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[public-dns-discuss] Re: Google DNS Possible Routing Issue? Or Load Balancer Issue?





On Thursday, August 22, 2019 at 2:26:36 PM UTC-5, Alex Dupuy wrote:
Google Public DNS is a DNS service, not an ICMP service. So to measure the quality of service, you should be sending DNS queries, not ICMP packets.

A few ICMP drops, or particularly long response times for a ping, are normal and can be expected. If you are very concerned about reliability, you should use a dnsping tool (see https://groups.google.com/forum/#!msg/public-dns-discuss/p1o62SJElck/w0flYsmqBQAJ).
[Note that the 100 QPS rate limit mentioned in that linked post has since been increased several times.]

Interesting. Have never seen this be an issue in the past though... also will say that this is not occurring occasionally, it is constant. I did however run the DNS checker and response times are around 10 ms.   

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