Juniper EX9214 Hardware Manual
Download Hardware manual of Juniper EX9214 Network Router, Switch for Free or View it Online on All-Guides.com.
Brand: Juniper
Category: Network Router , Switch
Type: Hardware manual for Juniper EX9214
Pages: 372
Airflow Direction in the EX9214 Switch Chassis
The air intake to cool the chassis is located on the front of the chassis, below the lower
fan tray. Air is pulled through the chassis toward the fan tray, pushed up through the line
card slots, and through the upper fan tray. See Figure 21 on page 44.
Figure 21: Airflow Through the EX9214 Switch Chassis
The host subsystem monitors the temperature of switch components. Under normal
operating conditions, the fans in the fan tray run at less than full speed. If a fan fails or
the ambient temperature rises above the threshold, the speed of the remaining fans is
automatically adjusted to keep the temperature within the acceptable range. If the
ambient maximum temperature specification is exceeded and the system cannot be
adequately cooled, the Routing Engine shuts down the system by disabling output power
from each power supply.
You cannot replace a single fan. If one or more fans fail, you must replace the entire fan
tray.
Related
Documentation
• Field-Replaceable Units in an EX9200 Switch on page 19
• Installing a Fan Tray in an EX9200 Switch on page 183
• Removing a Fan Tray from an EX9200 Switch on page 186
Copyright © 2017, Juniper Networks, Inc.44
EX9214 Switch Hardware Guide