Just got this 868L router recently, and decided to set it up as a Wireless Repeater Extender to my main router which is a 865L.
A Layman's Trial on D-Link DIR-868L
Have read through the above articles, and the steps that I took:
When I check "Status tab - Wireless" in my main router 865L, based on the 868L MAC address, I notice no IP address is assigned
868L firmware - 1.00SHC. (Have also tried firmware 1.03SHC, but same result as above)
865L firmware - 1.06SHC
I manage to find out the problem the hard way, after many trial and error. It seems that my DIR-868L (in Wireless Repeater Extender mode) not able to connect to main router when there is a "$" special character in the wireless passphrase. Under router mode, looks ok, 868L definitely support this special character. Perhaps only in extender mode.
So answers to my questions earlier:
For information, hope folks who may face similar issue find this helpful.