...
ppp ipcp dns 193.178.200.3 217.218.127.127
[ radius server ]
radius-server attribute 44 include-in-access-req default-vrf
radius-server attribute 8 include-in-access-req
radius-server host 172.16.18.10 auth-port 1812 acct-port 1813 key 7 0472293501266C0F
radius-server source-ports extended
radius-server retransmit 1
radius-server timeout 3
radius-server vsa send accounting
radius-server vsa send authentication