Attaching The Bottom-Support Rails On The Rack - Cisco MDS 9396T Installing

Installing the Cisco MDS 9396T Switch

Attaching the Bottom-Support Rails on the Rack

The switch chassis that you are installing ships with two adjustable bottom-support rails that you can attach
to a four-post rack to hold the chassis. Each of these bottom-support rails has two pieces—one that slides into
the other so that you can adjust them to fit racks with front and rear mounting posts that are spaced less than
36 inches (91 cm). On each bottom-support rail, the rail half that slides into the other rail includes a chassis
stop that fits into the module end of the chassis. With the air intake on the port side of the chassis, you must
position the bottom-support rail piece with the chassis stop on the hot aisle side of the rack.
Before you begin
• Verify that a four-post rack or cabinet is installed.
• If any other devices are stored in the rack or cabinet, verify that the heavier devices are installed below
• Verify that the bottom-support rails kit is included in the switch accessory kit.
• Verify that you have 8 screws for attaching the bottom-support rails to the racks (typicallyM6 x 10 mm
Step 1 Look at the fan trays and power supplies installed in the chassis to determine how you must position the bottom-support
rails on the rack.
• If the modules have burgundy coloring (port-side-intake airflow), you must position the bottom-support rails so that
their chassis stops are positioned in the hot aisle.
• If the modules have blue coloring (port-side-exhaust airflow), you must position the bottom-support rails so that
their chassis stops are positioned in the cold aisle.
Step 2 Separate the two sliders that make up one bottom-support rail, and position the half with the chassis stop in the hot aisle
of the rack. Make sure there is at least 2 RU open above the bottom-support rails so that you can easily install the chassis.
Step 3 Use two customer-supplied screws (typically M6 x 10 mm screws) to attach the bottom-support rail half to the vertical
mounting rails on the rack post. Tighten each screw to the appropriate torque setting for the screws (for M6 screws, use
40 in-lb [4.5 N·m] of torque).
Step 4 Slide the other half of the bottom-support rail onto the attached half of the rail set and use two customer supplied screws
(typically M6 x 10 mm screws) to secure that portion to the vertical mounting rails on the rack. Tighten each screw to
the appropriate torque setting for the screws (for M6 x 10 mm screws, use 40 in-lb [4.5 N·m] of torque).
Step 5
Repeat Steps 2 and 3 to attach the other expanding bottom-support rails to the other side of the rack.
Step 6 Check the two installed bottom support rails to be sure that both rails are level and level with each other. If they are not
level, adjust the higher rail down to the level of the lower rail.
What to do next
You are ready to install two front-mount brackets on the chassis.
lighter devices and that there is at least 2 RU open to install the switch.
screws or the screws appropriate for the vertical mounting rails on the rack.
Attaching the Bottom-Support Rails on the Rack
Installing the Cisco MDS 9396T Switch
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