Rack Requirements for QFX5120 Switches

You can mount QFX5120 switches on a four-post 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association. You can also mount QFX5120-48YM switches on a two-post 19-in. rack.

Table 1 provides the rack requirements and specifications for QFX5120 switches.

Table 1: Rack Requirements and Specifications for QFX5120 Switches

Rack Requirements	Specifications
Type and strength	Use a four-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight. For QFX5120-48YM switches, you can also use a two-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight. A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.
Size, airflow, and clearance requirements	If you are mounting a QFX5120-32C switch, ensure that the rack has a depth of 23.6 in. (60 cm). If you are mounting a QFX5120-48T, QFX5120-48Y, or QFX5120-48YM switch flush with the front posts of a rack, ensure that the distance between the front posts and the rear posts is between 27.5 in. (69.9 cm) and 30.5 in. (77.5 cm). If you are mounting a QFX5120-48T, QFX5120-48Y, or QFX5120-48YM switch in a recessed position from the front posts of a rack, ensure that the distance between the front posts and the rear posts is between 29.5 in. (75 cm) and 32.5 in. (82.6 cm). Ensure that the rack rails are spaced widely enough to accommodate the external dimensions of the switch chassis. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm). Route and dress all cables to minimize the blockage of airflow to and from the chassis. Ensure that the spacing of rails and adjacent racks allows for proper clearance around the switch and rack.
Connection to building structure	Secure the rack to the building structure. If your geographical area is earthquake-prone, secure the rack to the floor. Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.

Rack Requirements

Specifications

Type and strength

Use a four-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.

For QFX5120-48YM switches, you can also use a two-post rack that provides bracket holes or hole patterns spaced at 1-U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.

A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.

Size, airflow, and clearance requirements

If you are mounting a QFX5120-32C switch, ensure that the rack has a depth of 23.6 in. (60 cm).
If you are mounting a QFX5120-48T, QFX5120-48Y, or QFX5120-48YM switch flush with the front posts of a rack, ensure that the distance between the front posts and the rear posts is between 27.5 in. (69.9 cm) and 30.5 in. (77.5 cm).
If you are mounting a QFX5120-48T, QFX5120-48Y, or QFX5120-48YM switch in a recessed position from the front posts of a rack, ensure that the distance between the front posts and the rear posts is between 29.5 in. (75 cm) and 32.5 in. (82.6 cm).
Ensure that the rack rails are spaced widely enough to accommodate the external dimensions of the switch chassis. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm).
Route and dress all cables to minimize the blockage of airflow to and from the chassis.
Ensure that the spacing of rails and adjacent racks allows for proper clearance around the switch and rack.

Connection to building structure

Secure the rack to the building structure.
If your geographical area is earthquake-prone, secure the rack to the floor.
Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.