Cisco 901 Installation manual

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Cisco ASR 901 Aggregation Services
Router Command Reference
July 30, 2014
Text Part Number: OL-26031-07

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Cisco ASR 901 Aggregation Services Router Command Reference
© 2011-2013 Cisco Systems, Inc. All rights reserved.

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CONTENTS
Cisco ASR 901 Aggregation Services Router Command Reference i
Document Revision History v
Objectives v
Audience vi
Conventions vi
Related Documentation vii
Obtaining Documentation and Submitting a Service Request vii
Using Command-Line Interface 1-1
Getting Help 1-1
How to Find Command Options 1-2
Understanding Command Modes 1-4
Using the No and Default Forms of Commands 1-5
Saving Configuration Changes 1-5
CLI Command Reference 1-1

Contents
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About This Guide
Revised: July 30, 2014, OL-26031-07
This section describes the objectives, audience, organization, and conventions of this software command
reference. It contains the following sections:
•Document Revision History, page v
•Objectives, page v
•Audience, page vi
•Conventions, page vi
•Related Documentation, page vii
•Obtaining Documentation and Submitting a Service Request, page vii
Document Revision History
The Document Revision History table below records technical changes to this document.
Objectives
This guide explains how to use the Command Line Interface on the Cisco ASR 901 Series Aggregation
Services Router.
Document
Number Date Change Summary
OL-26031-01 October 25, 2011 Initial release of the document.
OL-26031-02 August 16, 2012 Updated the document.
OL-26031-03 February 12, 2013 Updated the document.
OL-26031-04 March 28, 2013 Updated the document.
OL-26031-05 July 31, 2013 Updated the document. Added asr901-platf-multi-nni-cfm
command.
OL-26031-06 November 21, 2013 Updated the document.

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Chapter
Audience
This publication is for the person responsible for configuring the router. This guide is intended for the
following audiences:
•Customers with technical networking background and experience
•System administrators who are familiar with the fundamentals of router-based internetworking, but
who may not be familiar with Cisco IOS software
•System administrators who are responsible for installing and configuring internetworking
equipment, and who are familiar with Cisco IOS software
Conventions
This document uses the following conventions:
Note Means reader take note.
Tip Means the following information will help you solve a problem.
Caution Means reader be careful. In this situation, you might perform an action that could result in equipment
damage or loss of data.
Convention Indication
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.
[ ] 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 courier font.
< > Nonprinting characters such as passwords are in angle brackets.
[ ] 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.

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Chapter
Timesaver Means the described action saves time. You can save time by performing the action described in
the paragraph.
Warning Means reader be warned. In this situation, you might perform an action that could result in
bodily injury.
Related Documentation
The following list includes documentation related to the product by implementation.
– Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
– Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
– Regulatory Compliance and Safety Information for the Cisco ASR 901 Series Aggregation
Services Router
– Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release
Note To obtain the latest information, access the online documentation.
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:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What’s New in Cisco Product Documentation as an RSS feed and set content to be
delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently
supports RSS Version 2.0.

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Chapter

CHAPTER
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1
Using Command-Line Interface
Revised: July 30, 2014, OL-26031-07
This chapter provides information for understanding the Cisco ASR 901 series router using the
command-line interface (CLI). This chapter includes the following sections:
•Getting Help, page 1-1
•How to Find Command Options, page 1-2
•Understanding Command Modes, page 1-4
•Using the No and Default Forms of Commands, page 1-5
•Saving Configuration Changes, page 1-5
For an overview of the Cisco ASR 901 series router, refer to the Cisco ASR 901 Series Aggregation
Services Router Software Configuration Guide.
Getting Help
To obtain a list of commands that are available for each command mode, enter a question mark (?) at the
system prompt. You also can obtain a list of any command’s associated keywords and arguments with
the context-sensitive help feature.
Table 1-1 lists commands you can enter to get help that is specific to a command mode, a command, a
keyword, or an argument.
Table 1-1 Getting Help
Command Purpose
abbreviated-command-entry?Obtain a list of commands that begin with a
particular character string. (Do not leave a space
between the command and question mark.)
abbreviated-command-entry<Tab> Complete a partial command name.
? List all commands available for a particular
command mode.
command ? List a command’s associated keywords. Leave a
space between the command and question mark.
command keyword ? List a keyword’s associated arguments. Leave a
space between the keyword and question mark.

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Chapter 1 Using Command-Line Interface
How to Find Command Options
How to Find Command Options
This section provides an example of how to display syntax for a command. The syntax can consist of
optional or required keywords. To display keywords for a command, enter a question mark (?) at the
configuration prompt or after entering part of a command followed by a space. The Cisco ASR 901 series
router software displays a list of available keywords along with a brief description of the keywords. For
example, if you are in global configuration mode and want to see all the keywords for the cem command,
you enter cem ?.
Table 1-2 shows examples of how you can use the question mark (?)to assist you in entering commands
and also guides you through entering the following command:
•interface gigabitethernet 0/1
Table 1-2 How to Find Command Options
Command Comment
Router> enable
Password: <password>
Router#
Enter the enable command and
password to access privileged EXEC
commands.
You are in privileged EXEC mode
when the prompt changes to Router#.
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Enter global configuration mode.
You are in global configuration mode
when the prompt changes to
Router(config)#.