Very Strange Behaviour of PTCL Modem

Ptcl Modem stop working on the particular ethernet port and when i change the ethernet port from ptcl modem it start wroking. It is a strange anyone can guide me on it


Without any more info, I think that it could be due to IPTV settings configured on the modem/router as one of the ethernet/lan ports is dedicated to it! You may check the 'Interface Grouping' page when you login to the router! If you don't use 'smart tv' service, then, you could delete the iptv connection settings from your modem/router and/or bring out the ethernet/lan port from the separate group into the other group with all the other ports!