Actually it is not authentication. Time to time users complain the slowness of the Wifi network. So when we do the ICMP test to WLC from wireless device(Laptop) it varied around 1ms to 4ms. Sometimes it goes to more than 100ms.
Delay would depend on many factors, such as: wireless bandwidth rate, wireless congestion, wired congestion (between LWAP and WLC) and wired distance latency between LWAP and WLC.
I would look into your wireless environment first. Also forgot to mention, with wireless, delay could also be caused by issues in the RF environment too.
Wireless is a subject in itself. There's many potential issues that can slow it down, unique to it. Remember it's shared bandwidth, like Ethernet hubs. (I.e. more clients or busy clients will often "slow" wireless.) Interference in the RF environment will slow clients. (NB: anything that generate RF in the same frequency can cause issues. For example, possibly someone using a microwave in a break room.) Third, different slower "speed" clients may slow faster "speed" clients. (I.e. a wireless device that only supports an older wireless standard can slow devices using newer wireless standards.)
There is no correct map for it. It depends on many factors but the main is your network optimization and wireless configuration, Wireless bandwidth rate, Wireless congestion, Wired congestion and Wired Switching latency.
Regards,
Deepak Kumar
Regards, Deepak Kumar, Don't forget to vote and accept the solution if this comment will help you!
As the other said already there are many factors in the delay of you wireless client. Most likely congestion or interference. Take a look at the Cisco Cleanair and the air quality reports if enabled.
You can measure the CAPWAP link latency by enabling link latancy under the advanced tab of the AP on the WLC. This will tell you the wired latency of the capwap tunnel from AP to controller.
