@scotsman May have gotten it resolved by simply putting the m4 base unit into access point mode and leaving the R600 port configured as LAN. That appears to be working now as it should after a...

I am trying to link my Deco M4 Ac1200 base unit to a TP Link TL-R600VPN router...so far no luck - I have port two configured as 'wan' but the deco does not recognize the internet...cable modem...