Cisco CCNA / CCNP Certification Exam Tutorial: Configuring PPP Callback
You may run into situations where a router in a remote location needs to dial in to a central router, but the toll charges are much higher if the remote router makes the call. This scenario is perfect for PPP Callback, where the callback client places a call to a callback server, authentication takes place, and the server then hangs up on the client! This ensures that the client isn’t charged for the call. The server then calls the client back.
In the following example, R2 has been configured as the client and R1 is the callback server. Let’s look at both configurations and the unique commands PPP Callback requires.
Client:
username R1 password CCIE
interface BRI0
ip address 172.12.12.2 255.255.255.0
encapsulation ppp
dialer map ip 172.12.12.1 name R1 broadcast 5557777
dialer-group 1
isdn switch-type basic-ni
ppp callback request
ppp authentication chap
Most of that configuration will look familiar to you, but the ppp callback request command might not. This command enables the BRI interface to...
To view and download this full PLR article, you must be logged in. Registration is completely free. Once you create your account, you will be able to browse, search & downlod from our PLR articles database of over "1,57,897+" on 1,000's of niches and 200+ categories without paying a penny. Click here to signup...
