Setting up a L2TP/IPsec VPN into my network and I had two questions that hopefully someone can answer.

1.  Though the instructions located here How to establish L2TP Server by SMB VPN Router using the new GUI? | TP-Link India specifically say that you can have the VPN IP Pool in the same subnet as your LAN, this does not seem to be the case.  If you try to do this you get an error that the "VPN IP pool conflicts with the IP addresses of the LAN".  I don't know if this is an issue as "Multi-Nets NAT" seems to be now built into this router (no config page)?

2.  For the life of me I can not figure out what the "Local IP Address" field is for in the VPN/Users setup??  From what I can tell you can set this to anything and the VPN client does not get assigned this number (instead gets an IP from the pool setup in question 1 above).  In fact I accidently set this number to an IP in use in my LAN and there were no issues at all?  I also tried setting up multiple Users with the same IP in this field and that seemed to be ok as well??  So what exactly is the point of this field?

Thanks!