling system to function properly, the airflow around the chassis must be unrestricted.
•
The PSMs are self-cooling and are located in the rear of the router. The exhaust for the PSMs are also located on the
rear of the chassis.
•
The rack or cabinet must have an adequate supply of cooling air.
Figure 14: Air Out Airflow (AFO) Through the ACX5400 Chassis
g100525
FRUs
Ports
Figure 15: Air In Airflow (AFI) Through the ACX5400 Chassis
g100524
FRUs
Ports
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