Multi-cluster with replicated control plane

How to install an Istio multi-cluster deployment with replicated control plane instances in every cluster but not using gateways to connect services across clusters?

in my case , multi-cluster in single network.

I know there is some on-going work in this space. You might start with . The scenario is being laid out with some clusters sharing a network and some across networks. Any feedback on your scenario to the team would be welcome.