I'm wondering if a VPN in layer 2 mode would work better for such cases. - Make all participants keep a connection with each other, each connection equivalent

I'm wondering if a VPN in layer 2 mode would work better for such cases. - Make all participants keep a connection with each other, each connection equivalent to an ethernet cable, and each participant a network switch. - Just like real switches, use spanning-tree to decide which connection is used for data and which is kept as redundancy. - Bring your own router/dhcp/etc I think that would be quite robust.