[Neutron] Can I create VM on flat network which doesnt have any subnet attached to it.

Hello Team, Hope you all are doing good. I wanted to know that can I launch a VM on a flat network directly which doesn't have any subnet attached to it. Steps to be followed: Create a flat Network without a subnet Attach the network to create a VM. Aim :- Spawn 2 VM's on network without any subnet, without any IP assigned to them. Then statically allocate same subnet IP to them and ping each other. Issue:- VM creation is getting failed stating that there is no subnet found. How can we resolve this? Thanks & Regards Akshay