thanks for your reply.
it is obvious just like Cisco Routers when something come up to AAA server we bypass the AAA
with these commands on interface that terminate PPPoE:
"no ppp authentication"
"no ppp authorization"
"no ppp accounting"
so users can connect to network without AAA and we just assign ip address to them via dhcp defined in router.
please help me,this feature is really necessary for me.