Juniper QFX5220, Hardware Manual, Page: 115 / 247

Four-Post Installation Procedure for QFX5220-128C
To mount the QFX5220-128C on a four-post rack using the provided rack mount kit:
1. Attach the ESD grounding strap to your bare wrist and to a site ESD point.
2. Decide whether the field replaceable unit (FRU) end of the switch or the port end is to be placed at
the front of the rack. Position the device in such a manner that the AIR IN labels on components are
next to the cold aisle and AIR OUT labels on components are next to the hot aisle.
3. Align the holes in the flange with the holes closest to the port panel. See Figure 31 on page 118 .
Figure 31: Attaching the Flange to the QFX5220-128C Chassis
QFX5220-128C
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4. Use the Phillips number 2 screwdriver to attach the flange to the chassis using two M4 x 6 mm flathead
screws in the top and bottom holes. Tighten the screws.
5. Repeat Step 3 and Step 4 and attach the second flange to the opposite side of the chassis.
6. Align the holes in the left mounting rail with the holes on the side of the chassis and in the flange. See
Figure 32 on page 119 to see the proper alignment for the QFX5220-128C.
NOTE: There is a left mounting rail, stamped LEFT, and a right mounting rail, stamped RIGHT.
The mounting rails are not interchangable.
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