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Fast Track to Rack Installation and Power

This procedure walks you through the most basic steps for installing your QFX5120 switch in a rack and connecting it to power.

You can mount the QFX5120-48T, QFX5120-48Y, and QFX5120-48YM switches in a four-post rack or cabinet using the JNP-4PST-RMK-1U-E rack mount kit. We’ll walk you through the steps to install an AC-powered switch in a square hole four-post rack.

You can mount a QFX5120-32C switch on four posts of a 19-in. rack or cabinet by using a rack mount kit. See Mount a QFX5120-32C Switch on a Four-Post Rack.

Before you install the switch, review:

Install the QFX5120-48T/QFX5120-48Y/QFX5120-48YM Switch in a Rack

To mount the device by using the partial tool less JNP-4PST-RMK-1U-E rack mount kit on a square hole rack:

  1. Wrap and fasten the ESD grounding strap to your bare wrist and connect the other end of the strap to the ESD point on the device.
  2. Assemble the mounting rails.
    1. Slide the rear floating bracket into the front bracket. See Figure 1.
      Figure 1: Assemble the Mounting Rails Diagram showing connection between Front rail and Rear floating rail with an arrow indicating alignment.
    2. Mounting rails assembled. See Figure 2.
      Figure 2: Front and Rear Rails Assembled Metal drawer slides for smooth drawer operation, featuring sections with ball bearings for easy movement.
  3. Attach the mounting rails to the rack.
    1. Align the guide blocks of the rear mounting rails with the rear-post holes. Pull the rear mounting rails toward the front of the rack to lock the rails in place. You will hear a click sound when the latch locks into the corresponding rack holes. See Figure 3.
      Figure 3: Install the Rear Floating Rails Diagram showing rack rail installation in a server rack with arrows indicating rail alignment to front and rear rack posts.
    2. Move the latch lock on the front mounting rails to open position, slide the front mounting rails, and insert the guide blocks into the front rack posts. See Figure 4.
      Figure 4: Install the Front Mounting Rails Installing rack rails in a server rack with arrows and labels guiding the attachment to front and rear posts.
    3. Push the lock latch to the locked position. See Figure 5.
      Figure 5: Front Mounting Rails Lock Latch Latch mechanism for securing a panel, showing lever rotation direction with arrows.
    4. Visually ensure that the front and rear latches are locked into place on the mounting rails. See Figure 6.
      Figure 6: Mounting Rails Installed and Locked Installing rack mount rail system in a server rack with green circles highlighting screws and clips for attachment.
  4. Attach mounting brackets to the device if not pre-installed. If your device already has the mounting brackets pre-installed than skip this step and move to the next step.
    1. Align the holes on the mounting bracket with the screw holes on the side panel of the chassis.
    2. Insert the flat head M4 x 6mm Phillips screws to attach the mounting bracket into the aligned holes on the chassis (see Figure 7). Tighten the screws.
      Figure 7: Attach the Mounting Brackets to the Device Installing a Juniper Networks device in a rack with brackets and screws placement indicated by dashed lines.
  5. Position the device in such a manner that the AIR OUT labels on components are next to the hot aisle.
  6. Grasp both sides of the device, lift it, and position the device such that the mounting rails slide into the channels of the mounting brackets. See Figure 8.
    Figure 8: Slide the Device into the Rack Installing a Juniper Networks device onto rack rails in a server rack with arrows showing direction and inset of mounting screws.
  7. Tighten the two thumbscrews to secure the device. See Figure 9.
    Figure 9: Tighten the Thumb Screws Juniper Networks device being installed in a server rack with screws securing it to vertical rails.

Connect to Power

Ground the QFX5120 Switch

To ground the QFX5120 switch:

  1. Wrap and fasten one end of the electrostatic discharge (ESD) cable grounding strap around your bare wrist, and connect the other end to a site ESD point.

