Just one SONOS Connect.

I considered that the router may be imposing client isolation of wireless and wired clients (though I can find no setting to control this). But...I have the SONOS and a wired PC with Controller on two ports of the same unmanaged switch and it won't work...It's as if the Sonos isn't getting an IP address assignment from the DHCP server which, in this case, doles out addresses in the 192.168.20.1xx range. Fing shows all other wired devices except SONOS. We even tried forcing the Connect's Mac ID to a specific IP address from an elevated command prompt but no workum...