Reference10:Interfaces/ETH/VLAN

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If a network uses several VLANs (Virtual Local Area Network), a VLAN can be specified for every Ethernet interface. This ensures that the data packets are transmitted to the specified VLAN only. Usually the VLAN configuration for innovaphone devices will be provided either by a DHCP Server [1] or a managed network switch via LLDP/MED. In this case the values configured here are ignored.

ID The ID of the VLAN. The value 0 is applied if the ID entry field is empty. The VLAN ID with the value 0 switches the QoS (Quality of Service) off according to 802.1q.
Priority If the switch at the port to the innovaphone gateway happens to be configured to a different ID, the same value must be entered here to allow the Ethernet packets to be prioritised. A priority value between 0 and 7 is entered here (configuration on the Ethernet switch).