Several people have mentioned clustering software. Does any one have any examples of such a thing that supports v4 and v6? We have always used the built in failover in ISC dhcpd, and it works nicely. I don't understand why they felt it would not be needed in v6. -Randy On Jan 21, 2012, at 12:31, Jimmy Hess <mysidia@gmail.com> wrote:
On Sat, Jan 21, 2012 at 7:03 AM, Bjørn Mork <bjorn@mork.no> wrote: Randy Carpenter <rcarpen@network1.net> writes:
Duplicate assignments are not a problem as long as you ensure that the client is the same.
Duplicate assignments to different clients also won't be established if your standby server has access to an identical lease database at the moment your clustering software determines that the primary server has failed, kills the primary, and places the secondary in service.
A sufficiently long lease duration should also be as good as a static lease, in that case. Because all the important details are in the database.
You don't have to have any coordination in the DHCP software; you just in some cases, need to exclude the DHCPD daemon from simultaneously being active on multiple machines.
-- -JH