EX4100-H-12T Overview

Meet the EX4100-H-12T

EX4100-H-12T switches are ruggedized industrial Ethernet switches. These switches are temperature-hardened and are deployed inside indoor or outdoor enclosures with proper air flow.

You can manage the switches from the cloud and on premises. These switches can be used for simple, efficient, and scalable network management using cloud-based hosted management applications, on-premise management tools, and APIs.

EX4100-H-12T 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 the EX4100-H-12T from the cloud with minimal effort. You can also manage these switches by using the CLI or J-Web.

EX4100-H-12T switches support Layer 2 (L2) and Layer 3 (L3) technologies. You can deploy these switches on the core, distribution, or access layers, providing a multisite network overlay.

The key benefits of EX4100-H-12T switches are as follows:

Compact solution—The EX4100-H-12T switch is a modular system and is ideal for use inside enclosures with proper airflow. This switch model is fanless and comes with convection cooling. The switch model is designed to operate reliably under extended temperature ranges. The switch provides carrier-class reliability of modular systems with the economics and flexibility of stackable platforms.
Virtual chassis—EX4100-H-12T switches support Virtual Chassis technology. You can interconnect up to 10 switches to form a Virtual Chassis. You can interconnect EX4100-H-12T switches with EX4100 and/or EX4100-F switches in a Virtual Chassis configuration
High availability—EX4100-H-12T switches provide high availability through redundant power supplies, graceful Routing Engine switchover (GRES), and non-stop bridging and routing when you deploy the switches in a Virtual Chassis configuration.
Mist cloud managed—EX4100-H-12T switches are built to be cloud native. You can manage activities and features such as onboarding, fast boot-up, streaming telemetry, and fast changes (JET) from the Mist cloud. Even though the EX4100-H-12T switches are built specifically for management in the Mist cloud, you can manage them on premises if you prefer.
EVPN VXLAN—EX4100-H-12T 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.

Table 1: EX4100-H-12T Description
EX4100-H-12T Switch
Form factor	3 RU
Chassis type	Fixed configuration
Operating system	Junos OS
Power system	DC
Cooling system	Fanless convection cooling
Port configuration	Twelve 1 Gigabit-Ethernet (GbE) non-PoE BASE-T ports Two 1/10 Gbps SFP/SFP+ MACsec-enabled uplink ports Two 1/10 Gbps SFP/SFP+ VCPs. MACsec supported in Network mode.
Storage	eUSB 8 GB
Memory	4 GB DRAM
Managed using	Juniper® Mist Junos OS CLI

For a list of device models and their specifications, see EX4100-H-12T Switch Model.

Virtual Chassis

The EX4100-H-12T switch supports HiGig over Ethernet (HGoE) mode and Network mode. Refer Understanding HGoE Modes in a Virtual Chassis.

HGoE mode is the default Virtual Chassis mode for all EX4100-H-12T switches. To form a Virtual Chassis between EX4100-H-12T and EX4100 or EX4100-H-12T and EX4100-F switches, the Virtual Chassis mode needs to be HGoE on EX4100-H-12T. In HGoE mode, mixed mode is supported. You can operate the interconnected switches as a single device and use some VCPs as VCPs and some VCPs as network ports.

On EX4100-H-12T switches, a Virtual Chassis is supported only on VCPs and uplink ports and not on access ports.

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

Dry Contact Alarm

The EX4100-H-12T has a dry contact connector on the front panel for dry contact alarms support. The alarm input contact ports can be used to generate alarms on the switch and the alarm output contact ports can be used to connect to external devices.

Table 2: Components of the Dry Contact Alarm
LEDs	Alarm Input Ports	Alarm Relay Ports
IN0—LED for IN0 alarm input IN1 – LED for IN1 alarm input OUT – LED for alarm relay ports (NO, COM, NC)	GND—Grounding port to connect grounding wire IN0 —Alarm input IN1 —Alarm input	NO —Normally open alarm relay port COM—Common alarm relay port NC —Normally closed alarm relay port

Alarm input ports

Alarm input ports are dry contact input ports connecting to security sensors such as door and window monitors. When the alarm input ports receive a signal, the alarm input is sensed and reported to the management software to take further action. If the alarm input signal exceeds the threshold value, the LEDs for the alarm inputs (IN0 and IN1) glow to indicate an alarm condition. There are two input alarm ports (0 and 1). You can configure these ports to operate and trigger an alarm condition. Remember to mandatorily connect a wire to the GND port when configuring an input alarm port or ports.

CAUTION:

The alarm input signal threshold is 5 V.

The dry contact relay can handle a maximum power of 30 W.

