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diff --git a/docs/interfaces/bridge.rst b/docs/interfaces/bridge.rst index ba6d70fb..058d7b01 100644 --- a/docs/interfaces/bridge.rst +++ b/docs/interfaces/bridge.rst @@ -113,6 +113,57 @@ links providing fault tolerance if an active link fails. Designated Bridges. Hello packets are used to communicate information about the topology throughout the entire Bridged Local Area Network. +Enable VLAN-aware bridge +------------------------- + +.. cfgcmd:: set interfaces bridge <interface> member interface <member> native-vlan <vlan-id> + + Set the native VLAN ID flag of the interface. When a data packet without a VLAN tag enters + the port, the data packet will be forced to add a tag of a specific vlan id. When the vlan + id flag flows out, the tag of the vlan id will be stripped + +.. cfgcmd:: set interfaces bridge <interface> member interface <member> allowed-vlan <vlan-id> + + Allows specific VLAN IDs to pass through the bridge member interface + +.. cfgcmd:: set interfaces bridge <interface> member interface <member> allowed-vlan <n-m> + + `n` and `m` represent a VLAN ID, which identifies a VLAN ID range and allows all VLAN IDS in this range to pass through the bridge member interface + +VLAN (802.1q) configuration +--------------------------- + +IEEE 802.1q, often referred to as Dot1q, is the networking standard that supports +virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a +system of VLAN tagging for Ethernet frames and the accompanying procedures to be +used by bridges and switches in handling such frames. The standard also contains +provisions for a quality-of-service prioritization scheme commonly known as IEEE +802.1p and defines the Generic Attribute Registration Protocol. + +Portions of the network which are VLAN-aware (i.e., IEEE 802.1q conformant) can +include VLAN tags. When a frame enters the VLAN-aware portion of the network, a +tag is added to represent the VLAN membership. Each frame must be distinguishable +as being within exactly one VLAN. A frame in the VLAN-aware portion of the network +that does not contain a VLAN tag is assumed to be flowing on the native VLAN. + +The standard was developed by IEEE 802.1, a working group of the IEEE 802 +standards committee, and continues to be actively revised. One of the notable +revisions is 802.1Q-2014 which incorporated IEEE 802.1aq (Shortest Path Bridging) +and much of the IEEE 802.1d standard. + +802.1q VLAN interfaces are represented as virtual sub-interfaces in VyOS. The +term used for this is ``vif``. + +.. cfgcmd:: set interfaces bridge <interface> vif <vlan-id> + + Create a new VLAN interface on interface `<interface>` using the VLAN number + provided via `<vlan-id>`. + + You can create multiple VLAN interfaces on a physical interface. The VLAN ID + range is from 1 to 4094. + + .. note:: Only 802.1Q-tagged packets are accepted on Bridge vifs. + ******* Example ******* @@ -152,6 +203,45 @@ This results in the active configuration: Example ******* +An example of creating a VLAN-aware bridge is as follows: + +* A bridge named `br100` +* The member interface `eth1` is a trunk that allows VLAN 10 to pass +* VLAN 10 on member interface `eth2` (ACCESS mode) +* Enable STP +* Bridge answers on IP address 192.0.2.1/24 and 2001:db8::ffff/64 + +.. code-block:: none + + set interfaces bridge br100 member interface eth1 allowed-vlan 10 + set interfaces bridge br100 member interface eth2 native-vlan 10 + set interfaces bridge br100 vif 10 address 192.0.2.1/24 + set interfaces bridge br100 vif 10 address 2001:db8::ffff/64 + set interfaces bridge br100 stp + +This results in the active configuration: + +.. code-block:: none + + vyos@vyos# show interfaces bridge br100 + member { + interface eth1 { + allowed-vlan 10 + } + interface eth2 { + native-vlan 10 + } + } + stp + vif 10 { + address 192.0.2.1/24 + address 2001:db8::ffff/64 + } + +******* +Example +******* + .. opcmd:: show bridge The `show bridge` operational command can be used to display |