failover compatibility

Campbell.ColinD at police.qld.gov.au Campbell.ColinD at police.qld.gov.au
Wed Sep 5 04:30:54 UTC 2012


Hi, 

Thanks for that. That brings a new quandary.

I can't upgrade both servers simultaneously. I have to do one at a time.
In doing so, I plan on shutting one down, upgrading it, restoring the
configs, shutting down the other old server and doing something with the
leases on the new server. That something could be:

a) let the new server create a new leases file, or
b) copy the leases file from the still-active old server

Is (a) or (b) preferable? If neither, what is the correct procedure?

Colin
--
Colin Campbell
Security Specialist
Public Safety Network Management Centre
p: (07) 3008 4851
f: (07) 3008 4799
e: campbell.colind at police.qld.gov.au


> -----Original Message-----
> From:
dhcp-users-bounces+campbell.colind=police.qld.gov.au at lists.isc.org
>
[mailto:dhcp-users-bounces+campbell.colind=police.qld.gov.au at lists.isc.o
rg]
> On Behalf Of Glenn Satchell
> Sent: Wednesday, 5 September 2012 2:11 PM
> To: Users of ISC DHCP
> Subject: Re: failover compatibility
> 
> No. The failover protocol changed somewhere in the 3.1 to 4.x range.
> Details would be in the RELNOTES file distributed with the source.
> 
> Essentially you need to shutdown and upgrade both failover hosts at
the
> same time. You can pre-check the format of dhcpd.conf and dhcpd.leases
> using dhcpd -t and dhcpd -T to see if there are any issues wit the new
> version. In general, the files *should* be compatible with all newer
> versions.
> 
> regards,
> -glenn
> 
> On Wed, September 5, 2012 8:24 am, Campbell.ColinD at police.qld.gov.au
wrote:
> > Hi,
> >
> > Will a 3.0.5 server form a failover pair with a 4.x server? This
would
> > be a temporary arrangement during a server pair upgrade.
> >
> > Colin
> > --
> > Colin Campbell
> > Security Specialist
> > Public Safety Network Management Centre
> > p: (07) 3008 4851
> > f: (07) 3008 4799
> > e: campbell.colind at police.qld.gov.au
> >
> >
> >
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