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NG_VLAN(4)	       FreeBSD Kernel Interfaces Manual		    NG_VLAN(4)

NAME
     ng_vlan --	IEEE 802.1Q VLAN tagging netgraph node type

SYNOPSIS
     #include <netgraph/ng_vlan.h>

DESCRIPTION
     The vlan node type	multiplexes frames tagged according to the IEEE	802.1Q
     standard between different	hooks.

     Each node has two special hooks, downsteam	and nomatch, and an arbitrary
     number of ``vlan''	hooks, each associated with a particular VLAN tag.

     An	ETHERTYPE_VLAN frame received on the downstream	hook with a tag	that
     the node has been configured to filter is sent out	the corresponding
     ``vlan'' hook.  If	it does	not match any of the configured	tags, or is
     not of a type ETHERTYPE_VLAN, it is sent out the nomatch hook.  If	the
     nomatch hook is not connected, the	packet is dropped.

     An	Ethernet frame received	on the nomatch hook is passed unmodified to
     the downstream hook.

     An	Ethernet frame received	on any of the ``vlan'' hooks is	tagged accord-
     ingly and sent out	the downstream hook.

HOOKS
     This node type supports the following hooks:

     downstream	 Typically this	hook would be connected	to a ng_ether(4) node,
		 using the lower hook.

     nomatch	 Typically this	hook would also	be connected to	an ng_ether(4)
		 type node using the upper hook.

     <any valid	name>
		 Any other hook	name will be accepted and should later be
		 associated with a particular tag.  Typically this hook	would
		 be attached to	an ng_eiface(4)	type node using	the ether
		 hook.

CONTROL	MESSAGES
     This node type supports the generic control messages, plus	the following:

     NGM_VLAN_ADD_FILTER (addfilter)
	     Associates	a hook with the	tag.

     NGM_VLAN_DEL_FILTER (delfilter)
	     Disassociates a hook from the tag.

     NGM_VLAN_GET_TABLE	(gettable)
	     Returns a table of	all hook/tag associations.

EXAMPLES
     #!/bin/sh

     ETHER_IF=rl0

     ngctl -f- <<EOF
     shutdown ${ETHER_IF}:
     mkpeer ${ETHER_IF}: vlan lower downstream
     name ${ETHER_IF}:lower vlan
     connect ${ETHER_IF}: vlan:	upper nomatch
     EOF

     ngctl mkpeer vlan:	eiface vlan123 ether
     ngctl msg vlan: addfilter '{ vlan=123 hook="vlan123" }'

SHUTDOWN
     This node shuts down upon receipt of a NGM_SHUTDOWN control message, or
     when all hooks have been disconnected.

SEE ALSO
     netgraph(4), ng_eiface(4),	ng_ether(4), ngctl(8), nghook(8)

HISTORY
     The ng_vlan node type appeared in FreeBSD 4.10.

AUTHORS
     Ruslan Ermilov <ru@FreeBSD.org>

FreeBSD	10.1			 March 1, 2004			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HOOKS | CONTROL MESSAGES | EXAMPLES | SHUTDOWN | SEE ALSO | HISTORY | AUTHORS

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