vio4
Virtio network device
Usage
vio* at virtio? flags 0x00
Overview
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.
Releases
29 releases since OpenBSD 5.3; the text changed 5 times.