[outages] Google DNS Admin on List ?

[Jason Hellenthal]

Not necessarily a response time issue. RTT is great! cache flushing is sometimes not all that up-to-par.

e.g. change a record and look for it to change on google. Sometimes there is a lasting change waiting to happen an hour later even though your TTL is far below that.

> On Oct 9, 2017, at 07:18, Paul M - outages via Outages <outages at outages.org> wrote:
>
> On 9 October 2017 at 12:29, Jason Hellenthal via Outages
> <outages at outages.org> wrote:
>> Currently seeing Google public DNS A and B, still responding well past $TTL for two domains. TTL is currently at 300 for a week or more and our changes went in place over an hour ago.
>>
>> Flush cache or contact off list for details of the domains.
>
> I've not seen any problems from here in the UK, I monitor the
> responsiveness of their DNS as it's also a useful measure of my
> upstream having problems, I'm seeing a consistent 20ms response time
> from 8.8.8.8 and 8.8.4.4.
>
> this previous posting might be useful to identify which Google DNS
> cluster you're using:
> https://puck.nether.net/pipermail/outages/2017-August/010707.html
>
>
> memo to self: add IPv6 dns checks for 2001:4860:4860::8888 and
> 2001:4860:4860::8844
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--
 Onward!
 Jason Hellenthal
 Systems & Network Administrator
 Office: +1 (262) 207-2586
 LP-170 / JJH48-ARIN



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