Table 12: Airflow Direction in QFX3500 Device FRUs
Direction of AirflowModelFRU
FRU-side-to-port-sideQFX3500-MBRJ-45 management board
Port-side-to-FRU-sideQFX3500-MB-RJ45-AFO
FRU-side-to-port-sideQFX3500-MB-SFP-AFISFP management board
Port-side-to-FRU-sideQFX3500-MB-SFP-AFO
FRU-side-to-port-sideQFX3500-FANAIFan tray
Port-side-to-FRU-sideQFX3500-FAN-AFO
FRU-side-to-port-sideQFXC01-PWRACI-650AAC power supply
Port-side-to-FRU-sideJPSU-650W-AC-AFO
FRU-side-to-port-sideJPSU-650W-DC-AFIDC power supply
Port-side-to-FRU-sideJPSU-650W-DC-AFO
The chassis includes a fan speed-control system. Under normal operating conditions,
fans operate at reduced speed to reduce noise and power consumption.
Temperature sensors in the chassis monitor the temperature within the chassis. The
system raises an alarm if a fan fails or if the temperature inside the chassis rises above
permitted levels. If the temperature inside the chassis rises above the threshold, the
device shuts down automatically. You can see the status of fans and the temperature
remotely through the CLI by issuing the operational mode command show chassis
environment.
You cannot replace a single fan module. If one or more fan modules fail, you must replace
the entire fan tray or management board.
Related
Documentation
Field-Replaceable Units in a QFX3500 Device on page 63•
• Installing a Fan Tray in a QFX3500 Device on page 365
• Removing a Fan Tray from a QFX3500 Device on page 367
• Installing a Management Board in a QFX3500 Device on page 368
• Removing a Management Board from a QFX3500 Device on page 369
Management Board for a QFX3500 Device
The management board for a QFX3500 device (see Figure 42 on page 72) is a
field-replaceable unit (FRU) that you install on the front panel.
71Copyright © 2012, Juniper Networks, Inc.
Chapter 4: QFX3500 Overview
To Next Page
Loading...
Need help?
General
