Juniper QFabric QFX3008-I, Manual, Page: 54 / 472

Figure 12: Airflow Through the QFX3100 Director Device
g050058
Front
Rear
Temperature sensors in the chassis monitor the temperature within the chassis. The
system raises an alarm if the fan fails or if the temperature inside the chassis rises above
permitted levels. If the temperature inside the chassis rises above the threshold, the
system shuts down automatically.
Related
Documentation
Installing a Fan Module in a QFX3100 Director Device on page 314
•
•
Removing a Fan Module from a QFX3100 Director Device on page 312
•
Rear Panel of a QFX3100 Director Device on page 26
•
Prevention of Electrostatic Discharge Damage on page 192
Network Modules in a QFX3100 Director Device
The network module in a QFX3100 Director device (see Figure 13 on page 29 ) is a
field-replaceable unit (FRU) that you install in one of the two bottom slots on the front
panel. The QFX3100 Director device is shipped with two network modules. You must
power down the QFX3100 Director device before replacing a network module.
There are two types of network modules:
• RJ-45 network module—Provides four 1000BASE-T RJ-45 ports. See “Cable
Specifications for Control Plane Connections for the QFX Series” on page 129 for
information about the required cables.
• SFP network module—Provides four 1-Gbps small form-factor pluggable (SFP) ports.
See
“Interface Specifications for Control Plane Connections for the QFabric System”
on page 124 for information about the supported transceivers and required cables.
Each network module provides four ports that connect the QFX3100 Director device to
the QFX3000 QFabric switch control plane and management network and connect two
QFX3100 Director devices to form a QFX3100 Director group.
Copyright © 2012, Juniper Networks, Inc. 28
QFX3000 Hardware Documentation