pve 4.2 kvm multiple ip public vhost vserver

Hey guys, i've the following setup 1 vServer, 1 NIC with 2 public IPv4 addresses the hoster does not provice another eth interface for the second address. so i'm "stuck" with eth0 & eth0:1 the network setup on my proxmox pve host looks is like this: eth0 1 IP in a /22 netmask // on vmbr0 (see...