@Gopal2022 I have used a similar setup on a few occasions and it works as expected: C64 (router mode) LAN port => WAN port A6 (AP mode) LAN port => WAN port C6 (AP mode) - daisy-chained should work...

@azgar Check your Archer C64 bottom sticker and confirm whether it's a Archer C64(EU) or Archer C64(US) region device. The FW regions are not interchangable. You have to use a FW release for the same...

@THECATTO Use MR600 user guide - Chapter 4.2 to locate the NAT option - it should be in Advanced > Network > Internet. You should disable the MR600 LAN DHCP server as well - Chapter 11.4.2. Finally,...

@azgar Yes, that's the procedure, just like upgrading the FW, but with an older version. You're doing it just right. Some FW releases can't be downgraded and this is stated in the release notes. For...

@azgar I am using Archer C64 without any issue so far, but with FW 1.11.30. I noticed that you're on the latest FW version - 1.12.0. Can you downgrade to the previous version 1.11.30 and check if...

@mrwogu Well, let's try something else then - create a configuration backup of your C80 (from its WebGUI and also take some notes aside, just in case you can't use this configuration file later). If...