I have two 350 bridges running approx 2/3 miles with 21dbi yagi antennas. The uplink is continuously dropping with no pattern showing. The 350's are running the latest version of code. Tried with and without encryption, tried with the beacon rate at 2000 and also tried with variors options with regards to 'role in radio network'. No change what so ever. Both 350's are competely fine and work when using the small antennas in a back to back senario. This would suggest the cable of the yagi or the yagi itself could be damaged but this has been checked and verified ok.
1 change the data rate settings for 5.5 and 11.0 to yes.
2 check the transmission power.
3 make a link test carrier should not be < 60%.
4 Try changing the channel.
5 Downgrade to 11.23 (best of all ).
reset the device to factory defaults, this is bcoz when upgraded from 11.0 series firmware to 12.0 the device configuration tends to get corrupt in certain cases, hence resetting to default at both ends will resolve the same.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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