topic Re: 1142n data rates - possible bug in Wireless

1142n data rates - possible bug

akisbouza — Sun, 04 Jul 2021 03:01:57 GMT

I am having a 5508 WLC with some1142n LAPs. The problem is that wireless clients connect to the 802.11N 5Ghz however something is wrong with the data rates.

When i do show controllers dot11radio 1 in the AP i get

Active Rates: basic-12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
Current Rates: basic-12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
Allowed Rates: 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0

The allowed rates do not include the active rates.

I read that there is bug CSCti89945 but i am not the case as the controller came already with 7.0.98 version. I did not upgrade.

I have checked that i am using a WLAN with only WPA2 and AES, i enabled WWM and i ve already enabled 802.11n support.

I tested with an Ipad showing that the client connects with data rate m7.That means according to this http://en.wikipedia.org/wiki/IEEE_802.11n-2009

135-150 Mbps?

Thank you

Re: 1142n data rates - possible bug

josuvarg — Fri, 01 Apr 2011 14:27:44 GMT

MCS 7 is 72mbps at 20Mhz... If you want to get higher rates, like the 135mbps you said, you should use channel bonding (40mhz width)

Re: 1142n data rates - possible bug

akisbouza — Fri, 01 Apr 2011 14:40:55 GMT

I have already configured channel bonding however in the DCA Channel list i only see these channels 36, 40, 44, 48, 52, 56, 60, 64

When i enable Extended UNII-2 channels i see 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140

Is that correct for channel bonding?

Re: 1142n data rates - possible bug

Leo Laohoo — Sat, 02 Apr 2011 02:23:32 GMT

Depending on what your wireless NIC card:

1. The so-called 300 mbps "N" rate is expressed in HALF duplex. Halve the value and you get 150 mbps.

2. Some wireless NIC cards doesn't really support 300 mbps.