Minor annoyance, but definitely there...I noticed it, but haven't commented until now. Is there any reason the RT-AC66 (and I'm guessing the N66) only have an option for one DNS server in DNS? Almost every router I know of has a fallback DNS address. This is kind of a big deal for me, since if my home server (which is my primary DNS) is down, I'd really like to have a second outside DNS for internet access provided through DHCP. It seems like a bit of an oversight considering that I've never seen another router that didn't offer a primary and a secondary option.