-.\" $OpenBSD: vlan.4,v 1.44 2016/04/28 21:32:11 dlg Exp $
+.\" $OpenBSD: vlan.4,v 1.45 2017/06/08 01:17:01 dlg Exp $
.\"
.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd $Mdocdate: April 28 2016 $
+.Dd $Mdocdate: June 8 2017 $
.Dt VLAN 4
.Os
.Sh NAME
.Nm vlan ,
.Nm svlan
-.Nd IEEE 802.1Q/1AD pseudo-device
+.Nd IEEE 802.1q and 802.1ad pseudo-device
.Sh SYNOPSIS
.Cd "pseudo-device vlan"
.Sh DESCRIPTION
.Sh CAVEATS
Some Ethernet chips will either discard or truncate
Ethernet frames that are larger than 1514 bytes.
-This causes a problem as 802.1Q tagged frames can be up to 1518 bytes.
+This causes a problem as 802.1q and 802.1ad tagged frames can be
+up to 1518 bytes.
Most controller chips can be told not to discard large frames
and/or to increase the allowed frame size.