Tx Power Level Assignment

Tx Power Level is an important variable that, in combination with antenna gain, influences coverage patterns. Cisco wireless controller dynamically adjusts transmit power levels according to current RF conditions, access point’s capabilities and local regulatory domain recommendations, that may vary per band and/or channel. We, as an engineers, should be capable to confirm current Tx Power level, list of all supported Tx Power levels and antenna gain (if applicable). No coverage or heatmap approximations can be made without this information. With this post I will provide a number of different useful CLI commands that may be used to quickly find Tx Power levels information per-AP and in bulk.

Different regulatory domains vary in their recommendations as to what channels can be used by 802.11 standard devices and maximum EIRP (Effective Isotropic Radiation Power) levels, which consists of maximum Tx Power and max antenna gain. The following table show FCC limitations in 2.4GHz range only for your reference (applicable to USA, Canada and some South America countries).

2.4GHz Point-to-Multipoint
Max Tx PowerMax Antenna Gain (dBi)Max EIRP (dBm)Max EIGRP (Watts)
30 dBm or 1 W6364
27 dBm or 500 mW9364
24 dBm or 250 mW12364
21 dBm or 125 mW15364
18 dBm or 62 mW18364
15 dBm or 31 mW21364
12 dBm or 16 mW24364

Note: It is possible to increase antenna gain at expense of Tx Power. For each dBm subtracted from Tx Power, one dBi can be added to antenna gain.

 

2.4GHz Point-to-Point
Max Tx PowerMax Antenna Gain (dBi)Max EIRP (dBm)Max EIGRP (Watts)
30 dBm or 1 W6364
29 dBm or 800 mW9386.3
28 dBm or 630 mW124010
27 dBm or 500 mW154216
26 dBm or 400 mW184425
25 dBm or 316 mW214639.8
24 dBm or 250 mW244863
23 dBm or 200 mW2750100
22 dBm or 160 mW3052158

Note: As opposed to the Point-to-Multipoint rules, for each dBm subtracted from Tx Power, three (3) dBi can be added to the antenna gain.

Surprisingly, Cisco does not refer to dBm values on its controllers and access points, instead a number of transmit power levels represent different amount of actual transmit power, where Level 1 stands for max possible Tx Power. The following output examples show supported 802.11a Tx Power levels and corresponding Tx Power amount in dBm for different access point models and regulatory domains.

Europe / Cisco 1242AG-E Tx Power Num Of Supported Power Levels ............. 8 Tx Power Level 1 .......................... 17 dBm Tx Power Level 2 .......................... 15 dBm Tx Power Level 3 .......................... 14 dBm Tx Power Level 4 .......................... 11 dBm Tx Power Level 5 .......................... 8 dBm Tx Power Level 6 .......................... 5 dBm Tx Power Level 7 .......................... 2 dBm Tx Power Level 8 .......................... -1 dBm Current Tx Power Level .................... 1 External Antenna Gain (in .5 dBi units).... 7Europe / Cisco 1142N-E Tx Power Num Of Supported Power Levels ............. 7 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 Level 7 .......................... -1 dBm Current Tx Power Level .................... 1 Internal Antenna Gain (in .5 dBi units).... 8Ukraine / Cisco 2602I-E Tx Power Num Of Supported Power Levels ............. 5 Tx Power Level 1 .......................... 18 dBm Tx Power Level 2 .......................... 15 dBm Tx Power Level 3 .......................... 12 dBm Tx Power Level 4 .......................... 9 dBm Tx Power Level 5 .......................... 6 dBm Current Tx Power Level .................... 1 Internal Antenna Gain (in .5 dBi units).... 8Australia / Cisco 1142N-N Tx Power Num Of Supported Power Levels ............. 6 Tx Power Level 1 .......................... 14 dBm Tx Power Level 2 .......................... 11 dBm Tx Power Level 3 .......................... 8 dBm Tx Power Level 4 .......................... 5 dBm Tx Power Level 5 .......................... 2 dBm Tx Power Level 6 .......................... -1 dBm Current Tx Power Level .................... 1 Internal Antenna Gain (in .5 dBi units).... 8

