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Disabling low data rates for high density environments:
Get the "show run-config" output from the WLCs and load them into WLC Config Analyzer. In the per-controller RF Summary output, look at the client RSSI distribution for 2.4GHz. You'll see something like this:
Client RSSI Distribution 2.4 Band: Number of Clients with RSSI -92:5 Number of Clients with RSSI -84:12 Number of Clients with RSSI -76:40 Number of Clients with RSSI -68:79 Number of Clients with RSSI -60:118 Number of Clients with RSSI -52:107
If you have very few clients that are down in the lower RSSI buckets, then you're probably OK to disable the lower rates. If you have lots of clients that are in the -84 dBm bucket - then you probably shouldn't.
In Device data\access points\RF Summary.
Aps with the highest channel utilization, this can help on isolating areas that may need changes (more density or lower density of Aps, it depends), or areas that may hear too much "bleeding" from other Aps
A high utilization on a "idle " network, without any users, may be indicative that just normal beaconing is eating too much RF time. For example,with zero clients, that had around 10 Aps, with channel utilization > 37%.... that means a probably over dense deployment, TPC adjustments or turning off radios may be needed
RF index value, this may isolate problematic Aps. Be careful, there is no magic number to say what is good or bad. A network with lots of Aps > 2000 is a very busy network, but with real traffic, it will never be zero. Example: if I see that most Aps are around 8000 to 1000, but I see 5 Aps on 3000 or similar, that is the first spot to look at
"AP that see me" count. That is TX neighbor count in RRM wording. That are Aps that can receive my traffic. A very high count is indicative of Aps that bleed signal over large area, typical on elevators, open atriums, etc... this may be a good candidate to review positioning or antenna type
In RF Analysis, RF groups.
This is a prediction on how RF group neighborhoods would form. This is critical information as it is the building block that TPC and DCA work (power and channels calculations are related across Aps that belong to same group) If you have too many isolated Aps, that are physically on same building, it may point to low density environment, and poor roaming, as Aps are too far to each other.
Normally, a building with VoIP services should be a single big group for example.
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