[tor-bugs] #32762 [Internal Services/Tor Sysadmin Team]: major networking issues on moly, affects: majus, fallax, web-cymru-01, build-x86-05, build-x86-06

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#32762: major networking issues on moly, affects: majus, fallax, web-cymru-01,
build-x86-05, build-x86-06
-------------------------------------------------+-------------------------
 Reporter:  emmapeel                             |          Owner:  anarcat
     Type:  defect                               |         Status:
                                                 |  accepted
 Priority:  Very High                            |      Milestone:
Component:  Internal Services/Tor Sysadmin Team  |        Version:
 Severity:  Major                                |     Resolution:
 Keywords:  translation, l10n, majus, moly       |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by anarcat):

 cymru responded and explained there was a networking change on their end
 that changed the MTU, which I suspected. at 20:40UTC, they said they
 implemented a workaround, but 4 minutes later, at 20:44UTC, they said the
 investigation was still ongoing.

 and now the *entire* cymru network is unreachable, at least as seen from
 nagios:

 {{{
 15:42:40 <nsa> tor-nagios: [mini-nag/auto-dns] moly.torproject.org is
 considered BAD (ping-check (50.00%)) @ 20:42:31 +0000.
 15:46:50 <nsa> tor-nagios: [gw-cymru] gw-cymru is DOWN: Date/Time: Mon Dec
 16 20:46:39 UTC 2019
 }}}

 above times UTC-5. so i'm not sure what's up with cymru, but clearly
 there's a huge outage going on there.

 now i'm really happy to have moved those other services off of that box...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32762#comment:5>
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