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.
This system description contains the following chapters and appendixes:
“Route Processor,” provides an overview of the route processor (RP), performance route processor (PRP), distributed route processor (DRP), and DRP physical layer interface module (PLIM).
“Single-Chassis System Summary,” provides a summary of the single-chassis system and includes brief introduction of the routing system cabling requirements. This chapter also describes the Building Integrated Timing System (BITS).
“Control Plane,” provides an overview of the routing system control plane, logical routers, and system diagnostics.
Appendix B, “Product IDs,” provides information about the product structure and product IDs for components of the Cisco CRS-1 routing system Multishelf System.
This guide uses the following conventions:
NoteMeans reader take note. Notes contain helpful suggestions or references to materials not contained in this manual.
reader be careful. You are capable of doing something that might result in equipment damage or loss of data.
IMPORTANT SAFETY INSTRUCTIONS
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
SAVE THESE INSTRUCTIONS
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:
Table 1 lists the technical changes made to this document since it was first published.
Table 1 Document Change History
Added recommendation to use modular power supplies with CRS-X line cards.
Added support for the CRS-MSC-X-L and CRS-FP-X-L line cards.
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.
Added updates to support the Cisco CRS-X, which includes new line cards, switch fabric cards, and PLIMs.
Corrected weight of the Performance Route Processor (PRP) in the Route Processor chapter.
Added information about new CRS-LSP Label Switch Processor (LSP) card.
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.
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.
Added information about the new modular AC and DC power solutions.
Updated weight and floor loading values in Appendix A.
Updated the document with technical corrections.
Updated the document with information on DC power systems and other technical corrections.
Updated document with technical corrections.
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.
Updated document with technical corrections.
Initial release of this document.
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