USG60 L2TP VPN with 2 wan

Hello,

I have 2 problems with the l2tp configuration on firewall USG60W

First problem:

If I configure l2tp VPN with VPN wizard in "easy mode" everything works correctl, but if i try to do the configuration manually in "expert mode" I can't get it to work.

Second problem: more serious

How do I set up two  VPN l2tp to be able to connect using 2 wan interface?

I currently have two connections with 2 different ISP

WAN1 public ip a.a.a.a

WAN2 public ip b.b.b.b

LAN: 172.30.160.x

IP-range used for VPN 192.168.100.5-192.168.100.205

With VPN wizard I can create the l2tp connection on WAN1 or on WAN2.

But I have to create two connections on both wan interface so the user can access vpn using public ip on wan1 (a.a.a.a) or public ip on wan2 (b.b.b.b)

Thanks


UPDATE.
I solved the first problem!

UPDATE 2
Solved also second problem  see https://businessforum.zyxel.com/discussion/1146/usg-l2tp-backup-connection