Wireless Access

I am using the "default" regulatory domain profile for USA, which has 1, 6 and 11 as available 802.11g channels.  However, when I do show ap active, I see APs bound to channels 5 and 7, as well.  Does anybody have any idea why this is happening?

# show ap act

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
---- ----- ---------- ----------- ------------------- ----------- ------------------- ------- ----- ------ --------
aruba-hsq-16-e1 ggg 192.168.82.234 7 AP:HT:11/22.5/22.5 1 AP:HT:44+/23/23 105 BdaK 9d:4h:56m:42s N/A
aruba-wbw-3-w1 ggg 192.168.109.61 5 AP:HT:11-/22.5/22.5 3 AP:HT:161-/24/24 105 BdaK 9d:5h:0m:21s N/A
aruba-nyc-4-w1 ggg 192.168.107.69 5 AP:HT:11-/22.5/22.5 1 AP:HT:40-/23/23 105 BdaK 9d:5h:0m:50s N/A
aruba-wbw-3-e1 ggg 192.168.109.64 2 AP:HT:5-/22.5/22.5 6 AP:HT:44+/23/23 105 BdaK 9d:4h:58m:48s N/A
aruba-nss-8-1 ggg 192.168.96.83 4 AP:HT:1+/22.5/22.5 1 AP:HT:48-/23/23 105 BdaK 9d:4h:59m:57s N/A
aruba-nyc-5-w1 ggg 192.168.109.90 1 AP:HT:5-/12/22.5 0 AP:HT:153-/24/24 105 BdaK 9d:4h:56m:31s N/A
aruba-aoa-27-e1 ggg 192.168.195.18 0 AP:HT:5-/22.5/22.5 0 AP:HT:153-/24/24 105 BdaK 51d:21h:14m:12s N/A
aruba-nyc-2-w1 ggg 192.168.109.96 9 AP:HT:11/22.5/22.5 1 AP:HT:40-/23/23 105 BdaK 6d:20h:11m:57s N/A
aruba-nyc-5-w2 ggg 192.168.109.74 9 AP:HT:1/22.5/22.5 0 AP:HT:44+/23/23 105 BdaK 9d:5h:1m:41s N/A
aruba-nyc-4-e1 ggg 192.168.107.58 10 AP:HT:11/22.5/22.5 4 AP:HT:153-/24/24 105 BdaK 9d:5h:0m:38s N/A
aruba-nss-7-1 ggg 192.168.96.68 5 AP:HT:5-/22.5/22.5 2 AP:HT:161-/24/24 105 BdaK 9d:5h:0m:12s N/A
aruba-wbw-4-w1 ggg 192.168.109.99 2 AP:HT:7+/21/22.5 2 AP:HT:36+/23/23 105 BdaK 9d:5h:0m:33s N/A
aruba-wbw-4-e1 ggg 192.168.82.134 3 AP:HT:7+/18/22.5 1 AP:HT:157+/24/24 105 BdaK 9d:4h:57m:6s N/A
aruba-nyc-3-e1 ggg 192.168.107.61 2 AP:HT:5-/22.5/22.5 2 AP:HT:36+/23/23 105 BdaK 9d:5h:0m:52s N/A
aruba-hou-10-n1 ggg 192.168.67.1 0 AP:HT:11/22.5/22.5 2 AP:HT:48-/23/23 105 BdaK 3d:11h:40m:57s N/A
aruba-hou-10-s1 ggg 192.168.67.2 3 AP:HT:1/22.5/22.5 0 AP:HT:157+/24/24 105 BdaK 3d:11h:40m:56s N/A
aruba-nyc-5-e1 ggg 192.168.109.60 2 AP:HT:5-/18/22.5 0 AP:HT:48-/23/23 105 BdaK 9d:5h:0m:33s N/A
aruba-hsq-16-w1 ggg 192.168.82.233 4 AP:HT:7+/22.5/22.5 5 AP:HT:48-/23/23 105 BdaK 9d:4h:56m:39s N/A
aruba-nyc-5-e2 ggg 192.168.109.83 4 AP:HT:11/22.5/22.5 0 AP:HT:36+/23/23 105 BdaK 9d:5h:1m:33s N/A

