Hi @DJ_M    

Thanks for reaching out to us. 

According to your description, it seems that your Archer C6U has unstable connection issue. 

For this issue, we would like to collect some information first so that we can locate the issue quickly and provide you some suggestions.

Does this issue occur to wireless connection only, or both wireless and wired connections?

If this issue occurs with a wireless connection, please refer to: Troubleshooting: Unstable wireless connection on TP-Link router
If both the wired connection and wireless connection are unstable, please refer to:  Troubleshooting: Unstable connection on the TP-Link router

If the suggestions on the 2 guide cannot resolve the issue, please get back to us and let us know the exact situation of yours, as well as the result of troubleshooting you've done.