@evan022 Regarding the interface you mentioned, you can set the Idle timeout in the web interface under System Tools.

@firefox111 Are you pinging ER605 WAN IP address? Is the WAN IP a public IP?

@stian As far as I know, this gateway does not act as a DNS Server, it only serves as a forwarder.

@Nickthepic It is not recommended to swipe the firmware versions of EAPs from different regions, such as CA to US or US to CA, as this may result in corrupted firmware and bricking.

@Volcanoashtray Yes, you can use the CPE to recieve the wifi signal from third-part AP, but note wireless communication is bidirectional. So you need to make sure the AP can send the signal in such a...

@evacc44 The ports between both switches need to be set to Tagged, it looks like there is still a problem with your VLAN settings. How to configure 802.1Q VLAN