2 files changed, 17 insertions, 0 deletions

diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
index a9c6a21db08e3..2812eb3394be1 100644
--- a/sbin/ifconfig/ifconfig.8
+++ b/sbin/ifconfig/ifconfig.8
@@ -450,6 +450,19 @@ This breaks the link between the
 .Xr vlan 4
 interface and its parent,
 clears its VLAN tag, flags and its link address and shuts the interface down.
+.It Cm vlanmtu , vlanhwtag
+If the driver offers user-configurable VLAN support, enable
+reception of extended frames or tag processing in hardware,
+respectively.
+Note that this must be issued on a physical interface associated with
+.Xr vlan 4 ,
+not on a
+.Xr vlan 4
+interface itself.
+.It Fl vlanmtu , Fl vlanhwtag
+If the driver offers user-configurable VLAN support, disable
+reception of extended frames or tag processing in hardware,
+respectively.
 .It Cm metric Ar n
 Set the routing metric of the interface to
 .Ar n ,
diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index b35ed9e9f0957..8070bfe776426 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -285,6 +285,10 @@ struct	cmd {
 	{ "-netcons",	-IFCAP_NETCONS,	setifcap },
 	{ "polling",	IFCAP_POLLING,	setifcap },
 	{ "-polling",	-IFCAP_POLLING,	setifcap },
+	{ "vlanmtu",	IFCAP_VLAN_MTU,		setifcap },
+	{ "-vlanmtu",	-IFCAP_VLAN_MTU,	setifcap },
+	{ "vlanhwtag",	IFCAP_VLAN_HWTAGGING,	setifcap },
+	{ "-vlanhwtag",	-IFCAP_VLAN_HWTAGGING,	setifcap },
 	{ "normal",	-IFF_LINK0,	setifflags },
 	{ "compress",	IFF_LINK0,	setifflags },
 	{ "noicmp",	IFF_LINK1,	setifflags },