@frootieeloops Can you confirm how did you test the SIP ALG is still enabled on the router after you've disabled it ? Describe your network topology.

@frootieeloops You can try disabling UPnP feature as well:

@sstoichkov According to the Easymesh compatible routers list Archer A6 v4 and above supports Easymesh. Using them the other way round - AX53 as a satellite device would work using the first method.

@Topiltzin80 The local admin password should be the same in AP mode. You can try setting a simpler password and check if this is the culprit.

@SteveF161 To rule out signal strength issue, you could connect the RE315 in the same room where your main router is. Test if the RE315 is working as expected and then you can relocate it at position...

@MikeSay You can name the SSIDs the same or different - it's your choice. It's up to your devices (mobiles, laptop, etc.) to decide when they will roam between the router and the RE.