ITS Service Status Report

Scheduled Maintenance — Resolved

swap DNS Anycast addresses on two central DNS resolvers

Start Time: 09/15/2018 11:00 pm

Maintenance Completed: 09/16/2018 3:55 am

No outage expected.

Issue Symptoms: Degradation

Technical Details

Service Type: Production

Server Name: ns-core-seb-1.dsc.umich.edu, ns-core-fxb-1

Comments:
We have detected a small latency in some DNS responses and will swap server Anycast addresses on two of the four core resolvers to determine whether the servers or their network location has an effect on the latency.

Testing found some interesting results. Voyance graphs showed changes different than expected. ns-bin-seb-1 did not get any traffic when configured for 10.10.5.5. Will do more testing in the future.
Put everything back the way it started.

Groups Notified:

Report Additional Impacts