On 15/11/2020 17:27, Andrew Lunn wrote: > So check if you have an IGMP querier in the network. If not, try > turning it on in the bridge, > > ip link set br0 type bridge mcast_querier 1
Thanks Andrew - that does indeed seem to have solved the issue. I'm relieved this isn't a hardware or driver issue after all but annoyed we didn't figure this out ourselves months ago! Is there any other kernel 'nob' to alter this? I'm trying to understand why we're seeing two different results with seemingly identical kernel/OS versions and network configurations.