Attaching The Center-Mount Bottom-Support Rails - Cisco Nexus 7000 Series Hardware Installation And Reference Manual

Installing a Cisco Nexus 7009 Chassis
1 For the heaviest Cisco Nexus 7009 chassis to be installed in the rack,
position two front-mount bottom-support rails at the lowest RU on
the rack.
2 For the next lightest Cisco Nexus 7009 chassis to be installed in the
rack, position two front-mount bottom-support rails immediately above
the first installed chassis.
Step 2
Use a Phillips screwdriver to screw in two or three (three are recommended if you have three screw holes) M6 x 19 mm
or 12-24 x 3/4 in. Phillips screws on the front end of each bracket (using a total of 6 screws for both brackets) as shown
in .
1 Left and right front-mount bottom-support rails positioned at the lowest possible
RU
2 Two sets of two or three M6 x 19 mm Phillips screws ortwo sets of two or three
12-24 x 3/4 in. Phillips screws
Step 3 Align the crossbar to the lower back of the two bottom-support rails and use two M4 x 8 mm screws to attach it to each
rail (one screw for each rail).

Attaching the Center-Mount Bottom-Support Rails

To maximize the stability of the rack, you should install the chassis as low as possible on the rack. Install the
heaviest chassis first at the bottom of the rack. If you install a second chassis in the same rack, install it
immediately above the lower system if there is enough vertical space.
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:
To attach the center-mount bottom-support rails to a two- or four-post EIA rack, follow these steps:
Step 1 Position one of the two center-mount brackets at the lowest possible RU. If you are installing a chassis above another
Cisco Nexus 7009 chassis, position the rail 26.25 inches (66.7 cm) (15 RU) above the center-mount bottom-support rails
for the lower chassis as shown in
• 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. Statement 1006
Figure 19: Positioning the Center-Mounted Bottom-Support Rails, on page
Attaching the Center-Mount Bottom-Support Rails
3 The distance between the bottom-support
rails must be at least 26.25 inches (66.7 cm)
(15 RU) for each Cisco Nexus 7009 chassis.
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
3 Crossbar
4 M4 x 8 mm Phillips screws (2)
46.
45