CIS Maintenance Weekend this weekend.

This is a reminder of the outage happening this weekend. The takeaway is still the same, anything behind the lab’s firewall will be unavailable for a brief time tomorrow morning, with some periods of up and down time throughout the morning. Things should all be normal by noon.
The official story from CIS is that e-mail and other services are not affected, but that’s not going to be the case. As such, the official announcement from them isn’t accurate and I don’t want to send it on since it implies a false sense of what the situation really is.
So be prepared for brief outages of lab-hosted services tomorrow between 8 and noon.
Thanks. My original notice follows below.
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CIS Maintenance weekend is the weekend after this coming one. I normally forward these announcements on to you, but I noticed some possible errors in the list of affected services, and I want to get some clarification from them on it. I’ll send a complete list when I have it, however based on the fact that the Argonne network will be undergoing a major upgrade on the morning of Saturday, January 16, we can expect access to services from offsite that are behind the lab’s firewall to be inaccessible.
While this does not include services Systems runs here in building 240, nor does it include ALCF’s machines, it does include services hosted in building 221. This includes lab e-mail, lab web servers (includinghttp://www.mcs.anl.gov), and services that Systems runs in that building. Because that building has the most stable power situation (generator-backed UPS), we’ve housed all our critical servers there including Systems-provided websites and services such as WordPress, Mediawiki, Confluence, Jira, gitlab, etc.
The official outage window is from 8AM through noon, though the work is expected to take no more than an hour if things go as expected; the extra time is for the unexpected.
I’ll send an official list of affected services once it’s nailed down, but I wanted to get this word out quickly in case there are issues we need to be aware of regarding sustaining the outage at that time. If it poses a particular problem for you, let me know.