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<div dir="auto">Hrm. There were definitely no routes for 129.134.31.0/24 from multiple route servers at around 14:00 UTC today, but I see that there are now routes for a containing /17 in AS 32934 now (20:25 UTC). <br />
<br />
You can see the /24 disappear:<br />
<br />
<a href="https://stat.ripe.net/widget/bgplay#w.resource=129.134.30.0/24&w.ignoreReannouncements=true&w.starttime=1633348800&w.endtime=1633363186&w.rrcs=0,1,2,5,6,7,10,11,13,14,15,16,18,20&w.instant=null&w.type=bgp" target="_blank">https://stat.ripe.net/widget/bgplay#w.resource=129.134.30.0/24&w.ignoreReannouncements=true&w.starttime=1633348800&w.endtime=1633363186&w.rrcs=0,1,2,5,6,7,10,11,13,14,15,16,18,20&w.instant=null&w.type=bgp</a><br />
<br />
-Rich </div>
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<div dir="auto"><strong style="color:#212121;font-family:Helvetica, Arial, sans-serif;font-size: 10px">Rich Lafferty</strong><span style="color:#212121;font-family:Helvetica, Arial, sans-serif;font-size: 10px"> </span><span style="font-size: 10px"><br /></span><a style="color:#477ccc;font-family:Helvetica, Arial, sans-serif;font-size: 10px" href="mailto:rich@lafferty.ca" target="_blank">rich@lafferty.ca</a><span style="color:#212121;font-family:Helvetica, Arial, sans-serif;font-size: 10px"> / 647-377-1165</span><span style="font-size: 10px"><br /></span><span style="color:#212121;font-family:Helvetica, Arial, sans-serif;font-size: 10px">Toronto, Canada</span><span style="color:#000000;font-family:Helvetica, Arial, sans-serif;font-size: 10px"> </span><span style="font-size: 10px"><br /></span><a style="color:#477ccc;font-family:Helvetica, Arial, sans-serif;font-size: 10px" href="http://www.lafferty.ca" target="_blank">http://www.lafferty.ca</a><br />
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<div name="messageReplySection">On Oct 4, 2021, 5:01 PM -0300, Peter Knapp <Peter.Knapp@ccsleeds.co.uk>, wrote:<br />
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I’ve seen this BGP withdrawal cited in a number of places.<br />
<br />
However we peer with FB, and all four sessions are up and have been live for days/months (FB had maintenance on one peering router a couple of weeks ago) and all 30 prefixes are consistent and announced.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">The NS IP’s are in the announcements, but you can’t ICMP to them, or query them as NS for the auth records either..</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:navy">Peter Knapp</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif" xml:lang="EN-US">From:</span></b> <span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif" xml:lang="EN-US">Outages [mailto:outages-bounces@outages.org] <b>On Behalf Of</b> Rich Lafferty via Outages<br />
<b>Sent:</b> 04 October 2021 17:27<br />
<b>To:</b> Outages mailing list <outages@outages.org><br />
<b>Subject:</b> Re: [outages] Facebook.com no records?</span></p>
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<p class="MsoNormal">A carrier networking engineer friend of mine observed that the network that those DNS servers live in is no longer in the global routing table. Sounds like BGP issues rather than DNS ones, I guess. (I won’t admit to understanding BGP.)<br />
<br />
-Rich </p>
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<p class="MsoNormal"><strong><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121">Rich Lafferty</span></strong><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121"> </span><span style="font-size:7.5pt"><br /></span> <a href="mailto:rich@lafferty.ca" target="_blank"><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#477CCC">rich@lafferty.ca</span></a><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121"> / 647-377-1165</span><span style="font-size:7.5pt"><br /></span> <span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121">Toronto, Canada</span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-size:7.5pt"><br /></span> <a href="http://www.lafferty.ca" target="_blank"><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#477CCC">http://www.lafferty.ca</span></a><br />
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<p class="MsoNormal">On Oct 4, 2021, 1:14 PM -0300, Jon Sands via Outages <<a href="mailto:outages@outages.org">outages@outages.org</a>>, wrote:<br />
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<p class="MsoNormal">Seems the facebook.com domain no longer has any DNS records? Getting<br />
nxdomain from most clients, same when digging @ 1.1.1.1 8.8.8.8 etc<br />
<br />
<a href="https://toolbox.googleapps.com/apps/dig/#A/facebook.com">https://toolbox.googleapps.com/apps/dig/#A/facebook.com</a><br />
<br />
--<br />
Jon Sands<br />
MFI Labs<br />
<a href="https://fohdeesha.com/">https://fohdeesha.com/</a><br />
<br />
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