Comment 3 for bug 2007304

Thank you a lot for your detailed investigation!

What's the worst case that could happen when we go for option (1)? Will enabling of STP break existing bridges that don't use STP, or will it just be ignored in the setup?

IMO we should probably go for option 2, as this should break the least setups while still leaving us with consistent behavior across different backends. In addition, we should update the documentation to mention STP is only being activated when any bridge parameters are given.