Second loopback network interface (for netem) I would like to add a second loopback network device on Linux, so that I have `lo` and (e.g.) `lo2`. This is so that I can use netem to simulate a throttled network over lo2 without compromising my standard loopback interface. Note that I can not use an alias interface here (such as lo:1) since netem will affect the underlying (lo) interface, not the interface alias. How can that be done?

Can you add a virtual tap device and do the testing on that?


ip tuntap add dev tap0 mode tap


You may need to insert the `tun` module first.


modprobe tun