> About this Guide
> This preface describes the information contained within this Cisco ASR 5000 Series Serving GPRS Support Node Administration Guide. As well, it lists document conventions, related documents, and contact information for Cisco customer service.
> This guide provides deployment and feature information for the 2G and 3G Serving GPRS Support Node (SGSN) services on the ASR 5000 platform. It includes instructions and engineering rules for using its command line interface (CLI) to configure and manage the 2G and 3G SGSN services. As these services are highly flexible and scalable, it is impossible to document every possible configuration so only basic service setup configuration is provided. In addition, functional and configuration information is provided for many of the more complex features available on the system.
> Conventions Used
> The following tables describe the conventions used throughout this documentation.

> Icon | Notice Type | Description
> | Information Note | Provides information about important features or instructions.
> | Caution | Alerts you of potential damage to a program, device, or system.
> | Warning | Alerts you of potential personal injury or fatality. May also alert you of potential electrical hazards.
> | Electro-Static Discharge (ESD) | Warns you to take proper grounding precautions before handling ESD sensitive components or devices.

> ‌

> Typeface Conventions | Description
> Text represented as a screen display | This typeface represents displays that appear on your terminal screen, for example: Login:
> Text represented as commands | This typeface represents commands that you enter, for example: show ip access-list This document always gives the full form of a command in lowercase letters. Commands are not case sensitive.
> Text represented as a command variable | This typeface represents a variable that is part of a command, for example: show card slot_number slot_number is a variable representing the desired chassis slot number.
> Text represented as menu or sub-menu names | This typeface represents menus and sub-menus that you access within a software application, for example: Click the File menu, then click New

> ‌

> Command Syntax Conventions | Description
> { keyword or variable } | Required keywords and variables are surrounded by grouped braces. Required keywords and variables are those components that are required to be entered as part of the command syntax.
> [ keyword or variable ] | Optional keywords or variables, or those that a user may or may not choose to use, are surrounded by brackets.
> | | Some commands support alternative variables. These options are documented within braces or brackets by separating each variable with a vertical bar. These variables can be used in conjunction with required or optional keywords or variables. For example: { nonce | timestamp } OR [ count number_of_packets | size number_of_bytes ]

> ‌
> Supported Documents and Resources
> Related Common Documentation
> The most up-to-date information for this product is available in the SGSN Release Notes provided with each product release.
> The following Cisco ASR 5000 Series common documents are available and work in conjunction with the SGSN:

> • | Release Change Reference

> • | Hardware Installation Guide

> • | System Administration Guide

> • | Command Line Interface Reference

> • | AAA and GTPP Interface Administration Reference

> • | Statistics and Counters Reference

> • | SNMP MIB Reference

> • | Thresholding Configuration Guide

> • | Product Overview

> Related Product Documentation
> The following product-specific documents are also available and work in conjunction with the SGSN:

> • | Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide

> • | Web Element Manager Installation and Administration Guide

> Obtaining Documentation
> The most current Cisco documentation is available on the following website:
> http://www.cisco.com/cisco/web/psa/default.html
> Use the following path selections to access the SGSN documentation:
> Contacting Customer Support
> Use the information in this section to contact customer support.
> Refer to the support area of http://www.cisco.com for up-to-date product documentation or to submit a service request. A valid username and password are required to access this site. Please contact your Cisco sales or service representative for additional information.

Cisco Systems Inc.
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