Redirect traffic based on tcp port

Typically, you would create virtual servers to handle this functionality. You can create a pool each for the ISP1 and IPS2 routers. You can then reference those pools in specific port virtual servers. To handle the remaining traffic not destined for a specific port virtual server, you can create a pool of both routers (each defined on port 0) and create a wildcard virtual server pointing to that pool.

 

 

You might be create an iRule to do all of this, but it's simpler to use virtual servers.

 

 

You can take a look at the LTM config guide for your version on AskF5 for details on configuring pools and virtual servers.

 

 

Aaron