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Qemu-system-x86_64 -hda /path/to/hda.img -netdev user,id=user.0 -device e1000,netdev=user.0 The default is equivalent to this explicit setup:.If you run multiple guests on the host, you don't need to specify a different MAC address for each guest.The IP address can be automatically assigned to the guest thanks to the DHCP service integrated in QEMU.Simply run your guest without specifying network parameters, which by default will create user-level (a.k.a slirp) networking:.In order for the guest to be able to access the internet or a local network, the host system must be able to access these resources as well.If you don't want to run as root, then the user needs to have rw access to /dev/kvm.Certain applications (like ping) may not function properly. Warning: User networking does not support a number of networking features like ICMP.You are ready to take a huge performance hit.You don't need to access your guest from the network or from another guest.You want a simple way for your virtual machine to access to the host, to the internet or to resources available on your local network.This page will try to explain how to configure the most frequent types of networking needed. Guest (VM) networking in kvm is the same as in qemu, so it is possible to refer to other documentation about networking in qemu.
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