On Thu, 5 Jan 2012, Timothy Murphy wrote: > Why is the default lease-time set to only 10 minutes (600 seconds) > in /etc/dhcp/dhcpd.conf (CentOS-6.2) as distributed? I assume the dull answer is: because that's what Redhat set it to. > Why is not set to a much longer time? What length do you think the correct default should be? > Is there any disadvantage in doing that? > Or conversely, is a short lease-time safer in some way? Short lease times work better with very transient devices, since the IP address is returned to the pool much faster when a machine disconnects but doesn't release the DHCP lease. jh