Configure same server with different port on ARR

See more:

application

routing

request

I have 2 App servers where I have hosted two websites. both applications are running on different port.
Now I want to configure ARR server which will route request to these two APP servers. How can I configure APP servers on ARR with different Port in same server Farm ?

For example :
AppServer1 has two websites Test1 with port 8080 and Test1 with port 80
AppServer2 has two websites Test1 with port 8080 and Test1 with port 80

ARRServer will route request to server AppServer1 or AppServe2. So here I have configured port 8080 which will successfully route request to Test1 either through AppServer1 or AppServer2 but how can I route request to Test2 which is running on port 80?

What I have tried:

This scenario is new to me. I have tried adding same server in same serverfarm with different IP but it is not allowing to add same server.