NAME

       vlan - vlan manipulation module

SYNOPSIS

       tc ... action vlan { pop | pop_eth | PUSH | MODIFY | PUSH_ETH } [ CONTROL ]

       PUSH := push [ protocol VLANPROTO ]  [ priority VLANPRIO ] id VLANID

       MODIFY := modify [ protocol VLANPROTO ]  [ priority VLANPRIO ] id VLANID

       PUSH_ETH := push_eth dst_mac LLADDR src_mac LLADDR

       CONTROL := { reclassify | pipe | drop | continue | pass | goto chain CHAIN_INDEX }

DESCRIPTION

       The  vlan  action  allows  to perform 802.1Q en- or decapsulation on a packet, reflected by the operation
       modes POP, PUSH and MODIFY.  The POP mode is simple, as no further information is required to  just  drop
       the  outer-most  VLAN  encapsulation.  The  PUSH  and MODIFY modes require at least a VLANID and allow to
       optionally choose the VLANPROTO to use.

       The vlan action can also be used to add or remove the base Ethernet header. The pop_eth mode, which takes
       no argument, is used to remove the base Ethernet header. All existing VLANs  must  have  been  previously
       dropped.  The  opposite operation, adding a base Ethernet header, is done with the push_eth mode. In that
       case, the packet must have no MAC header (stacking MAC headers is not permitted).  This  mode  is  mostly
       useful  when  a previous action has encapsulated the whole original frame behind a network header and one
       needs to prepend an Ethernet header before forwarding the resulting packet.

OPTIONS

       pop    Decapsulation mode, no further arguments allowed.

       push   Encapsulation mode. Requires at least id option.

       modify Replace mode. Existing 802.1Q tag is replaced. Requires at least id option.

       pop_eth
              Ethernet header decapsulation mode. Only works on a plain Ethernet header: VLANs, if any, must  be
              removed first.

       push_eth
              Ethernet  header  encapsulation  mode. The Ethertype is automatically set using the network header
              type. Chaining Ethernet headers is not allowed: the packet must have no MAC header when using this
              mode. Requires the dst_mac and src_mac options.

       id VLANID
              Specify the VLAN ID to encapsulate into.  VLANID is an  unsigned  16bit  integer,  the  format  is
              detected automatically (e.g. prefix with '0x' for hexadecimal interpretation, etc.).

       protocol VLANPROTO
              Choose  the  VLAN  protocol  to  use.  At  the  time of writing, the kernel accepts only 802.1Q or
              802.1ad.

       priority VLANPRIO
              Choose the VLAN priority to use. Decimal number in range of 0-7.

       dst_mac LLADDR
              Choose the destination MAC address to use.

       src_mac LLADDR
              Choose the source MAC address to use.

       CONTROL
              How to continue after executing this action.

              reclassify
                     Restarts classification by jumping back to the  first  filter  attached  to  this  action's
                     parent.

              pipe   Continue with the next action, this is the default.

              drop   Packet will be dropped without running further actions.

              continue
                     Continue classification with next filter in line.

              pass   Return to calling qdisc for packet processing. This ends the classification process.

EXAMPLES

       The following example encapsulates incoming ICMP packets on eth0 from 10.0.0.2 into VLAN ID 123:

              #tc qdisc add dev eth0 handle ffff: ingress
              #tc filter add dev eth0 parent ffff: pref 11 protocol ip \
                   u32 match ip protocol 1 0xff flowid 1:1 \
                       match ip src 10.0.0.2 flowid 1:1 \
                   action vlan push id 123

       Here  is  an  example  of  the  pop  function:  Incoming  VLAN  packets  on eth0 are decapsulated and the
       classification process then restarted for the plain packet:

              #tc qdisc add dev eth0 handle ffff: ingress
              #tc filter add dev $ETH parent ffff: pref 1 protocol 802.1Q \
                   u32 match u32 0 0 flowid 1:1 \
                   action vlan pop reclassify

       For an example of the pop_eth and push_eth modes, see tc-mpls(8).

SEE ALSO

       tc(8), tc-mpls(8)

iproute2                                           12 Jan 2015                 VLAN manipulation action in tc(8)