Cisco Systems 7500 Series manual Equipment Rack-Mounting Guidelines

Chapter 2 Preparing for Installation

Equipment Rack-Mounting Guidelines

Figure 2-9 Airflow Through the Cisco 7513, Cisco 7513-MX, and Cisco 7576

System blower
Card cage
Intake air	Exhaust air
Power supplies
	H3093

The power supplies have their own fans with airflow that is independent of the chassis airflow. Ensure that there is minimum front and back clearance of 6 inches (15.24 cm).

Equipment Rack-Mounting Guidelines

This section provides the equipment rack-mounting guidelines that must be observed before installing a Cisco 7500 series router in an equipment rack.

General Equipment Rack Ventilation Considerations

If you plan to install the router in an equipment rack, you can avoid overtemperature conditions by observing the following precautions:

•There must be at least 2 inches (5.08 cm) of clearance between each side of the chassis and the side (or inner wall) of an enclosed rack.

•Enclosed racks must have adequate ventilation or an exhaust fan; use an open rack whenever possible.

•A ventilation system that is too powerful in a closed rack can also prevent cooling by creating negative pressure around the chassis and redirecting the air away from the inlet vents. If necessary, operate the chassis with the rack open.

•The correct use of baffles in an enclosed rack can help to ensure that cool air reaches the chassis.

Cisco 7500 Series Installation and Configuration Guide

OL-5008-03 B0 2-15