Setting a static IP address using network bridge

I am setting the IP address of the container using a patch request.

This morning i have powered up and eventually (there is a delay maybe 1 minute) the containers are assigned a static ip address, but not the one i set with LXC.

e.g. I set 192.168.1.100 , I get 192.168.1.43 , so it seems that I am setting the IP but i am being assigned by DHCP.