Any way to collect network usage data for dial-up subscriber

[aun Joe <sj_hznm () hotmail com>]

NANOGers ,


     is there anyway for AAA to get special  online subscriber usage information without enable interim accouting on 
BRAS?

    Reading through RADIUS protocol , it seems that if we want to get online subscriber information enable interim 
accounting on BRAS is the only way .
     But, if enable that on BRAS ,, all online subscribers accouting infromation will be reported periodically.  that 
will generate too much load on AAA , and
    we  need to monitor a small set of subscribers  only.


  thanks in advance.

joe sun