FUCKUP #009: The DHCP Scope Was Full of Leases the Console Could Not See
The symptom After a power outage, PoE-powered network clocks restarted and flooded the network with DHCP requests. The Windows DHCP server stopped returning normal offers, and its logs filled with repeated NACK entries. From memory, roughly 100 clocks were involved. They were showing the wrong time, and no other affected devices were noticed. What made it weird The DHCP console told two different stories. At the time, the affected scope was described as nearly full, but the ordinary lease list showed far fewer leases. ...