These outputs were taken directly from the controllers by using the following very useful command:

show ap config 802.11aap-name

show ap config 802.11bap-name

This command also displays a lot of different information about a particular access point, such as supported and current channels, model, software version, supported rates, mode and other. Unfortunately, old versions of AireOS do not support output filtering, like in Cisco IOS (include, exclude). You have to scroll quite a few pages before Tx Power information appears on the screen. Recent versions (starting from 7.5) have grep feature implemented. It can be used at our advantage to minimize the displayed output to only show Tx Power related information, such as shown in my outputs. The full modified command is the following

grep include “Tx Power|Gain” “show ap config 802.11aap-name

To show summary information that includes the whole range of access points that are registered on the controller and their current channels and Tx power levels the following commands may be useful.

show advanced 802.11a txpower

show advanced 802.11b txpower

The output of this command is AireOS version dependent. Earlier versions of AireOS only provide Tx Power Control (TPC) algorithm configuration, such as shown below:

(Cisco Controller) >show advanced 802.11a txpower Automatic Transmit Power Assignment Transmit Power Assignment Mode................. AUTO Transmit Power Update Interval................. 600 seconds Transmit Power Threshold....................... -70 dBm Transmit Power Neighbor Count.................. 3 APs Min Transmit Power............................. -10 dBm Max Transmit Power............................. 30 dBm Transmit Power Update Contribution............. SNI.. Transmit Power Assignment Leader............... CONTROLLER-1 (10.10.10.10) Last Run....................................... 201 seconds ago

Recent versions provide significantly more information, that includes the list of all access points, their supported Tx Power Levels (in dBm) and current channel and Tx Power level configuration:

(Cisco Controller) >show advanced 802.11a txpower Leader Automatic Transmit Power Assignment Transmit Power Assignment Mode................. AUTO Transmit Power Update Interval................. 600 seconds Transmit Power Threshold....................... -70 dBm Transmit Power Neighbor Count.................. 3 APs Min Transmit Power............................. -10 dBm Max Transmit Power............................. 30 dBm Update Contribution Noise........................................ Enable Interference................................. Enable Load......................................... Disable Device Aware................................. Disable Transmit Power Assignment Leader............... CONTROLLER-2 (10.10.10.20) Last Run....................................... 414 seconds ago Last Run Time.................................. 0 seconds TPC Mode....................................... Version 1 TPCv2 Target RSSI.............................. -67 dBm TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm TPCv2 SOP...................................... -85.0 dBm TPCv2 Default Client Ant Gain.................. 0.0 dBi TPCv2 Path Loss Decay Factor................... 3.6 TPCv2 Search Intensity......................... 10 Iterations AP Name Channel TxPower Allowed Power Levels -------------------------------- ---------- ------------- ------------------------ AP-1  *40 *1/5 (18 dBm) [18/15/12/9/6/6/6/6] AP-2  *36 *1/5 (18 dBm) [18/15/12/9/6/6/6/6] AP-3  *44 *2/5 (15 dBm) [18/15/12/9/6/6/6/6]

Note: 1/5 TxPower means that current Tx Power level is 1 out of 5 total. In turn, Allowed Power Levels column lists all possible Tx Power levels in dBm, where Level 1 is represented by the leftmost value, or 18 dBm in our example. Even though 8 different values are shown, only 5 leftmost are significant (that is, access points support only 5 different levels). The rest must be ignored.

Another command that may be useful finding Tx Power information for all access points in one go is

show advanced 802.11a summary

show advanced 802.11b summary

It shows brief information about all connected access points and their operational state for the specific band, including channel in use and current Tx Power level. Apart from Tx Power Level, recent versions of AireOS also show a real Tx Power amount in dBm. Older versions of AireOS show Tx Power Level only and no any values in dBm. Therefore engineer must be aware what dBm values correspond to shown levels.

