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EX3400 System Overview

EX3400 Switches Hardware Overview

Juniper Networks EX Series Ethernet Switches provide scalable connectivity for the enterprise market, including branch offices, campus locations, and data centers. The switches run the Juniper Networks Junos operating system (Junos OS), which provides Layer 2 and Layer 3 switching, routing, and security services.

Juniper Networks EX3400 Ethernet Switches provide connectivity for low-density environments.

Benefits of the EX3400 Switch

High flexibility—EX3400 switches provide a flexible solution that supports converged data, voice, and video environments.

Support for 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 EX3400 to support 88 Gbps of near line-rate hardware-based traffic encryption on all Gigabit Ethernet and 10 Gigabit Ethernet ports.

Nondisruptive software upgrades—EX3400 switches feature a resilient operating system that supports high availability (HA) features such as graceful Routing Engine switchover (GRES), nonstop active routing (NSR), and nonstop software upgrade (NSSU), providing software upgrades and changes without disrupting network traffic.

EX3400 Switches First View

EX3400 switches provide:

  • Either 24 or 48 RJ-45 ports (labeled 0 through 23 or 0 through 47) that support 10/100/1000BASE-T Gigabit Ethernet connectors.

  • Four uplink ports (labeled 0 through 3 on the front panel) that support small form-factor pluggable (SFP) transceivers and small form-factor pluggable plus (SFP+) transceivers, and two 40-Gigabit Ethernet ports (labeled 0 through 1 on the rear panel) that support quad small form-factor pluggable plus (QSFP+) transceivers.

  • Virtual Chassis capability—You can connect up to 10 EX3400 switches together to form one unit that you manage as a single chassis, called a Virtual Chassis.

  • Power over Ethernet (PoE) or Power over Ethernet plus (PoE+) on all RJ-45 ports (in PoE-capable models).

Uplink Ports

EX3400 switches have autosensing uplink ports that you can use to:

  • Connect an access switch to a distribution switch

  • Interconnect member switches of a Virtual Chassis

The QSFP+ uplink ports are configured as Virtual Chassis ports (VCPs) by default. You can use these ports to interconnect Virtual Chassis members. To use the QSFP+ uplink ports as network ports, you must configure them as network ports. The uplink ports on the front panel are configured as network ports by default. To use the uplink ports on the front panel as VCPs, you must configure them as VCPs. See Setting an Uplink Port on an EX Series or QFX Series Switch as a Virtual Chassis Port.

The uplink ports on the front panel support four 1-gigabit SFP transceivers, four 10-gigabit SFP+ transceivers, or a combination of four SFP+ and SFP transceivers. The QSFP+ uplink ports support 40-gigabit QSFP+ transceivers. For a list of supported transceivers, see Pluggable Transceivers Supported on EX3400 Switches.

Note:

You cannot form a Virtual Chassis by using SFP transceivers.

Virtual Chassis

You can interconnect a maximum of 10 EX3400 switches to form a Virtual Chassis. You can operate these interconnected switches as a single, logical device with a single IP address.

You can use the following ports to interconnect an EX3400 switch in a Virtual Chassis:

  • QSFP+ ports configured as VCPs by using QSFP+ transceivers

  • Note:

    You cannot form a Virtual Chassis by using SFP transceivers.

    Uplink ports on the front panel configured as VCPs by using SFP+ transceivers

By default, the QSFP+ ports are configured as VCPs.

Console Ports

EX3400 switches have two console ports—an RJ-45 console port and a Mini-USB Type-B console port. The RJ-45 console port is on the rear panel of the switch and the mini-USB console port is on the front panel. Both console ports are labeled CON. The RJ-45 console port accepts a cable that has an RJ-45 connector and the Mini-USB Type-B console port accepts a Mini-B plug (5-pin) connector to connect to the console management device.

Power over Ethernet Ports

EX3400 switches are available with or without Power over Ethernet (PoE) or Power over Ethernet Plus (PoE+) capability. Models that support PoE or PoE+ provide that support on all RJ-45 ports. PoE ports provide electrical current to devices—such as IP phones, wireless access points, and security cameras—through network cables, thus eliminating the need for separate power cords for those devices.

Note:

IEEE 802.3at class 4 powered devices require category 5 or higher Ethernet cables.

The remainder of this documentation uses the term PoE for both PoE and PoE+ unless there is a need to distinguish between the two.

EX3400 Switch Models

EX3400 switch models are available:

  • With 24 or 48 RJ-45 ports

  • With or without PoE+ capability

  • With front-to-back or back-to-front airflow

  • With AC or DC power supplies

Table 1 lists the EX3400 switch models.

Table 1: EX3400 Switch Models

Model

Access Ports

Power Supply Provided by Default

Ports in Which PoE+ Is Available

Maximum System Power Available for PoE/PoE+

Direction of Airflow

First Junos OS Release

EX3400-24T

24 Gigabit Ethernet

JPSU-150-AC-AFO

–

–

Front-to-back

15.1X53-D50

EX3400-24P

24 Gigabit Ethernet

JPSU-600-AC-AFO

All 24 ports

  • 720 W with two 600 W power supplies installed

  • 370 W with one 600 W power supply installed

Front-to-back

15.1X53-D50

EX3400-24T-DC

24 Gigabit Ethernet

JPSU-150W-DC-AFO

–

–

Front-to-back

15.1X53-D51

EX3400-48T

48 Gigabit Ethernet

JPSU-150-AC-AFO

–

–

Front-to-back

15.1X53-D50

EX3400-48T-AFI

48 Gigabit Ethernet

JPSU-150-AC-AFI

–

–

Back-to-front

15.1X53-D50

EX3400-48P

48 Gigabit Ethernet

JPSU-920-AC-AFO

All 48 ports

  • 1440 W with two 920 W power supplies installed

  • 740 W with one 920 W power supply installed

Front-to-back

15.1X53-D50

EX3400-48T-DC

48 Gigabit Ethernet

JPSU-150W-DC-AFO

–

–

Front-to-back

18.2R3-S4

EX3400 Switch Hardware and CLI Terminology Mapping

This topic describes the hardware terms used in EX3400 switch documentation and the corresponding terms used in the Junos OS CLI. See Table 2.

