[cisco-voip] Question about Unity Connection 8.x cluster - mix different server platforms?

[David Lee]

Hi Jason,

My concern is more for TAC support.  If I did have a mix cluster, I would
make the smaller server primary, and failover to the larger server, and only
configure the number of ports / mailstore per the smaller server.

Regardless, Cisco is a stickler to their documentation, and the document
clearly says "For a cluster with two physical servers, both must have the
same platform overlay."

http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/requirements/8xcucsysreqs.html#wp360177

<http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/requirements/8xcucsysreqs.html#wp360177>Therefore,
I would not try to add a 7825 to an existing 7835 to form a cluster, even if
the subscriber count is well under 1000.  If I did, I would want someone
else (ie. customer) to understand that it may not be TAC supported.

Thanks for your reply.  It's good to have this forums to exchange ideas.

-Dave


On Tue, Mar 29, 2011 at 8:52 AM, Jason Aarons (US) <
jason.aarons at us.didata.com> wrote:

> The concern is what happens in a failover, can a larger server failover to
> a lower class platform overlay and handle the same load, usually not.  I
> would keep them same platform overlay.
>
>
>
> If you have 10 mailboxes on great big 7945 and you failover to 7825 no
> worries. But 20,000 mailboxes failing over to 7825 might be a disaster…Same
> concern with CallManager servers. In CCM you could have a larger server
> backup two+ smaller servers with oversubscription ratio assuming both
> wouldn’t fail at same time.
>
>
>
>
> http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/supported_platforms/8xcucspl.html#wp658926
>
>
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *David Lee
> *Sent:* Tuesday, March 22, 2011 8:50 PM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] Question about Unity Connection 8.x cluster - mix
> different server platforms?
>
>
>
> Hello,
>
>
>
> I understand that for a UCM cluster, you can use different servers (i.e.
> 7825/7835/7845) in the same cluster.  It is less clear whether you can do
> that in a Unity Connection cluster.  For example, can I run a Unity
> Connection 8.x cluster with both a MCS-7835 and MCS-7825 servers as
> publisher / subscriber?  I understand that the capacity will be based on the
> smaller server, but I like to know if this is a supported architecture.
>
>
>
> Thanks in advance.
>
>
>
> -Dave
>
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