Thanks so much for your response. I do understand that my antenna's aren't Aruba antennas and the official answer..
I think perhaps I am misunderstanding something about the IAP-175s and MIMO concepts in general. Like I said I'm very new to this and am sort of learning as I go. For Site 1 and Site 4 what I have is the following:
R0 - Attached to the 5ghz of my 90 degree sector
R0-1 - Attached to my 5ghz Omni
R1 - Attached to the 2.4ghz of my 90 degree sector
R1-1 - Attached to my 2.4ghz Omni
For Site 2 and 3 I have the following:
R0 - Attached to the 5ghz of my 90 degree sector
R0 - 1 - Attached to the 5ghz of the other 90 degree sector
R1 & R1-1 Attached to the 2.4 ghz of the 90 degee sectors respectively.
All of my antennas are vertically polarized. Are you saying that in order to create a proper connection I will need both vertical and horizontal polarization?
Note, that until I upgraded my firmware today The connection between #1 and #2 was working fine and had been for weeks. It is only since I upgraded the firmware that suddenly #2 can't mesh with #1 anymore. I haven't successfully setup a mesh at all to #3. What could be causing my mesh between #1 & #2 to fail after a software upgrade? I can confirm that both are running the same version of ArubaOS (6.2.1.0-3.3.0.0_38115)
John