1VLAN manipulation action in tc(8)    Linux   VLAN manipulation action in tc(8)
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NAME

6       vlan - vlan manipulation module
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SYNOPSIS

9       tc  ... action vlan { pop | pop_eth | PUSH | MODIFY | PUSH_ETH } [ CON‐
10               TROL ]
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12       PUSH := push [ protocol VLANPROTO ]  [ priority VLANPRIO ] id VLANID
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14       MODIFY := modify [ protocol VLANPROTO ]    [  priority  VLANPRIO  ]  id
15               VLANID
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17       PUSH_ETH := push_eth dst_mac LLADDR src_mac LLADDR
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19       CONTROL  :=  {  reclassify | pipe | drop | continue | pass | goto chain
20               CHAIN_INDEX }
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DESCRIPTION

23       The vlan action allows one to perform 802.1Q en- or decapsulation on  a
24       packet, reflected by the operation modes POP, PUSH and MODIFY.  The POP
25       mode is simple, as no further information is required to just drop  the
26       outer-most  VLAN  encapsulation.  The  PUSH and MODIFY modes require at
27       least a VLANID and allow one to optionally choose the VLANPROTO to use.
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29       The vlan action can also be used to add or  remove  the  base  Ethernet
30       header.  The  pop_eth  mode, which takes no argument, is used to remove
31       the base Ethernet header. All existing VLANs must have been  previously
32       dropped. The opposite operation, adding a base Ethernet header, is done
33       with the push_eth mode. In that case,  the  packet  must  have  no  MAC
34       header  (stacking  MAC  headers  is not permitted). This mode is mostly
35       useful when a previous action has encapsulated the whole original frame
36       behind a network header and one needs to prepend an Ethernet header be‐
37       fore forwarding the resulting packet.
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OPTIONS

41       pop    Decapsulation mode, no further arguments allowed.
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43       push   Encapsulation mode. Requires at least id option.
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45       modify Replace mode. Existing 802.1Q tag is replaced. Requires at least
46              id option.
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48       pop_eth
49              Ethernet header decapsulation mode. Only works on a plain Ether‐
50              net header: VLANs, if any, must be removed first.
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52       push_eth
53              Ethernet header encapsulation mode. The Ethertype  is  automati‐
54              cally set using the network header type. Chaining Ethernet head‐
55              ers is not allowed: the packet must have no MAC header when  us‐
56              ing this mode. Requires the dst_mac and src_mac options.
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58       id VLANID
59              Specify  the VLAN ID to encapsulate into.  VLANID is an unsigned
60              16bit integer, the format is detected automatically (e.g. prefix
61              with '0x' for hexadecimal interpretation, etc.).
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63       protocol VLANPROTO
64              Choose  the  VLAN  protocol  to use. At the time of writing, the
65              kernel accepts only 802.1Q or 802.1ad.
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67       priority VLANPRIO
68              Choose the VLAN priority to use. Decimal number in range of 0-7.
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70       dst_mac LLADDR
71              Choose the destination MAC address to use.
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73       src_mac LLADDR
74              Choose the source MAC address to use.
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76       CONTROL
77              How to continue after executing this action.
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79              reclassify
80                     Restarts classification by jumping back to the first fil‐
81                     ter attached to this action's parent.
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83              pipe   Continue with the next action, this is the default.
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85              drop   Packet will be dropped without running further actions.
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87              continue
88                     Continue classification with next filter in line.
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90              pass   Return  to calling qdisc for packet processing. This ends
91                     the classification process.
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EXAMPLES

94       The following example encapsulates incoming ICMP packets on  eth0  from
95       10.0.0.2 into VLAN ID 123:
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97              #tc qdisc add dev eth0 handle ffff: ingress
98              #tc filter add dev eth0 parent ffff: pref 11 protocol ip \
99                   u32 match ip protocol 1 0xff flowid 1:1 \
100                       match ip src 10.0.0.2 flowid 1:1 \
101                   action vlan push id 123
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103       Here  is  an example of the pop function: Incoming VLAN packets on eth0
104       are decapsulated and the classification process then restarted for  the
105       plain packet:
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107              #tc qdisc add dev eth0 handle ffff: ingress
108              #tc filter add dev $ETH parent ffff: pref 1 protocol 802.1Q \
109                   u32 match u32 0 0 flowid 1:1 \
110                   action vlan pop reclassify
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112       For an example of the pop_eth and push_eth modes, see tc-mpls(8).
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SEE ALSO

116       tc(8), tc-mpls(8)
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120iproute2                          12 Jan 2015VLAN manipulation action in tc(8)
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