Hi 
I need a help about designing the topology below.
 
the customer has HQ and now wanna design disaster center. As you can guess both 
HQ and Disaster side have server farms. (Actv.Dir. - Exc. - some applıcation 
servers)
also there are  about 50 remote sides. its an mpls topology.
 
case  : if  HQ connection to ISP goes down then the server farm in HQ will be 
unreachable and the remote sides will access to disaster side. its ok
but if only one server goes down in HQ , what kind of config should I do on the 
HQ router so the connections come to that server will be rerouted to the backup 
server in disaster side. 
 
and also I thougt giving same ip subnet for HQ and disaster and also I thought 
using overlapping nat to access both side to eachtoher.  Is it correct design ?
 
thnkx evry1


      
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