Sоrk's post in Высокий пинг на хосты за ONU was marked as the answer
помогло решение из темы: http://local.com.ua/forum/topic/53164-продам-pon-onu-fiberhome-zte-совместимы-с-bdcom/?p=534906
теперь пинг 1-2 мс
conf
epon mpcp-timeout 60
epon dba hardware cycletime 25000 discovery-frequence 40 discovery-length 2048
epon dynamic-binding-timeout 40
interface EPON0/1
epon mpcp-registration ctc 30
interface EPON0/2
epon mpcp-registration ctc 30
interface EPON0/3
epon mpcp-registration ctc 30
interface EPON0/4
epon mpcp-registration ctc 30
