Fail over IP Block in VLAN

Hello friends,

recently I got a new Fail over IP Block. I want to setup this block in a VLAN. Normally I will do it in my pfSense firewall as always when I want to create the VLAN, just assign the VLAN tag and set the network information. In this case it is not a private network, it is a Public IP Block, maybe the situation is different for a VLAN, I was setting up the gateway, but so far im not able to make it work. At this point I'm thinking to setup the external network with a VLAN using the openstack tools(I will just try but i dont know if it is the way to go).

Somebody have experience with this? IP Block in a VLAN with vrack?

Thanks in advance.

Please if more information is needed let me know