Cisco CRS Carrier Routing System 16-Slot Line Card Chassis System Description
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Table of Contents




Document Organization

Document Conventions

Warning Definition

Related Cisco CRS-1 Series Documentation

Changes to This Document

Obtaining Documentation and Submitting a Service Request


This preface explains the objectives, intended audience, and organization of this guide commonly referred to as the “system description” in this document, and presents the conventions that convey additional information.


This system description describes the Cisco CRS Series Carrier Routing System from a high level. It provides background information and basic theory of operation for anyone wanting to understand the routing system. It describes the major assemblies that comprise the routing system. It can be read as a supplement to the site planning guide, installation documents, and software documents. This system description focuses on the hardware elements of the routing system.


This guide is intended for general audiences who want an overview of the Cisco CRS routing system and its major components.

Document Organization

This system description contains the following chapters and appendixes:

Document Conventions

This guide uses the following conventions:

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this manual.

Caution Means reader be careful. You are capable of doing something that might result in equipment damage or loss of data.

Warning Definition




This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071


See the Cisco CRS Carrier Routing System Regulatory Compliance and Safety Information for translations of warnings and information about the compliance and safety standards with which the Cisco CRS conforms.

Related Cisco CRS-1 Series Documentation

For complete planning, installation, and configuration information, refer to the following documents:

Hardware Documents

Software Documents

For a complete listing of software documentation for the Cisco CRS Carrier Routing System, see

Changes to This Document

Table 1 lists the technical changes made to this document since it was first published.


Table 1 Document Change History

Change Summary

March 2015

Added recommendation to use modular power supplies with CRS-X line cards.

December 2014

Added support for the CRS-MSC-X-L and CRS-FP-X-L line cards.

July 2014

Added updates to support the Cisco CRS-X 400G back-to-back and multishelf systems, which include new CRS-16-FC400/M switch fabric card.

January 2014

Added updates to support the Cisco CRS-X, which includes new line cards, switch fabric cards, and PLIMs.

January 2012

Corrected weight of the Performance Route Processor (PRP) in the Route Processor chapter.

July 2011

Added information about new CRS-LSP Label Switch Processor (LSP) card.

April 2011

Added information about new CRS-16-PRP-6G and CRS-16-PRP-12G Performance Route Processor (PRP) cards. Technical updates and minor editorial changes were also made.


Added modular power configuration information and graphics. Added CRS-1 and CRS-3 information. Also added technical updates and made minor editorial changes.

October 2010

Added information about the new MSC140 and FP140 line cards; CRS-16-FC140/S switch fabric card; 20-port, 14-port, 8-port, and 4-port 10-GE PLIMs; and the 1-port 100-GE PLIM. Minor editorial and technical changes were also made.

June 2010

Added information about the new modular AC and DC power solutions.

February 2010

Updated weight and floor loading values in Appendix A.

February 2007

Updated the document with technical corrections.

May 2007

Updated the document with information on DC power systems and other technical corrections.

April 2006

Updated document with technical corrections.

July 2005

Added information about the S13 switch fabric card, the distributed route processor (DRP), and the DRP physical layer interface module (DRP PLIM). Also added information to describe the single-chassis (standalone) version of the chassis and the multishelf system version.

December 2004

Updated document with technical corrections.

July 2004

Initial release of this document.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

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