This preface contains the following sections:
This guide describes how to interconnect the two 8-slot chassis that comprise the CRS Back-to-Back System . This guide supplements other chassis documentation, such as site planning and installation documents.
This guide is written for hardware installers and system administrators of Cisco routers.
This publication assumes that the user has a substantial background in installing and configuring router and switch-based hardware. The reader should also be familiar with electronic circuitry and wiring practices, and have experience as an electronic or electromechanical technician.
Changes to This Document
This table lists the technical changes to this document since it was first released.
Table 1 Changes to This Document
Added chapter with procedures for upgrading from Cisco IOS-XR release 5.1.1 or later.
Initial release of this document.
This guide includes the following sections:
This document uses the following conventions:
Caution: Means be careful. You are capable of doing something that might result in equipment damage or loss of data.
Note: Means take note . Notes contain helpful suggestions or references to materials not contained in this manual.
Note: Means the described action saves time . You can save time by performing the action described in the paragraph.
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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device. Statement 1071.
Understanding Warning Statement Numbers
Each Warning in this guide contains a Statement Number. For example, the previous warning is Statement 1071. The Regulatory Compliance and Safety Information for the Cisco CRS-1 Carrier Routing System booklet contains translations of every warning that appears in this guide. The compliance and safety booklet shipped with your chassis. The booklet lists translated warnings in numerical sequence, by statement number.
Related Cisco CRS Documentation
This section refers you to other documentation that contains complete planning, installation, and configuration information.
The documentation listed below is available online.
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Installation Guide
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Unpacking, Moving, and Securing Guide
Regulatory Compliance and Safety Information for the Cisco CRS Carrier Routing System
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router Site Planning Guide
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router Installation Guide
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router Unpacking, Moving, and Securing Guide
Cisco CRS-1 Carrier Routing System Fiber-Optic Cleaning Guide
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:
Subscribe to the What’s New in Cisco Product Documentation
as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS Version 2.0.