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Cisco 3600 Series Routers Hardware Installation Guide
OL-2056-05
Chapter 2 Preparing to Install the Router
General Site Requirements
Site Environment
All Cisco 3600 series routers can be placed on a desktop or mounted in a rack. The Cisco 3620 and
Cisco 3640 routers can also be installed on a wall. The location of your router and the layout of your
equipment rack or wiring room are extremely important for proper operation. Equipment placed too
close together, inadequate ventilation, and inaccessible panels can cause malfunctions and shutdowns,
and can make maintenance difficult. Plan for access to both front and rear panels of the router.
When planning your site layout and equipment locations, remember the precautions described in the next
section, “Site Configuration” to help avoid equipment failures and reduce the possibility of
environmentally caused shutdowns. If you are currently experiencing shutdowns or unusually high errors
with your existing equipment, these precautions may help you isolate the cause of the failures and
prevent future problems.
Site Configuration
The following precautions will help you plan an acceptable operating environment for your router and
will help you avoid environmentally caused equipment failures:
• Ensure that the room where your router operates has adequate circulation. Electrical equipment
generates heat. Without adequate circulation, ambient air temperature may not cool equipment to
acceptable operating temperatures.
• Always follow ESD-prevention procedures described in the “Preventing Electrostatic Discharge
Damage” section on page 2-2 to avoid damage to equipment. Damage from static discharge can
cause immediate or intermittent equipment failure.
• Ensure that the chassis cover or mainboard tray and module rear panels are secure. All empty
network module slots, WAN interface card slots, and power supply bays (in the Cisco 3660 router)
must have filler panels installed. The chassis is designed to allow cooling air to flow within it,
through specially designed cooling slots. A chassis with uncovered openings will create air leaks,
which may interrupt and reduce the flow of air across internal components.