system/devices/net.rst

3 Network emulation
6 QEMU can simulate several network cards (e.g. PCI or ISA cards on the PC
7 target) and can connect them to a network backend on the host or an
8 emulated hub. The various host network backends can either be used to
9 connect the NIC of the guest to a real network (e.g. by using a TAP
10 devices or the non-privileged user mode network stack), or to other
12 socket host network backend).
14 Using TAP network interfaces
17 This is the standard way to connect QEMU to a real network. QEMU adds a
18 virtual network device on your host (called ``tapN``), and you can then
28 TAP network interfaces: the device ``/dev/net/tun`` must be present.
31 lines using the TAP network interfaces.
41 Using the user mode network stack
45 option is specified), QEMU uses a completely user mode network stack
46 (you don't need root privilege to use the virtual network). The virtual
47 network configuration is the following::
58 configure the network in the QEMU VM. The DHCP server assign addresses
61 In order to check that the user mode network is working, you can ping
80 Using passt as the user mode network stack
129 be migrated with QEMU and the network connections are not interrupted.
184 connection between several network devices. These devices can be for
186 (TAP devices). You can connect guest NICs or host network backends to