Planet IGSW-2840 User Manual page 190

4.8.2.2 802.1Q Tunnel Port Configuration
Adding an Interface to a QinQ Tunnel
Follow the guidelines in the preceding section to set up a QinQ tunnel on the Industrial Managed Switch. Use the VLAN Port
Configuration or VLAN Trunk Configuration screen to set the access port on the edge switch to 802.1Q Tunnel mode. Also set
the Tag Protocol Identifier (TPID) value of the tunnel port if the attached client is using a nonstandard 2-byte ethertype to
identify 802.1Q tagged frames.
Command Usage:

Use the 802.1Q Tunnel Configuration screen to set the Industrial Managed Switch to QinQ mode before
configuring a tunnel port (see

Use the TPID field to set a custom 802.1Q ethertype value on the selected interface. This feature allows the switch
to interoperate with third-party switches that do not use the standard 0x8100 ethertype to identify 802.1Q-tagged
frames. For example, if 0x1234 is set as the custom 802.1Q ethertype on a trunk port, incoming frames containing
that ethertype are assigned to the VLAN contained in the tag following the ethertype field, as they would be with a
standard 802.1Q trunk. Frames arriving on the port containing any other ethertype are looked upon as untagged
frames, and assigned to the native VLAN of that port.

All ports on the switch will be set to the same ethertype.
"Enabling QinQ Tunneling on the
Figure 4-8-9.802.1Q Tunnel Port Configuration screenshot
Switch").
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User's Manual of IGSW-2840