• AMD PCNet PCI II (Am79C970A); • AMD PCNet FAST III (Am79C973, the default); • Intel PRO/1000 MT Desktop (82540EM); • Intel PRO/1000 T Server (82543GC); • Intel PRO/1000 MT Server (82545EM); • Paravirtualized network adapter (virtio-net). The PCNet FAST III is the default because it is supported by nearly all operating systems out of the box, as well as the GNU GRUB boot manager. As an exception, the Intel PRO/1000 family adapters are chosen for some guest operating system types that no longer ship with drivers for the PCNet card, such as Windows Vista. The Intel PRO/1000 MT Desktop type works with Windows Vista and later versions. The T Server variant of the Intel PRO/1000 card is recognized by Windows XP guests without additional driver installation. The MT Server variant facilitates OVF imports from other platforms. The 'Paravirtualized network adapter (virtio-net)' is special. If you select this, then VirtualBox does not virtualize common networking hardware (that is supported by common guest operating systems out of the box). Instead, VirtualBox then expects a special software interface for virtualized environments to be provided by the guest, thus avoiding the complexity of emulating networking hardware and improving network performance. Starting with version 3.1, VirtualBox provides support for the industry-standard 'virtio' networking drivers, which are part of the open-source KVM project. The 'virtio' networking drivers are available for the following guest operating systems. AMD PCNET Family PCI Ethernet Adapter. Clicking on the Download Now. Ethernet Driver Download. Machine or system image does not have an AMD PCnet-PCI-II compatible Ethernet adapter, it can migrate. The AMD PCnetHL driver from AMD download site. • Linux kernels version 2.6.25 or later can be configured to provide virtio support; some distributions also back-ported virtio to older kernels. • For Windows 2000, XP and Vista, virtio drivers can be downloaded and installed from the KVM project web page. [] VirtualBox also has limited support for so-called jumbo frames, i.e. Networking packets with more than 1500 bytes of data, provided that you use the Intel card virtualization and bridged networking. In other words, jumbo frames are not supported with the AMD networking devices; in those cases, jumbo packets will silently be dropped for both the transmit and the receive direction. Guest operating systems trying to use this feature will observe this as a packet loss, which may lead to unexpected application behavior in the guest. Pci Download DriverThis does not cause problems with guest operating systems in their default configuration, as jumbo frames need to be explicitly enabled. Not attached In this mode, VirtualBox reports to the guest that a network card is present, but that there is no connection -- as if no Ethernet cable was plugged into the card. This way it is possible to 'pull' the virtual Ethernet cable and disrupt the connection, which can be useful to inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail inside the guest, then this default mode should be sufficient for you, and you can safely skip the rest of this section. Amd Pcnet Driver![]() Amd Am79c970a DriverPlease note that there are certain limitations when using Windows file sharing (see for details). NAT Network The NAT network is a new NAT flavour introduced in VirtualBox 4.3. See for details. Bridged networking This is for more advanced networking needs such as network simulations and running servers in a guest. When enabled, VirtualBox connects to one of your installed network cards and exchanges network packets directly, circumventing your host operating system's network stack. Internal networking This can be used to create a different kind of software-based network which is visible to selected virtual machines, but not to applications running on the host or to the outside world.
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