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