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Mounting a QFX3600 or QFX3600-I Device on Four Posts in a Rack or Cabinet

Before you begin mounting a QFX3600 or QFX3600-I device on the rack or cabinet:

Ensure that you have the following parts and tools available to mount the device on four posts in a rack:

  • ESD grounding strap (provided).

  • One pair of mounting brackets (part number 540-038596) (provided).

  • One pair of rear installation blades (part number 540-038598). These installation blades support the rear of the chassis, and must be installed (provided).

  • 6 Phillips 4x5-mm flat-head mounting screws (provided).

  • Eight screws to secure the chassis and rear installation blades to the rack (not provided).

  • Appropriate screwdriver for the mounting screws (not provided).

You can front-mount or rear-mount a QFX3600 or QFX3600-I device on four posts in a 19-in. rack or cabinet by using the mounting brackets and installation blades provided with the device. (The remainder of this topic uses “rack” to mean “rack or cabinet.”) The front and rear rack rails must be spaced between 19.3 in. (49 cm) and 36 in. (91.4 cm) front to back.

You can also mount the device on two posts of a 19-in. rack or cabinet by using the mounting brackets provided with the device. See Mounting a QFX3600 or QFX3600-I Device on Two Posts in a Rack or Cabinet.

The holes in the mounting brackets and installation blades are placed at 1 U (1.75 in., or 4.45 cm.) apart so that the device can be mounted in any rack that provides holes spaced at that distance.

Warning:

QFX3600 and QFX3600-I devices must be supported at all four corners. Mounting the chassis using only the front brackets damages the chassis and can result in serious bodily injury.

CAUTION:

If you are installing the QFX3600 or QFX3600-I device above 60 in. (152.4 cm) from the floor, you must remove the power supplies and fan trays before attempting to install the device, or ask someone to assist you during the installation.

CAUTION:

If you are mounting multiple devices on a rack, mount the device in the lowest position of the rack first, and proceed to mount the rest of the devices from bottom to top.

To mount the device on four posts in a rack:

  1. Attach the ESD grounding strap to your bare wrist and to a site ESD point.
  2. Decide where to position the device in the rack.
  3. Install the rear installation blades. See Figure 1.

    1. With two mounting screws—and cage nuts and washers if your rack requires them—attach one of the rear installation blades to the left rear of the rack at the point where you want to mount the device. Tighten the screws.

    2. Position the second rear installation blade at the desired position in the right rear of the rack, so that it is on the same rack level as the left rear installation blade. If the right and left rear installation blades are not on the same level, the chassis will rest at an angle in the rack instead of resting flat and level.

    3. With two mounting screws—and cage nuts and washers if your rack requires them—attach the second rear installation blade to the right rear of the rack at the point where you want to mount the device. Tighten the screws.

    Figure 1: Attaching the Installation Blades to the Rear of the RackAttaching the Installation Blades to the Rear of the Rack
  4. Prepare the device for mounting.

    1. Place the device on a flat, stable surface.

    2. Align the mounting brackets along the front or rear of the side panels of the device chassis depending on how you want to mount the device. For example, if you want to front-mount the device, align the brackets along the front of the side panel such that the mounting ears are in the front of the device chassis. See Figure 2.

    3. Align the holes in the mounting brackets with holes on the side panels of the device chassis.

    4. Insert mounting screws into the aligned holes. Tighten the screws.

  5. Mount the device.

    1. Grasp both sides of the device, lift it, and position it in the rack so that the rear of the chassis slides onto the installation blade. See Figure 2.

      Tip:

      If someone is assisting you, have one person stand at the rear of the rack where the installation blade is installed, to help guide the device onto the installation blade.

    2. Align the holes in the front brackets on the chassis with the holes in the rack. Ensure that the chassis is level.

    3. With four mounting screws—and cage nuts and washers if your rack requires them—secure the front of the device to the rack. Tighten the screws.

    4. Ensure that the device chassis is level by verifying that all screws on one side of the rack are aligned with the screws on the other side.

Figure 2: Mounting the Device on Four PostsMounting the Device on Four Posts

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