Cisco Systems Cisco uBR10012 manual General Rack Installation Guidelines

Chapter 3 Installing the Cisco uBR10012 Router

Preparing the Cisco uBR10012 Router for Rack-Mounting

General Rack Installation Guidelines

When planning your rack installation, consider the following guidelines:

•The Cisco uBR10012 router chassis requires a minimum of 18 rack units (31.5 in. or 80 cm) of vertical rack space. Measure the proposed rack location before mounting the chassis in the rack.

•Before using a particular rack, check for obstructions (such as a power strip) that could impair rack-mount installation. If a power strip does impair a rack-mount installation, remove the power strip before installing the chassis, and then replace it after the chassis is installed.

•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 line cards, connecting cables, or replacing or upgrading components). Otherwise, allow 19 in. (48.3 cm) of clearance to remove FRUs.

•Maintain a minimum clearance of 3 in. (7.62 cm) on the front and back of the chassis for the cooling air inlet and exhaust ports, respectively. Avoid placing the chassis 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.

Caution To prevent chassis overheating, never install a Cisco uBR10012 router in an enclosed rack or room that is not properly ventilated or air conditioned.

•If also installing the optional AC-input power shelf, allow at last two rack units below the

Cisco uBR10012 chassis for the power shelf installation. Install the AC-input power shelf after you have installed the Cisco uBR10012 chassis to avoid the possibility of accidentally crushing the power shelf during the router’s installation.

•Cisco recommends installing an optional equipment shelf in the rack for the Cisco uBR10012 chassis because it simplifies installation, but this is not required.

•Always install heavier equipment in the lower half of a rack to maintain a low center of gravity to prevent the rack from falling over. However, if you are also installing an AC-power shelf, leave enough space for the power shelf plus 2 rack units (RUs) underneath the Cisco uBR10012 chassis.

•Ensure that cables from other equipment already installed in the rack do not impair access to the cards, or require you to disconnect cables unnecessarily to perform equipment maintenance or upgrades.

•Install rack stabilizers (if available) before you mount the chassis.

•Provide an adequate chassis ground (earth) connection for your router chassis.

In addition to the preceding guidelines, review the precautions for avoiding excessive temperature conditions in the “Temperature and Humidity Requirements” section on page 2-6.

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

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