Index: etc/network.subr
===================================================================
--- etc/network.subr	(revision 201134)
+++ etc/network.subr	(working copy)
@@ -971,7 +971,7 @@
 #
 childif_create()
 {
-	local cfg child child_wlans create_args debug_flags ifn i
+	local cfg child child_vlans child_wlans create_args debug_flags ifn i
 	cfg=1
 	ifn=$1
 
@@ -999,6 +999,32 @@
 		fi
 	done
 
+	# Create vlan interfaces
+	child_vlans=`get_if_var $ifn vlans_IF`
+
+	if [ -n "${child_vlans}" ]; then
+		load_kld if_vlan
+	fi
+
+	for child in ${child_vlans}; do
+		if expr $child : '[1-9][0-9]*$' >/dev/null 2>&1; then
+			child="${ifn}.${child}"
+			create_args=`get_if_var $child create_args_IF`
+			ifconfig $child create ${create_args} && cfg=0
+		else
+			create_args="vlandev $ifn `get_if_var $child create_args_IF`"
+			if expr $child : 'vlan[0-9][0-9]*$' >/dev/null 2>&1; then
+				ifconfig $child create ${create_args} && cfg=0
+			else
+				i=`ifconfig vlan create ${create_args}`
+				ifconfig $i name $child && cfg=0
+			fi
+		fi
+		if autoif $child; then
+			ifn_start $child
+		fi
+	done
+
 	return ${cfg}
 }
 
@@ -1007,14 +1033,34 @@
 #
 childif_destroy()
 {
-	local cfg child child_wlans ifn
+	local cfg child child_vlans child_wlans ifn
 	cfg=1
 
 	child_wlans="`get_if_var $ifn wlans_IF` `get_if_var $ifn vaps_IF`"
 	for child in ${child_wlans}; do
+		if ! ifexists $child; then
+			continue
+		fi
+		if autoif $child; then
+			ifn_stop $child
+		fi
 		ifconfig $child destroy && cfg=0
 	done
 
+	child_vlans=`get_if_var $ifn vlans_IF`
+	for child in ${child_vlans}; do
+		if expr $child : '[1-9][0-9]*$' >/dev/null 2>&1; then
+			child="${ifn}.${child}"
+		fi
+		if ! ifexists $child; then
+			continue
+		fi
+		if autoif $child; then
+			ifn_stop $child
+		fi
+		ifconfig $child destroy && cfg=0
+	done
+
 	return ${cfg}
 }
 
Index: etc/defaults/rc.conf
===================================================================
--- etc/defaults/rc.conf	(revision 201134)
+++ etc/defaults/rc.conf	(working copy)
@@ -213,6 +213,8 @@
 #ifconfig_ed0_ipv6="inet6 2001:db8:1::1 prefixlen 64" # Sample IPv6 addr entry
 #ifconfig_ed0_alias0="inet6 2001:db8:2::1 prefixlen 64" # Sample IPv6 alias
 #ifconfig_fxp0_name="net0"	# Change interface name from fxp0 to net0.
+#vlans_fxp0="101 vlan0"		# vlan(4) interfaces for fxp0 device
+#create_arg_vlan0="vlan 102"	# vlan tag for vlan0 device
 #wlans_ath0="wlan0"		# wlan(4) interfaces for ath0 device
 #wlandebug_wlan0="scan+auth+assoc"	# Set debug flags with wlanddebug(8)
 #ipv4_addrs_fxp0="192.168.0.1/24 192.168.1.1-5/28" # example IPv4 address entry.
Index: share/man/man5/rc.conf.5
===================================================================
--- share/man/man5/rc.conf.5	(revision 201134)
+++ share/man/man5/rc.conf.5	(working copy)
@@ -1156,6 +1156,45 @@
 variables.
 .Pp
 If a
+.Va vlans_ Ns Aq Ar interface
+variable is set,
+a
+.Xr vlan 4
+interface will be created for each item in the list with the
+.Ar vlandev
+argument set to
+.Ar interface .
+If a vlan interface's name is a number,
+then that number is used as the vlan tag and the new vlan interface is
+named
+.Ar interface . Ns Ar tag .
+Otherwise,
+the vlan tag must be specified via a
+.Va vlan
+parameter in the
+.Va create_args_ Ns Aq Ar interface
+variable.
+.Pp
+To create a vlan device named
+.Li em0.101
+on
+.Li em0
+with the vlan tag 101:
+.Bd -literal
+vlans_em0="101"
+.Ed
+.Pp
+To create a vlan device named
+.Li myvlan
+on
+.Li em0
+with the vlan tag 102:
+.Bd -literal
+vlans_em0="myvlan"
+create_args_myvlan="vlan 102"
+.Ed
+.Pp
+If a
 .Va wlans_ Ns Aq Ar interface
 variable is set,
 an
@@ -1222,7 +1261,7 @@
 options in this variable, in addition to the
 .Pa /etc/start_if. Ns Aq Ar interface
 file.
-For instance, configure an
+For instance, to configure an
 .Xr ath 4
 wireless device in station mode with an address obtained 
 via DHCP, using WPA authentication and 802.11b mode, it is
@@ -1244,7 +1283,7 @@
 .Va pccard_ifconfig
 variable.
 .Pp
-It is also possible to rename interface by doing:
+It is also possible to rename an interface by doing:
 .Bd -literal
 ifconfig_ed0_name="net0"
 ifconfig_net0="inet 192.0.2.1 netmask 0xffffff00"
@@ -1355,6 +1394,12 @@
 .It Va cloned_interfaces
 .Pq Vt str
 Set to the list of clonable network interfaces to create on this host.
+Further cloning arguments may be passed to the
+.Xr ifconfig 8
+.Cm create
+command for each interface by setting the
+.Va create_args_ Ns Aq Ar interface
+variable.
 Entries in
 .Va cloned_interfaces
 are automatically appended to