Specifications

DC-446
Cisco IOS Dial Technologies Configuration Guide
Configuring Dial Backup with Dialer Profiles
This chapter describes how to configure dialer interfaces, which can be configured as the logical
intermediary between one or more physical interfaces and another physical interface that is to function
as backup. It includes the following main sections:
• Dial Backup with Dialer Profiles Overview
• How to Configure Dial Backup with Dialer Profiles
• Configuration Example of Dialer Profile for ISDN BRI Backing Up Two Leased Lines
To identify the hardware platform or software image information associated with a feature, use the
Feature Navigator on Cisco.com to search for information about the feature or refer to the software
release notes for a specific release. For more information, see the “Identifying Supported Platforms”
section in the “Using Cisco IOS Software” chapter.
For a complete description of the dial backup commands in this chapter, refer to the Cisco IOS Dial
Technologies Command Reference. To locate documentation of other commands that appear in this
chapter, use the command reference master index or search online.
Dial Backup with Dialer Profiles Overview
A backup interface is an interface that stays idle until certain circumstances occur; then it is activated.
Dialer interfaces can be configured to use a specific dialing pool; in turn, physical interfaces can be
configured to belong to the same dialing pool.
See the section “Configuration Example of Dialer Profile for ISDN BRI Backing Up Two Leased Lines”
at the end of this chapter for a comprehensive example of a dial backup interface using dialer profiles.
In the example, one BRI functions as backup to two serial lines and can make calls to two different
destinations.
How to Configure Dial Backup with Dialer Profiles
To configure a dialer interface and a specific physical interface to function as backup to other physical
interfaces, perform the tasks in the following sections:
• Configuring a Dialer Interface (Required)
• Configuring a Physical Interface to Function As Backup (Required)
• Configuring Interfaces to Use a Backup Interface (Required)