NAME
vio —
VirtIO network device
SYNOPSIS
vio* at virtio? flags 0x00
DESCRIPTION
The vio driver provides support for the
virtio(4) network interface provided by bhyve, KVM, QEMU, VirtualBox,
and vmd(8).
Setting the bit 0x2 in the flags disables the RingEventIndex
feature. This can be tried as a workaround for possible bugs in host
implementations of vio at the cost of slightly
reduced performance.
Setting the bit 0x100 in the flags forces the interface to be always in promiscuous mode. This can be used as a workaround for a bug in QEMU before version 1.7.2 that prevents packets with a VLAN tag from being sent to the guest.
SEE ALSO
HISTORY
The vio driver first appeared in
OpenBSD 5.3.
AUTHORS
The vio driver was ported to
OpenBSD and improved by Stefan
Fritsch
<sf@sfritsch.de>. It is
based on the NetBSD vioif
driver by Minoura Makoto.