VLAN manipulation action in tc(8)                                      Linux                                     VLAN manipulation action in tc(8)

NAME

       vlan - vlan manipulation module

SYNOPSIS

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

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

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

       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.

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.

       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.

       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 
                   u32 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

SEE ALSO

       tc(8)

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