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<div class="moz-cite-prefix">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.<br>
<br>
-Mike<br>
<pre class="moz-signature" cols="72">Michael T. Voity
Network Engineer
University of Vermont
</pre>
On 10/24/2014 8:48 AM, John Neiberger via Outages wrote:<br>
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cite="mid:CAOQYbjr1W6Eyq7Nzy40AC_d4oiguEGUU+dMiX+Af5a60r4Mqkw@mail.gmail.com"
type="cite">
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<div class="gmail_default" style="font-family:tahoma,sans-serif">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.</div>
<div class="gmail_default" style="font-family:tahoma,sans-serif"><br>
</div>
<div class="gmail_default" style="font-family:tahoma,sans-serif">Thanks,</div>
<div class="gmail_default" style="font-family:tahoma,sans-serif">John</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Oct 24, 2014 at 6:04 AM, Frank
Bulk via Outages <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:outages@outages.org"
target="_blank">outages@outages.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Bill,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">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.</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Frank</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
Outages [mailto:<a moz-do-not-send="true"
href="mailto:outages-bounces@outages.org"
target="_blank">outages-bounces@outages.org</a>] <b>On
Behalf Of </b>Bill McGonigle via Outages<br>
<b>Sent:</b> Friday, October 24, 2014 4:34 AM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:outages@outages.org" target="_blank">outages@outages.org</a><br>
<b>Subject:</b> [outages] Intermittent Comcast DNS
issues from VT</span></p>
<span class="">
<p class="MsoNormal"> </p>
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<div>
<div>
<p class="MsoNormal"
style="margin-bottom:12.0pt">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.</p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Packet
traces aren't interesting (just outbound
traffic, no responses) and traceroutes to the
cdn usually succeed. <a moz-do-not-send="true"
href="http://dns.comcast.net" target="_blank">dns.comcast.net</a>
reports no problems. Queries at the command
line sometimes succeed, sometimes fail,
sometimes take a long time to finish.</p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">-Bill</p>
</div>
</span></div>
</div>
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