Setting up a dummy interface If you want to create network interfaces, but lack a physical NIC to back it, you can use the dummy link type. You can read more about them here: iproute2 Wikipedia page. Creating eth10 To make this interface you'd first need to make sure that you have the dummy kernel module loaded. You can do this like so: $ sudo lsmod | grep dummy $ sudo modprobe dummy $ sudo lsmod | grep dummy dummy 12960 0 With the driver now loaded you can create what ever dummy network interfaces you like: $ sudo ip link add eth10 type dummy NOTE: In older versions of ip you'd do the above like this, appears to have changed along the way. Keeping this here for reference purposes, but based on feedback via comments, the above works now. $ sudo ip link set name eth10 dev dummy0 And confirm it: $ ip link show eth10 6: eth10:
mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/ether c6:ad:af:42:80:45 brd ff:ff:ff:ff:ff:ff Changing the MAC You can then change the MAC address if you like: $ sudo ifconfig eth10 hw ether 00:22:22:ff:ff:ff $ ip link show eth10 6: eth10: mtu 1500 qdisc noop state DOWN mode DEFAULT group default link/ether 00:22:22:ff:ff:ff brd ff:ff:ff:ff:ff:ff Creating an alias You can then create aliases on top of eth10. $ sudo ip addr add 192.168.100.199/24 brd + dev eth10 label eth10:0 And confirm them like so: $ ifconfig -a eth10 eth10: flags=130 mtu 1500 ether 00:22:22:ff:ff:ff txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 $ ifconfig -a eth10:0 eth10:0: flags=130 mtu 1500 inet 192.168.100.199 netmask 255.255.255.0 broadcast 192.168.100.255 ether 00:22:22:ff:ff:ff txqueuelen 0 (Ethernet) Or using ip: $ ip a | grep -w inet inet 127.0.0.1/8 scope host lo inet 192.168.1.20/24 brd 192.168.1.255 scope global wlp3s0 inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 inet 192.168.100.199/24 brd 192.168.100.255 scope global eth10:0 Removing all this? If you want to unwind all this you can run these commands to do so: $ sudo ip addr del 192.168.100.199/24 brd + dev eth10 label eth10:0 $ sudo ip link delete eth10 type dummy $ sudo rmmod dummy
Here is what the above code is Doing:
1. Load the dummy kernel module.
2. Create a dummy interface called eth10.
3. Change the MAC address of eth10.
4. Create an alias on top of eth10 called eth10:0.
5. Remove the alias.
6. Remove the dummy interface.
7. Unload the dummy kernel module.