Transmission power discrepancy - Radio profile and device level/ AP Template config

[systemscsn]

Hi all,

I have a device quite a way from an outdoor antenna, and so instead of leaving its transmission power to auto, inside the AP - Device Level - I clicked on manual and changed it to the max, which is 30.

Now this is an AP1130 with an attached antenna.  So at the device level I changed it from auto to manual and move the slider all the way to the right, maxing it out at 30dBm.  Its interface wifi0 whose radio profile is Radio_ng_ng0.

It didn't help - The device at used to connect and now doesn't, but forget about that issue - and then I had a thought about radio profiles, maybe that is overriding my setting and not taking my max'd out setting.  So I go into Configure >> Common >> Policy  >> Radio profiles, and click on the Radio_ng_ng0, and RIGHT THERE I see its max is 20 dBm.... WTHeck....

Yeah... seriously.... So there is a bit of a bug/discrepancy there.  Shows max as 30 when in the AP or at the device level, and something else for the radio profile. 

So I'm wondering what is the answer?  Which one is wrong? which one is right? and does one override the other, and if so how?

Any help is appreciated.

Jason.

[Christoph_S · Accepted solution]

Hello Jason,

The power setting on the AP (override) will take precedence but will not change the power value in the global radio profile which may be used by other APs. So that setting will only be on your AP and will not change on the global radio profile container. Whatever you change the power to, be it on the AP or in the global radio profile setting, the max power will be dictated by the regulatory specs for the country the AP will operate in, so even of you set the AP radio power to 30db, if regulations dictate 20db, this is what it will be set to. 

SSH into the AP and run the commands:

show int w0

show int w1

In there look at the EIRP value, this will tell you what power is used and where it's coming from. 

Hope this helps,

Chris

[systemscsn]

Thanks Chris, appreciated.

But on those devices where they have  "Using Device Level Config" Icon, it would and does make sense if the "actual" TX power was shown, and not the maxed out value set by the AP Template (or radio profile, whichever).  What you see is what it should be, kinda thing.

So the interface shows 20 (sometimes lower... dont ask me why), its set to 30 at the device level, and doing the SSH shows what it actually is, which is 28..

Here is the result of what you said to do: "Freq(Chan)=2462Mhz(11); EIRP power=28.00*dBm(23dBm + 5.00dBi + 0.00dBi); Diversi ty=enabled;"

For the average "set and forget" techs who have too much to do and not enough time to do it, the interface should accurately reflect everything, tx power included.  Im not saying Im one of those guys... as you know Chris, but I am a "what you see is what you get" kind of guy.

Is there any reason why this isnt the case?

Thanks again for helping, very useful info.

Best,

Jason.