How to create new sys-net?

[unman]

You just create a new app qube, choose that it ???Provides network??? in its Settings, and it should work.

Well, you’ll also need to set “Net qube” to none,Mode to “HVM”,
disable memory balancing, set “autostart”, adjust memory, and enable clock-sync.
Then you’ll need to attach your NICs, and possibly configure strict
reset.

Alternatively, run :
qubesctl state.apply qvm.sys-net

I suggest you clone the exiting sys-net before deleting it.

I never presume to speak for the Qubes team.
When I comment in the Forum or in the mailing lists I speak for myself.