Cisco 7200 VXR router User Manual page 81

When planning your rack installation, consider the following guidelines:
•
Install a Cisco 7200 VXR router in an open rack whenever possible. If installation in an
enclosed rack is unavoidable, ensure that the rack has adequate ventilation.
Caution To prevent chassis overheating, never install a Cisco 7200 VXR router in an
enclosed rack or room that is not properly ventilated or air conditioned.
•
If you plan to use an equipment shelf, ensure that the shelf is constructed to support the
weight and dimensions of the chassis. Figure 2-3 shows the chassis footprint, which you
need if you are designing a customized shelf. We recommend that you use the
rack-mount kit designed for Cisco 7200 VXR routers.
•
Allow sufficient clearance around the rack for maintenance. If the rack is mobile, you
can push it back near a wall or cabinet for normal operation and pull it out for
maintenance (installing or moving port adapters, connecting cables, or replacing or
upgrading components). Otherwise, allow 19 inches (48.3 cm) of clearance to remove
Cisco 7200 VXR FRUs.
•
Maintain a minimum clearance of 3 inches (7.62 cm) on the right and left of the chassis
for the cooling air inlet and exhaust ports, respectively. Avoid placing Cisco 7200 VXR
routers in an overly congested rack or directly next to another equipment rack;
otherwise, the heated exhaust air from other equipment can enter the inlet air vents and
cause an overtemperature condition inside the router.
•
Always install heavier equipment in the lower half of a rack to maintain a low center of
gravity and prevent the rack from falling over.
•
If you use telco-type racks, be sure that the rack is bolted to the floor and secured
because in these types of installations only one end of the chassis mounts to the two rack
posts with the brackets. Ensure that the weight of the chassis does not make the rack
unstable.
•
Install and use the cable-management bracket included with Cisco 7200 VXR routers to
keep cables organized and out of the way of the port adapters and I/O controller.
Consider the equipment and cabling that is already installed in the rack. Ensure that
cables from other equipment does not impair access to the port adapters, or require you
to disconnect cables unnecessarily to perform equipment maintenance or upgrades.
Rack-Mounting Guidelines
Preparing for Installation 2-13