Alarm relay ports

The relay on the switch has three alarm relay ports: NO, COM, and NC. The alarm relay ports provide dry contacts to connect to external equipment, such as an audible or visual alarm that switches on or off, for example, a bell or a light. You can configure the alarm relay ports to trigger or activate based on an alarm condition in an input alarm port or a chassis alarm. An alarm condition is indicated by the LED (OUT). The alarm relay ports operate on the principles of a relay.

NO (normally open alarm relay port): No electric voltage under normal conditions. Under abnormal conditions, this port will have electric voltage; the COM will attach to it forming a circuit.
COM (common alarm relay port): Attached to the NC port under normal conditions. Under abnormal conditions, this port attaches to the NO port.
NC (normally closed alarm relay port): Electric voltage present under normal conditions. Under abnormal conditions, this port will not have electric voltage because the COM port will detach from it.

Configuring chassis alarm relays

The following is an example configuration of chassis relay alarms involving a Virtual Chassis with two EX4100-H-12T switches.

In line 1, on FPC 0 of the Virtual Chassis, IN0 is set to trigger a major alarm (red) if an input signal that exceeds the threshold is detected.
In line 2, on FPC 0 of the Virtual Chassis, IN1 is set to trigger a minor alarm (yellow) if an input signal that exceeds the threshold is detected.
In line 3, on FPC 1 of the Virtual Chassis, IN0 is set to trigger a major alarm (red) if an input signal that exceeds the threshold is detected.
In line 4, on FPC 1 of the Virtual Chassis, if a major alarm is triggered by the alarm input port (IN0) of FPC1, then trigger the first alarm relay port (NO).

After setting this configuration, assume you have connected the NO alarm relay port to a buzzer. When an alarm is triggered, the buzzer produces a sound. The OUT LED indicates this alarm in a continuously glowing red pattern. This is one of the use cases of a dry contact alarm. Another use case is when the IN1 LED of FPC 0 senses an alarm signal. Because the IN1 LED of FPC 0 is set to trigger a minor alarm, this alarm condition is indicated by the IN1 LED in the continuously glowing red pattern. You can issue show chassis alarms to view this alarm on the CLI.

Note:

You can set the alarm relay to detect alarm conditions under normally open or normally closed configurations – but not both.
You cannot start using the alarm inputs and alarm relay outputs without initial configuration. Issue the show chassis craft-interface command to view the statuses of alarm inputs and alarm relay outputs. If not configured, configure the alarm inputs and alarm relay outputs – see relay
Issue show chassis alarms to view all alarms including any alarms generated by the alarm inputs and/or alarm relay outputs.
Use show chassis in edit mode to check the configured dry contact alarms.
When configurations are applied for dry contact alarm ports, it takes around 10 to 15 seconds for dry contact alarm LEDs to change their states. Refer Dry Contact Alarm LEDs.
Alarm connector fixing screws recommended torque : 2.65 Lb.in; screwdriver type: slotted/flat head 3.5 mm.
Alarm connector wire clamping screws recommended tightening torque: 1.77 Lb.in; screwdriver type: slotted/flat head 2.5 mm.

Mounting Options for EX4100-H-12T Switches

The following table summarizes the mounting options for EX4100-H-12T switch models.

Table 3: EX4100-H-12T Mounting Options
Mounting Kit (SKU no)	Provided or orderable	Usage	Supported Models
EX4100-H-12P-DRK1	Orderable	DIN rail mounting	EX4100-H-12T Note: This mounting kit is also used for the EX4100-H-12P switch of the EX4100-H series of switches.
EX4100-H-12P-MMK1 Note: The mounting kit is not recommended to use near power substation utilities and near railway tracks.	Orderable	Magnet mount for EX4100-H-12T	EX4100-H-12T Note: This mounting kit is also used for the EX4100-H-12P switch of the EX4100-H series of switches.
EX4100-H-12-RMK	Orderable	2-post rack mount for EX4100-H-12T (screw mounting)	EX4100-H-12T Note: This mounting kit is also used for the EX4100-H-12P switch of the EX4100-H series of switches.
EX4100-H-12P-WMK1	Orderable	Wall mount for EX4100-H-12T	EX4100-H-12T Note: This mounting kit is also used for the EX4100-H-12P switch of the EX4100-H series of switches.
EX4100-H-RM-DRK1	Orderable	2-post rack mount with DIN rail for EX4100-H-12T	EX4100-H-12T Note: This mounting kit is also used for the EX4100-H-12P switch of the EX4100-H series of switches.

Where can you use the EX4100-H-12T

These switches are expected to operate reliably under extended temperature ranges. The following are common deployment use cases of the EX4100-H-12T switches:

Smart cities and safe cities
Transportation (outdoor/traffic signals)
Factory floors
Surveillance
Railway networks
Defense networks (outdoors with extended temperature ranges)
Gaming casinos (inside enclosures)
Airport terminals