If you have an revision from outside Singapore/Malaysia or any B1/C1 revision, you will not find a "Wireless Repeater Extender" option in the official D-Link interface. Your next step is to explore installing DD-WRT open-source firmware, which is an excellent free solution to unlock this feature.
: It supports both 2.4GHz and 5GHz frequencies. dir868l repeater mode free
Visit the DD-WRT router database and search for "DIR-868L rev A1". Download both the "factory-to-ddwrt" file and the subsequent webflash upgrade file. If you have an revision from outside Singapore/Malaysia
– The default network name (SSID) was on a sticker on the router. No internet yet, that’s fine. dir868l repeater mode free