There are a number of threads on the first and second page regarding this. Many of us have provided network data to show them exactly where the failure is. Worst part is 0 acknowledgement on it. Fine something is broken takes time to fix okay. But everyone that has provided real data that shows an issue gets no reply. The only people that get replies are the ones that they can push generic L1 auto responses off on. Please download WinMTR, grab your DC IP from arrstatus dot com and when you are having issues run the test against that ip for a few minutes and copy your results to this or any of the other threads =(.