I have the latest version of Roon Core Server x64 for Windows installed on a Dell PowerEdge R620 server. That server is connecting to ~27TB Raid10 via a HBA to a SAS Expander housing 15x4tb drives. I also have a separate Dell PowerEdge R420 server being used as a Synology NAS, but it’s just for backup, mirroring, redundancy of my media files stored on the R620 server. It has 4x10tb HDDs in a raid 5 for storage, but again has nothing to do with Roon, unless the R620 server goes down. I also have my main gaming rig. All three are connected via cat 7 to the netgear xs708t NETGEAR switch which is managed. This switch was the most basic 10GBE switch I could find with sfp+ and Ethernet Jack’s to support all three nodes at the fastest speed to expedite multi-tb media file moves. IGMP & MULTICAST is disabled on it, unless I’m missing something. The behavior with Roon has occurred since day one. My router is just a descent ASUS router that provides dhcp and WiFi to my network located in another closet. The router is linking the NETGEAR switch and my other nodes through a Cisco unmanaged switch and from there it goes directly into the NETGEAR switch.
To clarify: Internet Gateway>ASUS WIFI Router>Cisco Dumb Switch>NETGEAR xs708t managed switch>Dell R620 server/Dell R420/COSMOS Gaming Rig. My remotes are my LG V20 Android phone running Nougat, and I have roonbridge and the Roon GUI app running on a Win10 Lenovo Tablet in my main listening room connected via a generic and separate dumb switch via Ethernet back to the aforementioned Cisco dumb switch in my wiring cabinet. I have one HIFIBERRY in another zone connected to another Cisco dumb switch via Ethernet that connects back to the aforementioned original Cisco dumb switch. My COSMOS Gaming rig is a 3rd zone Running both Roonbridge and the GUI APP via WIN10 connected via 10GBE CA to back to the XS708T NETGEAR switch.