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Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Chapter 2 Preparing for Installation
Installation Site Requirements
Note
Warm air exhaust at the side of the chassis through the fan tray. Allow sufficient
air flow by maintaining 6 inches (15.24 CM) of clearance at both the inlet and
openings on the chassis.
•
A ventilation system that is too powerful in an enclosed rack can also prevent
cooling by creating negative air pressure around the chassis and redirecting
the air away from the air intake vent. If necessary, operate the router with the
rack door open or in an open rack.
•
The correct use of baffles inside an enclosed rack can assist in cooling the
router.
•
Equipment located near the bottom of the rack can generate excessive heat
that is drawn upward and into the intake ports of equipment above, leading to
possible overheat conditions.
Rack Mounting Clearance
The rack-mounting hardware included with the Cisco 12404 Internet router is
suitable for most 19 inch equipment racks.
The following are rack-mounting guidelines for the Cisco 12404 Internet router.
•
If you use a standard 19 inch racks be sure that the rack is bolted to the floor.
The chassis mounts to the two rack posts, and the rest of the chassis is
cantilevered off of the posts.
•
Ensure that the weight of the Cisco 12404 Internet router does not make the
rack unstable.
•
Some racks are secured to ceiling brackets, if necessary, because of the
weight of the equipment in the rack. Make sure that the rack you are installing
the Cisco 12404 Internet router in is secured.
•
For the enhanced model of the Cisco 12404 Internet router, the mounting
rails on a 4-post rack must be recessed no more than 1.5 inches for the front
door to fully open and close and to provide adequate room for cable routing.
todd.book Page 11 Tuesday, November 27, 2007 6:02 PM
