Software Configuration Guide for the Cisco ISR 4400 Series
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Table of Contents



Important Information on Features and Commands

Related Documentation

Document Conventions

Obtaining Documentation and Submitting a Service Request


This section briefly describes the objectives of this document and links to additional information on related products and services.


This document is a summary of software functionality that is specific to Cisco ISR 4400 Series routers. The structure of this document is explained in the Overview.

Important Information on Features and Commands

For further information on Cisco IOS XE software, including features available on the router (described in configuration guides), see Cisco IOS XE 3S Software Documentation . In addition to the features in the Cisco IOS XE 3S Configuration Guides there also some separate configuration guides for: No Service Password Recovery, Multilink PPP Support, and Network Synchronization—see the Configuration Guides for the Cisco ISR 4400 Series .

To verify support for specific features, use Cisco Feature Navigator. For more information, see the “Using Cisco Feature Navigator” section.

To find reference information for a specific Cisco IOS XE command, see the Cisco IOS Master Command List, All Releases .

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 XE 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.

Note 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: