Cisco Systems MDS 9200 Series manual Requirements Specific to Solid-Walled Cabinets

Appendix A Cabinet and Rack Installation

Cabinet and Rack Requirements

Se n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a ck - d o c @ c i s c o . c o m

Requirements Specific to Solid-Walled Cabinets

A solid-walled cabinet is defined here as a cabinet with solid front and rear doors and solid side walls. In addition to the requirements listed in the “General Requirements for Cabinets and Racks” section on page A-1, solid-walled cabinets must meet the following requirements:

•A roof-mounted fan tray and an air cooling scheme in which the fan tray pulls air in at the bottom of the cabinet and exhausts it out the top, with a minimum of 500 cfm of airflow exiting the cabinet roof through the fan tray.

•Nonperforated (solid and sealed) front and back doors and side panels so that air travels predictably from bottom to top.

•A recommended cabinet depth of 36 to 42 in.(91.4 to 106.7 cm) to allow the doors to close and for adequate airflow.

•A minimum of 150 sq. in. (968 sq. cm) of open area at the floor air intake of the cabinet.

•The lowest piece of equipment should be installed a minimum of 1.75 in. (4.4 cm) above the floor openings to prevent blocking the floor intake.

Requirements Specific to Standard Open Racks

In addition to the requirements listed in the “General Requirements for Cabinets and Racks” section on page A-1, if mounting the chassis in an open rack (no side panels or doors), ensure that the rack meets the following requirements:

•The minimum width between two front mounting rails must be 17.75 in. (45.1 cm).

•The minimum vertical rack space per chassis must be three RU (rack unit), equal to 5.25 in. (13.3 cm).

•The distance between the outside face of the front mounting rail and the outside face of the back mounting rail should be 23.5 to 34.0 in. (59.7 to 86.4 cm) to allow for rear bracket installation.

•The horizontal distance between the chassis and any adjacent chassis should be 6 in.(15.2 cm), and the distance between the chassis air vents and any walls should be 2.5 in. (6.4 cm).

Requirements Specific to telco Racks

In addition to the requirements listed in the “General Requirements for Cabinets and Racks” section on page A-1, telco racks should meet the following requirements:

•The width of the rack between the two rack-mounting rails should be at least 17.75 in. (45.1 cm).

•The distance between the chassis air vents and any walls should be 2.5 in. (6.4 cm).

Cisco MDS 9200 Series Hardware Installation Guide

OL-17468-02 A-3