TP-Link TL-SL5428E manual Vlan Config, ¾ Pvid

（2） TRUNK: The TRUNK port can be added in multiple VLANs, and the egress rule of the port is TAG. The TRUNK port is generally used to connect the cascaded network devices for it can receive and forward the packets of multiple VLANs. When the packets are forwarded by the TRUNK port, its VLAN tag will not be changed.

（3） GENERAL: The GENERAL port can be added in multiple VLANs and set various egress rules according to the different VLANs. The default egress rule is UNTAG. The PVID can be set as the VID number of any VLAN the port belongs to.

¾PVID

PVID (Port Vlan ID) is the default VID of the port. When the switch receives an un-VLAN-tagged packet, it will add a VLAN tag to the packet according to the PVID of its received port and forward the packets.

When creating VLANs, the PVID of each port, indicating the default VLAN to which the port belongs, is an important parameter with the following two purposes:

（1） When the switch receives an un-VLAN-tagged packet, it will add a VLAN tag to the packet according to the PVID of its received port

（2） PVID determines the default broadcast domain of the port, i.e. when the port receives UL packets or broadcast packets, the port will broadcast the packets in its default VLAN.

Different packets, tagged or untagged, will be processed in different ways, after being received by ports of different link types, which is illustrated in the following table.

	Port Type		Receiving Packets			Forwarding Packets
		Untagged Packets			Tagged Packets
					If the VID of packet is the
					same as the PVID of the
					port, the packet will be
	Access				received.	The packet will be forwarded after
					If the VID of packet is not	removing its VLAN tag.
		When	untagged		the same as the PVID of
		packets are received,			the port, the packet will
		the port will add the			be dropped.
	Trunk	default VLAN tag, i.e.				The packet will be forwarded with
		the PVID	of	the		its current VLAN tag.
					If the VID of packet is
		ingress port, to		the
						If the egress rule of port is TAG,
		packets.			allowed by the port, the
					packet will be received.	the packet will be forwarded with
	General				If the VID of packet is	its current VLAN tag.
					forbidden by the port, the	If the egress rule of port is
					packet will be dropped.	UNTAG, the packet will be
						forwarded after removing its
						VLAN tag.
		Table 6-1 Relationship between Port Types and VLAN Packets Processing
IEEE 802.1Q VLAN function is implemented on the VLAN Config and Port Config pages.

6.1.1 VLAN Config

On this page, you can view the current created 802.1Q VLAN.

Choose the menu VLAN→802.1Q VLAN→VLAN Config to load the following page.

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