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Cisco IOS Carrier Ethernet
Configuration Guide
Release 15.0
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Cisco IOS Carrier Ethernet Configuration Guide
© 2009 Cisco Systems, Inc. All rights reserved.
i
About Cisco IOS Software Documentation
Last Updated: October 14, 2009
This document describes the objectives, audience, conventions, and organization used in Cisco IOS
software documentation. Also included are resources for obtaining technical assistance, additional
documentation, and other information from Cisco. This document is organized into the following
sections:
• Documentation Objectives, page i
• Audience, page i
• Documentation Conventions, page i
• Documentation Organization, page iii
• Additional Resources and Documentation Feedback, page xii
Documentation Objectives
Cisco IOS documentation describes the tasks and commands available to configure and maintain Cisco
networking devices.
Audience
The Cisco IOS documentation set is intended for users who configure and maintain Cisco networking
devices (such as routers and switches) but who may not be familiar with the configuration and
maintenance tasks, the relationship among tasks, or the Cisco IOS commands necessary to perform
particular tasks. The Cisco IOS documentation set is also intended for those users experienced with
Cisco IOS software who need to know about new features, new configuration options, and new software
characteristics in the current Cisco IOS release.
Documentation Conventions
In Cisco IOS documentation, the term router may be used to refer to various Cisco products; for example,
routers, access servers, and switches. These and other networking devices that support Cisco IOS
software are shown interchangeably in examples and are used only for illustrative purposes. An example
that shows one product does not necessarily mean that other products are not supported.
About Cisco IOS Software Documentation
Documentation Conventions
ii
This section contains the following topics:
• Typographic Conventions, page ii
• Command Syntax Conventions, page ii
• Software Conventions, page iii
• Reader Alert Conventions, page iii
Typographic Conventions
Cisco IOS documentation uses the following typographic conventions:
Command Syntax Conventions
Cisco IOS documentation uses the following command syntax conventions:
Convention Description
^ or Ctrl Both the ^ symbol and Ctrl represent the Control (Ctrl) key on a keyboard. For
example, the key combination ^D or Ctrl-D means that you hold down the
Control key while you press the D key. (Keys are indicated in capital letters but
are not case sensitive.)
string A string is a nonquoted set of characters shown in italics. For example, when
setting a Simple Network Management Protocol (SNMP) community string to
public, do not use quotation marks around the string; otherwise, the string will
include the quotation marks.
Convention Description
bold Bold text indicates commands and keywords that you enter as shown.
italic Italic text indicates arguments for which you supply values.
[x] Square brackets enclose an optional keyword or argument.
... An ellipsis (three consecutive nonbolded periods without spaces) after a syntax
element indicates that the element can be repeated.
| A vertical line, called a pipe, that is enclosed within braces or square brackets
indicates a choice within a set of keywords or arguments.
[x | y] Square brackets enclosing keywords or arguments separated by a pipe indicate an
optional choice.
{x | y} Braces enclosing keywords or arguments separated by a pipe indicate a
required choice.
[x {y | z}] Braces and a pipe within square brackets indicate a required choice within an
optional element.
About Cisco IOS Software Documentation
Documentation Organization
iii
Software Conventions
Cisco IOS software uses the following program code conventions:
Reader Alert Conventions
Cisco IOS documentation uses the following conventions for reader alerts:
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 material not covered in the
manual.
Timesaver Means the described action saves time. You can save time by performing the action described in the
paragraph.
Documentation Organization
This section describes the Cisco IOS documentation set, how it is organized, and how to access it on
Cisco.com. It also lists the configuration guides, command references, and supplementary references and
resources that comprise the documentation set. It contains the following topics:
• Cisco IOS Documentation Set, page iv
• Cisco IOS Documentation on Cisco.com, page iv
• Configuration Guides, Command References, and Supplementary Resources, page v
Convention Description
Courier font
Courier font is used for information that is displayed on a PC or terminal screen.
Bold Courier font
Bold Courier font indicates text that the user must enter.
< > Angle brackets enclose text that is not displayed, such as a password. Angle
brackets also are used in contexts in which the italic font style is not supported;
for example, ASCII text.
! An exclamation point at the beginning of a line indicates that the text that follows
is a comment, not a line of code. An exclamation point is also displayed by
Cisco IOS software for certain processes.
[ ] Square brackets enclose default responses to system prompts.
