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This chapter describes the Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced router and its main components, and provides an overview of the installation process.
Note | The installation of a Cisco CRS 8-Slot Line Card Chassis Enhanced router may require space, floor loading, power, and cooling modifications to a facility; therefore, you should plan the site well in advance of the scheduled delivery of the system. |
The Cisco CRS Carrier Routing System replaces much of the equipment in service provider points of presence (POPs) today. The routing systems are built around a scalable, distributed three-stage switch fabric and a variety of line card (packet) interfaces. These packet interfaces are located on modular services cards (MSCs) or forwarding processors (FP) and their associated physical layer interface modules (PLIMs), which are effectively cross-connected to each other through the switch fabric.
The Cisco CRS 8-Slot Line Card Chassis Enhanced router is a half-height, rack-mounted 8-slot version of the 16-slot chassis. It is a highly scalable routing system that provides up to 6.4 terabits per second (Tbps) of routing capacity and supports up to 8 MSCs or FPs. (A terabit is 1 x 1012 bits or 1,000 Gigabits.) The chassis installs in a 19-inch equipment rack.
The Cisco CRS 8-Slot Line Card Chassis Enhanced router can be installed in colocation facilities, data centers, and many Tier II and Tier III locations. The routing system consists of a single rack-mounted chassis that contains the following system components:
The Cisco CRS 8-Slot Line Card Chassis Enhanced router has its own power and cooling subsystems. The Cisco CRS 8-Slot Line Card Chassis Enhanced router can use either AC or DC power.
The mid plane on the Cisco CRS 8-Slot Line Card Chassis Enhanced router is redesigned to support 400G per slot.
The Cisco CRS 8-Slot Line Card Chassis Enhanced router supports 40G, 140G, and 400G fabric cards, as follows:
A mixture of 40G, 140G, and 400G fabric cards is not supported except during migration.
Note | Throughout this document, the generic term Cisco CRS Carrier Routing system refers to the Cisco CRS-1, Cisco CRS-3, and Cisco CRS-X Carrier Routing Systems, unless otherwise specified. |
The Cisco CRS 8-Slot Line Card Chassis Enhanced router is the main component of the Cisco CRS Carrier Routing System. The chassis is a mechanical enclosure that contains a chassis midplane. The midplane holds the system modular services cards (MSCs) and forwarding processor (FP) cards, their associated physical layer interface modules (PLIMs), and switch fabric cards (SFCs). The Cisco CRS 8-Slot Line Card Chassis Enhanced router contains its own power system. See the Chassis Power System section for more information. The chassis is mounted in a 19-inch equipment rack.
This section describes the main components of the Cisco CRS 8-Slot Line Card Chassis Enhanced router. It primarily identifies the components that are considered field-replaceable units (FRUs), but where additional detail is useful, identifies subassemblies that are not field replaceable.
The following figure shows the front view of a Cisco CRS 8-Slot Line Card Chassis Enhanced router with an AC and a DC modular configuration power supply installed.
The following figure shows the rear view of a Cisco CRS 8-Slot Line Card Chassis Enhanced router with an AC and a DC modular configuration power supply installed.
The Cisco CRS 8-Slot Line Card Chassis Enhanced router contains the following components:
Each MSC or FP can be associated with several different PLIMs, which provide different interface speeds and technologies. Some of the available PLIMs are:
Note | For a complete list of available PLIMs, consult your Cisco sales representative or visit: http://www.cisco.com |
The RP also monitors system alarms and controls the system fans. LEDS on the front panel indicate active alarm conditions.
A Performance Route Processor (PRP) is also available for the Cisco CRS 8-Slot Line Card Chassis Enhanced router. Two PRPs perform the same functions as two RPs, but provide enhanced performance for both route processing and system controller functionality.
Note | A chassis may not be populated with a mix of RP and PRP cards. Both route processor cards should be of the same type (RP or PRP). |
The switch fabric receives user data from one MSC (or FP) and PLIM pair and performs the switching necessary to route the data to the appropriate egress MSC (or FP) and PLIM pair. The switch fabric is divided into eight planes that evenly distribute the traffic across the switch fabric. Each switch fabric card implements two planes of the switch fabric.
The PLIM side of the chassis is considered the front of the chassis, where user data cables attach to the PLIMs and cool air enters the chassis. The MSC side, which is where warm air is exhausted, is considered the rear of the chassis.
This section identifies the location and slot numbers for major cards and modules (primarily the field-replaceable units) that plug into the chassis.
The following figure shows the slot numbers on the front (PLIM) side of the Cisco CRS 8-Slot Line Card Chassis Enhanced router.
As shown, the front (PLIM) side of the chassis has the following card slots:
The following figure shows the slot numbers on the rear (MSC) of the chassis.
The rear (MSC) side of the chassis has the following card slots:
The MSC slot numbers are reversed from the PLIM slot numbers on the other side of the chassis. Because an MSC mates with its associated PLIM through the midplane, MSC slot 0 is on the far right side of the chassis looking at it from the rear (MSC) side.
PLIM slot 0 is on the far left side of the chassis, looking at if from the front (PLIM) side. MSC slot 0 and PLIM slot 0 mate with each other through the midplane, and so do all other MSC and PLIM slots (0 through 7).
The following table lists the sequence of tasks to perform as you plan the installation of the routing system. Use the table as a checklist for all aspects of the installation. For information about a particular task, see the appropriate section of this site planning guide. After completing the checklist, you should consult your Cisco installation coordinator for a site-readiness inspection
Site Planning Steps |
See |
Check |
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1. Determine where to install the routing system and make sure that you have the appropriate installation and configuration tools. |
Basic Site and Installation Planning section Tools Required for Installation section |
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2. Consider equipment arrival, storage, and transport to the installation site. |
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3. Make sure that the equipment rack meets the installation requirements. |
Equipment Rack Specifications section Equipment Rack Considerations section |
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4. Consider the space where the routing system will be installed. |
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5. Plan for power (AC or DC). |
Power and Cooling section Line Card Chassis Specifications section |
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6. Consider cooling and airflow requirements. |
Chassis Airflow section Facility Cooling Requirements section Environmental Specifications section |
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7. Consider cable management. |
Cable Management section |
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8. Consider Cisco installation services. |
Cisco Installation Services section |
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