You can install the
switch in the following types of cabinets and racks, assuming an external
ambient air temperature range of 0 to 104°F (0 to 40°C):
cabinets with a roof fan tray (bottom to top cooling)
If you are selecting
an enclosed cabinet, we recommend one of the thermally validated types, either
standard perforated or solid-walled with a fan tray.
We do not recommend
that you use racks that have obstructions (such as power strips), because the
obstructions could impair access to field-replaceable units (FRUs).
for Cabinets and Racks
The cabinet or rack
must also meet the following requirements:
Standard 19-inch (48.3 cm) (four-post EIA cabinet or rack, with mounting rails that conform to English universal hole spacing per section 1 of ANSI/EIA-310-D-1992). For more information, see Requirements Specific to Perforated Cabinets.
The minimum vertical rack space requirement per chassis is one RU (rack unit), equal to 1.75 inches (4.4 cm).
The width between
the rack-mounting rails must be at least 17.75 inches (45.0 cm) if the rear of
the device is not attached to the rack. For four-post EIA racks, this
measurement is the distance between the two front rails.
Four-post EIA cabinets
(perforated or solid-walled) must meet the following requirements:
spacing for the bend radius for fiber-optic cables should have the
front-mounting rails of the cabinet offset from the front door by a minimum of
3 inches (7.6 cm).
between the outside face of the front mounting rail and the outside face of the
back mounting rail should be 23.0 to 30.0 inches (58.4 to 76.2 cm) to allow for
Specific to Standard Open Racks
If you are mounting
the chassis in an open rack (no side panels or doors), ensure that the rack
meets the following requirements:
The minimum vertical rack space per chassis must be one rack unit (RU), equal to 1.75 inches (4.4 cm).
between the chassis air vents and any walls should be 2.5 inches (6.4 cm).
Specific to Perforated Cabinets
A perforated cabinet
has perforations in its front and rear doors and side walls. Perforated
cabinets must meet the following requirements:
The front and rear
doors must have at least a 60 percent open area perforation pattern, with at
least 15 square inches (96.8 square cm) of open area per rack unit of door
The roof should be
perforated with at least a 20 percent open area.
The cabinet floor
should be open or perforated to enhance cooling.
The Cisco R Series
rack conforms to these requirements.
Cable Management Guidelines
To help with cable management, you might want to allow additional space in the rack above and below the chassis to make it easier to route all of the fiber optic or copper cables through the rack.