document the use of llprio for tranmistted packets with link0

1 files changed, 17 insertions, 3 deletions

diff --git a/share/man/man4/vlan.4 b/share/man/man4/vlan.4
index 13b7e714ccd..00881e4d257 100644
--- a/share/man/man4/vlan.4
+++ b/share/man/man4/vlan.4
@@ -1,4 +1,4 @@
-.\" $OpenBSD: vlan.4,v 1.47 2018/03/18 03:37:51 lteo Exp $
+.\" $OpenBSD: vlan.4,v 1.48 2018/04/03 02:56:57 dlg Exp $
 .\"
 .\" Copyright (c) 2000 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: March 18 2018 $
+.Dd $Mdocdate: April 3 2018 $
 .Dt VLAN 4
 .Os
 .Sh NAME
@@ -83,12 +83,19 @@ interfaces by their respective protocol and virtual network
 identifiers, and decapsulated for reception on the associated virtual
 interfaces.
 .Pp
-The 802.1Q and 802.1ad protocols include a priority field which may
+The 802.1Q and 802.1ad protocols include a priority field.
+By default, the priority of transmitted packet is based on the
+priority of packets sent over the interface, which may
 be altered via
 .Xr pf.conf 5 ;
 see the
 .Cm prio
 option for more information.
+Alternatively, the
+.Cm link0
+flag may be set use the interfaces
+.Cm llprio
+value for transmitted packets.
 .Pp
 .Nm vlan
 and
@@ -172,6 +179,13 @@ Remove a custom MAC address from an 802.1Q VLAN interface:
 .Bd -literal -offset indent
 # ifconfig vlan0 lladdr 00:00:00:00:00:00
 .Ed
+.Pp
+Force the use of priority 1 for transmitted packets, regardless of
+the packet priority:
+.Bd -literal -offset indent
+# ifconfig vlan0 llprio 1
+# ifconfig vlan0 link0
+.Ed
 .Sh SEE ALSO
 .Xr inet 4 ,
 .Xr ip 4 ,