Virtual Server monitor related to other Virtual Servers

Hi,

 

I have special requirement from our customer.

 

Imagine three BigIP clusters (11.4 HFA5). One of them (Master/Global) is distributing traffic (50/50) to two of them (Slaves/Local), so Global cluster have in pool VirtualServers sitting on Local clusters.

 

Lets say that Global cluster have VS in range 1.1.1.0/24, first Local-A have 2.2.2.0/24 and second Local-B have 3.3.3.0/24

 

Now on all BigIP's have about 100 VirtualServers.

 

Customer wants to make VS relation in way, that some defined Local VS will be marked as critical and if any of them goes down whole BigIP cluster will be marked as down and traffic will not be forwarded to this BigIP.

 

So customer might say:

 

Mark ask critical on Local-A 2.2.2.10, 2.2.2.20 and 2.2.2.30 and on Local-B 3.3.3.10, 3.3.3.20, 3.3.3.30

 

If any of this VS will go down (2.2.2.20 for example), then stop forwarding traffic to whole Local-A cluster.

 

Do you have any idea how to solve this easily and smart? I would like to avoid assigning iRules to all VS.

 

Thank you very much!