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Number of clients associated per wlan is displayed wrong - WLC

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Rising star

While working on wireless LAN controller, sometimes we noticed something strange. The WLAN summary display on wireless LAN controller showed no clients associated to this WLC .

So in order to check further if we open the client page and we can find approximate 90 clients on WLC.

 

wlc.bug.monitor.display.jpg

Now it was important to verify this buggy behavior so when we look at another controller, the WLAN Summary Display showed more than 31600 clients. Indeed that was also not the actual numbers. Their is a reported bug for this issue:-

CSCth52309 -  Number of clients associated per wlan is displayed wrong

Since this is an internal Bug and visible to employees only, some of the details are:

first found in 7.0(171.4) . As per the external bug tool this is fixed in:

Known Fixed Releases:
7.0(114.51)
7.0(116.0)
7.2(1.3)
7.2(0.1)
7.2(1.9)

I researched further to gather more information and found one discussion within development team regarding this unexpected behavior happened :-

Detail
Number of clients associated per wlan is displayed wrong in the WCS->Monitor->Controller->WLAN.
Condition
If we have sequence of WLAN, i.e 1, 2,3 & 4 and if we associate a client to '4' it is displayed correctly.
If we miss any WLAN in between it is not displaying correctly.
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