Replacing a Rack-Mounted Chassis
•If there is sufficient space available in the same rack (or an adjacent rack) to install the replacement (empty) chassis before you remove the existing system, you can minimize downtime and avoid having to disconnect network interface cables by leaving the existing system operating while you install the replacement chassis in the rack. Just ensure that both chassis, when installed, will be close enough to avoid straining cables connected to the interface processors. If this option is possible, proceed to the section “Adding a New Chassis to the Rack.”
•If sufficient rack space is not available to install both chassis (if you must remove the existing system from the rack to make room for the replacement chassis), you will have to disconnect all network interface cables and remove the power supplies before removing the existing system from the rack. Be sure to label the interface cables to avoid crossing them when you reconnect them to the interface ports. As you disconnect cables from the interface processors, complete the configuration worksheet provided at the end of this document to help you reconnect the cables to the correct ports. (For the Cisco 7000, refer to Figure 17, and for the Cisco 7507, refer to Figure 18.)
•If the existing system is installed in an enclosed rack, or if a power strip or other rack fixture blocks access to the power supply bays, you may have to remove the existing system with the power supplies intact and then install them in the replacement chassis before you install that chassis in the rack. If you must choose this method, ensure that you have sufficient assistance to lift and support the chassis and the rack. The chassis weights over 100 pounds with two power supplies installed, and the rear of the chassis is heaviest.
Note Be sure that you have sufficient help (assistants) to lift and support the chassis and the rack when performing these procedures. The empty replacement chassis weights 75 pounds. A fully configured chassis weighs 145 pounds. Whenever possible, remove all power supplies before moving or lifting the chassis.
Warning Two people are required to lift the chassis. Grasp the chassis underneath the lower edge and lift with both hands. To prevent injury, keep your back straight and lift with your legs, not your back. To prevent damage to the chassis and components, never attempt to lift the chassis with the handles on the power supplies or on the interface processors, or by the plastic panels on the front of the chassis. These handles were not designed to support the weight of the chassis. (For translations of this safety warning, refer to the section “Chassis Lifting Warning” on page 39.)
