mirror of
https://github.com/vyos/vyos-documentation.git
synced 2025-11-03 04:12:03 +01:00
75 lines
2.6 KiB
ReStructuredText
75 lines
2.6 KiB
ReStructuredText
.. _qinq-interface:
|
|
|
|
QinQ (802.1ad)
|
|
--------------
|
|
|
|
IEEE 802.1ad was an Ethernet networking standard informally known as QinQ as
|
|
an amendment to IEEE standard :ref:`vlan-interface`. 802.1ad was incorporated
|
|
into the base 802.1q standard in 2011. The technique is also known as provider
|
|
bridging, Stacked VLANs, or simply QinQ or Q-in-Q. "Q-in-Q" can for supported
|
|
devices apply to C-tag stacking on C-tag (Ethernet Type = 0x8100).
|
|
|
|
The original 802.1q specification allows a single Virtual Local Area Network
|
|
(VLAN) header to be inserted into an Ethernet frame. QinQ allows multiple
|
|
VLAN tags to be inserted into a single frame, an essential capability for
|
|
implementing Metro Ethernet network topologies. Just as QinQ extends 802.1Q,
|
|
QinQ itself is extended by other Metro Ethernet protocols.
|
|
|
|
In a multiple VLAN header context, out of convenience the term "VLAN tag" or
|
|
just "tag" for short is often used in place of "802.1Q VLAN header". QinQ
|
|
allows multiple VLAN tags in an Ethernet frame; together these tags constitute
|
|
a tag stack. When used in the context of an Ethernet frame, a QinQ frame is a
|
|
frame that has 2 VLAN 802.1Q headers (double-tagged).
|
|
|
|
In VyOS the terms **vif-s** and **vif-c** stand for the ethertype tags that
|
|
are used:
|
|
|
|
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 with ethertype 0x88a8).
|
|
|
|
Configuration commands:
|
|
|
|
.. code-block:: none
|
|
|
|
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:: none
|
|
|
|
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 |