...
class type traffic default in-out
drop
[ policy-map type control ISG ]
class type control always event session-start
1 authenticate aaa list ibs-isg
[ bba-group pppoe global ]
virtual-template 1
...
ppp ipcp dns 193.178.200.3 217.218.127.127
service-policy type control ISG
[ radius server ]
radius-server attribute 44 include-in-access-req default-vrf
...