If you have 2 APs while clients with low signal have same issue with both of them it would possibly be more a client issue to show a low signal because:
- There are other laptops that work fine and show high signal on same SSID (right?). this means the signal is OK.
- Not all laptops experience the low signal problem, only few of them. (right?)
The reason behind why some laptops show low siganl while others work fine is because they use different WLAN cards. Different WLAN cards differs in their signal sensitivity and noise/interference threshold they can bear. If you have some noise in your RF clients would possibly behave differently depending on their WLAN adapter's vendor. Some may bear a level of noise while others may get disconnected at same level. (this is just an example).
In order to continue with your situation I would suggest a couple of things to be done:
- Made a site survey (you can do a quick one) just to isolate that your RF is good for wireless connectivity. Try to use channels that do not overlap with your neighbors. (I usually use a simple tool called "inSSIDer" to view my APs and neighbor APs and see if we are operating on same channel or different channels. you can google and download it. it is free).
- Make sure that DCA is enabled. This is under Wirelss -> 802.11b/g/n -> RRM -> DCA, from WLC GUI. Make sure that Channel assignment method is set to "automatic" and the DCA channel list have channels 1, 6 and 11 listed.
- Upgrade to 6.0.220.0. This is a more stable version than the one you are using.
HTH
Amjad
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