Connection problems/IP issues? with Avid Control and Avid Dock

[Voldemort]

Hi,

MY RIG:
Mac studio (M1 - OS monterey) - connected to internet via ethernet input Mac.
Pro Tools HDX card in external chassis connected to Mac.

DAD DX32 converter, connected to Mac LAN via satechi adapter, ethernet to USB-C.

Avid Dock and Avid Control on iPad:
Avid dock, ethernet to unmanaged ethernet switch, TP-link SG105S.
iPad with wifi off, via USB-C to ethernet adapter into the switch.
Switch connected to Mac LAN via ethernet adapter, erhernet to USB- C.

Running DADMAN, EuControl and Pro Tools Ultimate on Mac. All software downloaded and installed two weeks ago.

MY PROBLEM:
When giving static IP to DX32 connection, DADMAN seems to work perfectly. Good. I used 192.168.3.1.

I gave the switch on USB LAN 2 (with Dock and iPad connected) DHCP.

Suddenly everything worked. I checked IP settings in Mac Network panel (USB LAN 2 = 169.254.183.147 (subnet 255.255.0)). In EUControl, Dock was assigned with 169.254.175.48:49168 and iPad/Avid Control with 169.254.51.16:588379.

Then I started to program a soft key on Avid Dock in EUControl. I returned to Pro Tools to test the key, which didnt work. Then I noticed that Avid Control was «blank» - the not connected to eucon icon was not visible … but no info and no response from actions in DADMAN.

I restarted an hoped for the best … not working. Dock and iPad visible in eucon my surfaces, but no response/monitor profile from DADMAN (monitor profile assigned in eucon). Checked Macs network panel, the switch on USB LAN 2, had a new IP: 169.254.165.78 (yesterday 168.254.183.147), but in EUControl, the Dock and the iPad had the exact same IPs as before the restart …

Sorry for the long post … Is this perhaps my problem? The switch and IP issues?
Does anybody know what I am doing wrong?