5Ghz - Multiple country codes - UNII-II

Answered Question
Aug 16th, 2012
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Hello People,


I have one question about multiple countries.


Actually i'm using one controller with BR configuration but i was searching about channels used in Brazil in theis frequency i can use more channels than controller show me today and it is important to me.


When i use just BR configuration in the WLC i can set in the DCA the channels below :


56, 60, 64, 149, 153, 157, 161,165 without UNII-II and with UNII-II i can use many others channels.


Is recommend to use UNII-II or not ? Because i was reading about it and the controller use the DFS for these frequencies and change channels many times.


Frequencies in Brazil http://en.wikipedia.org/wiki/List_of_WLAN_channels#5.C2.A0GHz_.28802.11a.2Fh.2Fj.2Fn.29.5B13.5D


I tried to use multiple countries in the WLC with BR and US and the channels opened were :


36,40,44,48,52,56, 60, 64, 149, 153, 157, 161,165


Can someone help me with these questions ?







Correct Answer by George Stefanick about 4 years 11 months ago

If DFS is in your regulator domain, I would recommend not using those channel .. Even if you aren't close to an airport DFS can still be seen from other government and weather reporting agency's. DFS is a algorithm in of itself. It includes channel announcements and channel moves and could and very likly will disrupt VoWiFi communications. If you want to contend with DFS  and use those channel, I might recommend reading up on DFS, as a standard and how it works  and how Cisco works with it specifically. So you can better educate yourself incase you get voice complaints.


I would avoid it ...


I hope that helps ..

Correct Answer by George Stefanick about 4 years 11 months ago

Maybe -- Performance wise, if your clients are in domain BR they may only scan those channels and respect those power requirements. Also,understand you could be exceeding that domains regulatory laws.

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George Stefanick about 4 years 11 months ago

Keep in mind your controller doesnt "control" the channels you can have. Rather the access point does, If you get a US ap, you get only US channel. If you get a GB ap, you get only GB channels.

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George Stefanick Thu, 08/16/2012 - 13:18
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Keep in mind your controller doesnt "control" the channels you can have. Rather the access point does, If you get a US ap, you get only US channel. If you get a GB ap, you get only GB channels.

Amjad Abdullah Fri, 08/17/2012 - 07:52
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What is the model of your APs?

Adding a channel to the WLC is not enough. You have to go to the AP config and set the country from the list. The list lists the countries that you configured on the WLC.


HTH


Amjad


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Wellington L Fri, 08/17/2012 - 07:57
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My APs are using country code BR equal Controllers.

The models are


AIR-LAP1041N-A-K9

AIR-LAP1142N-A-K9

AIR-LAP1042N-A-K9


Thanks.

George Stefanick Fri, 08/17/2012 - 08:01
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The "A" is for North America. Those APs will only support North America channels.

Wellington L Fri, 08/17/2012 - 08:04
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Yes,I know it, but i need to know if i put multiple countries in the controller configuration with BR and US, i will have problems.

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George Stefanick Fri, 08/17/2012 - 08:18
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Maybe -- Performance wise, if your clients are in domain BR they may only scan those channels and respect those power requirements. Also,understand you could be exceeding that domains regulatory laws.

Wellington L Fri, 08/17/2012 - 10:12
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Ok. Thanks.


I will maintain in BR country code.


Is recommend to enable UNII-II for VoWLAN ?


Thanks.

Correct Answer
George Stefanick Fri, 08/17/2012 - 10:21
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If DFS is in your regulator domain, I would recommend not using those channel .. Even if you aren't close to an airport DFS can still be seen from other government and weather reporting agency's. DFS is a algorithm in of itself. It includes channel announcements and channel moves and could and very likly will disrupt VoWiFi communications. If you want to contend with DFS  and use those channel, I might recommend reading up on DFS, as a standard and how it works  and how Cisco works with it specifically. So you can better educate yourself incase you get voice complaints.


I would avoid it ...


I hope that helps ..

George Stefanick Fri, 08/17/2012 - 10:26
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If you do choose to use those channels you will get alarms notifying you that DFS has just occurred and that the access point are moving channels

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