As previously suggested, we do get the error because the tunnel-group
default is L3 and our tunnels are configured L2.
We cannot add tehm to the Tunnel groups as they are different mode.
The editing of the tunnel does not have a mode change option on GUI
interface (possibly OS restriction, we are using 6.4.2.6).
we change it on the CLI, but were trying to do it only through one GUI
interface
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