To add additional IPs to a single network interface add the example
config below to your
auto eth0:0 iface eth0:0 inet static address 192.168.40.200 netmask 255.255.255.0 network 192.168.40.0 broadcast 192.168.40.255 gateway 192.168.40.1 auto eth0:1 iface eth0:1 inet static address 192.168.50.200 netmask 255.255.255.0 network 192.168.50.0 broadcast 192.168.50.255 gateway 192.168.50.1
This presumes that your existing interface is called
eth0. It can be
checked by running the
ifconfig command. Ensure that your virtual
interfaces start with a 0 and not a 1.