I have around 20 1142Ns registered to 4402 WLC. WLC was saying:
802.11a/n Radios 20
802.11b/g/n Radios 19
So I compared and found the AP which had only 802.11a/n Radio. SSH-d to the AP and sh ver:
1 Gigabit Ethernet interface
1 802.11 Radio(s)
and if I try to configure the radio interface:
apname(config)#interface dot11Radio ?
<0-1> Dot11Radio interface number
apname(config)#interface dot11Radio 0?
. : <0-1>
apname(config)#interface dot11Radio 0 ?
% Unrecognized command
apnameconfig)#interface dot11Radio 1 ?
So as you can see dot11Radio 0 is gone. I've tried rebooting the AP with no success. I'm thinking there is a hardware failure with the radio antenna.
Has anyone experienced this kind of problem? What could be the cause?