Today eeden.wikimedia.org aka ns2.wikimedia.org was offline from the network for ~14 minutes. The icinga alert boundaries in IRC were 16:05 -> 16:19 UTC.
I was able to log in manually on the console as root and confirm no apparent local issues on the machine. It was un-pingable even from other hosts on the same network and could not ping its default gateway. tcpdump confirmed normal ns2 DNS requests were flowing into it on the ethernet port, and that it was responding on the ethernet port as well. However, on its switch (csw2-esams), the interface statistics were showing a normal-ish outbound pps (elsewhere->eeden), but zero pps inbound (eeden->elsewhere). There were no link state changes anywhere near this time window for this port.
Can we figure out why this happened from switch logs?