Juniper EX4600 Series User Manual

CHAPTER 3
Cooling System and Airflow
•
Cooling System and Airflow in an EX4600 Switch on page 13
Cooling System and Airflow in an EX4600 Switch
The cooling system in an EX4600 switch consists of five fan modules and a single fan
in each power supply. The switch can be set up to work in one of two airflow directions:
•
Airflow In–Air comes into the switch through the vents in the field-replaceable units
(FRUs)
•
Airflow Out–Air comes into the switch through the vents in the port panel.
CAUTION: Airflow In and Airflow Out fans and power supplies cannot be
mixed in the same chassis.
This topic describes:
•
Fan Modules on page 13
•
Do Not Install Components with Different Airflow or Wattage in the Switch on page 16
•
Fan Module Status on page 17
Fan Modules
The fan modules in EX4600 switches are hot-insertable and hot-removable
field-replaceable units (FRUs). These fan modules are designed for one of the two
available airflow directions (Airflow In or Airflow Out) and are the same fan units used
in the QFX5100 Series of switches. Some modules are also color-coded for the airflow
direction as well. The fan modules are installed in the fan module slots on the
management panel of the switch next to the power supplies. The fan module slots are
numbered 0 through 4 from left to right. Each slot has a fan icon next to it.
Figure 6 on page 14 shows the fan module for the EX4600.
13Copyright © 2014, Juniper Networks, Inc.
* Optics, Fans and Power supply sold separately for EX4600-40F-S.

Juniper EX4600 Series Specifications

General

Product Series	EX4600
10GbE ports	24 or 48
Cooling	Front-to-back or back-to-front airflow
Rack Units	1 U
Virtual Chassis	Up to 10 members
MAC address table size	288, 000 entries
Memory	8 GB DRAM
Layer 3 Routing	Yes
AC Power Input	100-240V AC
Ports	24 or 48 x 10GbE ports
40GbE ports	4
100GbE ports	0
Power Supply	Dual redundant, hot-swappable AC or DC
Jumbo frames	9216 bytes
Operating temperature	0°C to 45°C
Input voltage	100-240 VAC, -40 to -72 VDC
Operating relative humidity	5% to 90% noncondensing
Fans	Redundant
JUNOS OS	Junos OS
Storage	16 GB flash
DC Power Input	-40 to -72 VDC