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@ -43,3 +43,23 @@ VLAN
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VLANs (Virtual LANs) can be used to segment a single physical network into multiple virtual networks. This can be
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done for QoS purposes, among other things. For this reason, most ISP-issued IPTV devices utilise VLANs.
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------
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VXLAN
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------
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Virtual eXtensible Local Area Networks (VXLANs) are used to overlay virtualized layer 2 networks over layer 3 networks
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as described by `rfc7348 <https://tools.ietf.org/html/rfc7348>`__.
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Tunnels can be setup in point to point (parameter :code:`Remote address`) or multicast (parameters :code:`Multicast group` and :code:`Device`).
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The `Source address` must be an existing (statically assigned) address assigned at this firewall, which will be used as
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source in the encapsulating IPv4/IPv6 header.
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.. Note::
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Since the vxlan interface encapsulates the Ethernet frame with an IP, UDP, and vxlan header,
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the resulting frame may be larger than the MTU of the physical network. The vxlan specification recommends the physical
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network MTU be configured to use jumbo frames to accommodate the encapsulated frame size.
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Alternatively, the MTU size on the vxlan interface might be reduced to allow the encapsulated frame to fit in
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the current MTU of the physical network.
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