Load test issue

I have my servers on the DMZ (2 servers) and we are using Load Runner to generate the artificial load on the system.

 

 

We have the cookie persistence and the round robin selection for the nodes but somehow at the end all the 500 virtual users end up in the same server.

 

Maybe because we have one single source sending the infromation (the load generator)

 

 

All of them are coming from the same proxy in our internal network.

 

 

Is there any way to keep the cookie persistence and send the servers to each node that I have?

 

 

The ideal case will be that the first virtual user arrives and we load that user on node1 then the next one arrives and receives node2 and the next one node1 (you get the point)

 

 

If the user1 returns we already have a node for that user (node1)

 

User2 (node2)

 

User3 (node1)

 

…

 

 

Could you please provide an example?