For 802.11n you need to use open authentication or WPA2/AES. Also your channel width in the 5ghz has to be set to 40mhz to achieve up to 300mbps. With default of 20mhz channel width you can have up to 144mbps. WMM has to be enabled also. Here is a doc to help you.
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
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...