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I'm getting very high pings (2000-10000ms), and intermittent internet connection when using a wireless router (be it on LAN or WAN). When connecting a desktop directly to the cable modem, there are no issues so I think I've isolated the problem to the router. However, even after a factory reset to the router the issue still persists. It began a few days ago and was intermittent, but is now permanent. If I ping from the desktop or from the router control page itself, I get the same results (2000-10000ms). Some websites do not respond to pings at all, while some do. I also get very high pings on Google DNS (8.8.8.8).

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    What if you plug wired into the wifi router? Can you isolate whether it is the router itself, or the wifi connection to the router?
    – Paul
    Jul 28, 2014 at 0:29
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    The same issues occur if I am wired to the wifi router so I think it may be the router itself. I've also tried replacing the physical cable between the router and the modem, and the router and PC.
    – Zach
    Jul 28, 2014 at 1:06
  • Is the problem just with synthetic tools like ping? Or do you see issues in real world applications? Do your upload/download rates (measures with speedtest or similar) show an issue?
    – David Schwartz
    Jul 28, 2014 at 1:36
  • How is the router connected to the cable modem? Via LAN ports or WAN port? If the former, have you disabled DHCP on one or the other?
    – Paul
    Jul 28, 2014 at 1:49
  • The problem is not just with the tools. Some websites will not load at all, some will load very inconsistently. If I manage to get a speed test site to load, the connection speed is fine. The problem is getting one to actually load. As for the router, it is wired to the modem.
    – Zach
    Jul 28, 2014 at 2:07

1 Answer 1

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Enabling Advanced DNS Service on D-Link routers causes it to route DNS requests through a service called OpenDNS. Unchecking it will instead use your ISPs DNS servers, or you can manually configure other DNS servers to use. It could be that there are/were some network path issues between your router and the OpenDNS servers your D-Link router was attempting to use, or the OpenDNS servers may have been suffering from issues of their own (network issues, DoS attack, etc). I usually use my ISP's DNS servers, unless I'm finding that their DNS servers are laggy, in which case I switch to Google Public DNS - IP address 8.8.8.8.

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