Planet Technology WSD-800 “OK”, tagged, Trunk:, single, “Trunk”, Access:, untagged, “Access”, multiple, multiple, Port Mode, VLAN Type, Frame Leave, 802.1Q VLAN, Always Untag

User’s Manual of WSD-800 / WGSD-910/WGSD-1022C

only used internally within the Switch). Untagging is used to send packets from an 802.1Q-compliant network device to a non-compliant network device.

Frame Income	Income Frame is tagged	Income Frame is untagged
Frame Leave
Leave port is tagged	Frame remains tagged	Tag is inserted
Leave port is untagged	Tag is removed	Frame remain untagged

Here pay attention to the explainion of “Access”, ”Always Untag”and “Trunk”.

。Access: Ports will strip the 802.1Q tag from all packets that out of those ports. If the packet doesn’t have an 802.1Q VLAN tag, the port will not alter the packet. Thus, all packets received by and forwarded by an untagging port will have no 802.1Q VLAN information. Untagging is used to send packets from an 802.1Q-compliant network device to a non-compliant network device.

Ports with “Access” mode belong to a single untagged VLAN.

。Trunk: Ports with tagging enabled will put the VID number, priority and other VLAN information into the header of all packets that out of those ports. If a packet has previously been tagged, the port will not alter the packet, thus keeping the VLAN information intact. The VLAN information in the tag can then be used by other 802.1Q compliant devices on the network to make packet forwarding decisions.

。Always Untag: The port belongs to VLANs, and each VLAN is user-defined as tagged or untagged (full 802.1Q mode). Ports will strip the 802.1Q tag from all packets that out of those ports.

。

Port Mode	VLAN Membership	Frame Leave
Access	Belongs to a single untagged VLAN	Untagged
		( Tag=PVID be removed)
Always Untag	Allowed to belongs to multiple untagged	Untagged
	VLANs at the same time	(Tag=PVID be removed)
Trunk	Allowed to belongs to multiple Tagged	Tagged
	VLANs at the same time	(Tag=PVID or Original VID be remained)

Port VID (PVID)

Set the port VLAN ID that will be assigned to untagged traffic on a given port. This feature is useful for accommodating devices that you want to participate in the VLAN but that don’t support tagging. The Switch allows each port to set one PVID, the range is 1~255, default PVID is 1. The PVID must be the same as the VLAN ID that the port was defined as belonging to in the VLAN group, or the untagged traffic will be dropped.

1.Select 802.1Q VLAN in the VLAN Type field and click on the “OK” button.

-52-