Phantom II Custom 5.0 surround system experience and suggestions

[Yondu]

This was where I went wrong I didn’t realise it had 2 IP addresses!

Yeap

It is generaly the case when you have Dante / AES 67 products
In certain case, more for amps/preamps you have also separated network interfaces. Most of case two for Dante (one Primary, one secondary) and one for accessing to the management (webpage or with an amp). (Example the JBL Synthesis SDP-55/58 has 3 ethernet connectors, Lyngdorf and Stormaudio too)