Hello drainsurgeon007,
I don't know if these settings help but it can't hurt. Here is some information for you. Some settings that might help you. The url's are for the product pages for the different versions of the wndr3700.
Use the Genie Software and if necessary change some of the information.
Setup - WAN Setup - ADVANCED
MTU Size(in bytes) 1496 bytes (not 1500)
Wireless - BASIC
Wireless Network (2.4GHz b/g/n)
Enable Wireless Isolation
Enable SSID Broadcast
Name (SSID): NETGEAR20
Channel: 11
Mode: Up to 450 MBPS
Wireless - BASIC
Wireless Network (5GHz a/n)
Enable Wireless Isolation
Enable SSID Broadcast
Name (SSID): NETGEAR20-5G
Channel: 157
Mode: Up to 450 MBPS
url's are for the product pages for the different versions of your wndr3700
WNDR3700v1
N600 Wireless Dual Band Gigabit Router
Downloads
WNDR3700v2
N600 Wireless Dual Band Gigabit Router
WNDR3700/WNDR37AV Firmware Version 1.0.16.98 - BETA
WNDR3700/WNDR37AV Firmware Version 1.0.7.98
WNDR3700 Firmware Version 1.0.4.68
WNDR3700 Firmware Version 1.0.4.55
WNDR3700 Firmware Version 1.0.4.49
WNDR3700 ReadyShare Connect Utility
WNDR3700 Initial Release Firmware - Version 1.0.4.31
Show All Versions
WNDR3700v1
WNDR3700v2
N600 Wireless Dual Band Gigabit Router
Downloads
ReadySHARE™ Access
WNDR3700v2/WNDR37AVv2 Firmware Version 1.0.0.12
WNDR3700v2 Firmware Version 1.0.0.10 - BETA
WNDR3700v2/WNDR37AVv2 Firmware Version 1.0.0.10
WNDR3700v2/WNDR37AVv2 Firmware Version 1.0.0.8
WNDR3700v2 Firmware Version 1.0.0.6
Show All Versions
WNDR3700v2
WNDR3700v3
N600 Wireless Dual Band Gigabit Router
Downloads
ReadySHARE™ Access
WNDR3700v3 Firmware Version 1.0.0.22
WNDR3700v3 Firmware Version 1.0.0.18
Show All Versions
WNDR3700v3