|
|
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.
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-secureThis command has no arguments or keywords.
Disabled
Interface configuration
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.
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 BRI0 ip address 171.1.1.9 255.255.255.0 encapsulation ppp dialer callback-secure dialer enable-timeout 2 dialer map ip 171.1.1.8 name atlanta class dial1 81012345678901 dialer-group 1 ppp callback accept ppp authentication chap ! map-class dialer dial1 dialer callback-server username
You can use the master indexes or search online to find documentation of related commands.
dialer callback-server
dialer map
map-class
ppp callback accept
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]
username | (Optional) Identifies the return call by looking up the authenticated host name in a dialer map command. This is the default. |
dialstring | (Optional) Identifies the return call during callback negotiation. |
Disabled. The default keyword is username.
Interface configuration
The following partial example configures BRI 0 to function as the callback server on the shared network.
interface BRI0 ip address 171.1.1.9 255.255.255.0 encapsulation ppp dialer callback-secure dialer enable-timeout 2 dialer map ip 171.1.1.8 name atlanta class dial1 81012345678901 dialer-group 1 ppp callback accept ppp authentication chap ! map-class dialer dial1 dialer callback-server username
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 callback
To define a class of shared configuration parameters for PPP callback, use the map-class dialer global configuration command.
map-class dialer classname
classname | Unique class identifier. |
Disabled; no class name is provided.
Global configuration
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.
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 BRI0 ip address 7.1.1.7 255.255.255.0 encapsulation ppp dialer callback-secure dialer enable-timeout 2 dialer map ip 7.1.1.8 name atlanta class dial1 81012345678901 dialer-group 1 ppp callback accept ppp authentication chap ! map-class dialer dial1 dialer callback-server username
You can use the master indexes or search online to find documentation of related commands.
dialer map
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}
accept | Enables this dialer interface to accept PPP callback requests (and function as the PPP callback server). |
request | Enables this dialer interface to request PPP callback (and function as the PPP callback client). |
Callback requests are neither accepted nor requested.
Interface configuration
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).
The following example configures a previously defined dialer interface to accept PPP callback requests:
ppp callback accept
You can use the master indexes or search online to find documentation of related commands.
dialer callback-secure
map-class dialer
Posted: Wed Aug 30 22:23:06 PDT 2000
Copyright 1989-2000©Cisco Systems Inc.