WLC 4402 using 7.0.250.0 code:

(Cisco Controller) >show advanced 802.11a summary AP Name MAC Address Admin State Operation State Channel TxPower -------------------------------- ------------------ ------------ ----- Kyiv-1 6c:9c:ed:b5:a4:d0 ENABLED UP 64* 1(*)

WLC 5508 using 7.5.102.0 code:

(Cisco Controller) >show advanced 802.11a summary Member RRM Information AP Name MAC Address Slot Admin Oper Channel TxPower -------------------------------- ----------------- ---- -------- AP-1 f4:1f:c2:e7:a1:80 1 ENABLED UP 40* *1/5 (18 dBm) AP-2 0c:27:24:0f:7f:30 1 ENABLED UP 36* *1/5 (18 dBm) AP-3 f4:1f:c2:5b:a4:b0 1 ENABLED UP 44* *2/5 (15 dBm)

Hope you find this useful.

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About Tim Dmitrenko

I am a network engineer, experienced in Enterprise networks support, including troubleshooting, implementing and designing Cisco-based solutions. My main areas of responsibility are Switching and Routing, Wireless, QoS and Data Centers (N5Ks).

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*** The issue I am describing in this post applicable only if you have deployed 3700, 2600, 2700, 3600,1700 series APs, in -Z and -T regulatory domains or in below countries. Refer this document for regulatory domain details.***

Australia (-Z)
New Zealand (-Z)
Brazil (–Z/-T)
Taiwan (-T)

I have deployed 500+ APs (3702I) recently and expected 5GHz clients exceed 2.4GHz in these area as network was pretty much designed for 5GHz and 1/3 of 2.4GHz radios turned off. Still I could not see it becomes a reality.

.

Then I saw this post in CSC forum & check if this could be the reason for above behavior.

Low Tx power levels on Cisco 3702i AP

My WLC is running on 8.1.131.0 code and “show advanced 802.11 txpower” output verify my APs are affected by this. Most of the 5GHz radios do not get power level beyond 8 dBm which is a serverity 2 bug (CSCux23003)of the current WLC code releases

(XXX-WLC) >show advanced 802.11a txpower Leader Automatic Transmit Power Assignment   Transmit Power Assignment Mode................. AUTO   Transmit Power Update Interval................. 600 seconds   Transmit Power Threshold....................... -70 dBm   Transmit Power Neighbor Count.................. 3 APs   Min Transmit Power............................. 8 dBm   Max Transmit Power............................. 17 dBm   Update Contribution     Noise........................................ Enable     Interference................................. Enable     Load......................................... Disable     Device Aware................................. Disable   Transmit Power Assignment Leader............... XXX-WC01   Last Run....................................... 132 seconds ago   Last Run Time.................................. 1 seconds   TPC Mode....................................... Version 1   TPCv2 Target RSSI.............................. -67 dBm   TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm   TPCv2 SOP...................................... -85.0 dBm   TPCv2 Default Client Ant Gain..................   0.0 dBi   TPCv2 Path Loss Decay Factor...................   3.6   TPCv2 Search Intensity......................... 10 Iterations AP Name               Channel    TxPower       Allowed Power Levels     ----------------------- ---------- ------------- ------------------------ AP05-L2APT62         *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP08-L2APT18         *(149,153) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] AP04-L3APT59         *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP04-L2APT11         *(161,157) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] AP02-L3APT54         *(52,56)   *1/5 (16 dBm) [16/13/10/7/4/4/4/4] AP06-L3APT26         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP01-L1APT01         *(149,153) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] AP01-L2APT53         *(149,153) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] AP08-L1APT08         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP03-L2APT32         *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP05-L1APT05         *(149,153) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] AP05-L3APT36         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP01-L3APT21         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP08-L1APT08         *(52,56)   *1/6 (16 dBm) [16/13/10/7/4/1/1/1] AP04-L3APT50         *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP06-L1APT06         *(48,44)   *1/3 ( 9 dBm) [9/6/3/3/3/3/3/3] AP03-L3APT17         *(64,60)   *1/6 (16 dBm) [16/13/10/7/4/1/1/1] AP02-L3APT16         *(44,48)   *1/3 ( 9 dBm) [9/6/3/3/3/3/3/3] AP05-L1APT60         *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP01-L1APT30         *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP02-L2APT09         *(161,157) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] AP05-L3APT51         *(60,64)   *2/5 (13 dBm) [16/13/10/7/4/4/4/4] AP07-L2APT14         *(52,56)   *1/5 (16 dBm) [16/13/10/7/4/4/4/4] AP06-L2APT13         *(64,60)   *1/5 (16 dBm) [16/13/10/7/4/4/4/4] AP02-L1R0131         *(44,48)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP05-L2R0206         *(60,64)   *3/5 (10 dBm) [16/13/10/7/4/4/4/4] AP05-L2APT12         *(48,44)   *1/3 ( 9 dBm) [9/6/3/3/3/3/3/3] AP01-L3APT53         *(60,64)   *1/5 (16 dBm) [16/13/10/7/4/4/4/4] AP07-L1APT07         *(64,60)   *1/6 (16 dBm) [16/13/10/7/4/1/1/1] AP02-L3APT47         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2]

