Delays of up to 30 seconds resolving DNS when plugged in to or Wif Connected to second router.
Ping can take just as long via domain name, near instant via IP No problems when connecting directly to the router with direct internet connection
Problem presents regardless of OS or of the connection method (wired vs wifi)
Infrastructure Physical Setup:
Plusnet provided Technicolor TG582n (4 x 100 Mbit, Wifi) - Connected to ISP over ADSL
D-Link DSR-250n (8 x 1000 Mbit, Wifi) - Connected to above router using WAN port PC - Connected to D-Link, wired Laptop - Connected to D-Link, Wi-Fi Numerous android devices
Software / Firmware Settings:
- ADSL router - Wifi off. DMZ set to 2nd router. IP 192.168.1.254
- D-Link router - WAN interface IP 192.168.1.66. Internet set up as "Dynamic IP (DHCP)" and DNS as "Get dynamically from ISP"
LAN IP 192.168.0.200. DHCP server on. DNS servers 18.104.22.168 (primary) 22.214.171.124 (secondary). DNS Proxy off.
Setting DNS server IPs manually on client PC, tablet etc... No improvement
Disabling DNS Proxy on Router no effect
Disabling DHCP on second router manually setting IP/DNS/Gateway