Here is my possibly poorly written bugreport http://marc.info/?l=openbsd-bugs&m=142856496830537&w=2 I also have port 4789 udp open
I've since posting that discovered that if I give my client box a public IP it works flawlessly. The instant I flip it back to private functionality deteriorate's( unicast works but multicast completely fails ). Between flipping of networks I destroy and rebuild the vxlan and bridge on the server side and usually for good measure completely reboot the client. Any suggestions would be helpful Thanks
