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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.