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Cisco CRS-1 Carrier Routing System 16-Slot Multishelf System Site Planning Guide
OL-7422-04
Chapter 2 16-Slot Fabric Card Chassis Installation Site Requirements
Chassis Cabling Requirements
–
For installation in different rooms, the distance between each of the chassis and the
Cisco Catalyst 6509 Switches must be less than 328 feet (100 meters).
• The fabric card chassis is shipped with two cable management brackets installed above each card
cage on the front of the chassis. You can use these brackets to route and organize cables that attach
to cards in the front of the chassis.
• Cable management brackets are shipped with attached Velcro straps. You can use these straps to
group and organize cables into bundles. You can also insert the straps into the slots on card handles
to route the cables up or down the chassis and to keep them organized and neat.
• Determine whether cables will run down the chassis (from overhead cable ducts or the ceiling) or
up the chassis (from beneath raised floors). Be sure to consider all types of cables (power, chassis
interconnect, system management, and so on).
The following sections provide information about the different types of cables used on the fabric card
chassis and in the multishelf system. In addition, the “Handling Optics and Making Optical
Connections” section on page 2-23 provides information about handling optics and making optical
connections.
Power and Ground Cables
Chapter 2, “16-Slot Fabric Card Chassis Installation Site Requirements,” describes the types of power
and ground cables used with the fabric card chassis. In addition to those requirements, you should
consider the following:
• Are power outlets located above the chassis, on the wall, or beneath the floor? Are they easy to
access? If the outlets are beneath the floor, which tiles need to be removed to access the outlets?
• How will power cords be routed to the power outlets? How will you handle excess cable?
• Will you need to cut holes in raised floors to route power cables to the chassis? If so, have you
determined where to drill the holes so that they do not affect any reinforcement in the flooring?
• Are power cords long enough to reach the power outlet? If not, do you have longer properly rated
cords?
System Management Cables (2-Port SCGE-Based System)
An external Cisco Catalyst 6509 Switch (Cat6509) provides the control ethernet network for the
multishelf system. In addition, a terminal server and seven or eight console connections are required
(one for each RP and SCGE in the fabric and line card chassis and one for each Cat6509).
• Use single mode fiber-optic cable to connect each chassis to the Cat6509 switches.
• You need four cables for each fabric and line card chassis (two cables for each Cat6509).
• Use straight-through EIA/TIA-232 cable for the console port on the system console. The port does
not support modem control or hardware flow control.
• Use shielded cable for the alarm module cable (required for EMC compliance).
System Management Cables (22-Port SCGE-Based System)
The 22-port SCGE card provides the control ethernet network for the multishelf system. Review the
following cable requirements: