Preparing for Installation 2-7
Site Requirements Guidelines
Site Requirements Guidelines
Before installing the Cisco 12008 router, review the guidelines presented in the following
sections.
Rack-Mounting Guidelines
Before installing the Cisco 12008 in a telco-style or 19-inch equipment rack, consider the
following rack-mounting guidelines:
•Install the router in an enclosed rack only if the rack has adequate ventilation or an
exhaust fan; install the router in an open rack whenever possible.
•An enclosed rack with a ventilation system that is too powerful can prevent proper
cooling of the router by creating negative air pressure around the router and redirecting
air away from the intake of the air filter assembly. If necessary, operate the router with
the rack door open.
•The proper use of baffles inside an enclosed rack can help ensure adequate router
cooling.
•Equipment placed in the rack beneath the router can generate heat that is drawn into the
router’s air filter assembly, adding to the router’s heat load.
If the enclosed rack in which you install the router does not have a ventilation fan, you
should install one.
The rack-mounting hardware included with the Cisco12008 is suitable for most 19-inch
equipment racks or telco-style racks. We strongly recommend a rack-mount installation for
your router, due to size and weight considerations.
The specific rack-mounting guidelines for your router follow:
•Keep the center of gravity of the equipment rack as low as possible.
Mount the router in the rack as low as possible without sacrificing router utility,
accessibility, or serviceability.