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This guide describes how to plan and prepare your facilities for the delivery and installation of a Cisco CRS Carrier Routing System 4-Slot Line Card Chassis (LCC). Because the installation of the LCC may require space, rack-mounting, power, and cooling modifications to a facility, site planning should be done in advance of the scheduled delivery of the chassis.
This chapter describes the Cisco CRS 4-slot LCC and its main components. The following sections are included:
Note | Throughout the remainder of this guide, the Cisco CRS Carrier Routing System 4-Slot LCC is referred to as the Cisco CRS 4-slot LCC. |
The Cisco CRS 4-slot LCC documentation set is workflow-based. There are three core documents that describe the processes required to successfully plan for and install the chassis:
See (add xref) for a complete listing of Cisco CRS 4-slot LCC documentation.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Site Planning Guide (this guide)
Use this guide in advance of receiving the chassis to confirm that you have the needed space, tools, utilities, manpower, etc. that are needed to perform the steps in the unpacking, moving, and securing guide and the installation guide.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Unpacking, Moving, and Securing Guide
This guide is included with the chassis shipment. It includes all Cisco CRS 4-slot LCC unpacking, moving, and securing information.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
This guide is used to initially install the chassis and describes how to remove and install field replaceable units (FRUs).
See (add xref) for a complete listing of Cisco CRS 4-slot LCC documentation.
The Cisco CRS router is a highly scalable routing platform designed for efficient service-provider point-of-presence (POP) evolution as the IP network grows into a multiservices network. The Cisco CRS router is available in 4-slot, 8-slot, 16-slot, and multishelf configurations.
The introduction of the Cisco CRS 4-slot LCC allows service providers to utilize the power and features of a Cisco CRS chassis, but without the space and power requirements associated with the larger versions of the chassis. The Cisco CRS 4-slot LCC is a mechanical enclosure that contains four slots for modular services cards (MSCs) or forwarding processor (FP) cards, and associated physical layer interface modules (PLIMs), plus four slots for the switch fabric cards (SFCs).
The router is built around a scalable, distributed three-stage Benes switch fabric and variety of data interfaces. The data interfaces are contained on physical layer interface modules (PLIMs) that are mated in the Cisco CRS 4-slot LCC to an associated MSC or FP. MSCs and FPs, which are also referred to as line cards, are cross-connected to each other through the switch fabric.
The Cisco CRS 4-slot LCC is installed in a standard external rack and contains its own power and cooling systems. The chassis also contains route processor (RP) cards that perform routing-protocol calculations. The RPs distribute forwarding tables to the modular services cards MSCs, provide a control path to each MSC and FP for system monitoring functions, and contain hard disks for system and error logging. RPs plug into two dedicated slots in the Cisco CRS 4-slot LCC.
Note | The Cisco CRS 4-slot LCC is described in greater detail in the Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description . |
This section lists the main components of the Cisco CRS 4-slot LCC. It primarily identifies the components that are considered field-replaceable units (FRUs). Where additional detail is useful, it also identifies subassemblies that are not field replaceable.
The Cisco CRS 4-slot LCC contains the following components:
Three versions of MSC exist (CRS-MSC, CRS-MSC-B, and CRS-MSC-140G). There are two versions of forwarding processor (FP) cards (CRS-FP40 and CRS-FP-140).
Each MSC and FP can be associated with several different PLIMs, which provide different interface speeds and technologies. The PLIM types available are:
For complete PLIM information, see the following documents:
A Performance Route Processor (PRP) is also available for the Cisco CRS 4-slot line card chassis. Two PRPs perform the same functions as 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 front of the chassis contains the RPs, MSCs, FPs, and PLIMs. This is where user data cables attach to the PLIMs and where cool air enters the chassis. The rear of the chassis contains the fan tray and the SFCs.
The figure below and Figure 2 show the front and rear views of the Cisco CRS 4-slot LCC.
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PLIM slots |
4 |
Air intake |
2 |
RP slots |
5 |
Power supplies |
3 |
MSC slots |
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1 |
Fan tray |
2 |
Switch fabric card (half-height) slots |
3 |
AC input power receptacles and power switches |
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Table 1 lists the steps required to prepare your site for the delivery and installation of a Cisco CRS 4-slot line card chassis. For information about a particular task, see the appropriate chapter or section of this site planning guide.
See the Appendix Preliminary Site Survey for a sample of the preliminary site survey that you should complete before you prepare a detailed site survey.
Site Planning Steps |
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Check |
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1. Confirm that the chassis delivery site meets delivery space requirements |
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2. Determine and gather the required unpacking tools. |
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3. Determine the route from the delivery site to the installation site and confirm space and manpower needs. |
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4. Determine and gather the required moving tools. |
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5. Confirm that the installation site meets basic space requirements. |
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6. Confirm that the installation site meets basic power and grounding requirements. |
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7. Confirm that the installation site meets basic cooling and airflow requirements. |
"Environmental Specifications" section |
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8. Confirm that the installation site meets basic cooling and airflow requirements. |
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