I use the same as your example:
IP/subnet from Uplink Router?
wifi interface of the router has ip 10.0.0.138/24
IP/subnet from WR1043ND WiFi Interface?
wifi - 10.0.0.50/24
IP/subnet from WR1043ND LAN Interface?
LAN - 10.0.1.1/24
IP/subnet from WR1043ND Bridge Interface?
IP/subnet from laptop with only ethernet connected to uplink router?
IP/subnet from laptop with only ethernet connected to WR1043ND router?
Laptop is connected by ethernet to WR1043ND - 10.0.0.80/24 (assigned by DHCP from uplink router)
IP/subnet from laptop with only wifi connected?
are you sending the ping from laptop? or from WR1043ND? or with laptop through WR1043ND to the uplink router?
I tried to send ping from laptop connected by ethernet (behind wr1043nd) - got 2000ms
When I tried ping from wr1043ND to uplink router:
1) when I had laptopt attached on wr1043nd by ethernet - response 2000ms / big packet lost
2) when I disconnected laptop from wr1043nd - everything works fine
have you done "install relayd" and "/etc/init.d/relayd enable" properly?
Yes, thru luci interface - i think there isnt improper way... "/etc/init.d/relayd enable" is enabled, I can list active process of relayd by "ps a"
Can you connect to your WR1043ND from the Wifi-side with your laptop?
Yes, without any problem while there isnt any ethernet client connected to wr1043...
Has the WR1043ND connected properly to the wifi?
When I simply connect it to wifi, no eth clients everything works fine.
Installed luci or have you done it with CLI only?
everything by Luci
Have you disabled the DHCP things on the WR1043ND interfaces?