When I look at the TTL (Time to Live) for PTR records (Reverse Lookup Zone) on one of our Windows 2003 DNS servers I see some are at 15 minutes, others are at 20. They have "Delete this record when it becomes stale" checked.
- These PTR records are for workstations that get IPs from Windows DHCP, so I think that creates the PTR records dynamically?
- How is TTL for these records set?