On Jan 18, 2008 11:19 PM, <[EMAIL PROTECTED]> wrote: > What happens when your DHCP lease expires? > > The duration of a lease isn't that long so it must happen often. > > The only sane thing I can think of is that *nothing* happens until you try to > ask for another lease such as during a reboot. > > The only flaw in this I can see for a greedy ISP is that if the client is a > stable server then it may have uptimes of months. That effectively is a > static > IP address and the ISP can't do anything about it!? > > Chris
My understanding is that when 50% of the lease is up, the client sends a request to the DHCP server that gave it it's current lease and send a DHCPRequest for a new one. If the client doesn't get a reply with a DHCPOFFER by the time the lease is 75% through, it tries again. If it still has no reply by the time 87% of the lease is through, the client gives up on the original DHCP server and sends a general DHCPDISCOVER broadcast to any available DHCP server. The normal discover-offer-request-acknowledge process then takes over. The idea is never to allow the lease to expire. Robert Donovan -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
