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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.
Ctrl represents the key labeled Control. For example, the key combination Ctrl- Z means hold down the Control key while you press the Z key.
Examples that contain system prompts denote interactive sessions, indicating the commands that you should enter at the prompt. For example:
RP/0/RSP0/CPU0:router#
| Convention | Description |
|---|---|
| bold font |
Commands and keywords and user-entered text appear in bold font. |
| Italic font |
Document titles, new or emphasized terms, and arguments for which you supply values are in italic font. |
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[ ] |
Elements in square brackets are optional. |
|
{x | y | z} |
Required alternative keywords are grouped in braces and separated by vertical bars. |
|
[x | y | z] |
Optional alternative keywords are grouped in brackets and separated by vertical bars. |
|
string |
A nonquoted set of characters. Do not use quotation marks around the string or the string will include the quotation marks. |
courier font
|
Terminal
sessions and information the system displays appear in
|
|
Indicates a variable for which you supply values, in context where italics cannot be used. |
|
|
< > |
Nonprinting characters such as passwords are in angle brackets. |
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[ ] |
Default responses to system prompts are in square brackets. |
|
!, # |
An exclamation point (!) or a pound sign (#) at the beginning of a line of code indicates a comment line. |
 Note |
Means reader take note. Notes contain helpful suggestions or references to material not covered in the manual. |
 Tip |
Means the following information will help you solve a problem. The tips information might not be troubleshooting or even an action, but could be useful information, similar to a Timesaver. |
 Caution |
Means reader be careful. In this situation, you might perform an action that could result in equipment damage or loss of data. |
 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. SAVE THESE INSTRUCTIONS |
Warning |
Statements using this symbol are provided for additional information and to comply with regulatory and customer requirements. |
For complete planning, installation, and configuration information, refer to the following documents:
For a complete listing of software documentation for the Cisco CRS Carrier Routing System, see http://www.cisco.com/c/en/us/support/routers/carrier-routing-system/tsd-products-support-series-home.html
This table lists the technical changes made to this document since it was first created.
|
Date |
Change Summary |
|---|---|
|
March 2015 |
Added recommendation to use modular power supplies with CRS-X line cards. |
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December 2014 |
Added support for the CRS-MSC-X-L and CRS-FP-X-L line cards. |
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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. |
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January 2014 |
Added updates to support the Cisco CRS-X, which includes new line cards, switch fabric cards, and PLIMs. |
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January 2012 |
Corrected weight of the Performance Route Processor (PRP) in the Route Processor chapter. |
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July 2011 |
Added information about new CRS-LSP Label Switch Processor (LSP) card. |
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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. |
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3/4/2011 |
Added modular power configuration information and graphics. Added CRS-1 and CRS-3 information. Also added technical updates and made minor editorial changes. |
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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. |
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June 2010 |
Added information about the new modular AC and DC power solutions. |
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February 2010 |
Updated weight and floor loading values in Appendix A. |
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February 2007 |
Updated the document with technical corrections. |
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May 2007 |
Updated the document with information on DC power systems and other technical corrections. |
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April 2006 |
Updated document with technical corrections. |
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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. |
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