[TriLUG] Windows DHCP to ISC DHCP migration
shawnlhood at gmail.com
Wed Oct 24 17:29:25 EDT 2007
Large pool and a number of reservations.
On 10/24/07, Chris Bullock <cgbullock at yahoo.com> wrote:
> Are you using reservations or just have a big pool? I would shorten the
> lease to say an hour. The protocol will try to renew in 30 minutes. So
> after all devices get the 60 minute lease, I would stop the windows dhcp
> service and then start dhcpd.
> --- Shawn Hood <shawnlhood at gmail.com> wrote:
> > Folks,
> > Situation:
> > 1) Want to move DHCP services for a pretty sizable userbase to a linux
> > dhcp
> > implementation
> > 2) Cannot have everyone shut off their computers or release/renew their
> > lease
> > 3) Limited IP space within subnet, so the DHCP servers must serve from
> > the
> > same address pool
> > Possible solutions:
> > 1) Import leases from Windows, which I don't think is possible
> > 2) In #trilug there was some mention of doing a failover setup, but the
> > servers must be able to communicate. The leases aren't replicated by
> > the
> > secondary server listening to dhcp broadcasts and taking notes in
> > preparation for failover. There is no way, to my knowledge, that
> > failover
> > can be configured in such a manner between windows dhcp and dhcpd.
> > 3) Shorten the lease time to a very small number, wait for all
> > workstations
> > to cycle. Shut off the Windows DHCP and startup Linux.
> > It seems as if 3 is the best option. Your input?
> > Shawn
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