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Provisioning the Cable Headend
Figure 2-3
23.875 in.
We recommend the rear bracket mounting system for four-post racks because this method enables you
Note
to keep cables from protruding too far out in front of the Cisco uBR7225VXR router, and simultaneously
manage the cables at the front of the chassis with the cable-management bracket.
When planning your rack installation, consider the following information:
•
Install the Cisco uBR7225VXR router in an open rack whenever possible. If installation in an
enclosed rack is unavoidable, ensure that the rack has adequate ventilation.
•
If you plan to use an equipment shelf, ensure that the shelf is constructed to support the weight and
dimensions of the chassis.
designing a customized shelf. We recommend that you use the rack-mount kit for the
Cisco uBR7225VXR router (product number ACS-uBR7225-RMK=).
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 (connecting cables,
or replacing or upgrading components). Otherwise, allow at least 23.25 inches (59.06 cm) of
clearance at the front, and 19 inches (48.3 cm) at the back to remove any of the field-replaceable
units.
Maintain a minimum clearance of 3 inches (7.72 cm) on the right and left of the chassis for the
•
cooling air inlet and exhaust ports, respectively. Avoid placing the Cisco uBR7225VXR router 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.
•
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.
Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
2-16
Cisco uBR7225VXR Router Footprint and Outer Dimensions (View from Top Looking
Down)
17.32 in.
Figure 2-3
shows the chassis footprint, which you will need if you are
Chapter 2
Preparing the Cisco uBR7225VXR Router for Installation
21.875 in.
OL-17309-01
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Troubleshooting
