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70 lines
2.6 KiB
ReStructuredText
70 lines
2.6 KiB
ReStructuredText
.. _vlan-interface:
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VLAN (802.1q)
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-------------
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IEEE 802.1q, often referred to as Dot1q, is the networking standard that
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supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. The
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standard defines a system of VLAN tagging for Ethernet frames and the
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accompanying procedures to be used by bridges and switches in handling
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such frames. The standard also contains provisions for a quality-of-service
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prioritization scheme commonly known as IEEE 802.1p and defines the Generic
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Attribute Registration Protocol.
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Portions of the network which are VLAN-aware (i.e., IEEE 802.1q conformant)
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can include VLAN tags. When a frame enters the VLAN-aware portion of the
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network, a tag is added to represent the VLAN membership. Each frame must
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be distinguishable as being within exactly one VLAN. A frame in the
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VLAN-aware portion of the network that does not contain a VLAN tag is
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assumed to be flowing on the native VLAN.
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The standard was developed by IEEE 802.1, a working group of the IEEE 802
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standards committee, and continues to be actively revised. One of the
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notable revisions is 802.1Q-2014 which incorporated IEEE 802.1aq (Shortest
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Path Bridging) and much of the IEEE 802.1d standard.
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802.1a VLAN interfaces are represented as virtual sub-interfaces in VyOS. The
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term used for this is ``vif``. Configuration of a tagged sub-interface is
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accomplished using the configuration command:
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``set interfaces ethernet <name> vif <vlan-id>``
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To assign a vif 100 using the VLAN 100 tag to physical interface eth1 use:
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.. code-block:: none
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set interfaces ethernet eth1 vif 100 description 'VLAN 100'
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set interfaces ethernet eth1 vif 100 address '192.168.100.1/24'
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set interfaces ethernet eth1 vif 100 address '2001:db8:100::1/64'
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Resulting in:
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.. code-block:: none
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ethernet eth1 {
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address 192.168.100.1/24
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address 2001:db8:100::1/64
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description INSIDE
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duplex auto
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hw-id 00:53:29:44:3b:19
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smp_affinity auto
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speed auto
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vif 100 {
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address 192.168.100.1/24
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description "VLAN 100"
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}
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}
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VLAN interfaces are shown as `<name>.<vlan-id>`, e.g. `eth1.100`:
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.. code-block:: none
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vyos@vyos:~$ show interfaces
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Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
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Interface IP Address S/L Description
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--------- ---------- --- -----------
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eth0 172.16.51.129/24 u/u OUTSIDE
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eth1 192.168.0.1/24 u/u INSIDE
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eth1.100 192.168.100.1/24 u/u VLAN 100
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lo 127.0.0.1/8 u/u
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::1/128
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