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Part 1: Mount the Switch

 

You can mount the switch on four posts of a 19-in. rack or cabinet. A fully loaded AC-powered switch weighs approximately 157.4 lb (71.4 kg) and a fully loaded DC-powered switch weighs approximately 163.4 lb (74.1 kg). You must use material-handling systems (such as levers, slings, lifts, and so on) to lift any equipment that weighs above 121.2 lb (55 kg). When this is not practical, you must use specially trained persons (such as riggers or movers) to lift the switch. Mounting an EX9253 switch requires one person to guide the switch in place and a second person to install the mounting screws to secure the switch to the rack if you are using material-handling systems or two people to lift the switch and a third person to install the mounting screws to secure the switch to the rack if you are using specially trained persons.

The fan trays and power supplies are hot-removable and hot-insertable field-replaceable units installed in the rear panel of the switch. You can replace them without powering off the switch or disrupting switch functions. In a switch powered by AC power supplies, a minimum of two high line power supplies or three low line must be installed in the switch for non-redundant operation. To ensure proper operation of the switch, you must install a replacement power supply shortly after removing a power supply from the chassis. To maintain proper cooling, you must install a replacement fan tray or a blank panel in the fan tray slot shortly after removing a fan tray from the chassis.

Caution

Do not mix AC and DC power supplies in the same switch.

Warning

Ensure that you understand how to prevent ESD damage. Wrap and fasten one end of an ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.

Note

Have a qualified technician verify that the rack is strong enough to support the switch’s weight.

Ensure that the rack is in its permanent location, allowing adequate clearance for airflow and maintenance, and secured to the building structure.

When mounting multiple units on a rack, mount the heaviest unit at the bottom and mount the other units from the bottom to the top in decreasing order of weight.

  1. Position the switch in front of the four-post rack or cabinet.Note

    The rear mounting brackets on either side of the chassis are movable; you can adjust the brackets according to the depth of the rack. However, the front mounting brackets on either side of the chassis are fixed to the chassis.

  2. Remove the screw on either side of the chassis that holds the rear mounting brackets by using a Phillips (+), number 2 screwdriver, and slide the brackets out of the chassis (see Figure 1). Save the brackets.
    Figure 1: Removing the Rear Mounting Brackets
    Removing
the Rear Mounting Brackets
  3. Position the cable management brackets on each side of the front of the chassis. Attach the brackets to the chassis by using the screws provided with the brackets (see Figure 2).
    Figure 2: Installing the Cable Management Brackets
    Installing the Cable Management Brackets
  4. Lift the switch by using material-handling systems (such as levers, slings, lifts, and so on). If that is not practical, have a specially trained person hold on to the bottom of the chassis on each side and carefully lift it. The front mounting brackets must contact the rack rails and the holes on the front mounting brackets must align with the threaded holes on the rack. Align the bottom hole in each front mounting bracket with a hole in each post of the rack, making sure that the chassis is level.
  5. Have another person secure the switch to the rack by inserting the screws appropriate for your rack through the holes in the bracket and the threaded holes on the rack (see Figure 3). Tighten the screws.
    Figure 3: Inserting the Screws Through the Front Mounting Brackets
    Inserting the Screws Through the Front Mounting Brackets
  6. On the rear of the chassis, slide the rear mounting brackets on either side of the chassis until the rear mounting brackets contact the rack rails (see Figure 4).
    Figure 4: Sliding the Rear Mounting Brackets
    Sliding
the Rear Mounting Brackets
  7. Install mounting screws into each of the open rear mounting holes aligned with the rack, starting from the bottom, and secure them tightly.
  8. Visually inspect the alignment of the chassis. If the chassis 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 switch is level.
  9. (Optional) Ensure that the air filter is right-side up.
  10. (Optional) Grasp the air filter and slide into the rails on the cable management brackets until it fits snugly on the cable management brackets (see Figure 5).
    Figure 5: Installing the Air Filter
    Installing the
Air Filter
  11. Tighten the captive screws to secure the air filter.