What Flow Control settings are most people using? Also, do you allow autonegotiation or lock the speed?
I have installed a B5c test link at 5 miles between two skyscraper rooftops. One side has no Ethernet flapping at all, the other side flaps repeatedly despite doing all of the things people and Mimosa in the forum have discussed, except for trying a Netonix. So I bought a Netonix WS-12-250-AC to give it a try. The flapping dropped to about once every few hours from every few minutes.