Hi all. I have created an L2TP VPN connection between two remote ER605's. It is currently connecting properly as unencrypted. However, when I try to encrypt the tunnel I get the following error from the client side:

For an IPsec policy with the same IP address at both ends, please change the WAN port or server IP as the parameters in Phase-1 are different.

I have been unsuccessful identifying the issue. I did have a successful IPSec tunnel configured but disabled it on both ends when I created the L2TP connection - so I'm confused as to what is happening here.

Any help appreciated so I can secure this connection.