VPN Server L2TP/ipsec on Mikrotik Switch mode version 7 problem.

Hello,

I am newbie in Mikrotik configuration.
I working as system administrator many years and i have learned some things by experience in networking.

My issue is that i have very simple configuration of L2TP/ipsec server on many Mikrotik’s under “switch mode” behind NAT routers which are working like a charm in version 6.4x.x
The problem is by upgrading to version 7.xx.x the VPN cannot communicate or ping any internal address.

i can upload my config if anyone more experienced person want to test it.