we are facing issues with an ap mounted 15m high in ceiling in one of the warehouse. Model is 2700 E and checked the power level of both 2.4 and 5G, both are at high power since there are no near by aps. But still we are getting signal only from 5G but not 2G. Few scanners only support 2.4G and facing issues. Data rates are 1, 2, 5.5 disabled on 2.4G and rest enabled.
connect SSH or Telnet to WLC,
what's output for:
show ap config 802.11b <Name of AP>
What is the model of AP ?
What is the model of WLC?
Also you can check with Wireless Analyze Tool (for Example inSSIDer or any other free for Android/IOS) see you RSSI level from this AP, under this AP or not, before test, remember Radio MAC Address of 2.4G of this AP and look it in Tool in the place under AP.