UPDATE:
12/22 @ 1540 – Network is stable. Emergency ticket has been resolved.
12/22 @ 1525 – The network is now stabilized as of 1515, and we believe we have isolated the issue. ITS Datacom and Security continue to investigate root cause.
12/22 @ 1420 – We have had reports of connectivity issues from several customers behind the UCSD firewall modules in the SDSC data center. UCSD has been contacted and is looking into the issue currently.