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xennet(4) [netbsd man page]

XENNET(4)						 BSD/xen Kernel Interfaces Manual						 XENNET(4)

xennet -- Xen frontend paravirtualized network interface SYNOPSIS
xennet* at xenbus? DESCRIPTION
The xennet interface forms the frontend part of the paravirtualized drivers used by Xen guest domains to have network connectivity. When the host domain is NetBSD, the endpoint of the xennet interface is a xvif(4) interface. In the XenStore, xvif and xennet are identified by ``vif'' (virtual interface) entries. Conceptually, frontends and backends drivers are similar to two Ethernet cards connected via a crossover cable. DIAGNOSTICS
xennet%d: can't read mac address, err %d The MAC address for this interface could not be read from XenStore. xennet%d: %s is not a valid mac address The MAC address specified in the configuration file of the newly created guest domain is invalid. xennet%d: using event channel %d The Xen event channel (virtual interrupt) ID associated to this xennet. xennet%d: using RX copy mode The xennet and its associated endpoint use copy mode for communication: packets are copied from one domain's memory to another. xennet%d: using RX flip mode The xennet and its associated endpoint use flip mode for communication: packets are passed by remapping memory pages between domains. SEE ALSO
ifmedia(4), xenbus(4), xvif(4), ifconfig(8) HISTORY
The xennet driver first appeared in NetBSD 3.0. AUTHORS
The xennet driver was written by Manuel Bouyer <> and Christian Limpach <>. BSD
January 8, 2011 BSD

Check Out this Related Man Page

XPCI(4) 						 BSD/xen Kernel Interfaces Manual						   XPCI(4)

xpci -- Xen frontend paravirtualized PCI pass-through driver SYNOPSIS
xpci* at xenbus? pci* at xpci? DESCRIPTION
The xpci driver is the frontend part of the PCI pass-through functionality that can be used by Xen guest domains to communicate with PCI devices. From a guest point of view, xpci is similar to a pci(4) bus, except that the guest talks with the PCI backend driver instead of the real physical device directly. When the host domain is NetBSD, the xpci driver is backed by a pciback(4) driver within the dom0. SEE ALSO
pci(4), pciback(4), xenbus(4) HISTORY
The xpci driver first appeared in NetBSD 5.1. AUTHORS
The xpci driver was written by Manuel Bouyer <>. SECURITY CONSIDERATIONS
As PCI passthrough offers the possibility for guest domains to send arbitrary PCI commands to a physical device, this has direct impact on the overall stability and security of the system. For example, in case of erroneous or malicious commands, the device could overwrite physi- cal memory portions, via DMA. BSD
January 8, 2011 BSD
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