@Binabik Hello, I asked my ISP to temporarily disable DHCP on the main router and everything works perfectly as before the firmware update. The Archer MR 600 router took the manually assigned fixed...

@marceltrido Hello marceltrido, Thank you for your reply. You have explained the problem very well and concisely. I know I can downgrade the firmware version and will do so as a last resort. I don't...

@Sunshine Hi Sunshine, I will try to explain the problem better than last time. First of all, here is a simplified map of the network: The main router is managed by my ISP and I cannot alter its...

After upgrading the firmware to version 1.7, the router (LAN interface) ignores the manually assigned IPv4 address and takes one from another DHCP server on the network. It also ignores the second...