update downtime

sn_collections/_downtime/2024-12-18-ceres.md

@@ -0,0 +1,12 @@
+---
+date-start: 2024-12-18 07:00:00
+tzid: 'America/Chicago'
+duration: PT9H
+time: 8am-5pm ET
+systems: Ceres
+locations: All
+reason: Network Updates
+---
+
+The primary ARS SCINet network switch at Ames will be upgraded on Wednesday December 18th between 8am-5pm Eastern. The upgrade should only take 1-2 hours, but the whole day is reserved in case there are any unexpected issues.
+Connections to Ceres cluster may be affected.