Additional IPs for a host

Hello all,
I have a dedicated server, running ESXi 6, for a lab environment. I recently had some problems trying to provide outbound access for the VMs, as I can't use the host's own address for this purpose.
So... I've ordered 4 more IP addresses, through OVH, for RIPE.
I'm not sure exactly what I need to do when I get them (or how long that's likely to take).
I'm fairly happy on the ESXi side of things, but presumably I can't just go assigning routable IPv4 addresses to the host, and hope the switch just agrees that the host's MAC address is supposed to be ARPing those addresses.
Does anyone know what I'll need to do to configure these addresses on the OVH control panel side of things? I didn't get much when searching the community.
In the meantime, I guess I'll just try getting IPv6 working while I wait for RIPE and OVH.