Virtualization

How to emulate NO-CARRIER state for tap interface

There is an obscure fact about Linux: when Linux shut down an interface (ip link set down dev eno1), it does not bring PHY down. Contrary, if you do conf t; int te 1/0/1; shutdown on a real hardware switch, it does.

Linux: how to completely disable keyboard for a virtual machine under KVM

It’s a simple problem: we want to have an instance which ignores all user input.

The problem can be split into two parts:

• disable all Linux interaction…