Juniper EX4100 User Manual

Table 11: Airow Direcon in EX4100 and EX4100-F Switch Models (Connued)
Model Number Fan Modules and Power
Supply
Direcon of Airow
• EX4100-F-24P
• EX4100-F-48P
Two built-in fans with AFO
cooling.
Front-to-back—cold air to
cool the chassis enters
through the vents on the
front panel of the chassis,
and hot air exits through
the vents on the rear panel
of the chassis.
EX4100-48T-AFI The switch ships with two
fan modules and an AC
power supply, each with a
label AIR IN and a Juniper
Azure Blue handle.
Back-to-front—cold air to
cool the chassis enters
through the vents on the
rear panel of the chassis,
and hot air exits through
the vents on the front panel
of the chassis.
CAUTION: Do not mix:
• Power supplies with dierent airow direcons in the same chassis.
• Fan modules with dierent airow direcons in the same chassis.
• Power supplies and fan modules with dierent airow direcons in the same chassis.
If you install power supplies or fan modules with dierent airow direcons, Junos OS
raises an alarm.
Under normal operang condions, the fan modules operate at a moderate speed.
Temperature sensors in the chassis monitor the temperature within the chassis.
If a fan module fails, or if the ambient temperature inside the chassis rises above the
acceptable range, Junos OS raises an alarm. If the temperature inside the chassis rises
above the threshold temperature, the system shuts down automacally.
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Juniper EX4100 Specifications

General

Model	EX4100
Category	Switch
Layer	Layer 2/3
Power Consumption	Varies by model and configuration
PoE	Optional
Management	Web UI, CLI, SNMP
Operating Temperature	0°C to 45°C
Input Voltage	100-240V AC
Storage Temperature	-40°C to 70°C
Humidity	5% to 90% non-condensing
DC Power Input	-48V DC
JUNOS OS	Yes
Security Features	ACLs
Layer 2 Features	VLAN, RSTP, MSTP, LACP
Layer 3 Features	Static routing, OSPF
QoS	8 queues per port