Objective

This system description describes the Cisco CRS 16-Slot Line Card Chassis (LCC) Enhanced router 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.

Audience

This guide is intended for general audiences who want an overview of the Cisco CRS Series Carrier Routing System and its major components.

Document Organization

This system description contains the following chapters and appendixes:

• “Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Enhanced Router Overview,” provides an overview of the routing system.
• “Power Systems,” provides a detailed physical description of the chassis DC and AC power systems.
• “Cooling System,” provides an overview of the chassis cooling system.
• “Switch Fabric,” provides an overview of the switch fabric. It also describes the switch fabric cards used in the single-chassis system and the multishelf system.
• “Line Cards and Physical Layer Interface Modules,” provides an overview of the MSC (line card) and its associated PLIMs.
• “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 A, “Cisco CRS Carrier Routing System 16-Slot Enhanced Line Card Chassis Specifications,” provides tables of specifications for the LCC and its components.
• Appendix B, “Product IDs,” provides information about the product structure and product IDs for components of the Cisco CRS Carrier Routing System 16-Slot Enhanced Chassis Line Card Chassis.

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.

Warning Definition

 

Warning

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 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 Series Documentation

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

Changes to This Document

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

Obtaining Documentation and Submitting a Service Request

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http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

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