Hi. 

Ia am trying to establish a tunnel between a TL-ER-6020 and TL-R605 and keep getting the following error: 

WAN: Phase 2 of IKE negotiation failed. (Peers=86.125.115.219<->86.125.114.28, Error=18)

Previously I had a TL-R600VPN instead of the 605 and it all worked fine. If I plug it back in it still works fine. 

Double checked the settings on both ends and can't figure it out. 

Any help as to what error 18 would be very much apprechiated.