Hi.I have a home network according to the picture. I have problem with hairpin. When I need connnect from router 1 network to router 2 network (but when I disconnect on one side main wan connection and connecting via Backup WAN, all works fine). Please help me where is the problem. 213.160.xxx.xxx is public static ip address forwarded bilaterally.
Why dont you answer the questions asked here first!!
http://forum.mikrotik.com/t/mikrotik-rb4011igs-rm-pppoe-dynamic-static-ip/170828/7
It all depends on how exactly you have implemented the forwarding of incoming traffic from the internet towards the public addresses to UBNT 1 and UBNT 2 from the 4011, but normally, it should work just fine. So post the output of /export hide-sensitive command on the 4011 after redacting all occurrences of the public addresses the same way you did on the picture, so that the information remains consistent. I recommend to use search and replace in a text editor for that to avoid missing some occurrence.