@IndrajitIG @Kevin_Z  To my knowledge Operator OLT always runs with invertor backup, here my cable operators OLT runs 24*7, My router not connected with invertor so i am facing EPON registering loop after power resume, but one of my neighbor router(Netlink) works with invertor backup has active internet connection during power termination in my area. But problem here is all other four other ONU(netlink) able to work immediatley after power resume in my area but my tplink xx530v some time successful with EPON Registration other time its falling into EPON registering Loop after power resume (I able to Verify all this in my neighbors ONU(netlink), because i have all five neighbors landline number so ill dial immediately to respective landline number after this power cycle)  

** No, an ONU does not need a PPPoE profile for the initial EPON registration with the OLT

** ONU Registration is a Layer 2 process where the ONU and OLT establish physical connectivity and optical synchronization. PPPoE is a Layer 3 process used for internet authentication and IP address assignment. I to seen all logs of this xx530v but it's all related to PPPOE , router does not showing any log related to Multipoint Control Protocol (MPCP). in log we wont able to see any GATE msg related logs.

  @Kevin_Z  @IndrajitIG 

Hi @Kevin_Z seems like the firmware share to us on mail fixed the issue. I tried but it did not got stuck to registration  loop till now. 

Hi @Ram_Eswar, Are you able to reproduce it with the new firmware?

  @IndrajitIG  Hi, tommorow evening ill visit my farm where xx530v router was located, ill flash this firmware 0.9.0 and ill update you after few days observation.

  @Kevin_Z  Hi, yes today just now i updated xx530v firmware to 0.9.0, need to wait and see how it performs for week during random power cycles, ill keep update regarding findings on comming days. Thank