@LuaLilfaris What is the region version of your Archer C7 V5, is it CA or US? You may verify this by checking on the device label. If it fails to download the latest firmware from the cloud server...

@COCOTHAILAND Thank you for asking. As stated in my above post, please don't take this Planned as a guarantee, as the plan can be adjusted or changed. Planned is also not recommended for your...

@dantanian Thanks very much for sharing all the detailed info. To address the issue and try to fix it, we would like to have a specialist look into this further via email. Please check your mailbox...

@MarufAhammed Thank you for reaching out to us and welcome to the TP-Link community. Is there an issue with the router? I honestly don't have information for that router log, but I can consult with...

@dantanian Who is your ISP, please? Is the IPv4 connected fine? Are all the parameters for IPv6 confirmed to be correct, such as Get IPv6 Address: SLAAC? Please try choosing Auto.

@Whiskers68 What is the model number of the DSL modem? You can find it on the modem bottom sticker, which should start with Archer xxxxx. Which light is off after connecting the extender to the modem...