  2. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
  3. Place the grounding lug attached to the grounding cable over the protective earthing terminal:
    Figure 10: Connect a Grounding Cable to the QFX5120-32C Back of a power supply unit showing a plugged-in power connector, cable retention mechanism, and fastening screw.
    Figure 11: Connect a Grounding Cable to the QFX5120-48T or QFX5120-48Y Installing a network patch panel into a server rack with screw alignment details.
    Figure 12: Connect a Grounding Cable to the Protective Earthing Terminal in the Rear of the Left Panel on the QFX5120-48YM Mounted on Four Posts Rack-mounted device being installed in server rack using screws and washers for secure attachment to vertical rails.
    Figure 13: Connect a Grounding Cable to the Protective Earthing Terminal in the Front of the Left Panel on the QFX5120-48YM Mounted on Four Posts Technical illustration of installing a rack-mounted network patch panel into a server rack, showing screw alignment and attachment.
    Figure 14: Connect a Grounding Cable to the Protective Earthing Terminal in the Rear of the Left Panel on the QFX5120-48YM Mounted on Two Posts Grounding lug installation on a rack-mounted network switch with a grounding wire for safety and interference prevention.
    Figure 15: Connect a Grounding Cable to the Protective Earthing Terminal in the Front of the Left Panel on the QFX5120-48YM Mounted on Two Posts Grounding wire installation on rack-mounted network switch highlighting screws and grounding connection.
  4. Secure the grounding lug to the protective earthing terminal with the screws.
  5. Dress the grounding cable and ensure that it does not touch or block access to other switch components.
Warning:

Ensure that the cable does not drape where people could trip over it.

Connect Power to an AC-Powered QFX5120 Switch

To connect power to an AC-powered QFX5120 switch:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to a site ESD point.

  2. Ensure that the power supplies are fully inserted in the chassis.

  3. Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your geographical location.

    Warning:

    Ensure that the power cord does not block access to device components or drape where people can trip on it.

  4. Connect the power cord.

    • For QFX5120-32C, QFX5120-48T, and QFX5120-48Y switches:

      1. Push the end of the retainer strip into the hole next to the inlet on the power supply faceplate until it snaps into place. Ensure that the loop in the retainer strip faces the power cord.

      2. 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 coupler into the inlet.

      3. Insert the power cord coupler firmly into the inlet.

      4. Slide the loop toward the power supply until it is snug against the base of the coupler.

      5. Press the tab on the loop and draw out the loop into a tight circle (see Figure 16 and Figure 17).

        Figure 16: Connect Power Cord to an AC-Powered QFX5120-32C Switch Securing a power cable to a power supply unit in two steps: insert cable into socket and secure with clip.
        Figure 17: Connect Power Cord to an AC-Powered QFX5120-48T or QFX5120-48Y Switch Securing a power cable in a power supply unit with green arrows showing insertion and clip closing steps.

    • For QFX5120-48YM switches:

      1. Gently lift the retainer clip up.

      2. Insert the power cord coupler firmly into the inlet.

      3. Push the retainer clip down until it is snug against the base of the coupler (see Figure 18).

        Figure 18: Connect Power to an AC-Powered QFX5120-48YM Switch Two-step process for PSU removal and insertion; left panel shows PSU being removed with an upward handle, right panel shows PSU being inserted with a downward handle. Airflow direction labeled 'AIR OUT'.
  5. If the AC power source outlet has a power switch, set it to the off position.
    Note: The QFX5120 switch powers on as soon as power is provided to the power supply. QFX5120 does not have a power switch.
  6. Insert the power cord plug into an AC power source outlet.
  7. If the AC power source outlet has a power switch, set it to the on position.

    • If you are connecting the power supply in a QFX5120-32C switch, verify that the LED on the power supply is lit green. If the LED is lit or blinking red, disconnect the power supply from the power source, and replace the power supply (see Maintain the QFX5120 Power System).

    • If you are connecting the power supply in a QFX5120-48T, QFX5120-48Y, or QFX5120-48YM switch, verify that the AC and DC LEDs on the power supply are lit green. If the fault LED (!) is lit, disconnect the power supply from the power source, and replace the power supply (see Maintain the QFX5120 Power System).
      CAUTION:

      Do not remove the power supply until you have a replacement power supply ready: you must install the replacement power supply within one minute after removing the failed power supply to ensure proper airflow and prevent chassis overheating.