@terziyski thank you, I hope to solve the problem as soon as possible

@terziyski I have this error: Error Code: 85048 Invalid gateway address. Gateway address must be in the same subnet as the network and the host number cannot be binary values of all 0 or 1.

@TPint my internet provider has already activated multicast remotely, he told me that it will almost certainly not be necessary to activate it from the tp-link modem, but he is not sure about this....

@TPint I have Archer VR1200v and not Archer VR1200. I see that modems are very different, like VOIP, one has it, the other doesn't. For VR1200v the last firmware is "Archer_VR1200v(SP)v1_1.0.0 0.8.0...

@TPint Unfortunately, my modem does not have the IPTV section, I will provide you with the official guide from my internet provider (TIM): For optimized use (in multicast mode) of Video Live services...

OS: Windows 11 64 Bit Connection: TIM FTTC Fiber Country: Italy I need to configure TIM multicast, as requested by the same on this page in the "Fiber Connection" section (this forum doesn't let me...