Juniper QFX5220, Руководство по оборудованию, Страница: 51 / 247

Figure 12: Fan module for QFX5220-128C
g051168
The QFX5220-128C brings air into the vents in the port panel and exhausts warmed air through the
field-replaceable units (FRU) panel. This type of airflow is know as airflow out or port-to-FRU airflow. Airflow
out fans are distinguished by AIR OUT marking on the orange (Juniper gold) handles. In data center
deployments, position the switch in such a manner that the AIR OUT labels on the switch components
are next to the hot aisle.
You remove and replace a fan module from the FRU end of the chassis. The switch continues to operate
for a limited period of time (30 seconds) during the replacement of the fan module without thermal
shutdown. Figure 13 on page 53 shows the airflow through the chassis.
Figure 13: Air Out Airflow Through the QFX5220-128C Chassis
g051192
Ports FRUs
53