@David-TP Hi, thanks for the answer, and thanks for the post I hadn't found. It says the option activates only v3 IGMP snooping, so I suppose v1/v2 are already activated, which implies my problems...

Hi I experience various issues with my Homekit setup, so I googled and finally read posts about activating IGMP option. Unfortunately, this option is missing on my web UI : I use router mode. Why is...