Attaching Bottom-Support Rails To A Two-Post Rack - Cisco MDS 9700 Series Installing

Installing the Cisco MDS 9700 Series Switches

Attaching Bottom-Support Rails to a Two-Post Rack

The bottom-support rails support the weight of the switch chassis in the rack or cabinet. To maximize the
stability of the rack, you must attach these rails at the lowest possible rack unit (RU).
Note
Before you begin
Before you can install the bottom support rails for the chassis, you must do the following:
• Verify that a two-post rack is installed and secured to the concrete sub floor (see "Installing a Rack or
• If any other devices are stored in the rack or cabinet, verify that they are located below where you plan
• Verify that the two-post bottom-support rails kit was ordered and shipped with the chassis.
Statement 1006
Step 1
Position one of the two bottom-support rails at the lowest possible RU in the rack or cabinet. Be sure there is at least 9
RU of vertical space above the rails to install the chassis.
Step 2
Use a manual Phillips torque screwdriver to attach the bottom-support rail to the rack using four M6 x 19 mm or 12-24
x 3/4 inch screws and tighten each screw to 40 in. lbs (4.5 N.m) of torque.
• M6 screws: 20 in-lb
• 12-24 screws: 30 in-lb
• 10-20 screws: 22 in-lb
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to
ensure that the system remains stable. The following guidelines are provided to ensure your safety:
• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the
heaviest component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the
unit in the rack.
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to install the switch. Also, verify that lighter devices in the same rack are located above where you plan
to install this switch.
Attaching Bottom-Support Rails to a Two-Post Rack
Installing the Cisco MDS 9700 Series Switches
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