Figure 86: Management Board For A Qfx3500 Device; Table 24: Airflow Direction In Qfx3500 Device Models - Juniper QFabric QFX3000-G Hardware Documentation

Table 24: Airflow Direction in QFX3500 Device Models

Model
QFX3500-48S4Q-ACR
QFX3500-48S4Q-AFI
QFX3500-48S4Q-AFO
Copyright © 2018, Juniper Networks, Inc.

Figure 86: Management Board for a QFX3500 Device

Chassis
status LEDs
LCD display
Q FX 35 00 -4
8S 4Q
USB
Management
port
ports
The QFX3500 device provides FRU-to-port or port-to-FRU airflow depending on the
device model you purchase.
models and their direction of airflow.
NOTE: In QFX Series device model names, AFI, or airflow in, describes
FRU-to-port airflow. AFO, or airflow out, describes port-to-FRU airflow.
NOTE: The front panel of the device where the power supplies, fan trays, and
management boards are located is the FRU side of the device.
In the QFX3500 device models that have FRU-to-port airflow, the air intake to cool the
chassis is located on the front panel of the chassis, where the FRUs are installed. Air is
pulled into the chassis and pushed away from the fan trays and management board. Hot
air exhausts from the rear of the chassis, where the ports are located. See
Figure 87 on page 126.
Fan modules
Console
port
Table 24 on page 125 lists the different QFX3500 device
Direction of Airflow
FRU-to-port
FRU-to-port
Port-to-FRU
Chapter 6: QFX3500 Overview
125