Spec Sheet
3
Data SheetEX3400 Ethernet Switch
can be managed as a single device utilizing a single Junos OS
image and a single configuration file, reducing the overall number
of units to monitor and manage. When the Junos OS is upgraded
on the master switch in an EX3400 Virtual Chassis configuration,
the software is automatically upgraded on all other member
switches at the same time.
In addition, a feature called system snapshot makes a copy of
all software files used to run the switch, including the Junos
operating system, the active configuration, and the rescue
configuration. These copies can be used to reboot the switch the
next time it is powered up or as a backup boot option. The Junos
OS software can also be preinstalled on a flash drive and used to
boot the EX3400 at any time.
Another feature, called automatic software download, enables
network administrators to easily upgrade the EX3400 using
the DHCP message exchange process to download and install
software packages. Users simply configure the automatic
software download feature on EX3400 switches acting as DHCP
clients and establish a path to the server where the software
package file is installed. The server then communicates the path
to the software package file through DHCP server messages.
A zero touch provisioning (ZTP) feature allows a DHCP server
to push configuration details and software images to multiple
switches at boot-up time.
Three system management options are available for the EX3400
line. The standard Junos OS CLI management interface offers
the same granular capabilities and scripting parameters found in
any router powered by the Junos operating system. The EX3400
also includes the integrated J-Web interface, an embedded Web-
based device manager that allows users to configure, monitor,
troubleshoot, and perform system maintenance on individual
switches via a browser-based graphical interface.
Juniper Networks Junos Space Network Director software can be
used to manage the EX3400, both as a standalone device and as
satellite devices in a Junos Fusion Enterprise deployment.
Finally, EX3400 fault, configuration, and performance data can
also be exported to leading third-party management systems
such as HP OpenView, IBM Tivoli, and Computer Associates
Unicenter software, providing a complete, consolidated view of
network operations.
Features and Benefits
Power
The EX3400 supports the 802.3af Class 3 Power over Ethernet
(PoE) and 802.3at PoE+ standards for supporting networked
devices such as telephones, video cameras, IEEE 802.11ac WLAN
access points, and videophones in converged networks. While
EX3400 switches ship with a single power supply by default,
they can support redundant 600W or 920W power supplies that
provide PoE (15.4W) or PoE+ (30W) power to all ports in the
switch. Spare power supplies can be ordered as needed.
There are two PoE power mode settings on the EX3400 switches:
• Static mode allows customers to specify the maximum PoE
power setting on an individual port.
• Class mode allows end devices to specify PoE class and
negotiate whether the switch can provide PoE power to
the device.
The EX3400 also supports the industry-standard Link Layer
Discovery Protocol (LLDP) and LLDP-Media Endpoint Discovery
(LLDP-MED), which enable the switches to automatically
discover Ethernet-enabled devices, determine their power
requirements, and assign virtual LAN (VLAN) parameters. LLDP-
MED-based granular PoE management allows the EX3400 to
negotiate PoE usage down to a fraction of a watt on powered
devices, enabling more efficient PoE utilization across the switch.
The EX3400 supports the IEEE 802.3az standard for Energy
Ecient Ethernet (EEE) functionality, reducing power consumption
of copper physical layers during periods of low link utilization.
In addition, the EX3400 supports rich quality-of-service (QoS)
functionality for prioritizing data, voice, and video traffic. The
switches support 12 QoS queues (8 unicast and 4 multicast) on
every port, enabling them to maintain multilevel, end-to-end
traffic prioritization. The EX3400 also supports a wide range of
scheduling options, such as priority and shaped-deficit weighted
round-robin (SDWRR) scheduling.
Security
The EX3400 switches fully interoperate with Juniper Networks
Access Policy Infrastructure, which consolidates all aspects of a
user’s identity, device, and location, enabling administrators to
enforce access control and security down to the individual port
or user levels. Working as an enforcement point in the Access
Policy Infrastructure, the EX3400 provides both standards-
based 802.1X port-level access control and Layer 2-4 policy
Table 1: EX3400 PoE Power Budget
SKU Total 10/100/
1000BASE-T Ports
Total 30 W PoE+
Ports That Can Be
Enabled
Total 15.4 W PoE
Ports That Can Be
Enabled
Power Supply Type PoE+ Power Budget
(W)
EX3400-24P 24 24 ports up to 30W 24 ports up to 15.4W AC 370W/720W
EX3400-48P 48 48 ports up to 30W 48 ports up to 15.4W AC 740W/1440W