Per @BBlack, during the recent esams rebuild:
- The esams NTP server IPs did change in the process of rebuilding the site: they were 188.8.131.52 and 184.108.40.206, now they're 220.127.116.11 and 18.104.22.168.
- All DNS client config should use the single nameserver IP "10.3.0.1" everywhere globally.
For server infrastructure, this was deployed with Puppet. For network gear, this will deployed with Homer.
That leaves esams' a) PDUs b) SCS that need to be updated manually.