DNS errors RBK753

Ok, keep us posted. Possible ISP, DNS issue here as well with your specific ISP...

I've had this firmware since the weekend and I haven't had any DNS Issues pop up on my end.  I do change my DNS Servers to OpenDNS through the Router GUI and have IPv6 Enabled (also using OpenDNS).

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Ace321 wrote:

I just tried following 2 steps and it may have resolved the issue. However I need to wait for couple of days to confirm.

 

1) Hard reset router and satelites.

2) After reset step I set static DNS primary as 75.75.75.75 (Comcast) and Secondary DNS 208.67.222.222.

 

I tried step 2 without step 1 and it did not work. I tried hard reset without Step 2 and that solution did not work either.

 

If this continue to work, it may be a firmware issue vs hardware issue.

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I'm watching this thread.  As a data point, for my Orbi units, I'm not using the ISP (Verizon FIOS) DNS servers but instead, have mine pointing to:

Primary: 1.1.1.1 - Cloudflare

Secondary: 8.8.4.4 - Google

One thing that I did to get the most optimal DNS Servers for my location was using a tool named DNS Benchmark.  It will test a bunch of different DNS Servers for you and spit out a report to let you know which ones are the most ideal, which ended up being OpenDNS for me.  I used to also use Google DNS, both of which outperformed the Comcast DNS Servers in my area.

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campolo313 wrote:

One thing that I did to get the most optimal DNS Servers for my location was using a tool named DNS Benchmark.  It will test a bunch of different DNS Servers for you and spit out a report to let you know which ones are the most ideal, which ended up being OpenDNS for me.  I used to also use Google DNS, both of which outperformed the Comcast DNS Servers in my area.

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Regarding DNS Benchmark, is it this?  Thanks for the tip!

https://www.grc.com/dns/benchmark.htm

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dtay wrote:

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campolo313 wrote:

One thing that I did to get the most optimal DNS Servers for my location was using a tool named DNS Benchmark.  It will test a bunch of different DNS Servers for you and spit out a report to let you know which ones are the most ideal, which ended up being OpenDNS for me.  I used to also use Google DNS, both of which outperformed the Comcast DNS Servers in my area.

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Regarding DNS Benchmark, is it this?  Thanks for the tip!

https://www.grc.com/dns/benchmark.htm

 

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Yup! That's the one

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campolo313 wrote:

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dtay wrote:

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campolo313 wrote:

One thing that I did to get the most optimal DNS Servers for my location was using a tool named DNS Benchmark.  It will test a bunch of different DNS Servers for you and spit out a report to let you know which ones are the most ideal, which ended up being OpenDNS for me.  I used to also use Google DNS, both of which outperformed the Comcast DNS Servers in my area.

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Regarding DNS Benchmark, is it this?  Thanks for the tip!

https://www.grc.com/dns/benchmark.htm

 

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Yup! That's the one

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I installed and ran it and was surprised at the results; I would have thought the "big boys" such as Google, OpenDNS, etc. would be the top but instead I see a lot of names that I don't recognize as being the fastest:

1st place: 129.250.35.250 - x.ns.gin.ntt.net - NTT-COMMUNICATIONS-2194

2nd place: 156.154.70.1 - rdns1.ultradns.net - ULTRADNS

3rd to 5th place were ULTRANDNS servers

6th place was NTT-COMMUNICATIONS again

7th place was ULTRADNS

8th place was OPENDNS

9th place was ULTRADNS

10th place was OPENDNS

Interesting!

I recommend running any DNS benchmarks with a wired PC directly connected to the ISP modem or ONT. Running behind a router could cause inaccurate results. I used to use Googles DNS Namebench years ago. Good program. 

Update: Although frequency of errors have reduced significantly but they still happen when visiting a new website (not in cache). I am going to get a replacement from Costco, test and provide an update.

Sounds good, let us know how it goes. 

I have not seen any DNS issues thus far. I did try a few new sites as well, places I don't normally go. CNN and such. All came up quickly. 

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Ace321 wrote:

Update: Although frequency of errors have reduced significantly but they still happen when visiting a new website (not in cache). I am going to get a replacement from Costco, test and provide an update.

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I also still see it with my RBR50 and the latest V3.2.16.6_1.4.4 firmware.  I don't believe it is a hardware issue.  You can't fix it by changing the Orbi DNS settings.  The only thing I've found to make it go away is setting my Windows network connection properties DNS to point directly to the external DNS server IP address (and not gateway/router IP).  Fortunately, this is a minor inconvenience during browser sessions and my browser automatically retries after a very short interval (less than a second).

I would make contact with NG support and let them know what your seeing and having problems with. Seems like this maybe a FW, ISP service issue that is specific with the ISP you guys are using. NG should be able to correct this. Be sure to capture debug logs. 

Ok, keep in contact with them then. Fix won't be over night, so please be patient. Have them help you collect debug logs if they haven't already. Hopefully they can fix it as soon as possible.