An unusual way for your DHCP server to run out of dynamic IPs
Summary
Chris Siebenmann explains a novel DHCP failure mode where a host answers ICMP pings for every IP, causing the ISC DHCP server to exhaust its dynamic pool. The post cites ping-check behavior and shows sample logs like 'Reclaiming abandoned lease' and 'Abandoning IP address: pinged before offer'. It also discusses the challenges of locating the offending host in a real network.