question about Log - DSLAM and BRAS

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[sshadow]

Hi,

I have a doubt about communication between DSLAM and BRAS.

Maybe this question is easier and I don't know the answer.

I have a problem and I need to know which IP address some user got in some day and I need log this information, for legal issues:

DSLAM port
day
hour
IP


My question is:

As my PPPoE authentication are the same to all users, example:
user: internet@internet.net
pass: internet


How I could to log IP/port DSLAM delivery to user.

Which device is easier to log, DSLAM or BRAS.

The devices which are used are:

- Alcatel DSLAM, ethernet and ATM (all models, new and old)
- BRAS (Cisco and Juniper)


Thanks,

--
Shadow