[cisco-nas] include extra attribute in the auth request

[Tassos Chatzithomaoglou]

Is there a way i can include something extra/unique (besides username/password) in the auth request 
of a ppp client?

I have a cisco 876 making some adsl/isdn calls and i want to have it include a user-specified 
attribute in the dialer auth request. Is that possible?

I'm asking this because i want radius to be able to tell if both the adsl & isdn calls originate 
from the same client.

Tassos