This is going to sound pretty general at first, but is there any way to do active/active balancing between two datacenters using Cisco CSS's?
let me explain that a bit further.
In my case, I'm not necessarily interested in having clients load-balanced between two datacenters as a whole, but more like having members of a load-balanced service group being located in two different datacenters.
For example, I have two Datacenters, DC1 an DC2, each with a public IP for a certain TCP application. The public IP's are the front end addresses for a load-balanced cluster of application servers. In the past, we've had it so that each datacenter was completely seperate -- each public IP went to a group of servers within that datacenter. I want to change it though so that each public IP is the front end for a load-balanced group of servers that are located in both datacenters. Currently, each datacenter is it's own /24 subnet.
I do realize that it might not be possible to adapt the existing infrastructure to support inter-datacenter load-balancing, in that case, can anybody point me in the right direction to build a new infrastructure that can support that?
Thanks Gilles. Just to clarify, your saying I need to NAT the incoming client connections to something unique per datacenter, right? So, for example, incoming connections in DC1 will be NAT'd to 10.250.0.0/16, and incoming connections in DC2 will be NAT'd to 10.240.0.0/16. Then I configure routing back through the CSS for those ranges?
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