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.Dd April 7, 2011 .Dt XVIF 4 xen .Os .Sh NAME .Nm xvif .Nd Xen backend paravirtualized network interface .Sh SYNOPSIS .Cd pseudo-device xvif .Sh DESCRIPTION The .Nm interface forms the backend part of the paravirtualized drivers used by .Tn Xen domains to offer network connectivity.
p When the guest domain is .Nx , the endpoint of the .Nm interface is a .Xr xennet 4 interface. In the XenStore, .Nm xvif and .Nm xennet are identified by .Dq vif (virtual interface) entries.
p All .Nm interfaces follow the .Dq xvifXiY naming convention, where .Sq X represents the guest domain identifier, and .Sq Y an arbitrary identifier; most of the time, it is the frontend interface identifier, e.g. .Dq xennetY .
p For convenience, the MAC address of an .Nm interface is chosen by incrementing the third byte of the MAC address of the frontend device.
p Conceptually, frontends and backends drivers are similar to two Ethernet cards connected via a crossover cable. .Sh DIAGNOSTICS l -diag t "xvif%di%d: can't read %s/mac: %d" The MAC address for this interface could not be read from XenStore. t "xvif%di%d: %s is not a valid mac address" The MAC address specified in the configuration file of the newly created guest domain is invalid. t "xvif%di%d: Ethernet address %s" MAC address of the .Nm interface. .El .Sh SEE ALSO .Xr ifmedia 4 , .Xr xennet 4 , .Xr ifconfig 8 .Sh HISTORY The .Nm driver first appeared in .Nx 4.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Manuel Bouyer Aq Mt bouyer@NetBSD.org .