I've found a couple of references on the documentation about this feature, often refered as TCP Multiplexing or TCP Offloading. But found no specific details on how it works or how to configure it.
Does anyone have further datails about this feature, if it is really avaiable on ACE or just in other systems like AVS ?
Yes it is available. It is called TCP Server Reuse on the ACE.
Have a look at following link.