active/active LTM deployment on different subnet

Hi Nitaas,

i am stucked with the same scenario as you were in that time. Only difference is that we have Seperate load Balancer pair for Second DC.

Clients has some sites on DC-1 and some applications hosted on DC-2. We can say this as Active-Active Data Center (in LB prospects). For GTM - We decided to play with Listener IPs (on both data center) on Public DNS for CNAME entry. for Eg:

Listener IP DC-1 : 10.10.10.1

Listener IP DC-2 : 10.20.20.1

Application -1 : www.xyz.com (at DC-2)

Application-2 : www.123.com (at DC-1)

We'll do that CNAME entry/Delegation record entry on Public DNS with both DCs listener IPs for both the applications.

i.e. www.xyz.com 10.10.10.1

10.20.20.1

www.123.com 10.10.10.1

10.20.20.1

and Set the member order/ratio on for each application at respective DCs accordingly in GSLB wide IPs members.

-> 0 for application-1 at DC-2

-> 0 for application-2 at DC-1

Assuming Public DNS is performing Round Robin load balancing only.

highlighting the important point : VIP IP pool and Server IP pool would be different at these data centers. 

Could you please help us to about the approach you adapted or Else pls sugget for other effective solution.