[cisco-voip] CallManager DR scenario

[Ortiz, Carlos]

Hey it's a disaster.......Move that subnet...... :)

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Voll, Scott
Sent: Monday, June 26, 2006 2:31 PM
To: Ted Nugent; Carter, Bill; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] CallManager DR scenario

Then have fun with all the IP changes, etc.

-----Original Message-----
From: Ted Nugent [mailto:tednugent69 at yahoo.com] 
Sent: Monday, June 26, 2006 11:16 AM
To: Voll, Scott; Carter, Bill; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] CallManager DR scenario

Correct SUBs are read only and the SUB pull down thier
subscription from the PUB, there is no replication if
the PUB is gone. If you require the PUB at the HQ site
then the only alternative that I see if HQ goes away
is to have a cold standby MCS at the DR site and
perform a BARs recovery onto the the NEW PUB and or
rotate a single mirrored drive out to the DR site.

--- "Voll, Scott" <Scott.Voll at wesd.org> wrote:

> To my understanding you can not make changes to the
> Cluster without the
> Pub.  The sub's have a read only DB.
> 
> With that said.... all other questions are null and
> void.
> 
> Like you said, the question is where can you put the
> pub so it is always
> alive.
> 
> 
> Scott
> 
> 
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On
> Behalf Of Carter, Bill
> Sent: Monday, June 26, 2006 10:56 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] CallManager DR scenario
> 
>  
> I am implementing a CallManager cluster with servers
> located at both HQ
> and a DR site.  The Publisher will be located at HQ,
> with 2 subscribers
> at HQ and the 2 subscribers at the DR site.  
> 
> If HQ is offline for an extended period of time
> (building blows up), the
> publisher will not be available.  In this situation,
> CallManager
> configuration changes will probably have to be made,
> but the publisher
> will be down.  
> 
> * Can changes be made to the system without an
> active publisher?
> 
> * I know subscriber won't replicated database to
> other subscribers.
> What happens when the publisher comes back online? 
> Are changes
> replicated from Subscriber to Publisher?
> 
> * With 2 subscribers located at the DR site, will I
> have to make
> configuration on both subscriber CallManagers (see
> previous question)? 
> 
> * In a period of extended outage, I assume it would
> be best to restore
> the Publisher to one of the Subscribers at DR,
> correct?
> 
> It seems like a Catch-22 for CallManager DR design. 
> Do you locate the
> Publisher at HQ or DR?  I guess it depends on which
> site will go
> down?!?!?  HaHaHa!!
> 
> 
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