BNG session lock on 987 user only

[anas.abdullkarim]

hello, i have router A9K with ios xe 6.6.3, 

I configure it as a PPPOE server,(BNG) subscriber ,I try to connected many user to router (PPPOE Client's),

the router accept only 987 session , 

Sun Jun 19 22:35:55.392 GMT
                Active          Standby
                ======          =======
Peak (24 hours)    987                0

what is need? BNG license or what ?