seting IP on nebula in peseudo brige clone mode

I’m configuring a nebula in peseudo brige clone mode
in this way the client back to the network interface eth0 of the nebula obtained from the DHCP on my network the ip assigned. How can I configure an IP address on the nebula in order to make the management ??
I tried to assign to the interface or to bridge a WIFI ip but does not work (even setting the DHCP on one of the two interfaces)