Step 1: Begin
In this guide, we provide a simple, three-step path, to quickly get you up and running with your new EX4400. We’ve simplified and shortened the installation and configuration steps, and included how-to videos. You’ll learn how to install an AC-powered EX4400, power it up, and configure basic settings.
Are you interested in getting hands-on experience with the topics and operations covered in this guide? Visit Juniper Networks Virtual Labs and reserve your free sandbox today! You’ll find the Junos Day One Experience sandbox in the stand alone category. EX switches are not virtualized. In the demonstration, focus on the virtual QFX device. Both the EX and QFX switches are configured with the same Junos commands.
Meet the EX4400 Ethernet Switches
Juniper Networks® EX4400 Ethernet Switches are our first cloud-ready switches. You can manage EX4400 switches deployed in a cloud network by using Juniper Mist™. EX4400 switches support Virtual Chassis technology, making it easy for you to scale the network without increasing the number of devices to manage. You can also channelize the QSFP28 ports to increase the number of interfaces.
The EX4400 switches are available in 24-port and 48-port models, with AC or DC power supplies, and with different airflow directions. The RJ-45 ports in EX4400-24P, EX4400-24MP, EX4400-48P, and EX4400-48MP switches support IEEE 802.3bt (PoE-bt), providing up to 90 W per port. All switch models provide a slot for installing an optional extension module.
In this guide, we show you how to install an AC-powered EX4400 switch with the fan modules and a power supply preinstalled. If you need instructions for installing fans, power supplies, and optional extension modules, see the EX4400 Switch Hardware Guide.
Here are the port configuration details for the EX4400 switch models:
EX4400-24T and EX4400-24P
EX4400-48T and EX4400-48P
Install the EX4400
What's in the Box?
EX4400 switch with two preinstalled fan modules and one preinstalled AC power supply
One AC power cord appropriate for your geographical location
An Ethernet cable
An RJ-45 to DB-9 serial port adapter
Two brackets to mount the switch in a two-post rack or on two posts of a 19-in. four-post rack
Eight screws to attach the mounting brackets to the chassis
Four rubber feet to mount the switch on a desktop or other level surface
Covers for the empty extension module slot and the empty power supply slot
What Else Do I Need?
Someone to help you secure the switch to the rack
Four rack mount screws appropriate for your rack to secure the switch to the rack
A number 2 Phillips (+) screwdriver
An electrostatic discharge (ESD) grounding strap
A management host such as a laptop or desktop PC
A serial-to-USB adapter (if your laptop or desktop PC doesn’t have a serial port)
Two 10-32 x .25-in. screws with #10 split-lock washers to secure the grounding lug
A grounding cable: 14 AWG (1.5 mm²), minimum 90° C wire, or as permitted by the local code, with a Panduit LCD10-10AF-L or equivalent lug attached
Ensure that a licensed electrician has attached the appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.
Install the EX4400 in a Rack
Before you start the installation, be sure to review the General Safety Guidelines and Warnings. Also, have someone available to help you secure the switch to the rack.
You can install the EX4400 switch on a desktop or other level surface, in a two-post or four-post rack, or on a wall. The mounting kit that ships in the box has the brackets you need to install the EX4400 switch in a two-post rack or on the front posts of a 19-in four-post rack. We’ll walk you through how to install the switch in a two-post rack.
If you want to install the switch in a four-post rack or on the wall , you’ll need to order separate mounting kits. The four-post rack mount kit also has brackets for mounting the EX4400 switch in a recessed position in the rack.
Let's get going and start the installation!
- Place the switch on a flat, stable surface.
- Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to a site ESD point.
- Attach the mounting brackets to the sides of the EX4400 switch using the eight screws in the rack mount kit and a screwdriver.
- Lift the switch and position it in the rack. Position
the switch so that the
AIR INlabels on the fan modules are facing the cold aisle, or the
AIR OUTlabels on the fan modules are facing the hot aisle. Line up the bottom hole in each mounting bracket with a hole in each rack post, making sure the switch is level.
- While you’re holding the switch in place, have a second person insert and tighten the rack mount screws to secure the mounting brackets to the rack posts. Make sure to tighten the screws in the two bottom holes first, and then tighten the screws in the two top holes.
- Check that the mounting brackets on each side of the rack are lined up with each other.
- Cover the empty extension module and the power supply slots by using the covers that came with the switch.
The slot covers reduce the risk of objects or substances entering the chassis. They also ensure optimal cooling for the switch.
Now you’re ready to connect the EX4400 switch to a dedicated AC power source. The switch comes with the AC power cord for your geographic location.
Here's how to connect the EX4400 switch to AC power:
- Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to a site ESD point.
- Connect one end of the grounding cable to a proper earth ground, such as the rack.
- Place the grounding lug attached to the grounding cable over the protective earthing terminal on the rear panel.
- Secure the grounding lug to the protective earthing terminal using the 10-32 x .25-in. screws with #10 split-lock washers.
- Dress the grounding cable. Be sure that the cable doesn’t block access to or touch other device components, and that it doesn’t drape where people could trip over it.
- Ensure that the power supply is fully inserted in the rear panel of the switch.
On the rear panel, connect the retainer strip and power cord to the AC power socket:
- Push the end of the retainer strip into the hole next to the AC power socket until it snaps into place. Ensure that the loop in the retainer strip points upward.
- Press the small tab on the retainer strip to loosen the loop.
- Slide the loop until you have enough space to insert the power cord into the AC power socket.
- Firmly plug in the power cord to the AC power socket on the switch.
- Slide the loop toward the power supply until it is snug against the base of the power cord coupler.
- Press the tab on the loop, and draw out the loop into a tight circle.
- If the AC power source outlet has a power switch, turn it off.
- Plug in the power cord to the AC power source outlet.
- If the AC power source outlet has a power switch, turn it on. The switch powers on as soon as you plug it in. The EX4400 doesn't have a power switch.
- Check to see that the
OUT.OKLED on the power supply is lit steadily green. If not, disconnect the power supply from the power source. You’ll need to replace the power supply (see Maintain the EX4400 Power System in the EX4400 Switch Hardware Guide).