Cisco Prime is showing diffrent power lvls but the same power output?

[JuliusRosen0990]

Hello!

I ran in to a wierd thing when i was lookin' thru some APs today and noticed 2 APs showing diffrent power lvl assignments but they are showing the same TxPower is that even possible? Can someone explain how this might happen?

Running : Prime Infrastructure 3.5 Device Pack 1 with PI 3.5 Update1

Is this a known bugg? I haven't found anything similar?

[JuliusRosen0990]

I'd like to add that you can redirect this to the appropriate forum if it's in the wrong place!
I didn't find any tags on Prime or Cisco Prime?

[patoberli]

Could be a bug, unless you use external antennas.

One more thing, depending on the channels you can have different output powers. Assuming you're from the FCC regulated world, check this:

https://en.wikipedia.org/wiki/U-NII

[JuliusRosen0990]

ch. 64 : U-NII Mid (U-NII-2A[3]): 5.250–5.350 GHz. Both outdoor and indoor use, subject to Dynamic Frequency Selection (DFS, or radar avoidance). Regulations allow for a user-installable antenna. Power limited to 250 mW.

ch. 116 : U-NII Worldwide (U-NII-2C / U-NII-2e): 5.470–5.725 GHz. Both outdoor and indoor use, subject to Dynamic Frequency Selection (DFS, or radar avoidance). Power limited to 250 mW.

As I see this both bands are limited to 250mW so that shouldn't be a problem?

And we're using 2802i wich has internal antennas so that can't be it either?

[patoberli]

No, in that case I suspect some software bug.

[Scott Fella]

>From the cli of the controller, look at the output from the show advanced 802.11a txpower. For the output, you can look at the power level and the dbm level. Certain channels in different regulatory domains have certain max power levels and that can be confusing when you look at the ap power level.

[JuliusRosen0990]

I don't understand what you're getting at here? To me they both look like they have the same restrictions?

U-NII Mid / U-NII-2A 5.250–5.350 GHz 100 MHz 250 mW   1 W
ch. 64 : U-NII Mid (U-NII-2A[3]): 5.250–5.350 GHz. Both outdoor and indoor use, subject to Dynamic Frequency Selection (DFS, or radar avoidance). Regulations allow for a user-installable antenna. Power limited to 250 mW.

U-NII Worldwide / U-NII-2C / U-NII-2-Extended / U-NII-2e 5.470–5.725 GHz 255 MHz 250 mW   1 W
ch. 116 : U-NII Worldwide (U-NII-2C / U-NII-2e): 5.470–5.725 GHz. Both outdoor and indoor use, subject to Dynamic Frequency Selection (DFS, or radar avoidance). Power limited to 250 mW.

[Scott Fella]

Post the following: show advanced 802.11a txpower

[JuliusRosen0990]

Can you pipe that sh req somehow?

I've tried "| i XXXX" but that didn't seem to work?

[JuliusRosen0990]

Hey hey!

I figured it out so could you take a look? To me theese look the same exept for the TX Power Lvls, Ch. & the nr of TX power lvl steps? But they should have the same restrictions no?

Number Of Channels ........................ 0
Tx Power
Tx Power Level 1 .......................... 23 dBm
Tx Power Level 2 .......................... 20 dBm
Tx Power Level 3 .......................... 17 dBm
Tx Power Level 4 .......................... 14 dBm
Tx Power Level 5 .......................... 11 dBm
Tx Power Level 6 .......................... 8 dBm
Tx Power Level 7 .......................... 5 dBm
Tx Power Level 8 .......................... 2 dBm
Tx Power Configuration .................... AUTOMATIC
Current Tx Power Level .................... 1
Tx Power Assigned By ...................... DTPC
Current Channel ........................... 116
Channel Assigned By ....................... DCA
Extension Channel ......................... NONE
Channel Width.............................. 20 Mhz
Allowed Channel List....................... 36,40,44,48,52,56,60,64,100,
DCA Channel List........................... Global
Internal Antenna Gain (in .5 dBi units).... 10

&

Number Of Channels ........................ 0
Tx Power
Tx Power Level 1 .......................... 17 dBm
Tx Power Level 2 .......................... 14 dBm
Tx Power Level 3 .......................... 11 dBm
Tx Power Level 4 .......................... 8 dBm
Tx Power Level 5 .......................... 5 dBm
Tx Power Level 6 .......................... 2 dBm
Tx Power Configuration .................... AUTOMATIC
Current Tx Power Level .................... 1
Tx Power Assigned By ...................... DTPC
Current Channel ........................... 64
Channel Assigned By ....................... DCA
Extension Channel ......................... NONE
Channel Width.............................. 20 Mhz
Allowed Channel List....................... 36,40,44,48,52,56,60,64,100,
DCA Channel List........................... Global
Internal Antenna Gain (in .5 dBi units).... 10