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Basic QinQ
Basic QinQ is also called QinQ tunneling and is implemented based on interfaces. Basic QinQ allows the device to add the default VLAN tag of an interface to a packet received on the interface.
- If the received packet carries one VLAN tag, the packet then has double tags.
- If the received packet does not carry any VLAN tag, the packet then carries the default VLAN tag of an interface.