Mounting a QFX3008-I Interconnect Device on a Rack or Cabinet Using a Mechanical Lift

 

The QFX3008-I Interconnect device ships installed with front-mounting brackets and center-mounting brackets on the chassis for mounting the device on a 19-in. equipment rack or cabinet. (The remainder of this topic uses “rack” to mean “rack or cabinet.”) The chassis also comes with mounting shelves and brackets to support it in the rack.

Because of the chassis size and weight, we require using a mechanical lift to install the device.

Caution

Before mounting the device in a rack, have a qualified technician verify that the rack is strong enough to support the device’s weight and is adequately supported at the installation site.

Note

In a rack, the chassis occupies 21 U. You can mount two devices on a 42 U rack provided that the racks meet the strength requirements to support the combined weight of the devices. If you are mounting two devices on a rack, mount the first device on the bottom of the rack.

Before mounting a QFX3008-I Interconnect device in a rack:

  1. Verify that the site meets the requirements described in Site Preparation Checklist for a QFX3008-I Interconnect Device.
  2. Place the rack in its permanent location, allowing adequate clearance for airflow and maintenance, and secure it to the building structure. SeeClearance Requirements for Airflow and Hardware Maintenance for a QFX3008-I Interconnect Device for detailed information.
  3. Read General Safety Guidelines and Warnings, with particular attention to Chassis Lifting Guidelines for a QFX3008-I Interconnect Device.
  4. Unpack the device as described in Unpacking a QFX3008-I Interconnect Device.
  5. In a four-post rack, install the mounting hardware at the desired position as described in Installing QFX3008-I Interconnect Device Mounting Hardware on Four-Post Racks or Cabinets. In a two-post rack, install the mounting hardware at the desired position as described in Installing QFX3008-I Interconnect Device Mounting Hardware on Two-Post Racks.

Before you begin, ensure that you have the following parts and tools available to mount the device in a rack:

  • A mechanical lift with a load capacity of at least 750 lb (341 kg). If you do not have a lift rated for 750 lb (341 kg), you must remove all components from the chassis and use a lift rated for at least 250 lb (114 kg). The weight of an empty QFX3008-I Interconnect device and midplane is approximately 205 lb (93 kg).

  • Phillips (+) screwdriver, number 2 or number 3, depending on the size of your rack mounting screws, for mounting the device in a rack (not provided)

  • Mounting screws appropriate for your rack (not provided)

  • Rear support anchors to secure the chassis to the four-post mounting shelf and rear support bracket (provided)

    Note

    Earlier versions of the four-post rack mounting hardware did not require the rear support anchors. If your four-post rack mounting hardware includes spacer bars and two shelves the rear support anchors are not required.

  • Four screws, two UNC 1/4-20 (right side) screws and two M6 (left side) screws, to secure the rear support anchors to the chassis (provided)

To mount the QFX3008-I Interconnect device in a rack using a mechanical lift (see Figure 1 and Figure 2):

  1. Load the device onto the lift, making sure it rests securely on the lift platform.
  2. Using the lift, position the device in front of the rack, centering it in front of the mounting shelves installed in the rack.
  3. Lift the chassis approximately 0.75 in. (1.9 cm) above the surface of the mounting shelves. Position the chassis in the rack as close as possible to resting on the support that the mounting shelves provide.
  4. In a four-post rack, carefully slide the device onto the mounting shelves until the front-mounting brackets (“ears”) attached to the chassis contact the rack rails. The handles on the side of the chassis can be used to help position the Interconnect device in the rack.

    In a two-post rack, carefully slide the device onto the mounting shelves until the center-mounting brackets (“ears”) attached to the chassis contact the rack rails. The handles on the side of the chassis can be used to help position the QFX3008-I Interconnect device in the rack.

    Figure 1: Installing a QFX3008-I Interconnect Device in a Four-Post Rack
    Installing a QFX3008-I
Interconnect Device in a Four-Post Rack
  5. Move the lift away from the rack.
  6. Ensure the mounting brackets are flush with the front of the rack.
  7. Install a mounting screw into each of the open front-mounting holes aligned with the rack, starting from the bottom.
  8. Visually inspect the alignment of the device. If the device is installed properly in the rack, all the mounting screws on one side of the rack are aligned with the mounting screws on the opposite side, and the device is level.
  9. After ensuring that the device is aligned properly, tighten the screws.
  10. In a four-post rack, hook the rear support anchors around the bottom rear flange of the mounting shelf so that its holes line up with the grounding lug screw holes at the bottom left and right corner of the chassis rear.Note

    Earlier versions of the four-post rack mounting hardware did not require the rear support anchors. If your four-post rack mounting hardware includes spacer bars and two shelves the rear support anchors are not required.

  11. Secure the rear support anchors with the provided UNC 1/4-20 (right side) screws and M6 (left side) screws.Tip

    Because the rear support anchors are attached to the chassis grounding points, it is best to connect the chassis to earth ground while performing this step. See Connecting Earth Ground to a QFX3008-I Interconnect Device for more information.

    Figure 2: Attaching Rear Support Anchors to the QFX3008-I Chassis in a Four-Post Rack
    Attaching Rear
Support Anchors to the QFX3008-I Chassis in a Four-Post Rack