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This guide describes how to plan and prepare your facilities for the installation of a Cisco CRS Carrier Routing System 16-Slot Line Card Chassis (LCC). Because the installation of a line card chassis may require space, floor loading, power, and cooling modifications to a facility, the site planning should be done well in advance of the scheduled delivery of the system.
This guide describes how to plan and prepare your facilities for the installation of a Cisco CRS Carrier Routing System 16-Slot Line Card Chassis (LCC). Because the installation of a line card chassis may require space, floor loading, power, and cooling modifications to a facility, the site planning should be done well in advance of the scheduled delivery of the system.
Note | If you are already familiar with Cisco CRS routers and components, go straight to the Overview of the Site Planning Steps section and the Appendix Preliminary Site Survey |
This chapter describes the Cisco CRS 16-slot LCC and its main components. It contains the following sections:
The Cisco CRS 16-slot LCC 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 16-slot LCC, in the initial release, is constructed from a single line card chassis, a mechanical enclosure that contains 16 slots for modular services cards (MSCs) or forwarding processor (FPs) cards and associated physical layer interface modules (PLIMs), and eight slots for the complete or partial switch fabric.
The LCC 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 chassis is bolted to the facility floor and does not require an external rack. The chassis contains its own power and cooling systems. Two types of power systems are available: fixed or modular configuration. Both power configurations use either AC or DC power.The chassis also contains route processor cards (RPs) that perform routing-protocol calculations. The RPs distribute forwarding tables to the MSCs and FPs, provide a control path to each MSC or FP for system monitoring functions, and contain hard disks for system and error logging. RPs plug into two dedicated slots in the LCC.
The Cisco CRS 16-slot LCC has 16 MSC slots, each with a capacity of up to 200 gigabits per second (Gbps) ingress and 200 Gbps egress, for a total routing capacity per chassis of 6.4 terabits. (A terabit is 1 x 1012 bits or 1000 gigabits.)
The router is built around a scalable, distributed three-stage Benes switch fabric and a variety of data interfaces. The data interfaces are contained on PLIMs that are mated, in the line card chassis, to an associated MSC or FP. MSCs, and FPs (also referred to as line cards) are cross-connected to each other through the switch fabric.
Note | The Cisco CRS router is described in greater detail in Cisco CRS Carrier Routing System 16-Slot Line Card Chassis System Description. |
The figure below shows a Cisco CRS single-shelf (standalone) system.
The figure below shows the front view of a Cisco CRS 16-slot line card chassis with a fixed configuration AC power system installed. The front view of a Cisco CRS 16-slot line card chassis with a fixed configuration DC power system installed is similar.
The figure below shows the rear view of a Cisco CRS 16-slot line card chassis with a fixed configuration AC and DC power system installed.
The below figure shows the front view of a Cisco CRS 16-slot line card chassis with a modular configuration AC and DC power system installed.
The figure below shows the rear view of a Cisco CRS 16-slot line card chassis with a modular configuration AC and DC power system installed.
The main building block of the Cisco CRS router is the 16-slot line card chassis. The line card chassis is secured to the floor and has locking front and rear doors. No external racks are required for the installation of the chassis.
This section lists the main components of a LCC. 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 line card chassis contains:
Note | For a complete list of available PLIMs, consult your Cisco sales representatives. 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 16-slot line card chassis. Two PRPs perform the same functions as two RPs, but provide enhanced performance for both route processing and system controller functionality.
Note | The LCC supports either 40G fabric cards (FC/S cards), 140G fabric cards (FC-140/S cards), or 400G fabric cards (FC-400/S cards in 200G mode). An LCC with a mix of 40G, 140G, and 400G fabric cards is not a supported mode of operation. Such a mode is temporarily allowed only during the upgrade process. |
The PLIM side of the chassis is considered the front of the chassis—this is where user data cables attach to the PLIMs and where 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 locations of and slot numbers for major cards that plug into the chassis.
The figure below shows the chassis slot numbers on the PLIM side of the Cisco CRS 16-slot line card chassis.
1 |
Upper PLIM card cage |
5 |
Lower PLIM card slots (12 to 15, left to right) |
2 |
Upper PLIM card slots (0 to 3, left to right) |
6 |
RP card slots (RP0 and RP1) |
3 |
Fan controller card slots (FC0 and FC1) |
7 |
Lower PLIM card slots (8 to 11, left to right) |
4 |
Upper PLIM card slots (4 to 7, left to right) |
8 |
Lower PLIM card cage |
As shown in the above figure, the components on the front (PLIM) side of the chassis include:
The figure below shows the chassis slot numbers on the rear (MSC) side of the Cisco CRS 16-slot line card chassis.
1 |
Upper fan tray (FT0) |
5 |
Lower card cage |
2 |
Upper card cage |
6 |
Lower MSC slots (15 to 8, left to right) |
3 |
Upper MSC slots (7 to 0, left to right) |
7 |
Lower switch fabric card slots (SM4 to SM7, left to right) |
4 |
Upper switch fabric card slots (SM0 to SM3, left to right) |
8 |
Lower fan tray (FT1) |
As shown in the above figure, the components on the rear (MSC) side of the chassis include:
The MSC slot numbers are reversed from the PLIM slot numbers on the other side of the chassis. Because an MSC is associated and actually mates through the midplane with a PLIM, 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 it 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 (2 through 15).
The following table lists the steps to prepare your site for the installation of a Cisco CRS line card chassis. 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.
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 |
See |
Check |
---|---|---|
1. Determine where to install the chassis. Ensure that the installation site meets the necessary requirements, including space. |
Basic Cisco CRS Routing System Floor Plans Anchoring the Chassis to the Floor |
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2. Plan for power (fixed or modular configuration, AC or DC) and grounding. |
General Power and Grounding Requirements |
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3. Consider cooling and airflow requirements. |
Line Card Chassis Airflow |
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4. Consider equipment arrival, storage, and transport to the installation site. |
|
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5. Check if system planning requirements, such as high availability and cable management, have been met. |
Planning for High Availability |
|