Back-To-Front Airflow; Do Not Mix Air In (Afi) And Air Out (Afo) Components In The Switch - Juniper EX4300 Series Hardware Manual

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Back-to-Front Airflow

In the EX4300 switch models that have back-to-front airflow, the air intake to cool the chassis is

through the vents on the rear panel and hot air exhausts through the vents on the front panel of the

Figure 41 on page

Figure 41: Back-to-Front Airflow Through the 24-Port and 48-Port EX4300 Switch Chassis

You must install only power supplies that have AIR IN (AFI) labels in switches in which the fan modules

have AIR IN (AFI) labels.

Do not mix power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR OUT

(AFO)) in the same chassis. If the fan modules have AIR IN (AFI) labels, the power supplies must also

have AIR IN (AFI) labels; if the fan modules have AIR OUT (AFO) labels, the power supplies must also

have AIR OUT (AFO) labels.