I upgraded my C2600 from 18.x to 19.07.4 yesterday, and I just noticed that my 5ghz AC actual measured speedtested throughput is quite a bit worse than it had been previously. I kept my configuration the same. Can anyone suggest how I might go about troubleshooting this or offer some tips?
EDIT: watching my device in overview, I notice it cycling from this:
to faster speeds/width and then back. I think this is actually normal, but .. just in case.
OK so in desperation, I recreated the main SSID, and performance was good!
That led me to test the alternate SSID's which were also fine.
I went through the various settings until I found the culprit. Having WMM off on SSID main (and on for guest/etc SSID's) drastically reduced my throughput suddenly.
I don't suppose anyone has any insight on why that would be the case? Is it because of the mismatch?