Is UPnP a rubish protocol ???

[lyapounov]

(09-03-2022 15:05)simoncn Wrote:  IGMP proxy is different from IGMP snooping. A web search suggests that the C1200 supports IGMP snooping (see for example this page). Also, as there is a choice between IGMP v2 and v3, it is likely that the router is using IGMP snooping. Can you try a different router that has a configuration setting to disable IGMP snooping?

It happened that I had a spare Asus router which does offer IGMP snooping management.

I confirm that there is no more of such issue.

Before this I tried with a switch which manages IGMP snooping between my synology and my renderer but that did not work.

Thx Simon