[outages] Intermittent Comcast DNS issues from VT

[John Neiberger]

Frank is correct. Bill, please send over a traceroute to 75.75.75.75 and
75.75.76.76 and I'll forward that information to the DNS infrastructure
team.

Thanks,
John

On Fri, Oct 24, 2014 at 6:04 AM, Frank Bulk via Outages <outages at outages.org
> wrote:

> Bill,
>
>
>
> I believe Comcast has anycasted their DNS servers, so if you could provide
> a traceroute to each IP then if Comcast personnel are lurking they can
> better guess which one it is.
>
>
>
> Frank
>
>
>
> *From:* Outages [mailto:outages-bounces at outages.org] *On Behalf Of *Bill
> McGonigle via Outages
> *Sent:* Friday, October 24, 2014 4:34 AM
> *To:* outages at outages.org
> *Subject:* [outages] Intermittent Comcast DNS issues from VT
>
>
>
> Since about midnight (Eastern) Comcast's DNS (75.75.75.7[5,6]) has been
> giving timeouts and the occasional 'no route to host' from Vermont.
> Switched our resolvers to use Google's Public DNS (via the same Comcast
> line) and all services returned to normal.
>
> Packet traces aren't interesting (just outbound traffic, no responses) and
> traceroutes to the cdn usually succeed.  dns.comcast.net reports no
> problems.  Queries at the command line sometimes succeed, sometimes fail,
> sometimes take a long time to finish.
>
> -Bill
>
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