> On Sep 10, 2017, at 11:33 AM, J Martin Rushton <martinrushton56 at btinternet.com> wrote: > > # mcastport: 5405 Does tcpdump see this traffic leaving each VM? Yes then the app is working. Does tcpdump see this traffic making it to each VM? Yes then the switching is working. Is the port opened in firewall/iptables? Yes then shrug.