I need Omega2sp to have two different networks over one Ethernet wire.
On Linux it could be done something like this:
iface eth0 inet static
address 192.168.2.150
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.253
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 8.8.4.4
iface eth0:1 inet static
address 192.168.2.2
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.253
or
ip addr add 192.168.2.2/24 brd + dev eth0 label eth0:0