Juniper EX3400-24P User Manual
EX3400 Ethernet Switch
Data Sheet
Product Overview
Juniper Networks EX3400
Ethernet Switch delivers a highperformance, flexible, and costeffective solution for today’s
most demanding converged data,
voice, and video enterprise access
environments.
To simplify network operations,
the EX3400 is hardware-ready1
to act as a satellite device to
support a Juniper Networks Junos
Fusion Enterprise deployment,
which can combine several
wiring closets into one logical
management platform. The
EX3400 also supports Juniper
Networks Virtual Chassis
technology, allowing up to 10
switches to be interconnected
over uplink ports and managed
as a single device, delivering
a scalable, pay-as-you-grow
solution for expanding network
environments.
Product Description
The Juniper Networks® EX3400 Ethernet Switch with Juniper Networks Junos® Fusion
Enterprise and Virtual Chassis technology provides enterprises with the flexibility and ease
of management that previously was only available with higher-end access switches. The
fixed-configuration EX3400 supports a number of key features, including:
• Junos Fusion Enterprise allows large numbers of EX3400 switches to be configured
as satellite devices that connect to an EX9200 core aggregation switch to create a
single logical device.
• 24-port and 48-port models with and without Power over Ethernet (PoE/PoE+) are
for campus wiring closet deployments.
• Data center-optimized cooling options offer both front-to-back and back-to-front
airflows, making the EX3400 suitable for GbE data center access deployments.
• Two redundant, field-replaceable power supplies each provide up to 920 watts of
power.
• 24-port data center models are included for metro deployments.
• Four dual-mode (GbE/10GbE) small form-factor pluggable transceiver (SFP/SFP+)
uplink ports and two 40GbE QSFP+ ports are available.
• Uplink ports can be configured as Virtual Chassis interfaces and connected via
standard 10GbE/40GbE optic interfaces (40GbE uplink ports are preconfigured by
default as Virtual Chassis ports).
• Comprehensive Layer 2 functionality with RIP and static routing is provided.
• A compact, 13.8-inch deep 1 U form factor supports flexible deployment options.
• An easy-to-manage solution includes centralized software upgrades and a single
management interface.
• Support is available for the same consistent modular Juniper Networks Junos
operating system control plane feature implementation used by all other Juniper
fixed-configuration Juniper Networks EX Series Ethernet Switches.
• Support Is provided for Layer 3 (OSPF v2, IGMP v1/v2/v3, PIM, VRRP, Q-in-Q, BFD,
virtual router) via an enhanced feature license (optional license required).
• Support is available for IPv6 management, including neighbor discovery, stateless
auto configuration, telnet, SSH, DNS, system log, NTP, ping, traceroute, ACL, CoS
static routing, and RIPng.
• IPv6 routing features (OSPFv3, virtual router support for unicast, VRRPv6, PIM,
MLDv1/v2) are supported via an enhanced feature license.
• Energy Efficient Ethernet (EEE) capability is provided.
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Software to come in future
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Data SheetEX3400 Ethernet Swi tch
EX9200 Aggregation Devices
Architecture and Key Components
Junos Fusion Enterprise Technology
Junos Fusion Enterprise technology provides automated
network configuration and simplifies scalability for medium
to large enterprise networks. Using Juniper Networks EX9200
programmable switches as aggregation devices and switches as
satellite nodes, Junos Fusion Enterprise technology can be deployed
across a building (or multiple buildings) to connect large numbers of
switches in a fabric that can be managed as a single device.
With Junos Fusion technology, enterprises can reduce network
complexity and operational costs by collapsing underlying network
elements into a single logical point of control from Junos OS-
based Juniper routing and switching platforms. It is designed for
customers who need to cost-eectively deploy numerous switch
ports throughout their enterprise campus network and manage
them all from a central device. The EX3400 switches can be easily
added to a Junos Fusion Enterprise architecture with a simple
soware upgrade, oering full investment protection.
