I must ask question again. I have RUT950 with two SIM cards. When I use automatic switching router switches beetwen cards every 3 minutes. What I do wrong? I use ICMP echo to 184.108.40.206 to check data connection. Allthough the ping from RUT950 is ok data connection is broken.
You selected that pings go through LAN interface which is "br-lan"But on putty console you pinging from default interface which I think is your wired wan eth1.Try "ping -I br-lan 220.127.116.11" and probably its not pinging.helped?