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Solved What can I do when I get a DNS error when connection drops?

July 27, 2012 at 01:41:11
Specs: Windows 7
ISP - Comcast Cable Internet

Modem model SMCD3GNV wired/wireless combo (2 pcs connected 1 wired 1 wireless)

Down Freq 584.999

Down SNR 36.8

Power 4.8

Modulation 256 QAM

Up Freq 35999435 Hz

Up Symbol Rate 5120 KSym/sec

Power 38.75 dBmV

Modulation 64QAM

speedtest is fine (when connection is online) 30 up 10 down

Location: Colorado Springs, CO

When the connection is online, the speeds are fine- the issue is the 2-3 times a day when the connection drops off. The error that we are getting is "cannot connect with primary dns server" however in our attempts to restore the connection we have:

Proper power cycling equipment
ipconfig /flushdns /registerdns /release /renew
reset TCP/IP
change DNS servers to OpenDNS or Google's DNS
Repair connection through Windows
Disable/Re-enable adapter
being that the signal levels are within range what do you think the problem resides in? FYI, both connections, the wired and wireless connections both have connectivity issues equally.

See More: What can I do when I get a DNS error when connection drops?

July 27, 2012 at 02:49:08
✔ Best Answer
I would suggest, to write down an internet ip address from e.g.
When you get such problems, open command prompt (CMD) and type in:
ping ip_address_you_wrote_down

If this works, try this in the same command prompt window:
tracert ip_address_you_wrote_down

If you get only ip addresses back in the trace listing, there is a problem with the DNS server of your ISP.

If neither ping ip_address nor tracert ip_address works, it's most likely, that you lose the connection to your ISP. You may be able to figure this out in the routers logs.
So if you figure out, that your router lost connection to your ISP, you have to call your ISP to solve the problem.

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August 11, 2012 at 21:53:55
not to necro this thread but I wanted to update about the
situation. The outages have become more frequent, now they last 6 hours or more at a time. The gateway shows the connection as online (Linksys X2000) When we ping the gateway its fine, pinging any DNS server or website it is timed out. So what does that tell you? There has been techs to come out twice so far to look at the problem, 3rd tech scheduled to come tomorrow morning.

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