As you can see all my AP 5GHz Radios operate in UNII-1  band (CH 36,40,44,48) has maximum power of 8/9dBm. Typically this power level is below the typical client power level (so AP’s 5GHz coverage will be very less)

All APs operate in UNII-2 (CH 52,56,60,64) has maximum power level 16dBm.

Then I checked this on WLCs operate in 8.0.120.0 code & problem remain same.

(YYY-WC01) >show ap summary AP Name             Slots  AP Model             ------------------  -----  -------------------- YYY-L3R0360R00-AP028  2     AIR-CAP3702I-Z-K9    YYY-L1R0G06R00-AP01  2     AIR-CAP3602I-N-K9     YYYYYY-L1R0OUTR00-AP01  2     AIR-CAP3602I-N-K9  YYY-L1R0OUTR00-AP04  2     AIR-CAP3602I-N-K9     YYY-L1R0OUTR00-AP02  2     AIR-CAP3602I-N-K9       YYY-L1R0OUTR00-AP03  2     AIR-CAP3602I-N-K9    YYY-LBASEMENTR00-AP02  2     AIR-CAP3702I-Z-K9      YYY-LBASEMENTR00-AP03  2     AIR-CAP3702I-Z-K9     YYY-LBASEMENTR00-AP05  2     AIR-CAP3702I-Z-K9     YYY-LBASEMENTR00-AP04  2     AIR-CAP3702I-Z-K9     YYY-LBASEMENTR00-AP01  2     AIR-CAP3702I-Z-K9        YYY-L1RPORTR01-AP01  2     AIR-CAP3602I-N-K9       APc464.13b4.4af8     2     AIR-CAP3602I-N-K9       APc464.13b4.2179     2     AIR-CAP3602I-N-K9        APc464.13b4.20d6     2     AIR-CAP3602I-N-K9       APc464.13b4.1d93     2     AIR-CAP3602I-N-K9     YYY-L2-AP01     2     AIR-CAP3602I-N-K9     YYY-L1RC126R00-AP01  2     AIR-LAP1252AG-N-K9   YYY-L3R0316R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L3R0305R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L2R0221R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L2R0212R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L2R0233R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L2R0225R00-AP01  2     AIR-CAP3602I-N-K9     YYY-L2R0215R00-AP01  2     AIR-CAP3602I-N-K9     YYY-L2R0230R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L2R0CLTR00-AP26  2     AIR-CAP3702I-Z-K9       YYY-L3R0325R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L3R0346R01-AP013  2     AIR-CAP3702I-Z-K9     YYY-L3R0341R01-AP018  2     AIR-CAP3702I-Z-K9       YYY-L2RCOMMS-AP27  2     AIR-CAP3702I-Z-K9     YYY-L4R0413R00-AP01  2     AIR-CAP3602I-N-K9       YYY-L3R346aR01-AP020  2     AIR-CAP3702I-Z-K9   YYY-L3R0346R01-AP015  2     AIR-CAP3702I-Z-K9      YYY-L3R0339R00-AP027  2     AIR-CAP3702I-Z-K9   YYY-L3R0352R01-AP012  2     AIR-CAP3702I-Z-K9       YYY-L2R0CLTR00-AP13  2     AIR-CAP3702I-Z-K9       (YYY-WC01) >show advanced 802.11a txpower Leader Automatic Transmit Power Assignment   Transmit Power Assignment Mode................. AUTO   Transmit Power Update Interval................. 600 seconds   Transmit Power Threshold....................... -70 dBm   Transmit Power Neighbor Count.................. 3 APs   Min Transmit Power............................. -10 dBm   Max Transmit Power............................. 30 dBm   Update Contribution     Noise........................................ Enable     Interference................................. Enable     Load......................................... Disable     Device Aware................................. Disable   Transmit Power Assignment Leader............... YYY-WC01   Last Run....................................... 248 seconds ago   Last Run Time.................................. 0 seconds   TPC Mode....................................... Version 1   TPCv2 Target RSSI.............................. -67 dBm   TPCv2 VoWLAN Guide RSSI........................ -67.0 dBm   TPCv2 SOP...................................... -85.0 dBm   TPCv2 Default Client Ant Gain..................   0.0 dBi   TPCv2 Path Loss Decay Factor...................   