I started facing issues with my Archer C6 router today.

- When i connect my laptop to direct wired connection (without router) internet on my laptop works fine

- When i connect Archer C6 to wired connection, only some of the devices seem to connect and work correctly

for E.g., my office laptop just connected fine while my android mobile does not connect. Similarly, my personal laptop could not connect but my fire tv stick works good. Once i updated TCP/IPv4 setting on my personal laptop to use fixed DNS, it seems to work correctly.

I have already tried resetting using the button on router, i also reinstalled firmware manually from the laptop that works with router and i restored to factory default settings from router login. The issue still continues to persist.

This router is purchased from Amazon India in Dec 2020 so its fairly new device. Can you help here at the earliest.