Hello Rui, in fact i would like to assign users in different vlan, with an automatic process. If the user's last session is superior à 5 days, mysql does the update of the radusergrouptable, it will change the user's groupname (A to B). At the resultat, freeradius will have to send to the nas a different radgroupreply (B parameters). I use a trigger for it. It works, but i found an issue. Freeradius send to the NAS the old values of the radgrouprely (A parameters). I will try to update ma version of freeradius and find some information about ulang. Thank a lot for your help