Table 2: CLI Equivalents of Terms Used in Documentation for EX3400 Switches

Hardware Item (Field as Displayed in CLI)

Description (Field as Displayed in CLI)

Value (Field as Displayed in CLI)

Item in Documentation

Additional Information

Chassis

One of the following:

  • EX3400-24T

  • EX3400-24P

  • EX3400-24T-DC

  • EX3400-48T

  • EX3400-48T-AFI

  • EX3400-48P

  • EX3400-48T-DC

–

Switch chassis

Chassis Physical Specifications for EX3400 Switches

FPC (n)

On standalone EX3400 switches:

Abbreviated name of the Flexible PIC Concentrator (FPC)

One of the following:

  • EX3400-24T

  • EX3400-24P

  • EX3400-24T-DC

  • EX3400-48T

  • EX3400-48T-AFI

  • EX3400-48P

  • EX3400-48T-DC

Value of n is always 0.

The switch does not have actual FPCs. In this case, FPC refers to the switch itself.

Understanding Interface Naming Conventions

On EX3400 Virtual Chassis: Member ID of the switch within the Virtual Chassis

n is a value in the range of 0–9.

In this case, the FPC number refers to the member ID assigned to the switch.

Understanding Virtual Chassis Components

PIC (n)

Abbreviated name of the Physical Interface Card (PIC)

n is a value in the range of 0–2.

The switch does not have actual PIC devices; see entries for PIC 0 through PIC 2 for the equivalent item on the switch.

Understanding Interface Naming Conventions

One of the following:

  • 24x 10/100/1000 BASE-T

  • 48x 10/100/1000 BASE-T

PIC 0

RJ-45 ports on the front panel of the switch.

Front Panel of an EX3400 Switch

4x GE SFP+

PIC 2

SFP+ uplink ports on the front panel of the switch.

Front Panel of an EX3400 Switch

2x XE QSFP+

PIC 1

QSFP+ uplink ports on the rear panel of the switch.

Rear Panel of an EX3400 Switch

Xcvr (n)

Abbreviated name of the transceiver

n is a value equivalent to the number of the port in which the transceiver is installed.

Optical transceivers

Pluggable Transceivers Supported on EX3400 Switches

Power Supply (n)

One of the following:

  • JPSU-150W-AC-AFI

  • JPSU-150W-AC-AFO

  • JPSU-600W-AC-AFO

  • JPSU-920W-AC-AFO

  • JPSU-150W-DC-AFO

n has a value 0 or 1, corresponding to the power supply slot number.

AC power supply or DC power supply

AC Power Supply in EX3400 Switches

DC Power Supply in EX3400 Switches

Fan Tray

One of the following:

  • Fan Module, Airflow In (AFI)

  • Fan Module, Airflow Out (AFO)

n has a value 0 or 1, corresponding to the fan module slot number.

Fan tray

EX3400 Cooling System

Chassis Physical Specifications for EX3400 Switches

The EX3400 switch chassis is a rigid sheet-metal structure that houses the hardware components. Table 3 summarizes the physical specifications of the EX3400 switch chassis.

Table 3: Physical Specifications of the EX3400 Switch Chassis

Description

Value

Chassis height

1.72 in. (4.37 cm)

Chassis width

  • 17.4 in. (44.1 cm)

  • 19 in. (48.2 cm) with mounting brackets attached

Chassis depth

  • With no power supply installed: 13.78 in. (35 cm)

  • With power supply installed: 15.05 in. (38.24 cm)

Weight

  • EX3400-24T (without power supply or fan modules installed): 9.76 lb (4.43 kg)

  • EX3400-24T-DC (without power supply or fan modules installed): 9.76 lb (4.43 kg)

  • EX3400-24P (without power supply or fan modules installed): 9.97 lb (4.52 kg)

  • EX3400-48T (without power supply or fan modules installed): 10.23 lb (4.64 kg)

  • EX3400-48T-AFI (without power supply or fan modules installed): 10.24 lb (4.64 kg)

  • EX3400-48P (without power supply or fan modules installed): 10.49 lb (4.76 kg)

  • EX3400-48T-DC (without power supply or fan modules installed): 10.23 lb (4.64 kg)

  • JPSU-150-AC-AFO: 1.43 lb (0.65 kg)

  • JPSU-150-AC-AFI: 1.43 lb (0.65 kg)

  • JPSU-600-AC-AFO: 1.82 lb (0.83 kg)

  • JPSU-920-AC-AFO: 1.87 lb (0.85 kg)

  • JPSU-150W-DC-AFO: 1.43 lb (0.65 kg)

  • Fan module: 1.59 lb (0.72 kg)

See Also

Field-Replaceable Units in EX3400 Switches

Field-replaceable units (FRUs) are components that you can replace at your site. The FRUs in EX3400 switches are hot-removable and hot-insertable: You can remove and replace them without powering off the switch. The FRUs in EX3400 switches are:

  • Power supplies

  • Fan modules

  • Transceivers

Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/. Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.