Aging and scavenging removes active host records unexpectedly

Scenario

Active devices disappear from DNS even though they are online and in use.

Recommended Resolution Path

1. Review scavenging intervals, timestamps, and whether the devices actually refresh records.
2. Check static entries masquerading as dynamic or vice versa.
3. Tune scavenging only after understanding the registration behavior of each device class.
4. Capture which records were removed so you can separate policy from bug.

Technician Notes

Capture the exact scope of impact, confirm which dependency failed first, and document whether the issue reflects broader domain or server drift.