Cisco ASR 903 Router Chassis Software Configuration Guide, IOS XE Release 3.7
Downloads: This chapterpdf (PDF - 105.0 KB) The complete bookPDF (PDF - 1.95 MB) | Feedback

Table of Contents



Document Revision History


Related Documentation

Document Conventions

Obtaining Documentation and Submitting a Service Request


This preface describes the objectives and organization of this document and explains how to find additional information on related products and services. This preface contains the following sections:


This document provides an overview of software functionality that is specific to the Cisco ASR 903 Series Router. It is not intended as a comprehensive guide to all of the software features that can be run using the Cisco ASR 903 Series Router, but only the software aspects that are specific to this platform.

For information on general software features that are also available on other Cisco platforms, see the Cisco IOS XE technology guide for that specific software feature.

Document Revision History

The Document Revision History records technical changes to this document. The table shows the Cisco IOS XE software release number and document revision number for the change, the date of the change, and a brief summary of the change.


Release No.
Change Summary

IOS XE 3.5s

November 2011

First release.

IOS XE 3.5s

February 2012

Added Installing and Upgrading Software chapter.

IOS XE 3.5(1)s

February 2012

Added information about QoS ACL feature.

IOS XE 3.6

March 2012

Updated for IOS XE Release 3.6.

IOS XE 3.6(1)

May 2012

Updated for IOS XE Release 3.6.1.

IOS XE 3.7

July 2012

Updated for IOS XE Release 3.7.

IOS XE 3.7(1)

October 2012

Updated for IOS XE Release 3.7(1).


This document contains the following chapters:




Using Cisco IOS XE Software

Provides an introduction to accessing the command-line interface (CLI) and using the Cisco software and related tools.


Console Port, Telnet, and SSH Handling

Provides an overview and configuration options for the handling of incoming console port, telnet, and SSH traffic.


Using the Management Ethernet Interface

Provides an overview and configuration options for the Management Ethernet interface.


High Availability Overview

Provides an overview of the High Availability architecture, behavior, and features.


Installing and Upgrading Software

Provides instructions on how to install and upgrade software and firmware on the router.


Configuring the Route Switch Processor

Provides information on configuring Route Switch Processors (RSPs).


Configuring Ethernet Interfaces

Provides information on configuring the Ethernet interface modules.


Configuring T1/E1 Interfaces

Provides information on configuring the T1/E1 interface modules.


Configuring Optical Interface Modules

Provides information on configuring Optical interface modules.


Configuring Clocking and Timing

Provides information on configuring clocking and timing features.


Configuring Synchronous Ethernet ESMC and SSM

Provides information on configuring Synchronous Ethernet clock synchronization features.


Configuring Pseudowire

Provides information on configuring MPLS pseudowire features.


Configuring Quality of Service

Provides information on configuring QoS features.


Tracing and Trace Management

Provides an overview of tracing on the Cisco and how to manage the tracing process and files.


Related Documentation

This section refers you to other documentation for configuring your Cisco ASR 903 Series Router.

The documentation homepage for the Cisco ASR 903 Series Router is:

The documentation homepage for Cisco IOS XE contains Cisco IOS XE technology guides and feature documentation and can be viewed at:

For information on commands, see one of the following resources:

Document Conventions

This documentation uses the following conventions:



^ or Ctrl

The ^ and Ctrl symbols represent the Control key. For example, the key combination ^D or Ctrl-D means hold down the Control key while you press the D key. Keys are indicated in capital letters but are not case sensitive.


A string is a nonquoted set of characters shown in italics. For example, when setting an SNMP community string to public, do not use quotation marks around the string or the string will include the quotation marks.

Command syntax descriptions use the following conventions:




Bold text indicates commands and keywords that you enter exactly as shown.


Italic text indicates arguments for which you supply values.


Square brackets enclose an optional element (keyword or argument).


A vertical line indicates a choice within an optional or required set of keywords or arguments.

[x | y]

Square brackets enclosing keywords or arguments separated by a vertical line indicate an optional choice.

{x | y}

Braces enclosing keywords or arguments separated by a vertical line indicate a required choice.

Nested sets of square brackets or braces indicate optional or required choices within optional or required elements. For example:



[x {y | z}]

Braces and a vertical line within square brackets indicate a required choice within an optional element.

Examples use the following conventions:



Examples of information displayed on the screen are set in Courier font.

bold screen

Examples of text that you must enter are set in Courier bold font.

< >

Angle brackets enclose text that is not printed to the screen, such as passwords.


An exclamation point at the beginning of a line indicates a comment line. (Exclamation points are also displayed by the Cisco IOS software for certain processes.)

[ ]

Square brackets enclose default responses to system prompts.

The following conventions are used to attract the attention of the reader:

Caution Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.

NoteMeans Means reader take note. Notes contain helpful suggestions or references to materials that may not be contained in this manual.

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.