Using a VLAN

[ogs]

Spark must use the same IP range.
A VLan is not recommended at all because there is no benefit to isolate the speakers on a dedicated VLan.
Some protocols won't cross the networks or even sub-net because there are not meant for this use.

There can be a number of reasons for putting the speakers on a different VLAN, e.g. ensuring that only a selected number of airplay devices is visible to the connected iPhone while having a joint internet connection...

I am having major issues getting the Phantoms to work on a separate VLAN (both Phone and Phantom on same VLAN, same Class C subnet). If anyone has any ideas how to solve this, I am happy to hear about it.

What about using NAT of some kind? Mapping fixed IPs on one side to the Phantom IPs on the other network?