The ability to provide a new/different IP every time has been oft-discussed on ISC' dhcp-user listserv. IIRC, it contradicts the spec. You would have customize the code to have that functionality, or, as someone said, play with the leases file.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Justin Shore Sent: Monday, February 09, 2009 1:30 PM To: Church, Charles Cc: [email protected] Subject: Re: [c-nsp] DHCP Binding Expiration <snip> One thing on my to do list is to figure out how to always reject lease extension requests to force the CPE to pull a new IP every time a lease expires. This would prevent many of the less technical users from trying to run a publicly-accessible server. Set the lease time to 2 hours, client tries to extend the lease at 50% of the lease (1hr) and the server NAKs. The only question is will the client continue to request the IP until the lease expires before falling back and do a DISCOVER at the 2hr mark (interrupting the flow of traffic) or will it do a bcast DISCOVER in response to the NAK and immediately switch to the new IP once it gets an OFFER 1hr before the original lease expires, thus interrupting traffic again. I've seen systems do something similar before (or at least I thought they were). When I first got Cox CATV I could only keep my IP for about a day before it changed. One way to mitigate the flow of traffic problem would be to grant short lease extensions automatically until the wee hours of the morning and then force the change. Something to think about. It's on my list right behind setting up an OSS walled garden and convincing the boss to replace our 7 different DHCP & provisioning systems with CNR. Oh, and finishing my IPv6 deployment. Thanks for the info Justin _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
