@iversxn This issue usually can be mitigated by using a factory made ethernet cable of a good quality. Try using a Cat5E cable - C6 v4 is only 1000mbps capable.

@VPinPanama I can't see any problem with your network setup from what you've described. The hotel APs are physically connected to your ER605, while C1200 provides a different subnet for your private...

@Eligijus92 Make sure that RE315 is with the latest FW release.Reset RE315 to its factory settings by pressing the reset button for about 10 seconds. Add the RE315 in the Easymesh network using WPS...

@VPinPanama What's yoiur C1200 current firmware version and region ? (details on the bottom sticker). Check if any of these features are configured Advanced > Wireless > MAC Filtering or Advanced >...

@nicola_cafaro This device probably is available on some free markets as well, but the community is not supporting this model for the reason posted earlier.

@VPinPanama If you have a wireless radio issue, most probably your guest Wi-Fi wouldn't work as well. Have you tried to change your C1200 main wirelss settings (details) and test again.