3.6   TPCv2 Search Intensity......................... 10 Iterations AP Name                     Channel    TxPower       Allowed Power Levels     ------------------------- ---------- ------------- ------------------------ YYY-L3R0360R00-AP028        *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L1R0G06R00-AP01         *(40,36)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] YYY-L1R0OUTR00-AP01         *(161,157) *3/8 (17 dBm) [23/20/17/14/11/8/5/2] YYY-L1R0OUTR00-AP04         *(153,149) *4/8 (14 dBm) [23/20/17/14/11/8/5/2] YYY-L1R0OUTR00-AP02         *(157,161) *4/8 (14 dBm) [23/20/17/14/11/8/5/2] YYY-L1R0OUTR00-AP03         *(40,36)   *3/5 ( 8 dBm) [14/11/8/5/2/2/2/2] YYY-LBASEMENTR00-AP02       *(48,44)   *3/3 ( 2 dBm) [8/5/2/2/2/2/2/2] YYY-LBASEMENTR00-AP03       *(36,40)   *3/3 ( 2 dBm) [8/5/2/2/2/2/2/2] YYY-LBASEMENTR00-AP05       *(161,157) *8/8 ( 2 dBm) [23/20/17/14/11/8/5/2] YYY-LBASEMENTR00-AP04       *(64,60)   *5/5 ( 4 dBm) [16/13/10/7/4/4/4/4] YYY-LBASEMENTR00-AP01       *(149,153) *8/8 ( 2 dBm) [23/20/17/14/11/8/5/2] YYY-L1RPORTR01-AP01         *(36,40)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] APc464.13b4.4af8            *(36,40)   *3/5 ( 8 dBm) [14/11/8/5/2/2/2/2] APc464.13b4.2179            *(149,153) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] APc464.13b4.20d6            *(64,60)   *2/5 (11 dBm) [14/11/8/5/2/2/2/2] APc464.13b4.1d93            *(36,40)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] YYY-L2-AP01                 *(48,44)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] YYY-L1RC126R00-AP01         *(149,153) *1/7 (17 dBm) [17/14/11/8/5/2/-1/0] YYY-L3R0316R00-AP01         *(36,40)   *2/5 (11 dBm) [14/11/8/5/2/2/2/2] YYY-L3R0305R00-AP01         *(64,60)   *2/5 (11 dBm) [14/11/8/5/2/2/2/2] YYY-L2R0221R00-AP01         *(64,60)   *2/5 (11 dBm) [14/11/8/5/2/2/2/2] YYY-L2R0212R00-AP01         *(36,40)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] YYY-L2R0233R00-AP01         *(149,153) *6/8 ( 8 dBm) [23/20/17/14/11/8/5/2] YYY-L2R0225R00-AP01         *(161,157) *7/8 ( 5 dBm) [23/20/17/14/11/8/5/2] YYY-L2R0215R00-AP01         *(149,153) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] YYY-L2R0230R00-AP01         *(48,44)   *4/5 ( 5 dBm) [14/11/8/5/2/2/2/2] YYY-L2R0CLTR00-AP26         *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L3R0325R00-AP01         *(56,52)   *2/5 (11 dBm) [14/11/8/5/2/2/2/2] YYY-L3R0346R01-AP013        *(36,40)   *3/3 ( 2 dBm) [8/5/2/2/2/2/2/2] YYY-L3R0341R01-AP018        *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L2RCOMMS-AP27           *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L4R0413R00-AP01         *(64,60)   *1/5 (14 dBm) [14/11/8/5/2/2/2/2] YYY-L3R346aR01-AP020        *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L3R0346R01-AP015        *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] YYY-L3R0339R00-AP027        *(149,153) *7/8 ( 5 dBm) [23/20/17/14/11/8/5/2] YYY-L3R0352R01-AP012        *(149,153) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] YYY-L2R0CLTR00-AP13         *(161,157) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] YYY-L3R0319R00-AP01         *(161,157) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] YYY-L3R0354R01-AP016        *(161,157) *5/8 (11 dBm) [23/20/17/14/11/8/5/2] YYY-L1R1.21R00-AP27         *(48,44)   *2/3 ( 5 dBm) [8/5/2/2/2/2/2/2] YYY-L1R0149R00-AP17         *(161,157) *7/8 ( 5 dBm) [23/20/17/14/11/8/5/2]

