Connecting the QFX5220 to External Devices
Ground the QFX5220-128C
To connect earth ground to a QFX5220-128C:
Connect Power to the QFX5220-128C
The QFX5220-128C is shipped from the factory with four power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install a replacement power supply in either of the two slots next to the fan modules without powering off the switch or disrupting the switching function.
To connect AC power to a QFX5220-128C:
Ground the QFX5220-32CD and Connect Power
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect the QFX5220 to earth ground before you connect it to power.
For installations that require a separate grounding conductor to the chassis, you must attach a protective earthing terminal bracket on the QFX5220 left front mounting bracket to connect to the earth ground. See Figure 3.
A ground connection to the protective earthing terminal is not required by an AC-powered switch. the AC power cords provide adequate grounding when you connect the power supply in the switch to a grounded AC power outlet by using the AC power cord appropriate for your geographical location.
If an external ground connection is required, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the device.
Mount your switch in the rack or cabinet before attaching the grounding lug to the switch. See Mounting a QFX5220 in a Rack or Cabinet.
Ensure that you have the following parts and tools available:
Grounding cable for your QFX5220 device—The grounding cable must be 14 AWG (2 mm²), minimum 90° C wire, or as permitted by the local code.
Grounding lug for your grounding cable—The grounding lug required is a Panduit LCD10-10A-L or equivalent. The grounding lug attaches to the device chassis through the left-front mounting bracket, providing a protective earthing terminal for the device.
Two SAE 10-32 x 0.25 in. screws with number10 split-lock washers—Two screws are used to secure the grounding lug to the protective earthing terminal. These screws and washers are not provided.
Number 2 screwdriver.
An AC-powered QFX5220 switch chassis gains additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using an AC power cord appropriate for your geographical location. See AC Power Cord with Type C15 Coupler Specifications.
To connect earth ground to a QFX5220-32CD:
Connect a Device to a Network for Out-of-Band Management
Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. Figure 4 shows the RJ-45 connector of the Ethernet cable supplied with the device.

You can monitor and manage these devices by using a dedicated management channel. Each device has a management port to which you can connect an Ethernet cable with an RJ-45 connector. Use the management port to connect the device to the management device.
To connect a device to a network for out-of-band management (see Figure 5):
- Connect one end of the Ethernet cable to the management port on the device.
- Connect the other end of the Ethernet cable to the management device.

Connect a Device to a Management Console Using an RJ-45 Connector
Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. One such cable and an RJ-45 to DB-9 serial port adapter are supplied with the device.
Figure 6 shows the RJ-45 connector of the Ethernet cable.

If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to connect your laptop or desktop PC directly to the device, use a combination of the RJ-45 to DB-9 socket adapter supplied with the device and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.
You can configure and manage devices using a dedicated management channel. Each device has a console port which you can connect to using an Ethernet cable with an RJ-45 connector. Use the console port to connect the device to the console server or management console. The console port accepts a cable that has an RJ-45 connector.
To connect the device to a management console (see Figure 7 and Figure 8):
- Connect one end of the Ethernet cable to the console port (labeled CON, CONSOLE, or CON1) on the device.
- Connect the other end of the Ethernet cable to the console server (see Figure 7) or management console (see Figure 8).