In Junos Fusion Enterprise deployments, satellite devices are not
required to be individually connected to aggregation devices.
Up to 10 satellite devices can be interconnected via standard
10GbE/40GbE interfaces to form a “cluster,” which in turn can
be connected to the aggregation device(s) over a pair of fiber
uplinks. Satellite devices or clusters can also be dual-homed or
single- homed to the aggregation devices.
set of criteria or preconfigured policies. The master switch
automatically creates and updates the switching and optional
routing tables on all switches in the Virtual Chassis configuration.
Virtual Chassis technology allows switches to be added or
removed without service disruption. An EX3400 Virtual Chassis
configuration operates as a highly resilient unified system,
providing simplified management using a single IP address,
single telnet session, single command-line interface (CLI),
automatic version checking, and automatic configuration. The
EX3400 switches are also capable of local switching, so that
packets coming into a port destined for another port on the same
switch do not have to traverse the Virtual Chassis, increasing the
forwarding capacity of the switch.
The EX3400 implements the same slot/module/port numbering
schema as other Juniper Networks chassis-based products
when numbering Virtual Chassis ports, providing true chassis-like
operations. By using a consistent operating system and a single
configuration file, all switches in a Virtual Chassis configuration
are treated as a single device, simplifying overall system
maintenance and management.
The two QSFP+ ports on the EX3400 switch can be configured
as Virtual Chassis ports or as uplinks to aggregation devices.
Closet 1
EX3400
10GbE uplinks
In Junos Fusion Enterprise deployments, satellite devices forward all
trac to the aggregation device, enabling network administrators
to monitor and manage the entire enterprise campus building from
a single device. Features such as PoE/PoE+, LLDP-MED, and 802.1x
are also supported in Junos Fusion Enterprise architectures to help
meet enterprise campus requirements.
EX3400 Satellite Devices
Figure 1: EX3400 Junos Fusion Enterprise deployment
Virtual Chassis Technology
The EX3400 supports Juniper Networks Virtual Chassis technology,
allowing up to 10 switches to be interconnected over uplink ports
and managed as a single logical device, delivering a scalable, pay-
as-you-grow solution for expanding network environments.
When deployed in a Virtual Chassis configuration, the EX3400
switches elect a primary and backup switch based on a
40GbE Virtual Chassis
Closet 2
EX3400
40GbE Virtual Chassis
10GbE uplinks
Aggregation
Figure 2: EX3400 Virtual Chassis deployments
Simplified Management and Operations
Junos Fusion Enterprise technology dramatically simplifies
EX3400 management by enabling a large number of the
switches to be managed from a single interface when deployed
as satellite devices. With features such as plug-and-play
deployment and rolling software upgrades, Junos Fusion
Enterprise eliminates the need to individually manage every
access switch in the enterprise environment, leading to lower
operational costs and overall lower TCO.
Virtual Chassis technology simplifies network management for
smaller deployments. Up to 10 interconnected EX3400 switches
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Data SheetEX3400 Ethernet Swi tch
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.
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.
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.
Table 1: EX3400 PoE Power Budget
SKU Total 10/ 100/
1000BASE-T Ports
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
Total 30 W PoE+
Ports That Can Be
Enabled
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
Total 15.4 W PoE
Ports That Can Be
Enabled
Power Supply Type PoE+ Power Budget
(W)
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Data SheetEX3400 Ethernet Swi tch
enforcement based on user identity, location, device, or a
combination of these. A user’s identity, device type, machine
posture check, and location can be used to not only grant or deny
access but also to determine the duration of access. If access is
granted, the switch assigns the user to a specific VLAN based on
authorization levels. The switch can also apply QoS policies or
mirror user traffic to a central location for logging, monitoring, or
threat detection by an intrusion prevention system (IPS).
The EX3400 also provides a full complement of port security
features, including Dynamic Host Configuration Protocol (DHCP)
snooping, dynamic ARP inspection (DAI), and media access
control (MAC) limiting to defend against internal and external
spoofing, man-in-the-middle, and denial-of-service (DoS) attacks.
