Help with virtual router

[Rémi Paeta]

Hello,
I contact you because I am studying the possibility of using Cloudstack for
my company.
I currently use bare-metal servers that are rented from a hosting provider.
I encounter a problem for the management of Public IPs. My hosting provider
gives me public IPs that are associated with a specific mac address. I must
use this mac address for an IP ou a group of IP.
Is there a way to specify the MAC address of the virtual router's external
network interface?
Thanks for your expert advice!