The other thing that he changed, and I'm not so sure this isn't a work-around, is that he put the RED and it's DHCP scope on a different subnet. Whereas my main network is a 10.0.1.255/24 subnet, the red is now on 10.0.2.255/24 with it's own DHCP scope in that subnet. It all started working as soon as he did this, so it seemed necessary. My issue is that the solution seems counter-intuitive to the 'RED is just like a long Ethernet cable' idea that I keep hearing. If this truly was like a long Ethernet cable, wouldn't I be able to use the same subnet, with a non-overlapping and complimentary DHCP) scope for my remote devices?