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.. _interfaces-qinq:
QinQ
----
QinQ (802.1ad_) — allows multiple VLAN tags to be inserted into a single frame.
QinQ can be used to tunnel vlans in a vlan.
**vif-s** and **vif-c** stand for the ethertype tags that get set:
The inner tag is the tag which is closest to the payload portion of the frame; it is officially called C-TAG (Customer tag, with ethertype 0x8100).
The outer tag is the one closer/closest to the Ethernet header; its name is S-TAG (Service tag, ethertype 0x88a8).
Configuration commands:
.. code-block:: sh
interfaces
ethernet <eth[0-999]>
address <ipv4>
address <ipv6>
description <txt>
disable
ip
<usual IP options>
ipv6
<usual IPv6 options>
vif-s <[0-4096]>
address <ipv4>
address <ipv6>
description <txt>
disable
ip
<usual IP options>
ipv6
<usual IPv6 options>
vif-c <[0-4096]>
address <ipv4>
address <ipv6>
description <txt>
disable
ip
<usual IP options>
ipv6
<usual IPv6 options>
Example:
.. code-block:: sh
set interfaces ethernet eth0 vif-s 333
set interfaces ethernet eth0 vif-s 333 address 192.0.2.10/32
set interfaces ethernet eth0 vif-s 333 vif-c 777
set interfaces ethernet eth0 vif-s 333 vif-c 777 address 10.10.10.10/24
.. _802.1ad: https://en.wikipedia.org/wiki/IEEE_802.1ad
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