@vm7user , RDT uses TCP protocol for data-transmission between nodes (port 2233) and UDP for cluster membership (port 12321 in modern versions). As this is a proprietary protocol you aren't going to find the specification details on external-facing pages, if you have internal-VMware access these are relatively easily found. If you are working for a 3rd-party developer that wants/needs to understand how this works then likely avenue is contacting SDK support teams to see what information they can provide.