ITS Service Status Report

Scheduled Maintenance — Resolved

In-building Networks, BlueCat DHCP Servers - Change Syslog from UDP to TCP

Start Time: 05/07/2018 10:30 am

Maintenance Completed: 08/31/2018 11:08 am

No interruption to users, no outage. Background config changes to syslog.

Issue Symptoms: None

Technical Details

Service Type: Production

Server Name: adonis*.umnet.umich.edu, bdds*.umnet.umcih.edu, bam*.umnet.umich.edu

Comments:
The BlueCat servers use UDP syslog by default, but we have found that it is silently losing data. Changing the BlueCat servers one by one over the next month from UDP to mandarin.dsc to TCP to legion.dsc. The resulting logs in Splunk are expected to be significantly larger, which is why we are moving only one server each day, while watching the load on Splunk and legion. There are about 20 BlueCat servers to be updated.

2018-06-13 Move end date to 6/29. Taking longer than expected.

2018-07-01 Extend for another month, still working with the Splunk team.
2018-08-02 Extend.
2018-08-31 Closing. All but two production servers converted. Will do after freeze.

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