How are you doing DHCPv6 ?

Randy Carpenter rcarpen at
Sat Jan 21 19:05:03 UTC 2012

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.


On Jan 21, 2012, at 12:31, Jimmy Hess <mysidia at> wrote:

> On Sat, Jan 21, 2012 at 7:03 AM, Bjørn Mork <bjorn at> wrote:
> Randy Carpenter <rcarpen at> 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

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