Cisco Systems Cisco 12008 manual Site Requirements Guidelines, Rack-Mounting Guidelines

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 Cisco 12008 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.

Preparing for Installation 2-7