Band Preference Steering


Userlevel 6
Hello, all!

Have some problem:

C35 controller, 3805 AP's.
Clients - iPad, iPhone, Android.
11a capable clients is rejected from 11b/g, but not connecting to 11a.

NetSight - Alarms and events - Wireless - EWC[192.168.XX.XXX]: AP Serial Number 15100sssssssssss: 02/29/16 11:29:48: Assoc Req is rejected on radio b/g for the 11a capable client E4:8B:7F:YY:YY:YY due to Band Preference Steering.

Any ideas?

Thank you!

16 replies

Userlevel 7
I run the setup in my lab pretty consistently with a wall of 25 iPads. I haven't seen any issues, it's been working fine. I would suggest opening a ticket with GTAC
Userlevel 6
Am I doing right?

Make Radio Preference Group, add all Radios and my WLAN.
Enable Band Preference.

That's all for Band Preference Steering.
Right?

Thank you!
Userlevel 7
Alexandr P wrote:

Am I doing right?

Make Radio Preference Group, add all Radios and my WLAN.
Enable Band Preference.

That's all for Band Preference Steering.
Right?

Thank you!

Yes... https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-set-up-a-Band-Preference-Group-Band...
Userlevel 7
Alexandr P wrote:

Am I doing right?

Make Radio Preference Group, add all Radios and my WLAN.
Enable Band Preference.

That's all for Band Preference Steering.
Right?

Thank you!

To know if it's working you will see a clients with the following Protocol State:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?
Userlevel 6
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

Right - it's non-DFS channels.
Userlevel 7
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

Pretty much all current Apple Products support the DFS Channels...
Userlevel 6
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

So, we have to choose "All channels" in Channel Plan -> AP settings?

Thank you!
Userlevel 7
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

As long as your devices support it. There are droids that will not attach to the DFS Channels like some of the Nexus family, so they would more likely connect to the 2.4 side if there was no 5GHz service available.
Userlevel 6
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

There is open SSID (without auth)

Thank you!
Userlevel 4
Jeremy Gibbs wrote:

I'm assuming your using a non DFS channel that an iPhone / android could most definitely connect to, correct?

In the 2.4 GHZ I do not see a problem with that. As far as DFS vs NON-DFS channels, I would check to see how far you are from any type of Government agencies (EMS, FIRE Dept, and Police department) or Air port before enabling NON-DEFS channels.

There are FCC Guidelines that prohibit the use of these channels as It can interfere with their communications.
Userlevel 4
An issue that I have noticed in the past is if in your VNS > WLAN > Privacy if the WPA.2 is not set to AES only, iDevices have had an issue connecting. If you are running WPA.1 I have had to change it to auto.

Lastly, I would also check to see if you have severe channel overlap as iDevices do not work well with that.

Hope all of our info helps you get to a resolution. Let us know 🙂
Userlevel 6
SSID is open, channels change to All channels, but situation is not changed.
Client is connectind to SSID, then message
02/29/16 15:02:14: Assoc Req is rejected on radio b/g for the 11a capable client E4:8B:7F:XX:XX:XX due to Band Preference Steering
and client can't connect to SSID.

Any ideas?

Thank you!
Userlevel 7
What does the client report show for that user?
Userlevel 4
If you were to disable the band pref, and let the iPad connect (a small test environment) does it connect to channel A or no?
Personally I have band steering off, and still see 75%+ on 5GHz with our fleet of iPads. iOS devices are pretty good at choosing 5GHz, let them decide.

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