Cisco 2901-2811 Rack Mount Kit ACS-2901-RM-19. For rack installation of Cisco 2901-2811 in 19 inches rack, the rack kit includes screws.
Cisco 2900 series and 3900 series routers can be installed in 19-inch (48.26-cm) EIA and 23-inch (58.42-cm) Southwestern Bell Corporation (SBC) racks. The Cisco 3900 series routers can also be mounted in a 600-mm ETSI rack. Use the standard brackets shipped with the router for mounting the chassis in a 19-inch EIA rack; you can order optional larger brackets for mounting the chassis in a 19-inch SBC rack.
For the Cisco 2900 series routers use four of the supplied number-8 Phillips flat-head screws to attach the long side of each bracket to the router. For the Cisco 3900 series routers use four of the supplied number-6 Phillips flat-head screws to attach the long side of each bracket to the router.
Bracket Installation for Back Mounting shows how to attach the brackets to the sides of the router with the back panel forward.
Bracket Installation for Center Mounting shows how to attach the brackets to the sides of the router with center mounting.
If you are planning to rack-mount the router, do so before making network and power connections. If you need to install network modules or interface cards, you can do so either before or after rack-mounting the router. Ideally, you would install modules and interface cards when you have the best access to the rear panel of the router. Internal modules, such as advanced integration modules (AIMs) or packet voice data modules (PVDMs), should be installed prior to rack-mounting.
Cisco 2811, Cisco 2821, and Cisco 2851 routers can be installed in 19 (48.26-cm)- and 23-inch (58.42-cm) racks. Cisco 2801 routers can be installed only in 19-inch racks, and cannot be center mounted. Use the standard brackets shipped with the router for mounting the chassis in a 19-inch rack; you can order optional larger brackets for mounting the chassis in a 23-inch rack.
Note Brackets for 23-inch (58.42-cm) equipment racks are not available for Cisco 2801 routers.
You can mount the router in the following ways:
•Center mounting—Brackets attached in the center of the chassis with only the front panel facing forward. (This option is not available on Cisco 2801 routers.)
•Front mounting—Brackets attached at the front of the chassis with the front panel facing forward.
•Rear mounting—Brackets attached at the rear of the chassis with the rear panel facing forward.
Figure 6 Rack-Mounting Brackets for Cisco 2811 Routers
Attach the second bracket to the opposite side of the chassis. Use a number 2 Phillips screwdriver to install the bracket screws.
Figure 9 Bracket Installation for Front Mounting
Figure 10 Bracket Installation for Rear Mounting
Figure 11 Bracket Installation for Center Mounting with Front Panel Forward
After you have attached the brackets to the router chassis, use the screws provided with the rack to install the chassis in the rack. (See Figure 12.)
Tip Start the lower pair of screws first, and rest the brackets on the lower screws while you insert the upper pair of screws.
Tip The screw slots in the brackets are spaced to line up with every second pair of screw holes in the rack. When the correct screw holes are used, the small threaded holes in the brackets line up with unused screw holes in the rack. If the small holes do not line up with the rack holes, you must raise or lower the brackets to the next rack hole.
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:
•This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
•When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
•If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006
Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to support the weight of the unit. Statement 1032
Figure 12 Mounting the Chassis in a Rack (Typical)
The optional cable management bracket provides attachment points for organizing and routing cables. On brackets for the Cisco 2801 and Cisco 2811 routers, attach the cable management bracket to the left or right rack-mount bracket using the screw provided, as shown in Figure 13 and Figure 14. On brackets for 2-rack-unit-high Cisco 2821 and Cisco 2851 routers, you can attach the cable management bracket to either the upper or lower threaded hole on either the left or right rack-mount brackets using the
Figure 14 Attaching the Optional Cable Management Bracket to a Cisco 2811, 2821, or 2851 Router
After the router is installed, you must connect the chassis to a reliable earth ground. For the chassis ground connection procedures, see the "Installing the Chassis Ground Connection" section.