reply to TheHox
Re: PTP link problem, 300ft with NanostationM2 IMHO: Bandwidth testing ON the device is never a fair measurement of the throughput OF that device... buffers, I/O and CPU all play a role, and when you're testing using the same device that you ARE testing it's pretty unlikely to be a true measurement. Use IPerf. It's easy to learn and easy to use.
With those numbers I'd expect at least 30 Mbps. 2.4 is ugly. I'd also try Hard Coding your Ethernet ports to 100/FD on all devices if you haven't already - that may help.