F5 DNS and F5 LTM

Hello,

 

We have one F5 DNS and 2 x F5 LTM

 

Here is the architecture:

 

4 sites. On each sites 8 servers providing http access to an application

 

On each LTM there are 2 virtual pools each with the 8 http servers Testing ping and a specific error code.

 

At the F5 DNS level a round robin mechanism is configured to load balance the traffic between the 4 sites.

 

Everything is working fine when all the sites are online using the F5 DNS VIP.

 

However when doing failure testing:

 

1. i.e: Stoping the 8 http servers on a site

--> The trafic is randomly sent to the virtual pool containing the offline http servers which display an error as the servers are offline.

 

Is there a way to ensure the trafic is not redirected when the member of a virtual pool in a LTP are offline?

 

Is it because we are using round robin?

 

Thanks for your help.