What is L2TP Secret Tab?

What is L2TP Secret Tab?

Dont have a clue about what you are talking about. Maybe its a secret.

I do understand IPSEC secret aka on this link.
https://help.mikrotik.com/docs/display/ROS/L2TP

For using the Mikrotik as an LNS, annoyingly they never implemented the LAC functionality.

I’m asking about the L2TP Secret Tab. I have no idea for what it is.

May you explain these acronyms?

LAC = L2TP access concentrator, LNS = L2TP network server

I hope MikroTik adds LAC support at some point. Certainly do not delay v7 stable for it, but it would be a nice feature.