MACsec
EX3400 switches support IEEE 802.1ae MACsec, providing
support for link-layer data confidentiality, data integrity, and data
origin authentication. The MACsec feature enables the EX3400
to support 88 Gbps of near line-rate hardware-based traffic
encryption on all GbE and 10GbE ports.
Defined by IEEE 802.1AE, MACsec provides secure, encrypted
communication at the link layer that is capable of identifying
and preventing threats from DoS and intrusion attacks, as well
as man-in-the-middle, masquerading, passive wiretapping,
and playback attacks launched from behind the firewall. When
MACsec is deployed on switch ports, all traffic is encrypted on the
wire but traffic inside the switch is not. This allows the switch to
apply all network policies such as QoS, deep packet inspection,
and sFlow to each packet without compromising the security of
packets on the wire.
Hop-by-hop encryption enables MACsec to secure
communications while maintaining network intelligence. In
addition, Ethernet-based WAN networks can use MACsec to
provide link security over long-haul connections. MACsec is
transparent to Layer 3 and higher-layer protocols and is not
limited to IP traffic—it works with any type of wired or wireless
traffic carried over Ethernet links.
Junos Operating System
The EX3400 switches run the same Junos OS that is used by
other Juniper Networks EX Series Ethernet Switches, QFX Series
Switches, Juniper Routers, Juniper SRX Firewalls, and the Juniper
NFX Series Network Services Platform. By utilizing a common
operating system, Juniper delivers a consistent implementation
and operation of control plane features across all products.
To maintain that consistency, Junos OS adheres to a highly
disciplined development process that uses a single source
code and employs a highly available modular architecture that
prevents isolated failures from bringing an entire system down.
These attributes are fundamental to the core value of the
software, enabling all Junos OS-powered products to be updated
simultaneously with the same software release. All features are
fully regression tested, making each new release a true superset
of the previous version. Customers can deploy the software with
complete confidence that all existing capabilities are maintained
and operate in the same way.
Converged Environments
The EX3400 switches provide a flexible solution for demanding
converged data, voice, and video environments. The EX3400-
24P and EX3400-48P support PoE+, delivering up to 30 watts of
power per port to support networked devices such as telephones,
video cameras, IEEE 802.11ac wireless LAN (WLAN) access
points, and videophones. The PoE+ standard provides nearly
double the 15.4 watts per port available with the IEEE 802.3af
PoE standard.
High Availability
The EX3400 line of Ethernet switches is designed to support
many of the same failover capabilities and high availability (HA)
functionality as other Juniper EX access switches with Virtual
Chassis technology.
Each EX3400 switch is capable of functioning as a Routing Engine
(RE) when deployed in a Virtual Chassis configuration. When two
or more EX3400 switches are interconnected in a Virtual Chassis
configuration, all member switches share a single control plane.
Junos OS automatically initiates an election process to assign a
Product Options
Table 2: EX3400 Ethernet Switch Models
SKU Total 10/ 100/
1000BASE-T
Ports
EX3400-24T 24
EX3400-48T 48 Front-to-back AC 0 120 150W
EX3400-48T-AFI 48 Back-to-front AC 0 120 150W
EX3400-24P 24 PoE+ Front-to-back AC 370W2/720W
EX3400-48P 48 PoE+ Front-to-back AC 740W2/1440W
EX3400-24T-DC 24 Front-to-back DC 0 100 150W
2
1 power supply
3
2 power supplies
* Input power without PoE
Uplinks Airflow Power
Supply
Type
Front-to-back AC 0 100 150W
10GbE/GbE
SFP+/SFP
ports
2 40GbE
QSFP+ ports
PoE+ Power
Budget (W)
Consumption
3
3
Max . Sys tem
Power
*
(W)
110 600W
120 920W
Power Supply
Rating (W)
4
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