Controller Based WLANs

How can I verify AP's dBm and history changing of dBm?

Introduction : For troublshooting purpose or check the AP's dBm in detail, need to verify "Conducted Power Set from configuration" and "external dBi which is provoided via AP installation process"

 

Environment : Controller : A3600, AP : AP105

 

Network Topology : Controller --- PoE switch ---- AP-105

 

Answer : Normally, checking the AP's dBm from "show ap active"

(controller) #show ap ac

Active AP Table
---------------
Name   Group        IP Address  11g Clients  11g Ch/EIRP/MaxEIRP  11a Clients  11a Ch/EIRP/MaxEIRP  AP Type  Flags  Uptime       Outer IP
----   -----        ----------  -----------  -------------------  -----------  -------------------  -------  -----  ------       --------
105-1  dBm-Verify  10.0.0.2    0            AP:HT:13/15/22.5     0            AP:HT:48-/20/20      105      R2Bda  23h:12m:41s  172.16.0.2

For the output of above, we can get the information that AP-name 105-1 is set 15dBm in 2.4G and 20dBm in 5G.
But there is no information what's the Conducted Power Set from controller and ANT's dBi.

For verifying the dBm in detail, need to check below command.

(controller) #show ap debug driver-log ap-name 105-1

80.948974 wifi1: EIRP (Config: 15.0dBm, Set: 15.0dBm, AP Max: 22.5dBm, Reg Max: 29dBm), Conducted Power Set: 12.5dBm, Gain: 2.5dBm
Thu Aug  8 04:26:49 2013:649     83246.192239 wifi1: Channel Set to 13 (mesh-mode: 0, state: 5)
Thu Aug  8 04:26:49 2013:650     83246.192284 wifi1: disabling 40Mhz
Thu Aug  8 04:26:49 2013:651     83246.192334 wifi1: RADIO CONFIG DONE
Thu Aug  8 04:33:37 2013:652     83653.933982 wifi1: Scheduling RADIO CONFIG update
Thu Aug  8 04:33:37 2013:653     83653.954770 wifi1: EIRP (Config: 15.0dBm, Set: 15.0dBm, AP Max: 22.5dBm, Reg Max: 29dBm), Conducted Power Set: 12.5dBm, Gain: 2.5dBm
Thu Aug  8 04:33:37 2013:654     83653.954853 wifi1: Channel Set to 9 (mesh-mode: 0, state: 5)
Thu Aug  8 04:33:37 2013:655     83653.954898 wifi1: disabling 40Mhz
Thu Aug  8 04:33:37 2013:656     83653.954947 wifi1: RADIO CONFIG DONE


Driver Log
--------------------------------------------------------
Current Log Level 3 Log Counter 657 Timestamp    83689.127525
652     83653.933982 wifi1: Scheduling RADIO CONFIG update
653     83653.954770 wifi1: EIRP (Config: 15.0dBm, Set: 15.0dBm, AP Max: 22.5dBm, Reg Max: 29dBm), Conducted Power Set: 12.5dBm, Gain: 2.5dBm
654     83653.954853 wifi1: Channel Set to 9 (mesh-mode: 0, state: 5)
655     83653.954898 wifi1: disabling 40Mhz
656     83653.954947 wifi1: RADIO CONFIG DONE


According to the output information, AP-105 model have 2.5dBm ANT Gain by default.
For the case external AP such as AP-104, AP-92, AP-134, it's useful to verify the external ANT's gain and regualtory MAX dBm too.

 

Verification : ArubaOS (MODEL: Aruba3600), Version 6.1.3.5 (build 35523)

 

Version history
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Last update:
‎07-17-2014 05:44 AM
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