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EX4100 System Overview

SUMMARY Learn about the key features and benefits, models and specifications, and FRUs and extension modules of EX4100 switches.

EX4100 Ethernet Switch

The EX4100 switches are suitable for small, medium, and large campus and branch enterprise deployments. You can use the switch models in high, medium, or low-density environments. The EX4100 switch models have field-replaceable units (FRUs) such as AC/DC power supplies and fan modules.

You can manage the EX4100 switches from the cloud and on premise. The switches allow for simple, efficient, and scalable network management using cloud-based hosted management applications, on-premise management tools, and APIs.

EX4100 switches offer a strong hardware foundation with best-in-class security in combination with the simplicity of the cloud and the power of Mist AI. You can use Juniper Mist Wired Assurance to onboard, configure, and manage EX4100 from the cloud with minimal effort. You can manage EX4100 switches by using the CLI or J-Web also.

EX4100 switches support Layer 2 (L2) and Layer 3 (L3) technologies. You can deploy the switches on the core, distribution, or access layers, providing a multisite network overlay.

These are the key benefits of EX4100 switches:

  • Compact solution—The EX4100 switches are single-rack unit devices. They are ideal solutions for crowded wiring closets and access switch locations such as data centers, campuses, and branch offices. They provide carrier-class reliability of modular systems with the economics and flexibility of stackable platforms.

  • Virtual Chassis—EX4100 switches support Virtual Chassis technology. You can interconnect up to 10 EX4100 switches to form a Virtual Chassis.

  • High availability—EX4100 switches provide high availability through redundant power supplies and fans, graceful Routing Engine switchover (GRES), and nonstop bridging and routing when deployed in a Virtual Chassis configuration.

  • Mist Cloud managed—EX4100 switches are built to be cloud native. You can manage activities and features such as onboarding, fast bootup, streaming telemetry, and fast changes (JET) from the Mist cloud. Even though the EX4100 switches are built specifically for management in the Mist cloud, you can manage them on premise if you prefer.

  • EVPN VXLAN—EX4100 switches can act as L2 and L3 VXLAN gateways to support a mix of legacy endpoints and newer devices. In combination with VXLAN, EVPN provides the capability to connect a multi-site enterprise customer network in an open and standards-based manner.

  • Multigigabit—Newer wave 2 and 802.11ax access points can use higher interface speeds on network switches to support higher scale and bandwidth for users and applications.

EX4100 Switch Models

EX4100 line of switches consist of both PoE and non-PoE models and multigigabit port models. These switches run on either AC or DC power and support either back-to-front or front-to-back airflow. provides a summary of the EX4400 switch models. Click on each link in the table to find more information about the model.

EX4100 line of switches consist of both PoE and non-PoE models and multigigabit port models. These switches run on either AC or DC power and support either back-to-front or front-to-back airflow. provides a summary of the EX4400 switch models. Click on each link in the table to find more information about the model.

Table 1: EX4100 Switch Models

Gigabit Models

Multigigabit

EX4100-24P (PoE+)

EX4100-24MP (PoE++)

EX4100-24T (non-PoE)

EX4100-48MP (PoE++)

EX4100-48P (PoE+)

EX4100-48T (non-PoE)

  

Virtual Chassis

EX4100 switches have dedicated Virtual Chassis ports (VCPs) that you can use to interconnect member switches of a Virtual Chassis. Only homogenous virtual chassis is supported; that is, you can connect any EX4100 switch, including EX4100 multigigabit switch and EX4100-F switch, in a virtual chassis. You can interconnect a maximum of 10 switches to form a Virtual Chassis. You can operate these interconnected switches as a single, logical device with a single IP address. If you operate the interconnected switches as a single device, you must use all the Virtual Chassis ports as Virtual Chassis ports or use all of them as network ports. You cannot mix multiple types of ports within a single, logical device.

For more information about Virtual Chassis, see Understanding EX Series Virtual Chassis.

Power over Ethernet Ports

EX4100 switches are available with or without Power over Ethernet (PoE) or Power over Ethernet Plus (PoE+/PoE++) capability. Models that support PoE, PoE+, or PoE++ provide that support on all of their RJ-45 downlink ports. The switch models provide perpetual and fast PoE functionality. PoE, PoE+, and PoE++ ports provide electrical current to devices—such as IP phones, wireless access points, and security cameras—through network cables. Because the network cables provide electrical current, you do not need separate power cords for those devices.

