So the workaround is to remove the spanning tree protocol from lan bridge interface on microtik side? Tap interface in my case is bridged with a lan multiport bridge.
This is my Bridge Inteface attached
It seems RouterOS 7.14.3 fixes the problem more-or-less.
What’s new in 7.14.3 (2024-Apr-17 15:47):
[…]
*) bridge - use default “edge=auto” for dynamically bridged interfaces (PPP, VPLS, WDS);
[…]
For dynamically bridged interfaces (including OpenVPN TAP connections) RouterOS adds them to the bridge with edge=auto parameter. In 7.14.2 it was edge=no. I turned back RSTP on the bridge and realized the connection still works. It also works with legacy STP, but needs about 40-50 seconds to initialize after establishing OpenVPN connection.
Hi, pellerb,
It should still function even if STP is enabled, but remember that STP operates much slower than RSTP. Wait for at least a minute and observe if there’s any noticeable change.