Juniper QFX Series User Manual

Figure 21: Location of Top Fan Tray
g050101
Top fan tray
(behind door)
Rear cards 0–7
Wiring tray 1
Grounding points (below wiring trays)Power supplies 0–5
Wiring
tray 0
ESD point
Control Board 0
Control Board 1
The chassis continues to operate for a limited time (2 minutes) after a fan tray has been
removed.
CAUTION: You must replace a fan tray within 2 minutes of removing it.
The chassis has front-to-back airflow. The air intake to cool the front card cage and
power supplies is located on the front bottom of the chassis. Cool air is pulled into the
chassis and is pushed through the front card cage toward the rear fan tray. Hot air exhausts
from the upper rear of the chassis. See the side view in Figure 22 on page 47 for this
airflow.
The same air intake directs cool air to the power supplies and wiring trays. The hot air
passes through the power supplies and wiring trays and exhausts on the rear of the
chassis at the bottom. See the side view in Figure 22 on page 47 for this airflow.
Copyright © 2012, Juniper Networks, Inc.46
QFX3000 Hardware Documentation

Juniper QFX Series Specifications

General

Category	Switch
Series	QFX
Form Factor	1U, 2U, and modular chassis options
Power Supply	Redundant, hot-swappable power supplies
Cooling	hot-swappable fans
Virtual Chassis	Supported on certain models
Typical Use	Data center, cloud
Operating System	Junos OS
Management	CLI
Key Features	High performance, low latency, automation
Latency	Sub-microsecond latency
Port Density	Varies by model (e.g., QFX5100: up to 48x10GbE + 6x40GbE)