@toac I've read somewhere about VRRP, that is a L3 switch function. It's kinda like "So two Gateway devices will work together as a logical gateway. And all PCs can set this logical gateway as their...

@Drwifi IP changing could be the problem. But it may also related to the ports. You may need to make sure: 1. The ER605 has correct Controller IP and can Ping to the controller IP through PPPoE WAN...

@Sathiya Have you tried to connect this USB modem to your laptop directly and test if it is stable? Is there any Link Backup settings you've done? Try remove all link backup settings. (WAN port will...

@MoGigi I think no other settings are required. If you do ACL then the printer may won't be available across the VLANs.

@Abso Which band wifi did you test, 2.4Ghz or 5Ghz? You will also need to check the link speed between your wireless devices and the EAP. Source

@MoGigi On the ER605, the port connects to your EAP should have VLAN10/20/30 all tagged; PVID is not important when this port is tagged. (but if this port is used to connect a common PC, not EAP,...