This bug is not fixed in the 8.0MR3 (8.0.132.0) code which is released very recently. Here is the release note of that code.

As per the bug details only 8.0.134.7, 8.1.131.17,8.2.100.7 & 8.3.15.79 are the code versions this issue has been fixed. None of them are public releases 😯

Therefore I have to go with another engineering release for sometime.

If you have wireless deployment in these countries, please be aware of this issue.

Update @ 16th May
I have upgraded most of my WLCs to 8.1.131.18 which had the fix for this. One WLC upgraded to 8.0.134.14 (8.0MR4 beta) as some legacy AP to be supported. As you can see below issue has been fixed with this code upgrade for me.

with 8.1.131.0 AP Name               Channel    TxPower       Allowed Power Levels   ----------------------- ---------- ------------- ------ AP05-L2APT62         *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP04-L3APT59         *(36,40)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP06-L3APT26         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP08-L1APT08         *(40,36)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2] AP03-L2APT32         *(48,44)   *1/3 ( 8 dBm) [8/5/2/2/2/2/2/2]  with 8.1.131.18  AP Name               Channel    TxPower       Allowed Power Levels   -------------------- ---------- ------------- ------------ AP05-L2APT62         *(36,40)   *1/5 (15 dBm) [15/12/9/6/3/3/3/3] AP04-L3APT59         *(52,56)   *1/5 (16 dBm) [16/13/10/7/4/4/4/4] AP06-L3APT26         *(40,36)   *1/5 (15 dBm) [15/12/9/6/3/3/3/3] AP08-L1APT08         *(52,56)   *1/6 (16 dBm) [16/13/10/7/4/1/1/1] AP03-L2APT32         *(48,44)   *1/5 (15 dBm) [15/12/9/6/3/3/3/3]

References
1. 802.11 EIRP Limitations in Australia
2. AU-Radiocommunications (Low Interference Potential Devices) Class Licence 2000

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