Flags: a = Reduce ARP packets in the air; A = Enet1 in active/standby mode;
B = Battery Boost On; C = Cellular; D = Disconn. Extra Calls On;
d = Drop Mcast/Bcast On; E = Wired AP enabled; K = 802.11K Enabled; n = Don't convert IPv6 Mcast RA to Ucast
L = Client Balancing Enabled; M = Mesh; N = 802.11b protection disabled;
P = PPPOE; R = Remote AP; X = Maintenance Mode;
2 = Using IKE version 2;

Please check the corresponding ARM profile for the APs. And paste the output. Check the field for "allowed bands for 40MHz."

(master) #show rf arm-profile default

Adaptive Radio Management (ARM) profile "default"
-------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels a-only

Confirmed:

#show rf arm-profile ts-arm

Adaptive Radio Management (ARM) profile "ts-arm"
------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels a-only

---

@garryshtern wrote:

Confirmed:

#show rf arm-profile ts-arm

Adaptive Radio Management (ARM) profile "ts-arm"
------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels a-only

 

---

garryshtern, 

I did a quick test on my setup and here is what I observer 

(master) (config) #show rf arm-profile default

Adaptive Radio Management (ARM) profile "default"
-------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels a-only

AP on channel 6 

Active AP Table
---------------
Name Group IP Address 11g Clients 11g Ch/EIRP/MaxEIRP 
---- ----- ---------- ----------- ------------------- 

RAP105 rap 2.2.2.1 0 AP:HT:6/9/22.5 0

 I changed the 40-MHz allowed bands to "All" 

(master) (Adaptive Radio Management (ARM) profile "default") #40MHz-allowed-bands All
(master) (Adaptive Radio Management (ARM) profile "default") #exit

(acmx-master) (config) #show rf arm-profile default

Adaptive Radio Management (ARM) profile "default"
-------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels All

And as soon as I changed this, the AP got the following channel (7+)

Active AP Table
---------------
Name Group IP Address 11g Clients 11g Ch/EIRP/MaxEIRPOuter IP
---- ----- ---------- ----------- ------------------- -----------
RAP105 rap 2.2.2.1 0 AP:HT:7+/9/22.5 

Can you please confirm that none of the ARM profiles have this setting as "All / g-only" 

Quick way to do this would be 

(acmx-master) (config) #show rf arm-profile default

Adaptive Radio Management (ARM) profile "default"
-------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels All

Thanks, 

All of them are good:

# show rf arm-profile

Adaptive Radio Management (ARM) profile List
--------------------------------------------
Name References Profile Status
---- ---------- --------------
arm-maintain 2
arm-scan 2
default 4
ts-arm 2

Total:4

#show rf arm-profile arm-maintain | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile arm-scan | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile default | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile ts-arm | include "Allowed bands"
Allowed bands for 40MHz channels a-only

garryshtern

We will need more information to figure out why are the APs selecting 40MHz channels. Please open up a TAC case so that they can look into the information and provide an answer. 

If you want to prevent APs from taking up those channels then you could remove them from the 

ap regulatory-domain-profile 

(master) (config) #ap regulatory-domain-profile default     

(master) (Regulatory Domain profile "default") #no valid-11g-40mhz-channel-pair 1-5   

(master) (Regulatory Domain profile "default") #no valid-11g-40mhz-channel-pair 7-10 

(master) # write memory 

Just one thought.... in the AP group, are the AP's assigned the US regulatory domain or perhaps a different?

