Cisco crs carrier routing system, C h a p t e r, Chapter 1, “cisco crs carrier routing system – Cisco CRS-1 User Manual

Page 9

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C H A P T E R

1-1

Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

OL-5802-09

1

Cisco CRS Carrier Routing System

This chapter describes the Cisco CRS 8-slot LCC and its main components, and provides an overview
of the installation process. It contains the following sections:

The Cisco CRS 8-Slot Line Card Chassis, page 1-2

Overview of Site Planning Steps, page 1-11

Note

The installation of a CRS 8-slot LCC 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 LCC is a half-height, rack-mounted 8-slot version of the 16-slot chassis. It is a
highly scalable routing system that provides 2.24 terabits per second (Tbps) of routing capacity and
supports up to 8 MSCs or FPs. (A terabit is 1 x 10

12

bits or 1,000 Gigabits.) The chassis installs in a

19-inch equipment rack.

The Cisco CRS 8-slot LCC 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 system
components:

Modular services cards (MSCs) or forwarding processors (FP), also called line cards (up to eight)

Physical layer interface modules, or PLIMs (up to eight, one for each MSC or FP)

Route processor (RP) cards (up to two) or performance route processor (PRP) cards (up to two)

Switch fabric cards (SFCs) (four required)

A chassis midplane that connects MSCs or FPs to their PLIMs and to switch fabric cards

The Cisco CRS 8-slot LCC has its own power and cooling subsystems. Two types of power systems are
available: fixed or modular configuration. Both power configurations use either AC or DC power.

The Cisco CRS 8-slot line card chassis supports both 40 G and 140 G fabric cards and line cards. The
Cisco CRS-1 Carrier Routing System uses fabric cards designed for 40 GB operation (FC/S cards) and
the Cisco CRS-3 Carrier Routing System uses fabric cards designed for 140 GB operation (FC-140/S
cards).

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