[cisco-voip] Bridge upgrade vs. sub(s)

[Andrii Matlavskyi]

Hi Beck!
Thank you for the information.

Could you please give any recommendations for upgrade steps considering the
fact that I don't have any server for intermediate upgrade steps to 6.x/7.x
version?

Mike, where can I find additional information about unsupportable database
in case of installation of CUCM version 7.x on VMWare and upgrading to 8.x?


2012/3/1 Beck, Andre <beck at ibh.de>

> Hi Andrii,
>
> On Thu, Mar 01, 2012 at 09:43:02AM +0200, Andrii Matlavskyi wrote:
> > Hi all!
> >
> > I need to make upgrade of CUCM version 4.1 to 8.6.
>
> Ugh. Tough luck. My upgrade from 4.1(3) was to 5.0. The last upgrade I
> had to do of a 4.x version turned out to be a manual takeover of all
> configuration (luckily, it was a small setup of less than 100 phones
> and a welcome break with old stuff and opportunity to clean up historic
> cuft). The reason for doing it manually was that I didn't trust DMA
> enough to install it on the SPOF fragile old non-clustered 4.x box
> (remember, DMA actually drops an entire RDBMS on the poor machine),
> and we couldn't get hold of *ANY* installation media for the OS in
> question. Original media was MIA, Cisco could provide CCM install media
> to no avail, but Win2k3 appliance OS media - no chance. So I tried
> for a while to prep a W2k3 install to accept CCM, but gave up on that
> finally - burned too much time. Time better used for a fresh start.
>
> What you can do depends entirely on software and hardware you have
> available or can get hold of.
>
> > Now CUCM is on DL380-G3.
> > New servers are UCS C200M2 with ESXi hypervisor.
>
> Uhm. So you want to go virtualized. That makes things a little harder,
> given
> Mike's advice to not run 7.x in a VM even as an intermediate step. The
> problem
> being, you cannot go from 4.x to 8.x directly as the DMA was phased out
> with
> 7.x the last supported target. And you need DMA.
>
> > So, we can't make direct upgrade from 4.1 to 8.6 and on DL380-G3 we can't
> > upgrade to any 8.x version.
> >
> > What can be the best upgrade scenarios?
>
> I would try to proceed as such:
>
> 1) Clone the existing 4.1 onto another machine. That could be another
>   DL380G3. If you can live with some downtime, it can be the one you
>   already have. If you must minimize downtime, and want to risk a DMA
>   on the original pub, there is no need to clone.
> 2) Install DMA (on the cloned or original 4.1) and produce a DMA dump
>   of the DB. Be aware that DMA is a full Informix install, a bunch
>   of scripts reading the old DB and merging it into new structures in
>   Informix, and finally a full dump of the Informix tables into an
>   external file.
> 3) On some hardware that is feasible, install 7.1(3) or something that
>   is similarly reliable, works on your hardware and you can get hold of
>   the media easily for (anything 6.x or 7.x should do). Import the DMA
>   to this machine.
> 4) Upgrade this machine to 8.6 and export using DRS (the standard backup
>   system that replaced BARS). The upgrade could be direct or bridged,
>   depending on hardware. It makes no difference, as all you want to
>   produce is a DRS backup.
> 5) Do a completely new installation of 8.6 in a VM on your target platform,
>   based on machine templates provided by Cisco, then restore from the DRS
>   backup. If it looks plausible, deal with licensing. Regarding licensing,
>   it *MAY* be necessary to deal with that already on the DMA import step
>   to 7.x. There was no device licensing on 4.x, so Cisco would just sign
>   you a license file produced in the DMA step. As licensing has changed
>   again in 8.6, it may be too late to start that process here. I simply
>   don't know, I don't even know if the process for licensing all your
>   phones on DMA upgrade is still available, but I assume it is.
>
> That's the raw sketchy outline of a plan I would start with. Details like
> to fill in themselves in the process, sometimes vigorously rearchitecting
> your nice theory ;)
>
> HTH,
> Andre.
> --
>                    Cool .signatures are so 90s...
>
> -> Andre Beck    +++ ABP-RIPE +++      IBH IT-Service GmbH, Dresden <-
>



-- 
З повагою, Андрій Матлавський.
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