[outages] Intermittent Comcast DNS issues from VT

[Michael T. Voity]

At home I have Comcast in Colchester, VT, I have systems monitoring a 
bunch of points from outside and inside including a RIPE ATLAS PROBE,  
using Comcast DNS listed below.   None of my systems reported an drop or 
degradation of any service.   Sorry, I do not have a mtr to provide.

-Mike

Michael T. Voity
Network Engineer
University of Vermont

On 10/24/2014 8:48 AM, John Neiberger via Outages wrote:
> 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 <mailto: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
>     <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 <mailto: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 <http://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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