[cisco-voip] CallManager DR scenario

[Carter, Bill]

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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