I have an ASUS RT-N66U router behind the AT&T U-Verse supplied 2wire modem/router on a 24Mbps connection. The ASUS is behind the U-Verse 2wire modem, as I want to use OpenDNS and wireless N and not just the built in 802.11b/g capabilities of the 2wire.
Recently, all connections through the ASUS router have become extremely slow; kess than 2Mbps. If I connect any device to the 2wire, the speed is exactly what it should be.
Moved the ASUS about two feet away, which did not change the slowness. I don’t have any disabled ports and this configuration used to work just fine until we moved.