Figure 22: 1 U Fan Module Used in QFX5100 Switches
Figure 23: 2 U Fan Module Used in QFX5100-96S Switches
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.
NOTE: All fan modules must be installed for optimal operation of the switch.
The fan modules are available in two product SKUs that have different airflow
directions—FRU-to-port airflow, indicated on some units by the azure blue color or a
label. FRU-to-port airflow versions of the fan module that have labels are marked AIR
IN . Likewise, port-to-FRU airflow is indicated by either a gold color or the label AIR OUT
. On legacy switches or switches with LCDs, this airflow is also called front-to-back and
back-to-front. Table 10 on page 41 lists the available fan module product SKUs and the
direction of airflow in them:
Copyright © 2016, Juniper Networks, Inc.40
QFX5100 Switch Hardware Guide
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