On Tue, Aug 22, 2023 at 09:41:48AM -0400, Greg Troxel wrote: > > > Is there a way to "free" their entries, to let dhcpd(8) forget about > > them, so that the relative IP addresses are re-usable? Each device > > which receives an IP address is recorded in /var/db/dhcpd.leases. Is it > > enough to manually delete its entry in that database file, or some > > other operation is needed? > > This works and I do it all the time. >
The lease time is supposed to control how quickly the IP addresses are reused - half way through the lease time the client is supposed to renew the address, if this happens then the lease time is restarted. If the client fails to renew the address and does not renew it at the expiry time then the address will be reused. So, you could reduce your lease time so ephemeral devices will get a lease and it will be released quickly. The balance being if you have devices that you want having the same address are off for a while then they may not get the same address again. For those you could statically assing a particular mac address an IP and have another part of the range available for dynamic allocation. -- Brett Lymn -- Sent from my NetBSD device. "We are were wolves", "You mean werewolves?", "No we were wolves, now we are something else entirely", "Oh"
