ISDN Backup using Chap and TACAS

[dconstantino]

I have multiple sites comming into a central location with an ISDN bri as backup for fail over for voice and data. I need a config for implementing with TACAS. Thanks

[vinodgupt]

You can configure the dialer interface and make your dialer interface as the backup interface.

In this way all the interface vcan use the same physical port for dial backup and for chap configure for authentication as

ppp authentication chap

and for frpm tacacs, you have to configure on line as

login tacacs

[dconstantino]

I guess what ever the user name and password of the tacas is what I put on the remote router to auth. It has to be the same on my core router also right

?????