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This article is to share with you about the differences between tagged ports and untagged ports. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Differences: 1. The data received by the port is different, the data received by the untagged port needs to be marked with VLAN, while the data received by the tagged port is not added if it does not contain VLAN. 2. The data sent by the port is different. VLAN ID needs to be removed from the packet in untagged, but tagged is not.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

The difference between tagged Port and untagged Port in switch Vlan

1. The port receives different data.

If the port is in tagged mode, the input packet will be added with the default vlan; if the packet itself does not contain VLAN. If the packet itself already contains VLAN, it will not be added.

If it is in untagged mode, the default vlan will be added to all incoming packets. Regardless of whether the incoming packet is already marked with VLAN.

2. The port sends different data.

If the port is in tagged mode, if the default VLAN of the port is equal to the VLAN contained in the packet sent, then the VLAN tag will be removed from the packet sent; if it is not equal, the packet will be sent with VLAN to achieve the transparent transmission of VLAN.

In untagged mode, VLAN ID is removed from the packet regardless of whether the default VLAN of the port is equal to the VLAN of the packet to be output.

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