Sonos & ASUS AX issues

I’ve has issues with my Sonos setup since installing it. It would sometimes disappear from the network, sometimes the app wouldn’t see the system etc. Today (after more than a year of disappointment) I was guided through an hour-long debugging session by the very helpful Jenny, which changed the following ASUS router settings from their defaults:

Advanced settings > LAN > IPTV > Enable multicast routing
Advanced settings > LAN > IPTV > Enable efficient multicast forwarding (IGMP Snooping)
Advanced settings > Wifi > Professional > Enable IGMP Snooping

Also, check if the firmware of the router and mesh nodes are up to date, and whether the Sonos app displays any other (old/concurrent) Wifi networks (otherwise the system might keep switching back and forth).

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