Hi Guys, so i have a ticket open with support but thought i would ask here for anyone who has experienced a similar issue:
I have recently installed a SZ100 (first one) which is sat in a DC and have remote AP's from multiple sites connected to it over MPLS. The issue that I am seeing is that i have auto channel set (background scanning) and 99% of the AP's installed choose a UNII-2e channel rather than a UNII-1 or even UNII-2. I have a mix of clients and am concerned that not all will support DFS channels but i dont want to limit my deployment to 4 channels. For example; one site has 21 AP's, 20 of them have a UNII-2e channel and only 1 has selected CH36. I have done an Ekahau walk and there is virtually no 5GHz noise so this must be a software 'feature'. Same at other site too with a couple of AP's.
If i change an AP group to UNII-1 then all AP's choose a UNII-1 channel and operate without issue.
So my concern is that there is an issue with software that means AP's will prefer UNII-2e channels before any other.
There is no known issue. Many APs will begin operation on channel 149 (by default), and change channels if interference thresholds are met. Note: If your APs are not close enough to interfere with each other, they may select the same (usually default) channel, and this does not indicate a problem.
Thanks Michael, AP's begining operation at Ch 149 seems very strange to me and I can say its not something I have experienced on the ZD platform.
Based on the fact that UNII-1 channels are the 'mandatory' channels for 5GHz operation I would have thought all 5GHz radios would have a desire to accommodate these channels in a quite environment before any other.