Juniper EX3300 Complete Hardware Guide

Table 14: Airflow Direction in EX3300 Switch Models (continued)
Direction of AirflowModel
Front-to-backEX3300-24T-DC
Front-to-backEX3300-48T
Back-to-frontEX3300-48T-BF
Front-to-backEX3300-48P
Front-to-Back Airflow
In front-to-back airflow models, the air intake is located on the front of the chassis. Cool
air is pulled into the chassis and pushed toward the rear of the chassis. Hot air exhausts
from the rear of the chassis. See Figure 10 on page 23.
Figure 10: Front-to-Back Airflow Through the EX3300 Switch Chassis
g021205
Chassis rear
Chassis front
Fan
Fan
Air intake
Fan air
exhaust
Air intake
Air exhaust
Back-to-Front Airflow
In back-to-front airflow models, the air intake is located on the rear of the chassis. Cool
air is pulled into the chassis and pushed toward the front of the chassis. Hot air exhausts
from the front of the chassis. See Figure 11 on page 24.
23Copyright © 2015, Juniper Networks, Inc.
Chapter 2: Component Descriptions

Juniper EX3300 Specifications

General

Ethernet LAN	Yes
Authentication method	RADIUS, TACACS+
Connectivity technology	Wired
Ethernet interface type	Gigabit Ethernet
Number of VLANs	4096
Networking standards	IEEE 802.1ab, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3x, IEEE 802.3z
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Copper ethernet cabling technology	1000BASE-T, 100BASE-TX, 10BASE-T
Console port	-
ExpressCard slot	No
Fiber ports quantity	4
USB 2.0 ports quantity	0
Basic switching RJ-45 Ethernet ports quantity	48
Throughput	130 Mpps
Number of queues	8
MAC address table	16000 entries
Maximum data transfer rate	176 Gbit/s
Supported data transfer rates	10, 100, 1000Mbps
Switch type	Managed
Switch layer	L2
Security algorithms	SSH-2
Power source	AC
AC input voltage	100 - 240 V
Power consumption (typical)	100 W
Form factor	1U
Product color	Black
Flash memory	1024 MB
Processor frequency	1000 MHz
Compatible operating systems	Junos
Operating altitude	0 - 3049 m
Non-operating altitude	0 - 4877 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	10 - 85 %
Supported network protocols	IPv6

Weight and Dimensions

Depth	310 mm
Width	437 mm
Height	44 mm
Weight	4900 g