Conversation

Little-known quirk of DHCP: When assigning or renewing IPs, DHCP servers may ping the IP to check if it's available. A DHCP client who wants to keep the same IP address may momentarily stop responding to ping requests to encourage the DHCP server to do so.

The Linksys LAPAC1200 access points on my network do it. My network checking script occasionally picks up on that, and sends me false alerts. I may have to add a DHCP lease expiry check to the script in order to fix that.