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We just got a 1250 AP and are trying to configure 802.11n on it. We were using WPA(Enterprise) and TKIP and I got the message below:
Apr 8 14:24:12: %DOT11-4-NO_HT: Interface Dot11Radio0, Mcs rates disabled on vlan 132 due to not using AES encryption or encryption is not disabled
Users who connected got only speeds up to 54Mb/s.
I changed the ciphers to use AES-CCM instead of TKIP, the message went away and hosts were able to connect with 802.11n speeds.(m1.,m2.,etc)
The log message makes it seem like you have to use AES, is this the case or do I need to add something to the config?
Go to Solution.
802.11N standard doesn't support WPA-TKIP.... you have to use AES.... Most likey WPA2-AES....
I learned the hard way too.
Correct, 802.11n must be either secured with WPA2/AES OR Open to be able to get the N rates.
Thanks. Right now we are only evaluating 'n' but it is definitely good to know what exactly you can/can't do with it.
Can 802.11g & 802.11a clients still connected with WPA (enterprise) and TKIP on a 1250 AP?
Yes.... but when you try to enable 40mhz channel width, users will not be able to authenticate. You should start to migrate users to WPA2 if possible.