Lantech IES-2008B-DNV, User Manual

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The trunk port has to be connected to a trunk/hybrid port of the other switch.
Both the tagged VID of the two ports have to be the same.
3. Hybrid Link: A segment which consists of Access and Trunk links. The
hybrid port has both the features of access and trunk ports. A hybrid port has a
PVID belonging to a particular VLAN, and it also forwards the specified tagged-
frames for the purpose of VLAN communication across switches.
4. QinQ (Double Tag VLAN) configuration: Double Tag VLAN is another
mechanism employed in a Metro LAN in which it can save IP v4 address by
residing groups of sub-VLANs (customer port) in a VLAN(Host) and utilizing the
default gateway IP address of Double Tag VLAN sharing the same IP subnet
mask. Double Tag VLAN in L2 provides enhances security between customer
(each home), by dis-communication between the sub-VLANs, even they are
located in the same LAN and have the same IP subnet mask. Better yet, the
configuration is simple than assigning each VLAN as per port based VLAN to
customer (each home).
Note:
1.
It’s not necessary to type ‘1’ in the tagged VID. The hybrid port will forward
the frames of VLAN 1.
2. The trunk port has to be connected to a trunk/hybrid port of the other
switch. Both the tagged VID of the two ports have to be the same.

Untagged VID: This column field is available when Link Type is set as
Access Link and Hybrid Link. Assign a number in the range between 1 an
4094.

Tagged VID:
This column field is available when Link Type is set as Trunk
Link and Hybrid Link. Assign a number in the range between 1 an 4094.

Click
Apply
to have the configuration take effect.

You can see the link type, untagged VID, and tagged VID information of each
port in the table below on the screen.