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This chapter describes the general considerations to address while planning for the installation of the Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced router. It does not repeat the specifications in Technical and Environmental Specifications, but you should keep those specifications in mind as you plan for your system.
This chapter includes the following sections:
As you plan for basic site and installation requirements, consider the following:
In addition, make sure that the installation site meets the following access requirements:
When planning the site, you should think about potential expansion of the system. Consider the following:
The following tools are required to install the Cisco CRS 8-Slot Line Card Chassis Enhanced router:
A fully loaded Cisco CRS 8-Slot Line Card Chassis Enhanced router weighs 650 lb (294.8 kg). The chassis is mounted in a four-post rack, as shown in the following figure.
To ensure safe installation and operation of the routing system, you must install the chassis in a four-post equipment rack that meets the specifications described in the Equipment Rack Specifications section.
1 |
Equipment rack |
3 |
Vertical mounting brackets |
2 |
8-slot line card chassis |
4 |
Horizontal mounting brackets |
Warning | The chassis should be mounted on a rack that is permanently affixed to the building. Statement 1049 |
Note | We recommend that you use a scissor lift or similar lifting device to position the chassis in the rack and to hold the chassis in place while you bolt it to the rack. A forklift is not recommended for this purpose . |
As you plan the installation of the chassis into the equipment rack, consider the following:
Note | If you plan to use mounting screws other than the ones shipped with the chassis, you can use 10-32, 10-24, 12-24, or M5 screws. (M6 and 1/4-20 screws do not fit.) |
Caution | Standard rack-mounting screws are not strong enough to secure the chassis to the equipment rack. Use only those mounting screws that are shipped with the chassis or those listed in the Equipment Rack Specifications section. |
For complete instructions on mounting and securing the chassis to a rack, see the Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router Unpacking, Moving, and Securing Guide .
The floor plan for the Cisco CRS must include enough space to install the Cisco CRS 8-Slot Line Card Chassis Enhanced router in the equipment rack and allow sufficient airflow for the system. The floor plan must also provide enough room to access chassis components for maintenance (for example, to remove fan trays, power modules, cables, and air filters).
The following figure shows a top view of the Cisco CRS 8-Slot Line Card Chassis Enhanced router footprint required for installation.
Note | For chassis installation, make sure that enough room exists in front of the chassis to accommodate installation personnel and the scissor lift (or similar lifting device) used to hold the chassis in the rack while it is bolted in. |
The dimensions for the Cisco CRS 8-Slot Line Card Chassis Enhanced router are:
The site requires the following front and rear clearances for chassis installation and maintenance access:
Note | Maintain at least 6 inches (15.2 cm) of clearance at both the inlet and exhaust openings on the chassis and on the power modules to allow sufficient airflow. |
See Power and Cooling for information about the power and cooling systems on the Cisco CRS 8-Slot Line Card Chassis Enhanced router and for information about the power and cooling requirements at the installation site.
A system console is required to configure the routing system for operation. As you plan your site facilities, make sure that the site has enough room for a system console and the console cable is long enough to reach the routing system.
Note | The console port does not support modem control or hardware flow control. The port requires a straight-through EIA/TIA-232 cable. |
As the size of the routing system increases, the cabling required for the chassis increases. For example, a fully loaded Cisco CRS 8-Slot Line Card Chassis Enhanced router has more cables connected to it than a partially loaded chassis. The cabling runs must be carefully planned. The basic configurations for various routing systems should be arranged to minimize the complexity and length of the cable runs. Precut and terminated cables are considered part of the basic configuration.
The cable-management bracket is for organizing these interface cables to keep the front of the chassis clear and to eliminate sharp bends in the cables.
Caution | Excessive bending can damage interface cables. |
The cable-management bracket has a special telescoping feature that allows the bracket to be extended when the chassis is upgraded with higher-density cards. This extension feature also helps in installing the cables in the chassis.
Note | When the telescoping feature is in use the front cover on the chassis cannot be installed. |
The following figure shows the chassis cable-management bracket.
As you consider system cabling, see the following table to determine the types of cables required to connect to ports on the route processor (RP).
RP Port |
Required Cable Type |
||
---|---|---|---|
Ethernet management |
|
||
Alarm |
Shielded cable. Required for EMC compliance. |
You must provide the PLIM interface cables. Because the type and number of interfaces can vary, plan these cable runs prior to the installation. When planning the cable runs, consider the following:
The installation site may require custom cables designed for the facilities. We can assist you in planning custom cables.
A routing system can generate large amounts of fan noise. The Cisco CRS 8-Slot Line Card Chassis Enhanced router has some built-in noise reduction, such as fan speed control. If the routing system is installed in an environment where excessive noise could be harmful to personnel, some other noise reduction options could be attempted. Passive noise reduction could include the installation of foam panels to insulate the surrounding area from the noise.
Additional noise-reduction measures have to be designed on an individual site basis.
Cisco or a Cisco partner can provide a complete installation, from planning to power up. For information about Cisco or Cisco partner installation services, consult Cisco Customer Advocacy.
After the routing system has been installed, it must be tested and certified. Consult Cisco Customer Advocacy for information about testing, certification, and warranties.