migration suggestions

McDonald, Dan Dan.McDonald at austinenergy.com
Tue Aug 18 21:29:07 UTC 2009

On Tue, 2009-08-18 at 22:33 +0200, sthaug at nethelp.no wrote:
> > I have a failover pair of dhcp servers running ISC DHCP version 3.1.2p1,
> > let's call then "A" and "B"  There are about 130 subnets, on 106
> > different routers, served by these two dhcp servers  For various reason,
> > I need to migrate to a new set of servers, let's call them "C" and "D",
> > and the IP address of "C" and "D" can't be the same as "A" and "B".
> > 
> > What would be the cleanest way to transition from the first set to the
> > second?  I'm envisioning something on the order of:
> If your clients depend on reasonably continuous service, you'll have
> to do something along these lines.
> If your clients can live with some downtime (remember, this will only
> affect *new* clients which don't already have a lease), you can shut
> down everything and move it all in one go.

wouldn't that cause IP conflicts, as the new infrastructure wouldn't
know the old leases?

Daniel J McDonald, CCIE # 2495, CISSP # 78281, CNX
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