We are pushing traffic using a packet generator on a client at a rate of 10Mbit/s via a Cisco AP C9120AXI-E.
Using the following command we can fetch the BSSID counters form the WLC9800.
show wireless stats ap name AP8C1E.8025.7D7C dot11 5ghz slot 1 wlan-id 5 statistics
In one test, we run the packet generator for 164 seconds, so all in all we pushed 164*10Mbit/8 = 205Mbytes
>>> 164*10*10**6/(8*10**6)
205.0
At the same time, we monitor the “RX Statistics” field “Data Bytes”.
Before:
851179521
After:
867610603
>>> (867610603 - 851179521)/(10**6)
16.431082
They show only 16.4Mbyte!!
We have also tested over a long time to get rid of any ramping/filtering effects, but each test gives different results, and they are always much lower than the true traffic volumes.
As a sidenote we have tested other counters that counts number of packets over time, and they match the number of packets from the packet generator.
Anyone having experience with the BSSID counters? If we can get this up and running, they seem like the perfect data source for checking RF performance.
Thanks, Anders
