Site Environment; Preventive Site Configuration; Configuring Equipment Racks; Power Supply Considerations - Cisco 2600 Series Hardware Installation Manual

General Site Requirements

Site Environment

The router can be placed on a desktop or mounted in a rack. Single rack-unit (1RU) routers can also be
mounted on a wall. The location of the chassis and the layout of your equipment rack or wiring room are
extremely important for proper system operation. Placing equipment too close together, inadequate
ventilation, and inaccessible panels can make system maintenance difficult or cause system
malfunctions and shutdowns.
When planning your site layout and equipment locations, remember the precautions described in the next
section,
with your existing equipment, these precautions might help you isolate the cause of failures and prevent
future problems.

Preventive Site Configuration

The following precautions will help you plan an acceptable operating environment for your router and
help you avoid environmentally-caused equipment failures:
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Configuring Equipment Racks

The following information will help you plan an acceptable equipment rack configuration:
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Power Supply Considerations

Check the power at your site to ensure that you are receiving "clean" power (free of spikes and noise).
Install a power conditioner if necessary.
Cisco 2600 Series Routers Hardware Installation Guide
2-4
"Preventive Site Configuration." If you are experiencing shutdowns or unusually high errors
Ensure that the room in which you operate your system has adequate air circulation. Electrical
equipment generates heat. Ambient air temperature might not be able to cool equipment to
acceptable operating temperatures without adequate circulation.
Always follow the ESD-prevention procedures described in the
Damage" section on page 23
immediate or intermittent equipment failure.
Ensure that the chassis cover is secure. The chassis is designed to allow cooling air to flow
effectively inside it. An open chassis allows air leaks, which might interrupt and redirect the flow
of cooling air from internal components.
Enclosed racks must have adequate ventilation. Ensure that the rack is not overly congested because
each unit generates heat. An enclosed rack should have louvered sides and a fan to provide cooling
air.
When mounting a chassis in an open rack, ensure that the rack frame does not block the intake or
the exhaust ports. If the chassis is installed on slides, check the position of the chassis when it is
seated all the way into the rack.
In an enclosed rack with a ventilation fan in the top, excessive heat generated by equipment near the
bottom of the rack can be drawn upward and into the intake ports of the equipment above it in the
rack. Ensure that you provide adequate ventilation for equipment at the bottom of the rack.
Baffles can help to isolate exhaust air from intake air, which also helps to draw cooling air through
the chassis. The best placement of the baffles depends on the airflow patterns in the rack, which can
be found by experimenting with different arrangements.
to avoid damage to equipment. Damage from static discharge can cause
Chapter 2 Preparing to Install the Router
"Preventing Electrostatic Discharge
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