Hei, thanks for the replies.
here is my network config (as in /etc/config/network) for both routers:
GL.iNet 6416
config interface ‘lan’
option ifname ‘eth1’
option force_link ‘1’
option type ‘bridge’
option proto ‘static’
option ipaddr ‘192.168.8.1’
option netmask ‘255.255.255.0’
option ip6assign ‘60’
MR3020
config interface ‘lan’
option ifname ‘eth0’
option type ‘bridge’
option proto ‘static’
option ipaddr ‘192.168.4.1’
option netmask ‘255.255.255.0’
For GL.iNet6416 act as repeater to mr3020, GL.iNet6416 can get IP (192.168.4.231) from mr3020.
really confusing me, it only happen (not working) when I connect mr3020 (as wisp/repeater) to GL.iNet 6416 (as server router)