Thanks for you answer.
My last question : if I activate the IGMP Snooping functionality, the bridge will remain offloaded ?
Thanks,
Laurent
yep, but I do not have access to such level of configuration with SwOS.So your configuration must be like here, Other Devices with built in Switch Chip https://wiki.mikrotik.com/wiki/Manual: ... witch_chip
Yes RB260 has this chip, AR8327...