IMC Networks IE-MiniFiberLinX-II Operation Manual page 27

Mode Four - Transparency with Extra Tagging (or Q-in-Q)
This mode is designed to either pass all customer traffic with the defined extra tag (Q-
in-Q) or add and remove the defined extra tag (Q-in-Q) on all customer traffic.
Management traffic can be tagged or untagged.
Select Y on the initial config screen and then, select Y when asked to select Extra
Tags. When setting this operation mode, the question "Are Extra Tags left on the
Data Port" should be answered NO for the remote IE-MiniFiberLinX-II and YES for
the host connection.
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