Figure 52: 1 U Fan Module Used In Qfx5100 Switches; Figure 53: 2 U Fan Module Used In Qfx5100-96S Switches - Juniper QFabric QFX3000-G Hardware Documentation

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Chapter 4: QFX5100 Overview

Figure 52: 1 U Fan Module Used in QFX5100 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.

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

. Likewise, port-to-FRU airflow is indicated by either a gold color or the label

. On legacy switches or switches with LCDs, this airflow is also called front-to-back and

back-to-front.

Table 13 on page 90

lists the available fan module product SKUs and the

direction of airflow in them:

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