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VLAN manipulation action in tc(8)    Linux   VLAN manipulation action in tc(8)
NAME
       vlan - vlan manipulation module
SYNOPSIS
       tc  ... action vlan { pop | pop_eth | PUSH | MODIFY | PUSH_ETH } [ CON-
               TROL ]
       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 one 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 one 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 Ether-
              net header: VLANs, if any, must be removed first.
       push_eth
              Ethernet header encapsulation mode. The Ethertype  is  automati-
              cally set using the network header type. Chaining Ethernet head-
              ers 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 fil-
                     ter 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 2015VLAN manipulation action in tc(8)