Installed Xen on a server at home, recently moved it to a data center. Worked fine with DHCP behind my router, with each virtual server and the dom0 getting its own IP address.
At the data center, there's plenty of IP addresses to use, but they all need to be static. I managed to get the dom0 setup with a static IP like this, but I'm not sure where to go from here.
auto eth0 iface eth0 inet static address 18.104.22.168 netmask 255.255.255.248 gateway 22.214.171.124