The tmnxEthTunnelRowStatus controls the creation and deletion of row
entries in the tmnxEthTunnelConfigTable.
A corresponding row in the tmnxPortTable is created by the system when
a tmnxEthTunnelRowStatus value of 'createAndGo (4)' is issued on a
new row in the tmnxEthTunnelConfigTable. The corresponding row in the
tmnxPortTable will be destroyed by the system when the
tmnxEthTunnelRowStatus value of 'destroy (6)' is issued.