Chapter 2 Preparing for Installation
Equipment Rack-Mounting Guidelines
•Equipment near the bottom of a rack can generate excessive heat that is drawn upward and into the inlet ports of equipment above, leading to overtemperature conditions in devices at or near the top of the rack.
In addition, the following sections contain specific rack-mounting guidelines for the Cisco 7500 series routers:
•Cisco 7505 Rack-Mount Considerations, page 2-16
•Cisco 7507 and Cisco 7507-MXRack-Mount Considerations, page 2-18
•Cisco 7513, Cisco 7513-MX, and Cisco 7576 Rack-Mount Considerations, page 2-20
Cisco 7505 Rack-Mount Considerations
The rack-mounting hardware included with the Cisco 7505 is suitable for most 19-inch (48.26-cm) equipment racks or 2-post racks. The router chassis mounts to two posts or rails in the rack with two mounting ears, which attach to the sides of the chassis. Ideally, you should be able to access both the interface processor and noninterface processor ends of the router without having to remove it from the rack. Before using a particular rack, check for obstructions (such as a power strip) that could impair access to the interface processors or chassis cover panel.
As an alternative, the router can be mounted on an equipment shelf provided that the rack dimensions allow the router to be secured to the shelf, and the overall configuration permits safe installation and access. Figure 2-10shows the chassis footprint and outer dimensions.
To use the rack-mounting hardware provided with the router, consider the following guidelines:
•To mount the router between two posts or rails using the mounting ears, the inner clearance (the width between the inner sides of the two posts or rails) must be at least 17.72 inches (45 cm).
•The height of the chassis is 11 inches (27.94 cm) with the chassis feet attached, and 10.5 inches (26.67 cm) when the chassis feet are removed.
•When mounting the router in four-post or 2-post racks, be sure to use all eight of the screws provided to secure the chassis ears to the rack posts (use four screws per ear). The ears secure one end of the chassis to two rack posts; the rest of the chassis is cantilevered off the posts. Using fewer than all eight screws might not be sufficient to support the weight of the chassis.
•If the rack has a vertical power strip or other obstacle, ensure that there is sufficient clearance to install and remove processor modules, which must be pulled straight out of their slots.
| Cisco 7500 Series Installation and Configuration Guide |
2-16 | OL-5008-03 B0 |
