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Cisco IOS Release 12.0 Dial Solutions Command Reference
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About This Manual
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Using Cisco IOS Software
- Part 1: Dial-In Port Setup
- Part 2: Dial-In Terminal Service & Remote Node Config
- Part 3: Dial-on-Demand Routing
- Part 4: Dial Backup
- Part 5: NASI Client Commands
- Part 6: Large-Scale Dial Solutions
- Part 7: Cost-Control Solutions
- Part 8: Virtual Private Dialup Networks
- Part 9: Other Network Traffic on ISDN Channels
- Part 10: Dial-Related Addressing Services
- Part 11: Appendixes
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Index
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Table Of Contents
PPP Callback Commands for DDR
This chapter describes the commands used for configuring PPP callback for DDR and ISDN.
For information about the configuration steps used to configure PPP callback, see the "Configure PPP Callback for DDR and ISDN" in the Dial Solutions Configuration Guide.
Many of the dialer commands used in this chapter are described in the DDR part of this manual.
See RFC 1570 for more information about PPP callback.
dialer callback-secure
To enable callback security, use the dialer callback-secure interface configuration command. Use the no form of this command to disable callback security.
dialer callback-secure
no dialer callback-secureSyntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Interface configuration
Usage Guidelines
This command affects those users that are not authorized to be called back with the dialer callback-server command. If the username (hostname in the dialer map command) is not authorized for callback, the call will be disconnected if the dialer callback-secure command is configured. If the dialer callback-secure command is not configured, the call will not be disconnected. In either case, callback has not occurred.
Example
The following partial example configures BRI0 with the commands required to make it function as the callback server on the shared network. Callback security is enabled on BRI0, such that any user other than atlanta will be disconnected and not called back.
interface BRI0ip address 171.1.1.9 255.255.255.0encapsulation pppdialer callback-securedialer enable-timeout 2dialer map ip 171.1.1.8 name atlanta class dial1 81012345678901dialer-group 1ppp callback acceptppp authentication chap!map-class dialer dial1dialer callback-server usernameRelated Commands
You can use the master indexes or search online to find documentation of related commands.
dialer callback-server
dialer map
map-class
ppp callback acceptdialer callback-server
To enable an interface to make return calls when callback is successfully negotiated, use the dialer callback-server interface configuration command. Use the no form of this command to disable return calls.
dialer callback-server [username dialstring]
no dialer callback-serverSyntax Description
Default
Disabled. The default keyword is username.
Command Mode
Interface configuration
Example
The following partial example configures BRI 0 to function as the callback server on the shared network.
interface BRI0ip address 171.1.1.9 255.255.255.0encapsulation pppdialer callback-securedialer enable-timeout 2dialer map ip 171.1.1.8 name atlanta class dial1 81012345678901dialer-group 1ppp callback acceptppp authentication chap!map-class dialer dial1dialer callback-server usernameRelated Commands
You can use the master indexes or search online to find documentation of related commands.
dialer callback-secure
dialer enable-timeout
dialer hold-queue
dialer map
map-class
ppp callbackmap-class dialer
To define a class of shared configuration parameters for PPP callback, use the map-class dialer global configuration command.
map-class dialer classname
Syntax Description
Default
Disabled; no class name is provided.
Command Mode
Global configuration
Usage Guidelines
The classname in the map-class dialer command used to specify the class for PPP callback must be the same as the classname used in the dialer map command.
This command is used on the PPP callback server, not on the callback client.
Example
The following partial example configures BRI 0 to function as the callback server on the shared network. The callback server requires an enable timeout and a map class to be defined.
interface BRI0ip address 7.1.1.7 255.255.255.0encapsulation pppdialer callback-securedialer enable-timeout 2dialer map ip 7.1.1.8 name atlanta class dial1 81012345678901dialer-group 1ppp callback acceptppp authentication chap!map-class dialer dial1dialer callback-server usernameRelated Commands
You can use the master indexes or search online to find documentation of related commands.
dialer map
ppp callback
To enable a dialer interface that is not a data terminal ready (DTR) interface to function either as a callback client that requests callback or as a callback server that accepts callback requests, use the ppp callback interface configuration command.
ppp callback {accept | request}
Syntax Description
Default
Callback requests are neither accepted nor requested.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1.
An interface can request PPP callback only if the interface is configured for PPP authentication with Challenge Handshake Authentication Protocol (CHAP) or Password Authentication Protocol (PAP).
Example
The following example configures a previously defined dialer interface to accept PPP callback requests:
ppp callback acceptRelated Commands
You can use the master indexes or search online to find documentation of related commands.
dialer callback-secure
map-class dialer