bhyve accepts any MAC address even foreign as long it is a unicast one. Reviewed by: ziaee MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D54372
@@ -25,7 +25,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd December 23, 2025
+.Dd December 26, 2025
.Dt BHYVE 8
.Os
.Sh NAME
@@ -551,6 +551,7 @@ If
is not specified, the MAC address is derived from a fixed OUI, and the
remaining bytes from an MD5 hash of the slot and function numbers and
the device name.
+If specified, it must be a unicast MAC address.
.Pp
The MAC address is an ASCII string in
.Xr ethers 5
@@ -517,8 +517,10 @@ Intel e82545 network interfaces support the following variables:
.It Sy Name Ta Sy Format Ta Sy Default Ta Sy Description
.It Va mac Ta MAC address Ta generated Ta
MAC address.
-If an explicit address is not provided,
-a MAC address is generated from a hash of the device's PCI address.
+If not specified, the MAC address is derived from a fixed OUI, and the
+remaining bytes from an MD5 hash of the slot and function numbers and
+the device name.
+If specified, it must be a unicast MAC address.
.El
.Ss Frame Buffer Settings
.Bl -column "password" "[IP:]port" "127.0.0.1:5900"
@@ -746,8 +748,10 @@ VirtIO network interfaces support the following variables:
.It Sy Name Ta Sy Format Ta Sy Default Ta Sy Description
.It Va mac Ta MAC address Ta generated Ta
MAC address.
-If an explicit address is not provided,
-a MAC address is generated from a hash of the device's PCI address.
+If not specified, the MAC address is derived from a fixed OUI, and the
+remaining bytes from an MD5 hash of the slot and function numbers and
+the device name.
+If specified, it must be a unicast MAC address.
.It Va mtu Ta integer Ta 1500 Ta
The largest supported MTU advertised to the guest.
.El