Tomorrow, Friday June 6th, we will be performing maintenance on the
network around 12:00 UTC. We'll do network migration in the form of a
subnet/vlan split, and upgrade the firmware on our core router in one go.
This means that most wikis/sites and services will be down for a couple
of minutes only, if no unexpected problems occur.
Mark Bergsma <mark(a)wikimedia.org>
System & Network Administrator, Wikimedia Foundation