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Sean Devo
Beginner

What is 802.11bn?

On my Cisco WLC 5500 series > Monitoring > Clients, I see a bunch of clients connected as 802.11g and 802.11bn.  I understand that 802.11g and 802.11b is 2.54Ghz band while 802.11n is 5.0Ghz, but what exactly does it mean when it tells me the client protocol for the device is 802.11bn? Does this mean the client can be either connected to 5.0Ghz or 2.54Ghz? I have not been able to find much documentation on "802.11bn." Thanks

 

Best Regards,

Sean

27 REPLIES 27

Hi Shaikh,

As Rasika already mentioned the WLC cannot force the enduser device to connect to an specific radio that is why he suggested Band Select but take a look on the following links. I am planning to do the same thing but testing first in the lab.

https://supportforums.cisco.com/discussion/11564261/apple-macbook-pro-dropping-wireless-connection

https://supportforums.cisco.com/document/109031/apple-macbook-pro-dropping-wireless-connection

Hello Dear Rasika

Kindly give as information about 80.1x how its implement in wireless network what problem we will face during the implementation if possible thanks for your always support 

Regards

Assad

Hi Assad,

Pls read below post for basic understanding what options available for 802.1X deployment in wireless. If you have any specific queries it is better to start a new thread as your query does not align the this tread.

http://mrncciew.com/2014/08/24/cwsp-eap-basics/

HTH

Rasika

*** Pls rate all useful responses ***

(Cisco Controller) >show advanced 802.11b txpower

Leader Automatic Transmit Power Assignment
Transmit Power Assignment Mode................. AUTO
Transmit Power Update Interval................. 600 sec
Transmit Power Threshold....................... -70 dBm
Transmit Power Neighbor Count.................. 3 APs
Min Transmit Power............................. -10 dBm
Max Transmit Power............................. 30 dBm
Update Contribution
Noise........................................ Enable
Interference................................. Enable
Load......................................... Disable
Device Aware................................. Disable
Transmit Power Assignment Leader............... ST-WLC
Last Run....................................... 219 sec
Last Run Time.................................. 0 secon
TPC Mode....................................... Version
TPCv2 Target RSSI.............................. -67 dBm
TPCv2 VoWLAN Guide RSSI........................ -67.0 d
TPCv2 SOP...................................... -85.0 d
TPCv2 Default Client Ant Gain.................. 0.0 d
TPCv2 Path Loss Decay Factor................... 3.6
TPCv2 Search Intensity......................... 10 Iter

--More-- or (q)uit

AP Name Channel TxPower Allowe d Power Levels
-------------------------------- ---------- ------------- ------ ------------------
ST-HO-1F-AP-1 *1 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]
ST-HO-1F-AP-2 *11 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]
ST-HO-1F-AP-3 *6 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]
ST-HO-2F-AP-1 *1 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]
ST-HO-5F-AP-2 *6 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]
ST-HO-5F-AP-1 *1 *1/7 (17 dBm) [17/14 /11/8/5/2/-1/0]

(Cisco Controller) >show advanced 802.11a txpower

Leader Automatic Transmit Power Assignment
Transmit Power Assignment Mode................. AUTO
Transmit Power Update Interval................. 600 seconds
Transmit Power Threshold....................... -70 dBm
Transmit Power Neighbor Count.................. 3 APs
Min Transmit Power............................. -10 dBm
Max Transmit Power............................. 30 dBm
Update Contribution
Noise........................................ Enable
Interference................................. Enable
Load......................................... Disable
Device Aware................................. Disable
Transmit Power Assignment Leader............... ST-WLC (172.16.17.50) (::)
Last Run....................................... 280 seconds ago
Last Run Time.................................. 0 seconds
TPC Mode....................................... Version 1
TPCv2 Target RSSI.............................. -67 dBm
TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm
TPCv2 SOP...................................... -85.0 dBm
TPCv2 Default Client Ant Gain.................. 0.0 dBi
TPCv2 Path Loss Decay Factor................... 3.6
TPCv2 Search Intensity......................... 10 Iterations

--More-- or (q)uit

AP Name Channel TxPower Allowed Power Levels
-------------------------------- ---------- ------------- ------------------------

I suspect your 802.11a network is disabled on your WLC. Pls check the below command output

show 802.11a

Regarding 2.4GHz, all AP operating it's highest power. If you still see the low RSSI, then I would check at what power level your site survey done.(if you see coverage issues in production)

HTH

Rasika

*** Pls rate all useful responses *** 

Hi Rasika,

This is Jeet, Hope you remember me we met at Cisco Live last month. Anyway I had a query regarding clients connecting on 802.11a even though the radio policy is set to 802.11b/g only on the WLC policy. Screenshots attached. I am currently running mix of 2800 and 3500 APs on WLC 5508 with software version 8.2.151.0

Thanks for all your support.

Regards,

Jeet

Hi Jeet,

I remember you :)

I think it is a software issue or may be AP model specific. Do you experience this on both model of APs ?

By the way, it is good to start a new thread for your issue

HTH

Rasika

Okay I have done that now.

https://supportforums.cisco.com/discussion/13285226/clients-connecting-different-radio-policy

Thanks for all your help.

Hi

My management asking me to configure only 5Ghz initially for a specific SSID. I checked ,now the Radio policy for SSID configured as "ALL" so as per my understanding, should I change it to 802.11a or any other steps to follow before doing this.

 

Please suggest me on this.

 

Regards,

 

Jagat

Hello Jagat, I hope you are doing great. Yes, you should configure the radio policy as 802.11a to only broadcast the SSID on 5GHz. 

Hi Rasika,

I have a high density environment and I am evaluating to implement band select because we have too many users connecting on 2.4Ghz to the same AP (not honoring code 17 from AP based on our load-balancing - we do not have voip on the wifi that is why I am using this feature by now).

However from the following link I see Scott Fella not recommending to use it. In fact, on my initial lab tests today using 2 IPADs + 2 Samsung TAB, I saw some unexpected disconnections from IPAD so that goes with the comment from Scott.

https://supportforums.cisco.com/discussion/11564261/apple-macbook-pro-dropping-wireless-connection

https://supportforums.cisco.com/document/109031/apple-macbook-pro-dropping-wireless-connection

I would like to know your impressions based on the implementations you have done. In any case, I am still doing more testing.

In addition to the previous, I am also evaluating what I got in the next link based on some strange behavior on my wifi network but this is a different subject not part of my question.

https://supportforums.cisco.com/discussion/11419641/lap-drops-client-connections

Important to mention that I am using WebAuth (CWA).

thanks

In most cases a proper design can solve these issues. I wouldn't get fancy with advance nerd knobs. Keep the config simple. Specific to your issues with to many clients on a single radio. You can influence this by adding anothe ap and power both down low. Or make sure your 5ghz is powered properly. 

"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
___________________________________________________________

Thanks George for your prompt response on this case. I will take a look on your suggestions regarding 5ghz power. Adding more AP is not feasible because we have limited budget. I also found the attached document that explain how to tweak band select timers so maybe that could help

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