@hspindel A port should be untagged in only one VLAN, that is the VLAN you want that port belong to. Also, its PVID should be set to the VID of that untagged VLAN. In your case, the port on the...

@CFB25 I would be concerned seeing a MAC address on my network that I cannot identify, especially when it is wired. Are those APs installed in secure locations? Is it possible that somebody can...

@Mirek_RK Czy możesz utworzyć VLAN na swoim routerze? Jeżeli nie, to nie masz jeszcze odpowiedniego sprzętu żeby je używać. Musisz mieć jeszcze albo „VLAN-aware” router albo „routing” przełącznik.

@amscrey Check how the WAN side of your Linksys router is configured. Maybe your ISP has some unusual requirements. Have you contacted your ISP about this issue?

@amscrey I have never heard about an ISP that would provide customers with modem/router combos and disable the routing capabilities. It's rather the opposite. Some of them make it impossible to...

@amscrey TC8715D is a modem/router combo. I believe its default LAN IP address is 192.168.0.1. Before you connect ER605 to TC8715D, try to change its LAN IP address to an address from a different...