It is set to "default" which is used by my AP group, and the default doesn't have any 40Mhz bonding:

#show ap regulatory-domain-profile default

Regulatory Domain profile "default"
-----------------------------------
Parameter Value
--------- -----
Country Code US
Valid 802.11g channel 1
Valid 802.11g channel 6
Valid 802.11g channel 11
Valid 802.11a channel 36
Valid 802.11a channel 40
Valid 802.11a channel 44
Valid 802.11a channel 48
Valid 802.11a channel 149
Valid 802.11a channel 153
Valid 802.11a channel 157
Valid 802.11a channel 161
Valid 802.11a channel 165
Valid 802.11g 40MHz channel pair N/A
Valid 802.11a 40MHz channel pair 36-40
Valid 802.11a 40MHz channel pair 44-48
Valid 802.11a 40MHz channel pair 149-153
Valid 802.11a 40MHz channel pair 157-161

Also, the channel for the AP that is currently on 5 is set to "N/A":

#show ap active

Active AP Table
---------------

...snip....

aruba-wbw-3-e1   ***  ***  0            AP:HT:5-/22.5/22.5   1            AP:HT:44+/23/23      105      BdaK   9d:9h:4m:42s    N/A

#show ap config ap-name aruba-wbw-3-e1 | include Channel
Channel N/A N/A rf dot11g-radio-profile "AP" / rf dot11a-radio-profile "AP"
RX Sensitivity Tuning Based Channel Reuse disable disable rf dot11g-radio-profile "AP" / rf dot11a-radio-profile "AP"
Free Channel Index 25 25 rf arm-profile "ts-arm"

Do you have ARM assignment set to "maintain" ? 

If the APs selected those channels earlier and then the configuration was set to maintain then the APs would stay on that channel.

show rf arm-profile <profile> | include Assignment 

No, I am using my own custom arm profile:

# show rf arm-profile ts-arm

Adaptive Radio Management (ARM) profile "ts-arm"
------------------------------------------------
Parameter Value
--------- -----
Assignment single-band
Allowed bands for 40MHz channels a-only
Client Aware Enabled
Max Tx EIRP 127 dBm
Min Tx EIRP 9 dBm
Multi Band Scan Enabled
Rogue AP Aware Disabled
Scan Interval 10 sec
Active Scan Disabled
Scanning Enabled
Scan Time 110 msec
VoIP Aware Scan Enabled
Power Save Aware Scan Disabled
Video Aware Scan Enabled
Ideal Coverage Index 10
Acceptable Coverage Index 4
Free Channel Index 25
Backoff Time 240 sec
Error Rate Threshold 50 %
Error Rate Wait Time 30 sec
Noise Threshold 75 -dBm
Noise Wait Time 120 sec
Minimum Scan Time 8
Load aware Scan Threshold 1250000 Bps
Mode Aware Arm Disabled
Scan Mode all-reg-domain

I also tried rebooting APs, and now I don't see any more +/- next to the channels, but they are still using channels 5 & 7, which are not part of the profile.

Please open a TAC case. 

Thanks, 

-- ht

Thanks, I did.  I will post the findings here...

It looks like the APs got stuck in some funky state when I switched the ARM mode, and disabled channel bonding.  Rebooting them fixed the issue.  Everything is properly using only 1, 6 and 11 in g-band, now.

---

@garryshtern wrote:

It looks like the APs got stuck in some funky state when I switched the ARM mode, and disabled channel bonding.  Rebooting them fixed the issue.  Everything is properly using only 1, 6 and 11 in g-band, now.

---

Thanks for the update ! Glad to know that it has been resolved. 

---

@garryshtern wrote:

All of them are good:

# show rf arm-profile

Adaptive Radio Management (ARM) profile List
--------------------------------------------
Name References Profile Status
---- ---------- --------------
arm-maintain 2
arm-scan 2
default 4
ts-arm 2

Total:4

#show rf arm-profile arm-maintain | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile arm-scan | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile default | include "Allowed bands"
Allowed bands for 40MHz channels a-only

#show rf arm-profile ts-arm | include "Allowed bands"
Allowed bands for 40MHz channels a-only

 

---

To see what profiles are responsible for your AP settings, type:

show ap config ap-name <name of ap> | include Channel

 It will tell you what profile is responsible for setting the channel on that AP.