Juniper QFX5110, Hardware Manual

Page: 47 / 222

Table 12: Fan Modules in the QFX5110 (continued)
You must install
only power
supplies that have
AIR IN labels in
switches in which
the fan modules
have
AIR IN
labels.
FRU-to-port, that is, air
comes in from the end of
the switch with the fans;
air exhausts from the
switch end with ports
(also known as
back-to-front airflow). Juniper Azure
Blue AIR IN Figure 12 on page 28 QFX5110-32Q-FANAFI
You must install
only power
supplies that have
AIR OUT
labels in
switches in which
the fan modules
have
AIR OUT
labels.
Port-to-FRU, that is, air
comes in through vents on
the end with ports; air
exhausts out the end with
the fans (also known as
front-to-back airflow). Juniper Gold
AIR OUT
Figure 13 on page 29 QFX5110-32Q-FANAFO
In data center deployments, position the switch in such a manner that the AIR IN labels
on switch components are next to the cold aisle, and AIR OUT labels on switch
components are next to the hot aisle. See Figure 10 on page 27 through
Figure 13 on page 29 .
Figure 10: Air In Airflow Through the QFX5110-48S
27 Copyright © 2017, Juniper Networks, Inc.
Chapter 3: Cooling System and Airflow