  1. The EX4100-24P and EX4100-48P switch models support PoE+ (30 W) by default.

  2. The EX4100-24MP and EX4100-48MP switch models support PoE++ (90W) by default.

For more information about PoE support on EX series switches, see Understanding PoE on EX Series Switches.

Note:

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

EX4100 Cooling System

The cooling system in EX4100 switches consists of fan modules. The airflow direction depends on the fan modules and power supplies installed in the switch. You can order an EX4100 switch that supports front-to-back airflow or back-to-front airflow, as follows:

  • Front-to-back airflow: Air enters through the front of the switch.

  • Back-to-front airflow: Air enters through the back of the switch.

The fan modules are hot-removable and hot-insertable field-replaceable units (FRUs) installed in the rear panel of the switch. You can remove and replace the FRUs without powering off the switch or disrupting switch functions.

EX4100 Power System

The following list presents the EX4100 switch models with their compatible power systems:

  • EX4100-24P and EX4100-48P use the 920W AC AFO (Airflow Out) PSU (Power Supply Unit) FRUs.

  • EX4100-24MP and EX4100-48MP use the 920W AC AFO (Airflow Out) PSU (Power Supply Unit) FRUs.

  • EX4100-24T uses the 150W AC AFO PSU FRU.

  • EX4100-24T-DC uses the 150W DC AFO PSU FRU.

  • EX4100-48T uses the 150W AC AFO PSU FRU.

  • EX4100-48T-DC usess the 150W DC AFO PSU.

  • EX4100-48T-AFI uses the 150W AC AFI (Airflow In) PSU FRU.

FRU power supplies of EX4100 switch models are fully redundant, load-sharing, hot-removable and hot-insertable when the second power supply is installed and running. You can remove and replace them without powering off the switch or disrupting switch functions. The EX4100 switches ship with one power supply preinstalled in the rear panel of the chassis. Each power supply includes its own internal cooling system.

CAUTION:

Avoid mixing:

  • AC and DC power supplies in the same chassis.

  • Power supplies with different airflow directions in the same chassis.

  • Fan modules with different airflow directions in the same chassis.

  • Power supplies and fan modules with different airflow directions in the same chassis.

If you install power supplies or fan modules with different airflow directions, Junos OS raises an alarm.

Field-Replaceable Units in EX4100 Switches

Field-replaceable units (FRUs) are components that you can replace at your site. The FRUs in EX4100 switches are hot-removable and hot-insertable. You can remove and replace them without powering off the switch or disrupting switch functions. The FRUs in EX4100 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.

Acoustic Noise Measurements Sound Pressure (ISO 7779) for EX4100 Switches

#concept_hhg_lpm_d5b__table_w3y_3dn_3vb provides the acoustic noise measurements for the EX4100 switch models.

Table 2: Acoustic Noise Measurements for EX4100 Switch Models
   

Sound Pressure (Acoustics)

Switch Model

Power Supply

LpA (dB)

Typical

1PSU/2PSU

Max

1PSU/2PSU

EX4100-24T

150 AC AFO

NA

38.1/38.0

EX4100-24T-DC

150 DC AFO

NA

37.8/37.6

EX4100-24P

920W AC AFO

39.4/40.0

49.4/50.1

EX4100-48T

150 AC AFO

NA

39.1/39.2

EX4100-48T-AFI

150 AC AFI

NA

38.4/38.2

EX4100-48T-DC

150 DC AFO

NA

37.5/37.7

EX4100-48P

920W AC AFO

38.7/39.3

46.1/48.2

EX4100-24MP

920W AC AFO

38.9/39.4

46.5/51.1

EX4100-48MP

920W AC AFO

36.8/48.0

45.3/54.3

Mounting Options for EX4100 Switches

The following table summarizes the mounting options for EX4100 switch models.

Table 3: EX4100 Mounting Options

Mounting kit

SKU no

Provided/Orderable

Usage

Details

Supported models

2-post rack mounting kit

EX-RMK

Provided

2-post rack mounting

EX-RMK is 2-post RMK for standard width chassis, most commonly used.

EX4100-24P, EX4100-24T, EX4100-48P, EX4100-48T, EX4100-24MP, and EX4100-48MP.

Adjustable 4-post rack-mount kit

EX-4PST-RMK

Orderable

4-post rack mounting

EX4100-24P, EX4100-24T, EX4100-48P, EX4100-48T, EX4100-24MP, and EX4100-48MP

Wall mount kit

EX-WMK

Orderable

Wall mounting

EX4100-24P, EX4100-24T, EX4100-48P, EX4100-48T, EX4100-24MP, and EX4100-48MP.