[pulseaudio-discuss] About RTP for multi-room

[Damien]

Hi,

> You need to have IGMP snooping enabled on your switch to
> prevent packets going to destinations that have not subscribed
> to the multicast stream.
Thanks for the IGMP keyword!
Unfortunately I can't find a way to enable this option on the router.
I'll ask the provider.

> Maybe it helps if you exclude the loopback interface (not sure
> if the multicast is received on the loopback however):
> iptables -A OUTPUT -d 224.0.0.56 ! -o lo -j DROP
No, it doesn't work, all packets are dropped. I guess because sent
packets are not assigned an interface at this point...

Damien